Senior Machine Learning Engineer

Staff ML Engineer | Agentic AI / LLMs / NLP / Python | FinTech | London (Hybrid) | £150K + Equity

Company: FinTech Startup

Salary: up to 150K

Location: London

A high-growth FinTech startup is building greenfield AI products from the ground up and looking to hire a Staff ML Engineer to lead the architecture and development of next-generation intelligent systems.

This is not a traditional modelling role. Instead of focusing on a single predictive model, you’ll be designing and scaling systems of models that can:

• Search and retrieve relevant information

• Analyse complex financial data

• Generate outputs such as reports and credit memos

• Validate, verify, and improve model outputs in production

As a Staff ML Engineer, you’ll take ownership of designing and optimising these systems by combining:

• Large Language Models (LLMs)

• Classical machine learning

• Rule-based systems

• Workflow orchestration / agentic architectures

What you’ll be doing:

• Leading technical direction for ML and AI systems across the business

• Architecting production-grade LLM applications, RAG pipelines, and evaluation frameworks

• Driving best practices across experimentation, deployment, and monitoring

• Partnering with engineering, product, and leadership to shape AI strategy

• Mentoring engineers and influencing technical standards across teams

What we’re looking for:

• 6+ years in Machine Learning, Applied AI, or Data Science

• Strong Python skills and experience with frameworks such as PyTorch and scikit-learn

• Deep experience in either Classical ML, NLP, or LLM-powered systems

• Experience building and deploying production ML systems at scale

• Strong understanding of data pipelines, model deployment, and working with messy real-world datasets

• Background in Financial Services or highly regulated environments is a plus

London, UK (Hybrid)

£150,000 + Equity

Staff ML Engineer | Agentic AI / LLMs / NLP / Python | FinTech | London (Hybrid) | £150K + Equity