Senior Full Stack Engineer (C# / .NET)

Location: Hybrid, three days per week in Belfast city centre, UK

Salary: £50,000–£60,000 per year plus a 10% performance bonus.

Company

A world-leading technology organisation operating across 27 countries with more than 5,200 employees, building a new product through a self-directed Belfast engineering team.

What you will do

• Design, build, and maintain scalable full stack applications using modern cloud technologies.
• Own features end to end, from design through production.
• Build microservices and API integrations supported by CI/CD and automated testing.
• Contribute to architecture decisions and resolve complex production issues.
• Mentor junior engineers and collaborate with product owners, architects, and business analysts.

Requirements

• Extensive commercial full stack experience in enterprise environments, with a backend focus.
• Strong modern C# and ASP.NET experience, including Entity Framework.
• Working experience with React, HTML5, CSS3, and JavaScript or TypeScript.
• Experience with RESTful APIs, GraphQL, and WebSockets.
• Experience with AWS, Docker, and Kubernetes.
• Experience with CI/CD, automated testing, and relational databases such as PostgreSQL or SQL Server.
• Agile team experience and the ability to work through ambiguity with product owners and business analysts.

Culture & Benefits

• Greenfield product development with startup pace, ownership, and the backing of a global organisation.
• AI-assisted coding and opportunities to influence how the product is built.
• Hybrid work with three days per week in a new Belfast city centre office.
• Career progression toward lead and team lead roles.
• Performance bonus of 10%.

Hiring process

• The interview focuses on problem-solving and how candidates think rather than language trivia.
• Apply by contacting Nick Napier directly on LinkedIn or submitting a CV through the application link.