Channels / User Profile
User Info
Maksim Al Dandan
| ID | 8404447988 |
|---|---|
| Type | user |
| Username | @mx_aldandan |
| First Name | Maksim |
| Last Name | Al Dandan |
| Phone | 998940909767 |
| First Seen | 2026-02-17 10:28 UTC |
| Updated | 2026-02-17 10:28 UTC |
Statistics
Total Messages: 20
Active in: 1 channel(s)
Activity by Channel
Recent Messages
📎 Webpage (not supported)
Hello,
My name is Maksim. I am a Senior Java Backend Engineer with 6+ years of experience building and scaling revenue-critical payment and crypto processing systems in banking and fintech.
In my current role, I acted as a technical lead for a team of three engineers, building a QR payment platform from scratch. The system processes 18M+ transactions annually and directly contributes to multi-million annual revenue. I was responsible for core architectural decisions — enforcing idempotent execution, designing rate-limited REST integrations, and implementing end-to-end observability to guarantee financial traceability and production stability under high load.
In parallel, I designed and implemented an ISO 8583-based crypto transaction processing engine, handling message parsing, transaction classification, and routing to external crypto exchange services, processing ~22,000+ operations daily with dynamic configuration via Redis and zero-downtime updates. I also worked on crypto card infrastructure, including card lifecycle operations and integration with core banking systems and external card processors (Visa/Mastercard, HUMO), covering secure PAN handling, transaction flows, and partner-facing APIs.
Additionally, I redesigned and scaled a high-load transfer service generating ~$4.56M in annual commission revenue. By introducing asynchronous AML execution, batched job processing, and multi-instance-safe orchestration, I ensured predictable scaling to ~500 RPS peak. I increased payment conversion from 64% to 89% and eliminated a double-payment race condition that had been causing ~$146K in monthly financial losses.
My focus is ownership of complex financial and crypto flows: building resilient architectures, optimizing transaction pipelines, and ensuring system stability under high load. I am interested in roles where backend engineering directly impacts business metrics and system performance.
I would welcome the opportunity to contribute as a senior engineer who can deliver independently and take responsibility for critical systems. Here's my CV: https://docs.google.com/document/d/1rp4d5L-gXHBckb-0fHewIEKFnBMBqOkbR6bHN4T7Zy0/edit?usp=sharing
My name is Maksim. I am a Senior Java Backend Engineer with 6+ years of experience building and scaling revenue-critical payment and crypto processing systems in banking and fintech.
In my current role, I acted as a technical lead for a team of three engineers, building a QR payment platform from scratch. The system processes 18M+ transactions annually and directly contributes to multi-million annual revenue. I was responsible for core architectural decisions — enforcing idempotent execution, designing rate-limited REST integrations, and implementing end-to-end observability to guarantee financial traceability and production stability under high load.
In parallel, I designed and implemented an ISO 8583-based crypto transaction processing engine, handling message parsing, transaction classification, and routing to external crypto exchange services, processing ~22,000+ operations daily with dynamic configuration via Redis and zero-downtime updates. I also worked on crypto card infrastructure, including card lifecycle operations and integration with core banking systems and external card processors (Visa/Mastercard, HUMO), covering secure PAN handling, transaction flows, and partner-facing APIs.
Additionally, I redesigned and scaled a high-load transfer service generating ~$4.56M in annual commission revenue. By introducing asynchronous AML execution, batched job processing, and multi-instance-safe orchestration, I ensured predictable scaling to ~500 RPS peak. I increased payment conversion from 64% to 89% and eliminated a double-payment race condition that had been causing ~$146K in monthly financial losses.
My focus is ownership of complex financial and crypto flows: building resilient architectures, optimizing transaction pipelines, and ensuring system stability under high load. I am interested in roles where backend engineering directly impacts business metrics and system performance.
