Senior .NET Developer (Fintech)

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Senior .NET Developer at Elinext
Location: Poland or EU
Experience: 3–5 years
Format: Remote / office in Warsaw / hybrid
 
Elinext is an international IT company specializing in software development and integration for customers worldwide. We help businesses build reliable, scalable, and modern digital solutions across a wide range of industries.
 
We are looking for a Senior .NET Developer to join a long-term project in the financial services / receivables management domain. The product is focused on debt collection and debt management services, supporting processes related to consumer debt, mortgage-backed debt, and corporate debt.
In this role, you will work on backend solutions in a complex business environment, contributing to the design and development of scalable distributed systems and business-critical services.
 
✅Responsibilities
- Design and develop backend services using C# / .NET
- Build and maintain REST APIs with ASP.NET Core
- Apply Domain-Driven Design (DDD) principles, including bounded contexts and ubiquitous language
- Design and develop microservices, ensuring service autonomy and proper inter-service dependency management
- Work with event-driven architecture, including event production, consumption, and eventual consistency patterns
- Implement messaging solutions with RabbitMQ, including exchange / queue configuration, publish-subscribe patterns, retries, and dead-letter handling
- Contribute to system reliability, maintainability, and performance in a distributed environment
- Collaborate with the team on architecture, technical design, and implementation decisions

✅Requirements
- 3–5+ years of commercial experience in .NET development
- Strong knowledge of C# / .NET
- Hands-on experience with ASP.NET Core and REST API development
- Good understanding of Domain-Driven Design (DDD)
- Experience with microservices architecture
- Experience with event-driven systems
- Strong practical knowledge of RabbitMQ
- Ability to work with distributed systems and solve complex backend challenges
- Good communication skills and a proactive engineering mindset
- English B2

💼 What We Offer
- Small-company feel within a fast-growing international environment
- Friendly, collaborative, and mission-driven team
- Health & retirement benefits
- Vacation plus 5 additional paid sick days
- Medical insurance
- Discounts in various establishments depending on the country
- Monetary bonuses for important life events
- Long-service benefits, including additional vacation days and other perks
- Corporate events and team-building activities
- Corporate English courses
- Support with professional certifications and reimbursement for professional courses and training