Senior AI Engineer - Applied

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PhysicsX
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AI Infrastructure

Agentic Frameworks

Tech Stack

About the Role

Senior AI Engineer - Applied at PhysicsX

Location: London (Hybrid — Shoreditch office + remote)
Seniority: Senior
Employment Type: Full-time
Visa Sponsorship: Available

About PhysicsX
PhysicsX is a deep-tech firm combining physics expertise with Formula One engineering heritage, building AI-driven simulation software for engineering and manufacturing across Aerospace, Defense, Materials, Energy, Semiconductors, and Automotive sectors.

About the Role
We're looking for a Senior AI Engineer (Applied) to build the AI agents that transform Engineering workflows across industries such as Manufacturing, Aerospace, and Semi-conductor. This role focuses on orchestrating LLMs and tools to solve complex reasoning problems for domain experts.

Key Responsibilities:

  • Be an expert in building and orchestrating AI Agents. You know how to chain LLMs, tools, and data to solve complex reasoning tasks.
  • Serve as internal power-user ("Customer Zero") to validate developer experience.
  • Design complex agents leveraging surrogates and simulation tools.
  • Implement rigorous evaluation loops and tracing to ensure reliability.
  • Drive platform strategy by identifying generalizable patterns.

Required Qualifications:

  • 3+ years in Applied AI, ML Engineering, or Software Engineering.
  • Proven experience building and deploying AI Agents or complex LLM workflows in production.
  • Demonstrated collaboration with domain experts on specialized problems.

Tech Stack:

  • Languages: Python (primary), Go or TypeScript (secondary)
  • Agentic Frameworks: LangGraph, LangChain, PydanticAI
  • Vector DBs: Pinecone, Weaviate
  • Platform Tooling: Kubernetes, Docker, Terraform
  • Observability: OpenTelemetry, agent tracing/evaluation tools (LangSmith)

Benefits:

  • Equity options
  • 10% employer pension contribution
  • Free office lunches
  • Enhanced parental leave (3 months paternity / 6 months maternity at full pay)
  • 25 days annual leave plus public holidays
  • Private medical insurance (100% employee coverage)
  • Wellhub subscription, eye tests, personal development support
  • Bike2Work scheme and season ticket loans
  • EAP and mental health support
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