Lead .NET Developer - Poland

FDM is a global technology consultancy partnering with leading organisations to deliver cutting-edge IT solutions. We are looking for an experienced Lead .NET Developer to join our client in the financial sector. This is initially a 12-month fixed term contract with the potential to extend and will be a hybrid role based in Warsaw. This is an excellent opportunity to design and develop secure, high-performance applications that support key operations in a global, regulated environment.

As a Lead .NET Developer, you’ll be involved throughout the entire software development lifecycle - from gathering requirements and designing system architecture to implementation, testing and deployment. You’ll work with C#, React, ASP.NET Core, Entity Framework and SQL Server to build scalable web applications and robust backend services. The role may also include API integrations and database performance optimisation, allowing you to enhance your technical expertise further.

Working within Agile teams and following CI/CD practices, you’ll collaborate closely with analysts, testers and other engineers to deliver solutions that meet business objectives. At FDM, you’ll benefit from a supportive culture and a clearly defined development path to strengthen both your technical and leadership skills.

What we expect:

• At least 10 years’ commercial experience in .NET development using C# and React
• Strong knowledge of ASP.NET Core, Entity Framework and SQL Server
• Experience developing RESTful APIs and web-based applications
• A solid understanding of OOP principles, software design patterns and reliability engineering
• Familiarity with Agile methodologies, CI/CD pipelines and version control tools (e.g. Git)

What we offer:

• A clearly defined career path supported by training and certifications
• Opportunities to re-skill and upskill through continuous learning
• Ongoing support from FDM teams and client-side mentors
• Real-world project experience and access to a global professional network
• Benefits including insurance, private medical care, well-being support, sports card and training courses

FDM is an award-winning global talent network. We power the people behind technology and innovation, providing determined, ambitious individuals with the tools they need to succeed in one of the fastest-growing and most challenging industries. Through industry-recognised training, personalised 1-to-1 mentoring, upskilling in essential tech, and assignments with world-leading companies, we support you in achieving the future you want.

Since our launch, we have helped over 25,000 people start their careers and now employ 2,500 professionals from over 80 countries, partnering with 300+ companies globally. FDM Group is an Equal Opportunity Employer, committed to diversity and ensuring everyone can thrive, regardless of gender, ethnicity, social mobility, age, abilities, neurodiversity, sexuality, or caring responsibilities.