I would welcome the opportunity to contribute as a senior engineer who can deliver independently and take responsibility for critical systems. Here's my CV: https://docs.google.com/document/d/1rp4d5L-gXHBckb-0fHewIEKFnBMBqOkbR6bHN4T7Zy0/edit?usp=sharing
📎 Webpage (not supported)
Status: #резюме #CV #ищуработу #opentowork
Specialization: #java #spring #fintech #highload #backend
Level: #senior #lead
Languages: English (C1), Russian (Native)
Experience: 6+ years
CV: Link to CV
Hello,
My name is Maksim. I am a Senior Java Backend Engineer with 6+ years of experience building and scaling revenue-critical payment and crypto processing systems in banking and fintech
In my current role, I acted as a technical lead for a team of three engineers, building a QR payment platform from scratch. The system processes 18M+ transactions annually and directly contributes to multi-million annual revenue. I was responsible for core architectural decisions — enforcing idempotent execution, designing rate-limited REST integrations, and implementing end-to-end observability to guarantee financial traceability and production stability under high load.
In parallel, I designed and implemented an ISO 8583-based crypto transaction processing engine, handling message parsing, transaction classification, and routing to external crypto exchange services, processing ~22,000+ operations daily with dynamic configuration via Redis and zero-downtime updates. I also worked on crypto card infrastructure, including card lifecycle operations and integration with core banking systems and external card processors (Visa/Mastercard, HUMO), covering secure PAN handling, transaction flows, and partner-facing APIs .
Additionally, I redesigned and scaled a high-load transfer service generating ~$4.56M in annual commission revenue. By introducing asynchronous AML execution, batched job processing, and multi-instance-safe orchestration, I ensured predictable scaling to ~500 RPS peak. I increased payment conversion from 64% to 89% and eliminated a double-payment race condition that had been causing ~$146K in monthly financial losses.
My focus is ownership of complex financial and crypto flows: building resilient architectures, optimizing transaction pipelines, and ensuring system stability under high load. I am interested in roles where backend engineering directly impacts business metrics and system performance.
I would welcome the opportunity to contribute as a senior engineer who can deliver independently and take responsibility for critical systems.
#fulltime #parttime #remote #relocation
Specialization: #java #spring #fintech #highload #backend
Level: #senior #lead
Languages: English (C1), Russian (Native)
Experience: 6+ years
CV: Link to CV
Hello,
My name is Maksim. I am a Senior Java Backend Engineer with 6+ years of experience building and scaling revenue-critical payment and crypto processing systems in banking and fintech
In my current role, I acted as a technical lead for a team of three engineers, building a QR payment platform from scratch. The system processes 18M+ transactions annually and directly contributes to multi-million annual revenue. I was responsible for core architectural decisions — enforcing idempotent execution, designing rate-limited REST integrations, and implementing end-to-end observability to guarantee financial traceability and production stability under high load.
In parallel, I designed and implemented an ISO 8583-based crypto transaction processing engine, handling message parsing, transaction classification, and routing to external crypto exchange services, processing ~22,000+ operations daily with dynamic configuration via Redis and zero-downtime updates. I also worked on crypto card infrastructure, including card lifecycle operations and integration with core banking systems and external card processors (Visa/Mastercard, HUMO), covering secure PAN handling, transaction flows, and partner-facing APIs .
Additionally, I redesigned and scaled a high-load transfer service generating ~$4.56M in annual commission revenue. By introducing asynchronous AML execution, batched job processing, and multi-instance-safe orchestration, I ensured predictable scaling to ~500 RPS peak. I increased payment conversion from 64% to 89% and eliminated a double-payment race condition that had been causing ~$146K in monthly financial losses.
My focus is ownership of complex financial and crypto flows: building resilient architectures, optimizing transaction pipelines, and ensuring system stability under high load. I am interested in roles where backend engineering directly impacts business metrics and system performance.
I would welcome the opportunity to contribute as a senior engineer who can deliver independently and take responsibility for critical systems.
#fulltime #parttime #remote #relocation
📎 Webpage (not supported)
Status: #резюме #CV #ищуработу #opentowork
Specialization: #java #spring #fintech #highload #backend
Level: #senior #lead
Languages: English (C1), Russian (Native)
Experience: 6+ years
CV: Link to CV
Hello,
My name is Maksim. I am a Senior Java Backend Engineer with 6+ years of experience building and scaling revenue-critical payment and crypto processing systems in banking and fintech
In my current role, I acted as a technical lead for a team of three engineers, building a QR payment platform from scratch. The system processes 18M+ transactions annually and directly contributes to multi-million annual revenue. I was responsible for core architectural decisions — enforcing idempotent execution, designing rate-limited REST integrations, and implementing end-to-end observability to guarantee financial traceability and production stability under high load.
