Senior Machine Learning Engineer

Senior Machine Learning Engineer

London or Paris

Remote/Hybrid will be considered with frequent travel to the office

Vertex Search is proud to partner with a cutting-edge, agile start-up that has plans to double in size in 2026! They are already revenue-generating and have created unique, bespoke AI solutions that produce double the accuracy of traditional LLMs.

As a Senior Machine Learning Engineer, you'll sit at the intersection of machine learning, product, and engineering, working closely with a world-class research team to turn advanced ML capabilities into a coherent, high-impact agent used on real-world problems. More specifically, you'll build the intelligence layer of their highly advanced agentic AI agent.

You’ll help design:

• The iterative interaction between the Agent and users
• The ML logic and decision workflows powering the Agent
• Reusable predictive pipelines that generalise across datasets
• Robust evaluation and model comparison frameworks

This is a high-ownership role where you’ll shape core product architecture in a fast-moving environment.

What You’ll Be Doing

• Designing end-to-end predictive pipelines (data → model → evaluation)
• Implementing decision logic that guides and automates parts of the ML workflow
• Turning complex ML processes into reusable, scalable abstractions
• Integrating advanced research outputs into production workflows
• Writing clean, modular, production-grade Python code
• Collaborating closely with research, product, and engineering

What We’re Looking For

• Around 7+ years in ML Engineering or applied ML roles
• Strong experience building end-to-end ML systems used in production
• Deep expertise in working with agentic agents (experience in synthetic data, tabular data, or similar fields is a plus!)
• Excellent ML fundamentals and ability to reason about trade-offs
• Strong Python and production-quality coding practices

Benefits

• Highly competitive salary
• Generous equity
• 35 days paid vacation
• Private healthcare