Senior Machine Learning Engineer – Agentic AI Platform
Central Cambridge (Hybrid working)
Permanent role
In partnership with Robert Half Limited
The Opportunity
A global SaaS organisation is building a cutting-edge, multi-agent AI platform designed to transform how enterprise clients interact with complex data.
Developed in-house, this strategic platform is now entering a pivotal hardening and MVP phase. We are seeking a Senior Machine Learning Engineer to work alongside the AI Platform Lead to scale the architecture, strengthen reliability, and drive engineering excellence as the system moves toward global production.
This is a hands-on, high-impact role focused on delivery, robustness, and refining a sophisticated graph-based agent engine.
What You'll Be Working On
Agent Orchestration
• Hardening multi-step reasoning workflows
• Scaling graph-based execution logic
• Optimising agent collaboration patterns
Tool Integration
• Benchmarking and fine-tuning integrations within an established agent framework
• Extending bespoke toolchains for enterprise use
Inference & Performance Engineering
• Optimising LLM integration and prompt lifecycle management
• Improving latency, cost efficiency, and model performance
State & Reliability
• Strengthening Redis-backed persistence
• Ensuring consistency across complex, stateful interactions
• Enhancing service reliability at scale
Evaluation & Observability
• Building regression frameworks
• Implementing tracing, monitoring, and enterprise-grade observability
What We're Looking For
• Strong Python engineering experience building production-grade systems
• Hands-on experience with LLM-powered applications and agent orchestration (e.g. LangGraph or similar graph-based frameworks)
• Experience with stateful systems, caching, and reliability engineering
• Proficiency with FastAPI, Docker, and Redis
• Comfortable operating in a small, senior, high-impact engineering team
Why Join?
• Work on a genuinely strategic, next-generation AI platform
• Play a key role in scaling a production-grade agentic AI system
• High ownership and direct influence on architecture decisions
• Hybrid working from Central Cambridge
• Excellent benefits package
• Discretionary performance bonus
APPLY NOW
Important Note:
This is a Cambridge-based UK role. Applicants must have full rights to work in the UK. We are unable to consider fully remote, B2B or B2C contractors.