In parallel, I designed and implemented an ISO 8583-based crypto transaction processing engine, handling message parsing, transaction classification, and routing to external crypto exchange services, processing ~22,000+ operations daily with dynamic configuration via Redis and zero-downtime updates. I also worked on crypto card infrastructure, including card lifecycle operations and integration with core banking systems and external card processors (Visa/Mastercard, HUMO), covering secure PAN handling, transaction flows, and partner-facing APIs .
Additionally, I redesigned and scaled a high-load transfer service generating ~$4.56M in annual commission revenue. By introducing asynchronous AML execution, batched job processing, and multi-instance-safe orchestration, I ensured predictable scaling to ~500 RPS peak. I increased payment conversion from 64% to 89% and eliminated a double-payment race condition that had been causing ~$146K in monthly financial losses.
My focus is ownership of complex financial and crypto flows: building resilient architectures, optimizing transaction pipelines, and ensuring system stability under high load. I am interested in roles where backend engineering directly impacts business metrics and system performance.
I would welcome the opportunity to contribute as a senior engineer who can deliver independently and take responsibility for critical systems.
#fulltime #parttime #remote #relocation
Specialization: #java #spring #fintech #highload #backend
Level: #senior #lead
Languages: English (C1), Russian (Native)
Experience: 6+ years
CV: Link to CV
Hello,
My name is Maksim. I am a Senior Java Backend Engineer with 6+ years of experience building and scaling revenue-critical payment and crypto processing systems in banking and fintech
In my current role, I acted as a technical lead for a team of three engineers, building a QR payment platform from scratch. The system processes 18M+ transactions annually and directly contributes to multi-million annual revenue. I was responsible for core architectural decisions — enforcing idempotent execution, designing rate-limited REST integrations, and implementing end-to-end observability to guarantee financial traceability and production stability under high load.
In parallel, I designed and implemented an ISO 8583-based crypto transaction processing engine, handling message parsing, transaction classification, and routing to external crypto exchange services, processing ~22,000+ operations daily with dynamic configuration via Redis and zero-downtime updates. I also worked on crypto card infrastructure, including card lifecycle operations and integration with core banking systems and external card processors (Visa/Mastercard, HUMO), covering secure PAN handling, transaction flows, and partner-facing APIs .
Additionally, I redesigned and scaled a high-load transfer service generating ~$4.56M in annual commission revenue. By introducing asynchronous AML execution, batched job processing, and multi-instance-safe orchestration, I ensured predictable scaling to ~500 RPS peak. I increased payment conversion from 64% to 89% and eliminated a double-payment race condition that had been causing ~$146K in monthly financial losses.
My focus is ownership of complex financial and crypto flows: building resilient architectures, optimizing transaction pipelines, and ensuring system stability under high load. I am interested in roles where backend engineering directly impacts business metrics and system performance.
I would welcome the opportunity to contribute as a senior engineer who can deliver independently and take responsibility for critical systems.
#fulltime #parttime #remote #relocation
📎 Webpage (not supported)
Status: #резюме #CV #ищуработу #opentowork
Specialization: #java #spring #fintech #highload #backend
Level: #senior #lead
Languages: English (C1), Russian (Native)
Experience: 6+ years
CV: Link to CV
Hello,
My name is Maksim. I am a Senior Java Backend Engineer with 6+ years of experience building and scaling revenue-critical payment and crypto processing systems in banking and fintech
In my current role, I acted as a technical lead for a team of three engineers, building a QR payment platform from scratch. The system processes 18M+ transactions annually and directly contributes to multi-million annual revenue. I was responsible for core architectural decisions — enforcing idempotent execution, designing rate-limited REST integrations, and implementing end-to-end observability to guarantee financial traceability and production stability under high load.
In parallel, I designed and implemented an ISO 8583-based crypto transaction processing engine, handling message parsing, transaction classification, and routing to external crypto exchange services, processing ~22,000+ operations daily with dynamic configuration via Redis and zero-downtime updates. I also worked on crypto card infrastructure, including card lifecycle operations and integration with core banking systems and external card processors (Visa/Mastercard, HUMO), covering secure PAN handling, transaction flows, and partner-facing APIs .
Additionally, I redesigned and scaled a high-load transfer service generating ~$4.56M in annual commission revenue. By introducing asynchronous AML execution, batched job processing, and multi-instance-safe orchestration, I ensured predictable scaling to ~500 RPS peak. I increased payment conversion from 64% to 89% and eliminated a double-payment race condition that had been causing ~$146K in monthly financial losses.
