Senior .NET Backend Developer

Quick Facts

• Role: Backend .NET developer supporting and expanding BLIK services

• Collaboration: cross-functional agile team (2-week sprints)

• Work mode: hybrid (2–3 days in the office per month; Łódź or Warsaw)

Description

You’ll work on designing and implementing Microsoft-based backend systems to maintain existing services and develop new ones. The role emphasizes high-quality delivery through automated unit and end-to-end tests, and close collaboration with business users to gather and analyze requirements. You’ll also review technical specifications and help create project documentation, while building experience in containerization and DevOps.

Responsibilities

• Conduct design and implementation work for Microsoft-technology-based IT systems

• Ensure quality by writing automated unit and end-to-end tests

• Collaborate with business users to collect and analyze requirements for new solutions

• Support review of technical specifications and creation of project documentation

Requirements

• At least 5 years of backend development experience in C# with MS SQL

• Knowledge of .NET 8.0, Entity Framework, and Web API

• Experience with Visual Studio, Git, and Postman or Insomnia

• Knowledge of Kubernetes (K8s), Docker, and Azure DevOps

• Knowledge of Jira, Confluence, Bitbucket, Jenkins, TeamCity, and SonarQube

• Knowledge of Kafka, IBM MQ, KeyDB or Redis, and SSIS

• Ability to build automated unit and end-to-end tests

• Independent, goal-oriented, and consistent execution of assigned tasks

• Strong organization and ability to work in a team

• Ability to learn quickly

• Strong communication skills and inquisitiveness when collaborating with business clients and external suppliers

Benefits

• Comprehensive benefits package, including medical care (LuxMed), vacation and holiday co-financing, ZFŚS, and life insurance

• Support for health-related activities for people with a disability certificate

• Individual development plans and strengths discovery using the Gallup approach

• Free access to Legimi, LinkedIn Learning, and a language platform

• Programs supporting employee well-being and psychological support

• Support for parents returning from parental leave

• Active social engagement (WOŚP) through employee teams