Senior .Net Back-end Developer

Are you looking for a challenging project to improve your coding skills? Don’t see any growth possibilities at your current position? Wirex has an opening exactly for you!  
We are looking for an experienced Senior .Net Back-end Developer to build our cutting edge fintech project. Join our team right now to change the way people think about money. 

Who we are: 
At Wirex, we believe everyone should have access to the benefits of digital currency. We were the first to launch a crypto-enabled debit card, and we’re still ahead of the game – offering intuitive, secure ways to buy, exchange and spend crypto.

We must be doing something right, because more than 6 million people across 130 countries are helping to change the world by using Wirex.   

Help us shape the future of digital finance!  
Type of Cooperation: B2B Contract.    
Location: Full remote (EU preferred, no sanctioned countries).    
 

As a team member you'll be involved in: 
— Design and implement event-driven and microservice-based architectures using modern .NET technologies.
— Build and maintain RESTful APIs and background services supporting real-time financial operations.
— Collaborate in Agile ceremonies (grooming, planning, estimation, retrospectives) with product, QA, and DevOps.
— Take ownership of features from concept to production—including architecture, testing, and monitoring.
— Proactively refactor legacy components and evolve platform architecture to meet current scalability, security, and maintainability standards.
— Translate product and compliance requirements into robust unit, integration, and end-to-end test coverage.
— Contribute to code reviews, CI/CD workflows, documentation, and team knowledge sharing. 

Requirements:
— 4+ years of commercial experience with .NET/C# in production systems.
— Hands-on with .NET Core 3.1+ / .NET 6+, ASP.NET Core Web API, and background services.
— Expertise in distributed systems, event-driven architecture.
— Practical understanding of multithreading, async/await, and building resilient, high-load systems.
— Experience working with MSSQL, Redis, knowledge of data caching, transactions, and query optimization.
— Knowledge of message orchestration patterns (saga, idempotency, DLQ).
— Maintains SOLID principles, clean code, design patterns.
—Good English for documentation, Ukrainian or Russian communication skills. 

Will be a plus:
— Experience deploying and running services in a cloud environment, familiarity with containerization (Docker) and CI/CD pipelines.
— Experience with Azure services (e.g., Azure Functions, Service Bus, Cosmos DB, Key Vault, etc.)
— Familiarity with Kafka/Azure EventHubs, gRPC, or Message Queues (RabbitMQ, Azure Service Bus).
— Experience with observability and monitoring (App Insights, Prometheus, OpenTelemetry). 

Benefit: 
— Premium tariffs for our product.
— Semi-remote work with flexible hours.
— Home office allowance.
— Virtual share options scheme after the probation period.
— Comprehensive medical insurance after the probation period.
— Generous vacation policy: 20 business days of paid leave + 12 paid floating holidays.
— Paid sick leave, Birthday, and Anniversary leave.
— Length of Service Holidays.
— Engaging in online events for learning and enjoyment.
— Coworking with all facilities and parking compensation in Wrocław/Kyiv. 

NOTE: Benefits may vary from region-to-region and will depend upon the location you are hired in.