My focus is ownership of complex financial and crypto flows: building resilient architectures, optimizing transaction pipelines, and ensuring system stability under high load. I am interested in roles where backend engineering directly impacts business metrics and system performance.
I would welcome the opportunity to contribute as a senior engineer who can deliver independently and take responsibility for critical systems.
#fulltime #parttime #remote #relocation
Specialization: #java #spring #fintech #highload #backend
Level: #senior #lead
Languages: English (C1), Russian (Native)
Experience: 6+ years
CV: Link to CV
Hello,
My name is Maksim. I am a Senior Java Backend Engineer with 6+ years of experience building and scaling revenue-critical payment and crypto processing systems in banking and fintech
In my current role, I acted as a technical lead for a team of three engineers, building a QR payment platform from scratch. The system processes 18M+ transactions annually and directly contributes to multi-million annual revenue. I was responsible for core architectural decisions — enforcing idempotent execution, designing rate-limited REST integrations, and implementing end-to-end observability to guarantee financial traceability and production stability under high load.
In parallel, I designed and implemented an ISO 8583-based crypto transaction processing engine, handling message parsing, transaction classification, and routing to external crypto exchange services, processing ~22,000+ operations daily with dynamic configuration via Redis and zero-downtime updates. I also worked on crypto card infrastructure, including card lifecycle operations and integration with core banking systems and external card processors (Visa/Mastercard, HUMO), covering secure PAN handling, transaction flows, and partner-facing APIs .
Additionally, I redesigned and scaled a high-load transfer service generating ~$4.56M in annual commission revenue. By introducing asynchronous AML execution, batched job processing, and multi-instance-safe orchestration, I ensured predictable scaling to ~500 RPS peak. I increased payment conversion from 64% to 89% and eliminated a double-payment race condition that had been causing ~$146K in monthly financial losses.
My focus is ownership of complex financial and crypto flows: building resilient architectures, optimizing transaction pipelines, and ensuring system stability under high load. I am interested in roles where backend engineering directly impacts business metrics and system performance.
I would welcome the opportunity to contribute as a senior engineer who can deliver independently and take responsibility for critical systems.
#fulltime #parttime #remote #relocation
📎 Webpage (not supported)
Status: #резюме #CV #ищуработу #opentowork
Specialization: #java #spring #fintech #highload #backend
Level: #senior #lead
Languages: English (C1), Russian (Native)
Experience: 6+ years
CV: Link to CV
Hello,
My name is Maksim. I am a Senior Java Backend Engineer with 6+ years of experience building and scaling revenue-critical payment and crypto processing systems in banking and fintech
In my current role, I acted as a technical lead for a team of three engineers, building a QR payment platform from scratch. The system processes 18M+ transactions annually and directly contributes to multi-million annual revenue. I was responsible for core architectural decisions — enforcing idempotent execution, designing rate-limited REST integrations, and implementing end-to-end observability to guarantee financial traceability and production stability under high load.
In parallel, I designed and implemented an ISO 8583-based crypto transaction processing engine, handling message parsing, transaction classification, and routing to external crypto exchange services, processing ~22,000+ operations daily with dynamic configuration via Redis and zero-downtime updates. I also worked on crypto card infrastructure, including card lifecycle operations and integration with core banking systems and external card processors (Visa/Mastercard, HUMO), covering secure PAN handling, transaction flows, and partner-facing APIs .
Additionally, I redesigned and scaled a high-load transfer service generating ~$4.56M in annual commission revenue. By introducing asynchronous AML execution, batched job processing, and multi-instance-safe orchestration, I ensured predictable scaling to ~500 RPS peak. I increased payment conversion from 64% to 89% and eliminated a double-payment race condition that had been causing ~$146K in monthly financial losses.
My focus is ownership of complex financial and crypto flows: building resilient architectures, optimizing transaction pipelines, and ensuring system stability under high load. I am interested in roles where backend engineering directly impacts business metrics and system performance.
I would welcome the opportunity to contribute as a senior engineer who can deliver independently and take responsibility for critical systems.
