Senior .NET Engineer

Salary range: B2B - 39-40 E/h + VAT 💰 Ciklum is looking for a Senior .NET Engineer to join our team full-time in Poland.We are a custom product engineering company that supports both multinational organizations and scaling startups to solve their most complex business challenges. With a global team of over 4,000 highly skilled developers, consultants, analysts and product owners, we engineer technology that redefines industries and shapes the way people live. About the role: As a Senior .NET Engineer, become a part of a cross-functional development team engineering experiences of tomorrow. Project Description: Modernizing Legacy application. Responsibilities: • Analyze existing stored procedures and document business logic • Design clean, testable .NET data access interfaces • Write unit/integration tests prior to implementation • Execute incremental migration with parallel validation • Ensure performance parity with legacy procedures Requirements: • C#/.NET - Strong experience building data access layers, repositories, and ORM implementations • SQL Server/T-SQL - Ability to analyze and deconstruct complex stored procedures • MongoDB - Experience with NoSQL patterns for potential hybrid data solutions • TDD/Unit Testing - Proven track record writing comprehensive test suites before implementation • Python - For scripting, automation, and migration tooling • LLM/AI Tools - Experience leveraging AI for code analysis, conversion assistance, and documentation generation • Kafka - Understanding of event-driven architectures for data synchronization • Spring Boot - Familiarity with enterprise patterns (transferable to .NET architecture) What`s in it for you? • Strong community: Work alongside top professionals in a friendly, open-door environment • Growth focus: Take on large-scale projects with a global impact and expand your expertise • Tailored learning: Boost your skills with internal events (meetups, conferences, workshops), Udemy access, language courses, and company-paid certifications • Endless opportunities: Explore diverse domains through internal mobility, finding the best fit to gain hands-on experience with cutting-edge technologies • Flexibility: Enjoy flexibility – full remote working possibilities • Care: We’ve got you covered with company-paid medical insurance, mental health support, and financial & legal consultations About us: At Ciklum, we are always exploring innovations, empowering each other to achieve more, and engineering solutions that matter. With us, you’ll work with cutting-edge technologies, contribute to impactful projects, and be part of a One Team culture that values collaboration and progress. With delivery centers in Wrocław and Gdańsk, our 300+ professionals in Poland drive forward-thinking solutions for global clients. Join a community where collaboration sparks innovation—and your impact reaches millions. Want to learn more about us? Follow us on Instagram, Facebook, LinkedIn. Explore, empower, engineer with Ciklum! Interested already? We would love to get to know you! Submit your application. We can’t wait to see you at Ciklum.