Senior Software Engineer (Full time perm)

Hybrid, Newcastle (remote considered)

We are looking for a Senior Software Engineer with deep expertise in C#/.NET to drive the evolution of server-side systems within a fast-scaling environment.

You’ll play a pivotal role in shaping the technical foundation of a growing platform, helping move from strong product-market fit into the next phase of growth.

This role goes beyond feature delivery you’ll be instrumental in defining how backend services are built, scaled, and modernised, with a particular focus on extending AI-powered capabilities.

Working at the core of a widely used product, you’ll tackle complex technical challenges while influencing architectural direction across the wider engineering organisation.

What You’ll Do

• Define and evolve server-side architecture and technical direction in line with business and product goals
• Lead development of robust back-end services and APIs using C# and .NET Core/.NET 6+
• Optimise system performance, security, and scalability for a growing user base
• Advise on architectural decisions across microservices, data storage, AI, and integrations
• Collaborate with product teams and stakeholders to shape technical strategy and roadmap
• Lead by example, maintaining high standards for code quality, testing, and performance
• Mentor engineers, supporting growth and continuous improvement
• Influence engineering culture, processes, and technical strategy across the organisation
• Drive improvements in tooling, workflows, and development practices
• Contribute to long-term architectural planning as a subject matter expert

What We’re Looking For

• Back-end development experience with C#/.NET, including work at scale
• Strong understanding of software design patterns, systems architecture, and secure development
• Experience designing APIs with a focus on security and best practices
• Proven experience delivering AI-powered features, including LLM integrations and RAG-based solutions
• Experience integrating AI capabilities into .NET backend systems and RESTful APIs
• Familiarity with CI/CD pipelines, Docker, and cloud infrastructure (Azure experience advantageous)
• Experience working in agile environments with modern DevOps toolchains
• Strong architectural thinking and experience with scalable, component-based systems
• Ability to balance short-term delivery with long-term scalability and maintainability
• Proven ability to mentor and provide technical leadership, particularly in AI-focused engineering