#fulltime #parttime #remote #relocation
Specialization: #java #spring #fintech #highload #backend
Level: #senior #lead
Languages: English (C1), Russian (Native)
Experience: 6+ years
CV: Link to CV
Hello,
My name is Maksim. I am a Senior Java Backend Engineer with 6+ years of experience building and scaling revenue-critical payment and crypto processing systems in banking and fintech
In my current role, I acted as a technical lead for a team of three engineers, building a QR payment platform from scratch. The system processes 18M+ transactions annually and directly contributes to multi-million annual revenue. I was responsible for core architectural decisions — enforcing idempotent execution, designing rate-limited REST integrations, and implementing end-to-end observability to guarantee financial traceability and production stability under high load.
In parallel, I designed and implemented an ISO 8583-based crypto transaction processing engine, handling message parsing, transaction classification, and routing to external crypto exchange services, processing ~22,000+ operations daily with dynamic configuration via Redis and zero-downtime updates. I also worked on crypto card infrastructure, including card lifecycle operations and integration with core banking systems and external card processors (Visa/Mastercard, HUMO), covering secure PAN handling, transaction flows, and partner-facing APIs .
Additionally, I redesigned and scaled a high-load transfer service generating ~$4.56M in annual commission revenue. By introducing asynchronous AML execution, batched job processing, and multi-instance-safe orchestration, I ensured predictable scaling to ~500 RPS peak. I increased payment conversion from 64% to 89% and eliminated a double-payment race condition that had been causing ~$146K in monthly financial losses.
My focus is ownership of complex financial and crypto flows: building resilient architectures, optimizing transaction pipelines, and ensuring system stability under high load. I am interested in roles where backend engineering directly impacts business metrics and system performance.
I would welcome the opportunity to contribute as a senior engineer who can deliver independently and take responsibility for critical systems.
#fulltime #parttime #remote #relocation
📎 Webpage (not supported)
Status: #резюме #CV #ищуработу #opentowork
Specialization: #java #spring #fintech #highload #backend
Level: #senior #lead
Languages: English (C1), Russian (Native)
Experience: 6+ years
CV: Link to CV
Hello,
My name is Maksim. I am a Senior Java Backend Engineer with 6+ years of experience building and scaling revenue-critical payment and crypto processing systems in banking and fintech
In my current role, I acted as a technical lead for a team of three engineers, building a QR payment platform from scratch. The system processes 18M+ transactions annually and directly contributes to multi-million annual revenue. I was responsible for core architectural decisions — enforcing idempotent execution, designing rate-limited REST integrations, and implementing end-to-end observability to guarantee financial traceability and production stability under high load.
In parallel, I designed and implemented an ISO 8583-based crypto transaction processing engine, handling message parsing, transaction classification, and routing to external crypto exchange services, processing ~22,000+ operations daily with dynamic configuration via Redis and zero-downtime updates. I also worked on crypto card infrastructure, including card lifecycle operations and integration with core banking systems and external card processors (Visa/Mastercard, HUMO), covering secure PAN handling, transaction flows, and partner-facing APIs .
Additionally, I redesigned and scaled a high-load transfer service generating ~$4.56M in annual commission revenue. By introducing asynchronous AML execution, batched job processing, and multi-instance-safe orchestration, I ensured predictable scaling to ~500 RPS peak. I increased payment conversion from 64% to 89% and eliminated a double-payment race condition that had been causing ~$146K in monthly financial losses.
My focus is ownership of complex financial and crypto flows: building resilient architectures, optimizing transaction pipelines, and ensuring system stability under high load. I am interested in roles where backend engineering directly impacts business metrics and system performance.
I would welcome the opportunity to contribute as a senior engineer who can deliver independently and take responsibility for critical systems.
#fulltime #parttime #remote #relocation
Specialization: #java #spring #fintech #highload #backend
Level: #senior #lead
Languages: English (C1), Russian (Native)
Experience: 6+ years
CV: Link to CV
Hello,
My name is Maksim. I am a Senior Java Backend Engineer with 6+ years of experience building and scaling revenue-critical payment and crypto processing systems in banking and fintech
In my current role, I acted as a technical lead for a team of three engineers, building a QR payment platform from scratch. The system processes 18M+ transactions annually and directly contributes to multi-million annual revenue. I was responsible for core architectural decisions — enforcing idempotent execution, designing rate-limited REST integrations, and implementing end-to-end observability to guarantee financial traceability and production stability under high load.
