**⚡️Senior .NET Back-end Developer | FinTech
Remote **
*Except Russia & Belarus

B2B Contract
We’re looking for an experienced Senior .NET Back-end Engineer to join a global FinTech product team building high-load payment systems and secure digital asset infrastructure.
Hands-on FinTech experience is required.

You will be involved in:
• Designing and implementing event-driven and microservice architectures
• Building RESTful APIs and background services for real-time financial operations
• Participating in Agile ceremonies with product, QA, and DevOps teams
• Owning features end-to-end: architecture → development → testing → monitoring
• Refactoring and evolving legacy components for scalability and security
• Translating product & compliance requirements into strong test coverage
• Contributing to code reviews, CI/CD, and documentation

Requirements:
• Mandatory experience in FinTech
• 4+ years of commercial experience with .NET/C#
• .NET Core 3.1+ / .NET 6+, ASP.NET Core Web API
• Strong understanding of distributed systems and event-driven architecture
• Multithreading, async/await, high-load system design
• MSSQL, Redis, caching, transactions, query tuning
• Saga, idempotency, DLQ patterns
• SOLID principles, clean code
• English for documentation; Ukrainian/Russian for communication

Nice to Have:
• Docker, CI/CD
• Azure (Functions, Service Bus, Cosmos DB, Key Vault)
• Kafka / RabbitMQ / EventHubs
• App Insights, Prometheus, OpenTelemetry

Contact:
👉 Telegram: @kariecurie

#вакансия #vacancy #job #remote #dotnet #net #backend #fintech

**💥Senior React Native Engineer (Mobile App • iOS/Android) | Fintech Web3

Remote (except Russia and Belarus)**
**B2B
Full-time
**Fintech experience is mandatory

Fintech/Web3 product building a next-gen stablecoin mobile app.
We’re looking for a Senior React Native Engineer to build the mobile app (iOS/Android) from scratch.

What you’ll do

• Architect & develop the mobile app (iOS/Android) in React Native
• Integrate Web3 (wallets, smart contracts, crypto transactions)
• Reuse TS/React logic + create mobile UI/UX
• Collaborate with backend/web/product
• Ensure quality: testing, CI/CD, clean code

Requirements
• 7+ years development experience
• 5+ years React Native + published mobile apps
• Strong TypeScript/JavaScript
• Redux / Zustand
• Fast & clean delivery
• English + Ukrainian/Russian

Nice to have
• Web3 experience
• Crypto wallet or payment app development
• Smart contract basics

👉🏻Contact: @kariecurie

#вакансия #vacancy #remote #reactnative #mobileapp #ios #android #mobile #fintech #web3 #crypto #typescript #javascript #developer