Senior .NET Developer

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

💼 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