In parallel, I designed and implemented an ISO 8583-based crypto transaction processing engine, handling message parsing, transaction classification, and routing to external crypto exchange services, processing ~22,000+ operations daily with dynamic configuration via Redis and zero-downtime updates. I also worked on crypto card infrastructure, including card lifecycle operations and integration with core banking systems and external card processors (Visa/Mastercard, HUMO), covering secure PAN handling, transaction flows, and partner-facing APIs .
Additionally, I redesigned and scaled a high-load transfer service generating ~$4.56M in annual commission revenue. By introducing asynchronous AML execution, batched job processing, and multi-instance-safe orchestration, I ensured predictable scaling to ~500 RPS peak. I increased payment conversion from 64% to 89% and eliminated a double-payment race condition that had been causing ~$146K in monthly financial losses.
My focus is ownership of complex financial and crypto flows: building resilient architectures, optimizing transaction pipelines, and ensuring system stability under high load. I am interested in roles where backend engineering directly impacts business metrics and system performance.
I would welcome the opportunity to contribute as a senior engineer who can deliver independently and take responsibility for critical systems.
#fulltime #parttime #remote #relocation
📎 Webpage (not supported)
Status: #резюме #CV #ищуработу #opentowork
Specialization: #java #spring #fintech #highload #backend
Level: #senior #lead
Languages: English (C1), Russian (Native)
Experience: 6+ years
CV: Link to CV
Hello,
My name is Maksim. I am a Senior Java Backend Engineer with 6+ years of experience building and scaling revenue-critical payment and crypto processing systems in banking and fintech
In my current role, I acted as a technical lead for a team of three engineers, building a QR payment platform from scratch. The system processes 18M+ transactions annually and directly contributes to multi-million annual revenue. I was responsible for core architectural decisions — enforcing idempotent execution, designing rate-limited REST integrations, and implementing end-to-end observability to guarantee financial traceability and production stability under high load.
In parallel, I designed and implemented an ISO 8583-based crypto transaction processing engine, handling message parsing, transaction classification, and routing to external crypto exchange services, processing ~22,000+ operations daily with dynamic configuration via Redis and zero-downtime updates. I also worked on crypto card infrastructure, including card lifecycle operations and integration with core banking systems and external card processors (Visa/Mastercard, HUMO), covering secure PAN handling, transaction flows, and partner-facing APIs .
Additionally, I redesigned and scaled a high-load transfer service generating ~$4.56M in annual commission revenue. By introducing asynchronous AML execution, batched job processing, and multi-instance-safe orchestration, I ensured predictable scaling to ~500 RPS peak. I increased payment conversion from 64% to 89% and eliminated a double-payment race condition that had been causing ~$146K in monthly financial losses.
My focus is ownership of complex financial and crypto flows: building resilient architectures, optimizing transaction pipelines, and ensuring system stability under high load. I am interested in roles where backend engineering directly impacts business metrics and system performance.
I would welcome the opportunity to contribute as a senior engineer who can deliver independently and take responsibility for critical systems.
#fulltime #parttime #remote #relocation
Specialization: #java #spring #fintech #highload #backend
Level: #senior #lead
Languages: English (C1), Russian (Native)
Experience: 6+ years
CV: Link to CV
Hello,
My name is Maksim. I am a Senior Java Backend Engineer with 6+ years of experience building and scaling revenue-critical payment and crypto processing systems in banking and fintech
In my current role, I acted as a technical lead for a team of three engineers, building a QR payment platform from scratch. The system processes 18M+ transactions annually and directly contributes to multi-million annual revenue. I was responsible for core architectural decisions — enforcing idempotent execution, designing rate-limited REST integrations, and implementing end-to-end observability to guarantee financial traceability and production stability under high load.
In parallel, I designed and implemented an ISO 8583-based crypto transaction processing engine, handling message parsing, transaction classification, and routing to external crypto exchange services, processing ~22,000+ operations daily with dynamic configuration via Redis and zero-downtime updates. I also worked on crypto card infrastructure, including card lifecycle operations and integration with core banking systems and external card processors (Visa/Mastercard, HUMO), covering secure PAN handling, transaction flows, and partner-facing APIs .
