Freelance Senior (.NET) Software Engineer (B2B Contract)

Job Description

• Location: Vilnius, Lithuania — preferably hybrid, or remote within the EU / UK Contract period: 1 October 2026 – 31 December 2026 About the Role We are looking for an experienced .NET Software Engineer to join a mature, highly skilled squad working on a modern, distributed banking platform. You will contribute to the design and development of a scalable, reliable, and secure solution built around native AWS services and high-criticality data pipelines. Key Responsibilities Design and develop robust enterprise applications using .NET 10. Build modern, distributed solutions leveraging native AWS services. Develop highly scalable and reliable solutions for high-criticality data pipelines. Contribute to maintaining high standards of software quality, performance, and security. Investigate and resolve incidents, bugs, and production issues. Work effectively within a self-organizing Scrum team and contribute to an agile way of working. Create and maintain comprehensive technical documentation where required. Collaborate closely with software architects, engineers, business analysts, and other stakeholders. Contribute to the development of a modern, robust, and secure banking platform. Stay current with emerging technologies and contribute to continuous technical improvement. Requirements 3–5+ years of professional experience developing and delivering robust enterprise products or applications. Strong experience with .NET 10 / C#. Thorough understanding of cloud technologies, particularly AWS, including services such as: AWS Lambda Amazon S3 Amazon SQS AWS Step Functions Amazon DynamoDB and other native AWS services. Experience with GitHub Enterprise. Hands-on experience with CI/CD automation. Experience with Infrastructure as Code (IaC), particularly Terraform. Experience working in Agile / Scrum environments. Bachelor's degree or higher in Engineering, Computer Science, or a related field. Upper-Intermediate English (B2+), both written and spoken. Nice to Have Experience with enterprise-grade data platforms, particularly Databricks. Experience with message streaming / queueing platforms such as Apache Kafka. Experience working with distributed systems and high-volume data processing. Previous experience in banking or other highly regulated environments. What You Can Expect Work alongside a mature team of highly skilled technology professionals. Opportunity to work with modern .NET and AWS technologies. Exposure to distributed systems and high-criticality data platforms. A self-organizing Scrum environment with a strong engineering culture. Collaboration with experienced architects, engineers, and business analysts. Opportunity to contribute to a modern banking platform where reliability, security, and scalability are critical.
• €50 - €60 an hour
• We may use artificial intelligence (AI) tools to support parts of the hiring process, such as reviewing applications, analyzing resumes, or assessing responses and identifying potential inconsistencies or verification signals in application materials based on available information. These tools assist our recruitment team but do not replace human judgment. Final hiring decisions are ultimately made by humans. If you would like more information about how your data is processed, please contact us.
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