Senior .NET Developer for Technology Consulting Unit

We’re hiring! Join our fast-growing Technology Consulting Unit, where innovation meets impact. We specialize in delivering on-demand consultancy and DevOps & AI solutions, helping clients solve complex problems in dynamic industries. If you’re passionate about building scalable, high-performance financial software and thrive in a collaborative environment, we’d love to connect.

As a Senior .NET Developer, you’ll lead the design and development of cutting-edge payment solutions that support both global and regional financial ecosystems. You’ll work hands-on with financial protocols and systems like TARGET2, FPS, BACS, CHAPS, and SEPA, contributing directly to the evolution of modern payment infrastructure.

What You Will Do

• Design and develop backend services and integrations using .NET Core (C#).
• Implement and validate ISO 20022 and SWIFT MT/MX payment message formats.
• Integrate with banks and PSPs using REST/SOAP APIs, SFTP, and custom file-based interfaces.
• Model and maintain payment workflows including SEPA SCT/INST/SDD, FPS, BACS, etc.
• Perform functional and non-functional testing of payment systems.
• Write clear, maintainable technical documentation (specs, configs, troubleshooting guides).
• Collaborate with cross-functional teams including DevOps, QA, and client stakeholders.
  
  

What We Expect From You

• 5+ years of experience with .NET / C#, including ASP.NET Core and background services.
• Hands-on experience implementing SEPA SCT/SDD/INST, SWIFT MT/MX, and related flows.
• Strong understanding of payment message formats, XML/XSD, and reconciliation processes.
• Solid experience with API integration, custom interface design, and working with banking platforms.
• Excellent documentation and troubleshooting skills.
  
  

Nice to have:

• Familiarity with ISO 20022 transformations and validation tools.
• Awareness of GDPR, PCI-DSS, and secure development best practices.
• Experience with cloud-based deployments (Azure, AWS).
  
  

What You Will Get

• Hybrid work. Prefer working remotely? Want to hop into our Vilnius (HQ) or Kaunas (Hub) offices? The choice is yours! Your pet is also welcome!
• Learning budget. Invest in your growth – whether it is a local or abroad course, training or conference – with a yearly budget that equals 50% of your monthly salary (Net).
• Expertise Culture. Through our technology guilds, we foster continuous learning, collaboration, and expertise as a platform for knowledge sharing, skill development, and staying updated with industry trends.
• Well-being. Access our internal and external events for your better general well-being through emotional, physical, financial and personal wellness. Plus, get private health insurance.
• Referral program. Have talented friends? Refer them to us and earn a bonus for every successful referral you bring aboard.
• Paid higher education leave. Take paid time off for your exam or thesis writing. We know it can be a hassle to combine your studies and career.
• Fun. Join our team buildings or mingle at traditional BA parties. We challenge ourselves with various activities from trivia to wall climbing, from badminton to paddle board, etc.
• Monthly salary 3600 - 5600 Euros (Gross). Have different expectations? We are open to considering your compensation based on your skills and experience.
  
  

A Workplace for Everyone - We Value Diversity

At Baltic Amadeus, we respect differences and are building a team where everyone feels like they truly belong. We know that unique backgrounds and fresh perspectives fuel creativity, spark innovation, and make our culture even richer. We ensure that all applicants are evaluated equally regardless of their race, nationality, ethnicity, religion or belief, age, sex, gender identity, sexual orientation, disability, or any other protected characteristic. We are committed to building an environment where everyone feels respected, valued, and empowered to bring their true selves.

Ready to make an impact? Let’s do it together at BA!