Senior Software Engineer - AI I

Lead the design and delivery of AI-powered applications using .NET, Azure AI Services, and Azure OpenAI, leveraging Retrieval-Augmented Generation (RAG) and Semantic Kernel for agentic orchestration. Own end-to-end solution quality (performance, security, reliability) and mentor engineers across teams. About the role: In this opportunity as a Senior Software Engineer AI, you will: Architect and build .NET services and APIs integrating Azure OpenAI and Azure AI Services Design and implement RAG pipelines using Azure AI Search for hybrid retrieval and grounding Develop agentic workflows with tool/function calling, planning, memory, and safe execution boundaries Build and manage Semantic Kernel plugins/skills, including planners, connectors, and memory stores Implement observability for AI systems (cost, latency, token usage, quality metrics) using App Insights/OpenTelemetry Ensure end-to-end solution quality: performance, security, reliability, and scalability Collaborate with product, security, and data teams to align with compliance and business goals Drive architecture best practices and engineering excellence across projects Mentor engineers, lead design reviews, and author technical RFCs About you: You're a fit for the role of Senior Software Engineer AI if your background includes: 6+ Years of Experience with .NET technologies C#/.NET & ASP.NET Core: Advanced async, streaming, DI, clean architecture, performance tuning; REST APIs, authentication (OAuth2/OIDC/JWT), caching, resiliency Azure AI & OpenAI: GPT models, embeddings, function calling, streaming responses, cost optimisation Azure AI Search & Studio: Indexing, hybrid search (BM25 + vectors), skillsets, enrichers, re-ranking; prompt flows and evaluation pipelines RAG & Agentic AI: Chunking, metadata enrichment, hybrid retrieval, citation fidelity; multi-tool orchestration, planners, memory, guardrails Semantic Kernel (C#): Kernels, semantic/native skills, connectors, planners, memory stores Azure Infrastructure: App Service, Functions, AKS, Container Apps, API Management, Key Vault Security & Compliance: PII handling, data residency, auditability, threat modelling Testing & Quality: Unit, integration, contract, load testing, CI/CD Nice-to-Have: Cognitive Services (Document Intelligence, Speech, Vision), advanced AI Search (scoring profiles, multi-source ingestion), AI observability (hallucination detection, RAG evaluation), frontend (Blazor/React with streaming UX), knowledge graphs (Neo4j/RDF) #LI-HG1 What’s in it For You? Hybrid Work Model: We’ve adopted a flexible hybrid working environment (2-3 days a week in the office depending on the role) for our office-based roles while delivering a seamless experience that is digitally and physically connected. Flexibility & Work-Life Balance: Flex My Way is a set of supportive workplace policies designed to help manage personal and professional responsibilities, whether caring for family, giving back to the community, or finding time to refresh and reset. This builds upon our flexible work arrangements, including work from anywhere for up to 8 weeks per year, empowering employees to achieve a better work-life balance. Career Development and Growth: By fostering a culture of continuous learning and skill development, we prepare our talent to tackle tomorrow’s challenges and deliver real-world solutions. Our Grow My Way programming and skills-first approach ensures you have the tools and knowledge to grow, lead, and thrive in an AI-enabled future. Industry Competitive Benefits: We offer comprehensive benefit plans to include flexible vacation, two company-wide Mental Health Days off, access to the Headspace app, retirement savings, tuition reimbursement, employee incentive programs, and resources for mental, physical, and financial wellbeing. Culture: Globally recognized, award-winning reputation for inclusion and belonging, flexibility, work-life balance, and more. We live by our values: Obsess over our Customers, Compete to Win, Challenge (Y)our Thinking, Act Fast / Learn Fast, and Stronger Together. Social Impact: Make an impact in your community with our Social Impact Institute. We offer employees two paid volunteer days off annually and opportunities to get involved with pro-bono consulting projects and Environmental, Social, and Governance (ESG) initiatives. Making a Real-World Impact: We are one of the few companies globally that helps its customers pursue justice, truth, and transparency. Together, with the professionals and institutions we serve, we help uphold the rule of law, turn the wheels of commerce, catch bad actors, report the facts, and provide trusted, unbiased information to people all over the world. About Us Thomson Reuters informs the way forward by bringing together the trusted content and technology that people and organizations need to make the right decisions. We serve professionals across legal, tax, accounting, compliance, government, and media. Our products combine highly specialized software and insights to empower professionals with the data, intelligence, and solutions needed to make informed decisions, and to help institutions in their pursuit of justice, truth, and transparency. Reuters, part of Thomson Reuters, is a world leading provider of trusted journalism and news. 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