Additionally, I redesigned and scaled a high-load transfer service generating ~$4.56M in annual commission revenue. By introducing asynchronous AML execution, batched job processing, and multi-instance-safe orchestration, I ensured predictable scaling to ~500 RPS peak. I increased payment conversion from 64% to 89% and eliminated a double-payment race condition that had been causing ~$146K in monthly financial losses.
My focus is ownership of complex financial and crypto flows: building resilient architectures, optimizing transaction pipelines, and ensuring system stability under high load. I am interested in roles where backend engineering directly impacts business metrics and system performance.
I would welcome the opportunity to contribute as a senior engineer who can deliver independently and take responsibility for critical systems.
#fulltime #parttime #remote #relocation
📎 Webpage (not supported)
Status: #резюме #CV #ищуработу #opentowork
Specialization: #java #spring #fintech #highload #backend
Level: #senior #lead
Languages: English (C1), Russian (Native)
Experience: 6+ years
CV: Link to CV
Hello,
My name is Maksim. I am a Senior Java Backend Engineer with 6+ years of experience building and scaling revenue-critical payment and crypto processing systems in banking and fintech
In my current role, I acted as a technical lead for a team of three engineers, building a QR payment platform from scratch. The system processes 18M+ transactions annually and directly contributes to multi-million annual revenue. I was responsible for core architectural decisions — enforcing idempotent execution, designing rate-limited REST integrations, and implementing end-to-end observability to guarantee financial traceability and production stability under high load.
In parallel, I designed and implemented an ISO 8583-based crypto transaction processing engine, handling message parsing, transaction classification, and routing to external crypto exchange services, processing ~22,000+ operations daily with dynamic configuration via Redis and zero-downtime updates. I also worked on crypto card infrastructure, including card lifecycle operations and integration with core banking systems and external card processors (Visa/Mastercard, HUMO), covering secure PAN handling, transaction flows, and partner-facing APIs .
Additionally, I redesigned and scaled a high-load transfer service generating ~$4.56M in annual commission revenue. By introducing asynchronous AML execution, batched job processing, and multi-instance-safe orchestration, I ensured predictable scaling to ~500 RPS peak. I increased payment conversion from 64% to 89% and eliminated a double-payment race condition that had been causing ~$146K in monthly financial losses.
My focus is ownership of complex financial and crypto flows: building resilient architectures, optimizing transaction pipelines, and ensuring system stability under high load. I am interested in roles where backend engineering directly impacts business metrics and system performance.
I would welcome the opportunity to contribute as a senior engineer who can deliver independently and take responsibility for critical systems.
#fulltime #parttime #remote #relocation
Specialization: #java #spring #fintech #highload #backend
Level: #senior #lead
Languages: English (C1), Russian (Native)
Experience: 6+ years
CV: Link to CV
Hello,
My name is Maksim. I am a Senior Java Backend Engineer with 6+ years of experience building and scaling revenue-critical payment and crypto processing systems in banking and fintech
In my current role, I acted as a technical lead for a team of three engineers, building a QR payment platform from scratch. The system processes 18M+ transactions annually and directly contributes to multi-million annual revenue. I was responsible for core architectural decisions — enforcing idempotent execution, designing rate-limited REST integrations, and implementing end-to-end observability to guarantee financial traceability and production stability under high load.
In parallel, I designed and implemented an ISO 8583-based crypto transaction processing engine, handling message parsing, transaction classification, and routing to external crypto exchange services, processing ~22,000+ operations daily with dynamic configuration via Redis and zero-downtime updates. I also worked on crypto card infrastructure, including card lifecycle operations and integration with core banking systems and external card processors (Visa/Mastercard, HUMO), covering secure PAN handling, transaction flows, and partner-facing APIs .
Additionally, I redesigned and scaled a high-load transfer service generating ~$4.56M in annual commission revenue. By introducing asynchronous AML execution, batched job processing, and multi-instance-safe orchestration, I ensured predictable scaling to ~500 RPS peak. I increased payment conversion from 64% to 89% and eliminated a double-payment race condition that had been causing ~$146K in monthly financial losses.
My focus is ownership of complex financial and crypto flows: building resilient architectures, optimizing transaction pipelines, and ensuring system stability under high load. I am interested in roles where backend engineering directly impacts business metrics and system performance.
I would welcome the opportunity to contribute as a senior engineer who can deliver independently and take responsibility for critical systems.
#fulltime #parttime #remote #relocation