Fullstack .NET Developer (Backend)

About the role

Sunmait Technologies is seeking a skilled .NET Developer to join its international team. You will work on a high‑performance platform that modernises capital markets, enabling digital securities trading within a secure, scalable infrastructure.

Key responsibilities

• Write clean, efficient, scalable, and reusable code.
• Develop new features and microservices.
• Integrate third‑party financial services such as Drivewealth.
• Write unit tests and ensure code quality for yourself and the team.
• Contribute to architecture, database design, and API decisions.
• Collaborate with product managers to define and scope new features.
• Work with QA to deliver cohesive, high‑quality solutions.
• Evaluate and recommend technologies to improve the platform.
• Produce thorough documentation and participate in code reviews.

Required profile

• Strong experience with C# and .NET 6+ (preferably .NET 8) and ASP.NET Core.
• Solid understanding of backend principles: REST APIs, microservices, async communication.
• Experience with PostgreSQL or SQL Server, writing efficient SQL and managing indexes.
• Hands‑on experience with Entity Framework Core.
• Familiarity with message brokers such as NATS, Kafka, or RabbitMQ.
• Knowledge of distributed‑system concepts like idempotency, retries, and fault tolerance.
• Experience with Docker and CI/CD pipelines.
• Proficiency in writing unit tests (e.g., xUnit).
• Intermediate or higher English proficiency.
• Fintech or trading domain experience is a plus.

Required skills

• C#
• .NET 6/8
• ASP.NET Core
• gRPC
• Entity Framework Core
• PostgreSQL
• SQL Server
• Redis
• NATS
• Kafka
• RabbitMQ
• Docker
• CI/CD
• xUnit
• React
• TypeScript
• Redux
• OpenTelemetry
• DataDog

What we offer

• Work in a modern, fast‑growing international IT company.
• Large‑scale projects using the latest technologies.
• Loyal management with minimal bureaucracy.
• Competitive salary linked to USD.
• Flexible working hours.
• Transparent professional growth and development path.
• Opportunities to participate in additional company activities.