Engineering & Quality - Software Engineer, Senior in London

Senior Software Engineer, Full Stack - AI

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.

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. And you will have fun doing it! 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.

• 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.
• 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 optimize 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.

• 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.

Fitch Group is a proud Equal Opportunity and affirmative action employer. We evaluate qualified applicants without regard to race, color, national origin, religion, sex, sexual orientation, gender identity, disability, protected veteran status, and other statuses protected by law.