Senior Software Engineer, Full Stack - AI in London

Fitch Group is currently seeking a Senior Software Engineer, Full Stack-AI based out of our London or Manchester office. Fitch Group Technology has a number of agile teams that deliver world‑class innovative solutions to Fitch Group internal and external customers. This position will be within one of our agile teams delivering software products for our BMI business.

What We Offer:

In this position, you will have the opportunity to be a part of an exceptionally talented, bright and driven team, and apply your skills in novel ways. Our technology stack is modern - cloud based, containerized, serverless and microservices oriented. You will play a key role in implementing tools and processes that aim to improve the quality of our end‑to‑end code while creating a more efficient and sustainable workflow for our customers. You will work in a hybrid (in‑office / Work from Home) arrangement, in a collaborative and supportive work environment where your ideas and contributions are valued with a focus on achievable improvements that get used every day.

We’ll Count on You To:

• Design and build ML/AI solutions (classical ML + modern deep learning / LLM approaches) aligned to product outcomes.
• Demonstrate proficiency in full‑stack technologies for enterprise‑scale websites and applications.
• Work as part of an agile team in design, development, debugging, and deployment efforts while addressing security, cross‑browser and cross‑platform expectations and concerns.
• Understand the importance of design best practices, provide effective translation to code artifacts and implement appropriate integration approach for API/data layer.
• Partner with Product Owner and stakeholders to understand business needs, define and develop applications/architecture, design, review, implement and optimise Engineering processes.
• Build data expertise and a deep understanding of business domain knowledge and own data quality for allocated areas of ownership.
• Maintain and enhance microservices‑based components for the application suite.
• Recommend, create and maintain development best practices and guidelines to be used across various applications.
• Write automated unit, integration, performance and visual regression test cases.
• Promote, implement, and evolve development best practices especially on commits, versioning and dependency management.

What You Need to Have:

• 7+ years of experience designing and developing distributed application architecture of moderate‑to‑high complexity.
• 5+ years in software engineering or applied ML building real‑world AI/ML systems; strong Python proficiency and backend development expertise.
• Hands‑on experience building GenAI apps with LangChain and LangGraph, including agent design, state/memory management, and graph‑based orchestration.
• Proficiency in ML/NLP and generative models; experience with embeddings, vector stores, RAG, and LLM integration/fine‑tuning (OpenAI, LLaMA, Cohere, etc.).
• Strong coding in Python and experience with frameworks/tools such as FastAPI, PyTorch/TensorFlow, MLflow; 3‑5+ years of experience in designing and developing scalable web applications using modern front‑end frameworks such as React/TypeScript.
• Experience working in high‑performance teams using Agile methodologies.
• Experience with CI/CD concepts and implementing build and deployment pipelines incorporating Security, Automation and Quality (DevSecOps).
• Familiarity with modern data architecture and engineering technologies.
• Excellent communication skills with ability to articulate ideas clearly and concisely.

Why Fitch?

At Fitch Group, the combined power of our global perspectives is what differentiates us. Our global network of colleagues comes together to accomplish things greater than they ever could alone. Every team member is essential to our business and each perspective is critical to our success. We embrace a diverse culture that encourages a free exchange of ideas, guaranteeing your voice will be heard and your work will have an impact, regardless of seniority.

Fitch Group is a global leader in financial information services with operations in more than 30 countries. Wholly owned by the Hearst Corporation, we are comprised of three main businesses: Fitch Ratings | Fitch Solutions | Fitch Learning. Fitch is committed to providing global securities markets with objective, timely, independent and forward‑looking credit opinions. To protect Fitch’s credibility and reputation, our employees must take every precaution to avoid conflicts of interests or any appearance of a conflict of interest. Should you be successful in the recruitment process at Fitch Ratings you will be asked to declare any securities holdings and other potential conflicts prior to commencing employment. If you, or your immediate family, have any holdings that may conflict with your work responsibilities, you may be asked to divest yourself of them before beginning work. Fitch Group is proud to be an Equal Opportunity and Affirmative Action Employer. We evaluate qualified applicants without regard to race, colour, national origin, religion, sex, sexual orientation, gender identity, disability, protected veteran status, and other statuses protected by law.