.NET developer

Location: Lithuania Start date: ASAP Duration: 12 months Seniority: Senior Role Overview: We are seeking an experienced .NET Developer to join a fintech engineering team. The position requires deep knowledge of banking standards (ISO 20022), real-time payment solutions, and strong .NET expertise. Knowledge of UK payment regulations is highly preferred. Key Requirements: 6+ years of experience with C# and .NET (Core/6/7/8) Advanced knowledge of ISO 20022 and SEPA payment formats Hands-on experience with SWIFT, FPS, BACS, CHAPS, TARGET2 Familiarity with APIs for PayPal and Banking Circle Proficient with REST, SOAP, SFTP, XML/JSON Secure coding expertise, SQL Server, message queues, Docker Excellent communication skills in English Experience with UK payment regulations is highly preferred Experience with Open Banking is a must Nice to Have: Background in core banking systems or digital wallets Experience with cut-off times, clearing, and settlement processes Responsibilities: Develop and maintain backend payment processing services using .NET Core (C#) Process ISO 20022 (pain.001, camt.053) and SWIFT MT/MX payments Integrate with various bank APIs and file-based communication channels Oversee the full lifecycle of paymentsfrom initiation to reconciliation Ensure compliance, robust error handling, and auditing Collaborate with cross-functional teams to deliver secure, scalable platforms Maintain technical documentation and implement new payment integrations Participate in code reviews, testing, and CI/CD pipelines