Senior .NET Developer

At GBL Tech, we drive high-impact technology careers through specialization and scale. We operate across critical digital ecosystems — from Fintech to Smart Industry — connecting talent with technically challenging projects and modern stacks.

The Role

We're looking for a Senior .NET Developer with extensive experience in software engineering, API design, and asynchronous messaging to contribute to the development of robust, scalable enterprise applications. This role is suited for a highly experienced professional who can take ownership of technical solutions, design reliable integrations, and apply sound engineering principles across complex systems.

Your Mission:

Software Engineering: Design, develop, and maintain enterprise applications using .NET , ensuring high standards of code quality, performance, and maintainability.

API Design & Documentation: Design and document REST APIs , using OpenAPI/Swagger to ensure clear specifications and consistent integration practices.

Messaging & Integration: Build reliable asynchronous communication mechanisms using RabbitMQ and Rebus , supporting efficient interactions between distributed application components.

Database Development: Work with SQL Server to develop and optimise data access, queries, and database operations.

Architecture & Scalability: Contribute to the design of distributed solutions and microservices , promoting robust integration patterns and reliable application behaviour.

Quality & Delivery: Support automated testing, API validation, and continuous delivery practices, collaborating with development teams to improve software quality and deployment processes.

What We Are Looking For:

.NET Expertise: Extensive professional experience in .NET development, with a strong track record in designing and delivering complex software solutions.

Messaging Technologies: Relevant hands-on experience with RabbitMQ and Rebus , with knowledge of asynchronous messaging and distributed systems.

API Development: Strong experience designing and documenting REST APIs , with familiarity with OpenAPI/Swagger and tools such as Postman or Insomnia .

Database Skills: Solid knowledge of SQL Server and relational database concepts.

Security & Integration: Familiarity with authentication and authorisation technologies such as Keycloak, OIDC, and JWT will be valued.

Engineering Practices: Experience with microservices , CI/CD , and Agile methodologies is an advantage, as are Azure certifications and exposure to financial services, payments, or regulated environments.

Interested?

If this project speaks to you, or you're looking for a similar challenge, we'd love to hear from you.