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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