Senior .NET Developer

About Us

At Flat Rock Technology, we build the future!

Whether it’s helping clients grow their teams through staff augmentation, developing software that scales businesses, protecting companies from cyber threats, or managing large operational teams as an extension of each of our wonderful customers, we’re there to empower growth and drive impact.

With offices across the Globe: UK, Europe, South America, Sri Lanka, and the US, we’re a fast-growing global tech and staff augmentation organization delivering cutting-edge software development, data services, and business process outsourcing to clients worldwide.

We believe in innovation, ownership, and growing & developing our people. Your ideas matter here and your work truly makes a difference. Whether we’re engineering powerful software, optimizing operations, or helping customers scale, we move fast, stay curious, and build with purpose.

Join a team that’s collaborative, ambitious, and always pushing for better.

At Flat Rock, we don’t just follow the future – we create it.

Main responsibilities:

• Design, develop, and maintain high-performance .NET applications (C#, .NET Core / .NET 6+).
• Architect and implement AI-enhanced features, including automation, recommendations, and AI/ML service integrations (Azure AI, OpenAI, Cognitive Services).
• Build and consume RESTful APIs and event-driven services interacting with AI models.
• Contribute to system architecture, scalability, and AI-readiness.
• Write clean, maintainable, well-tested code following modern engineering and AI-safe practices.
• Lead code reviews, testing, documentation, and AI governance.
• Collaborate with cross-functional teams to translate business needs into technical and AI solutions.
• Optimize application performance, reliability, security, and AI workloads.
• Troubleshoot full-stack and cloud/AI integration issues.
• Mentor developers and upskill teams in AI-aware development.
• Stay current on .NET, cloud, and AI technologies, recommending improvements and innovations.

Requirements:

• 5+ years in .NET development with C#, ASP.NET Core, and RESTful APIs.
• Cloud integration experience, preferably with Microsoft Azure.
• Strong software design knowledge: architecture, patterns, SOLID, clean code.
• SQL Server and relational database experience.
• AI/ML integration experience (e.g., Azure OpenAI, Cognitive Services, prompt engineering, AI-assisted automation).
• Familiarity with CI/CD, DevOps, and Git workflows.
• Strong analytical, problem-solving, and communication skills.

Preferable skills:

• Hands-on with AI/ML platforms (Azure ML, Semantic Kernel, LangChain, ML.NET).
• Microservices, front-end frameworks (React, Angular, Blazor).
• Containerization and orchestration (Docker, Kubernetes).
• Knowledge of AI security, data privacy, and responsible AI principles.
• Experience building AI-driven products in agile, product-led, or innovation-focused environments.

What we offer in return:

• Competitive salary packages plus a range of region-specific benefits.
• Clear career paths and opportunities for continuous professional development.
• Exciting, meaningful work within a fast-growing international organisation.
• Modern office spaces across the globe.
• A vibrant company culture with regular team events and social activities.
• Entertainment zones, team-building programmes, and local cultural celebrations.
• Hybrid working options – enjoy the flexibility of working from home and the office.
• Additional holiday days added the longer you’re with Flat Rock.

Privacy statement:

If that sounds just like you, apply now by sending your CV in English!

By submitting your application, you agree that FRT will use your personal data for recruitment purposes only. All documents will be treated in the strictest confidentiality.

Only short-listed candidates will be invited for an interview.

We can’t wait to meet you!