Freelance Senior .NET Developer / Tech Lead

Project/Client: Fintech

Location: Lithuania

**Start Date:**ASAP

Duration: 12 months

**Language:**English

Role Overview:

We’re looking for a Senior .NET Developer / Tech Lead to join our engineering team and build payment-focused backend solutions in a regulated fintech environment. This is a hands-on role combining software development with technical leadership. You’ll design and develop backend services, contribute to technical and architectural decisions, and help the team maintain high engineering standards.

Key Responsibilities:

- Design and develop backend services using C# / modern .NET

- Contribute to technical design and architectural decisions

- Build integrations with REST APIs, third-party platforms, messaging, and file-based interfaces

- Ensure code quality through code reviews and engineering best practices

- Mentor developers and lead technical discussions

- Work with SQL, relational databases, CI/CD, and Docker

- Build secure, reliable, and scalable software solutions

- Collaborate with product, compliance, QA, and other engineering teams

Must-Have Requirements:

- 7+ years of hands-on C# / .NET experience

- Strong backend development experience

- Experience with REST APIs, integrations, and distributed systems

- Strong SQL and relational database experience

- Experience with Docker and CI/CD

- Understanding of secure and reliable software development

- Experience as a Senior Engineer, Tech Lead, or similar

- Ability to take technical ownership and guide other developers

Nice to Have:

- Experience in payments, banking, fintech, or financial services

- Experience in a regulated / compliance-driven environment

- Knowledge of ISO 20022 / SEPA

- Understanding of clearing, settlement, or payment processing

- Experience with Azure or AWS

Originally posted on Himalayas