TRAKD
Senior .NET Engineer (AI focused)
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Senior.NET Engineer – AI Acceleration (Contract)
Location: 1 Day per week in London
Contract: 6 months
Rate: £450-£550 | IR35: Outside | Start: 4 weeks
About the role
Our client, a leading UK fintech, is looking for a senior.NET engineer with deep experience in AI agents and AI tooling.
You'll spend the first half of the contract in their AI Acceleration squad, building agents, AI integrations, and the tooling that makes their engineers faster. In the second half, you may move partly or fully into their product squads, doing hands-on C# and .NET development with AI-assisted ways of working.
The ideal person is a strong AI and agent builder with a solid.NET background, rather than a data scientist or machine learning researcher.
What you'll deliver
- Three automation agents for the Onboarding and Transaction Operations teams, built, deployed, and supported in production.
- The coding harness: contributions to the internal setup for AI-assisted development (agent instruction files, skills, tools, and integrations).
- A "second brain": indexing the codebase and business knowledge so AI tools can use it, improving speed and quality across engineering.
- AI adoption: helping engineering teams adopt approved AI tools and AI-assisted ways of working.
- Product features: hands-on .NET delivery in product squads during the second half of the contract.
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What you'll do
AI Acceleration (first half)
- Design, build, integrate, and support AI-enabled tools, services, automations, and agents.
- Build integrations between AI platforms, internal systems, and enterprise tools.
- Take AI pilots and proofs of concept through to production-ready solutions.
- Create reusable patterns, components, and foundations for future AI work.
- Help engineers adopt approved AI tools through enablement, documentation, and knowledge sharing.
- Contribute to AI governance, security, operational readiness, and platform standards.
Product Engineering (second half)
- Design, build, test, and support features across product and platform domains.
- Build and maintain APIs, integrations, data services, and cloud-native applications.
- Contribute to architecture, technical design, code reviews, and continuous improvement.
- Support reliability, observability, and automation work.
- Work with product, engineering, and business stakeholders to deliver agreed outcomes.
Priorities may change as the business learns, and moves between squads depend on business needs.
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Essential skills
- Strong commercial experience building and shipping production systems.
- C# and .NET development.
- Azure cloud services and cloud-native application development.
- REST APIs and distributed systems.
- SQL Server and relational database design.
- Modern CI/CD, GitHub workflows, pull requests, and GitHub Actions.
- Automated testing and software quality practices.
- Agile delivery in cross-functional teams.
What will make you stand out
- Building AI-enabled applications, agents, and automated workflows, ideally in production.
- Agent and orchestration frameworks such as Semantic Kernel, Microsoft Agent Framework, or LangGraph.
- Coding harness internals: agent instruction files, skills, and custom tools for Claude Code, GitHub Copilot, or similar.
- MCP servers, API integrations, and connecting AI to enterprise systems.
- Code indexing, retrieval (RAG), or knowledge-base work.
- Prompt engineering and AI-assisted delivery practices.
- Observability, monitoring, and operational excellence.
- Financial services or other regulated industry experience.
- A grounding in AI fundamentals such as transformers and attention.
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