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Showing 7 jobs

Security Lead - Member of Technical Staff

Callosum
London

Callosum is seeking a Security Lead to own the design and assurance of security across their full-stack AI infrastructure. This role involves setting security architecture,…

  • Security architecture
  • Infrastructure engineering
  • Threat modelling
  • Incident response
  • Security assurance
via Arbeitnow
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Evolutionary Optimisation - Member of Technical Staff

Callosum
London

This role owns Callosum’s program evolution and optimisation loop, an LLM-guided search system that iteratively generates, evaluates, and improves programs against verifiable…

  • Optimisation
  • Search algorithms
  • Evolutionary methods
  • Stochastic methods
  • Combinatorial methods

ML Research Engineer - Member of Technical Staff

Callosum
London

Callosum is building an infrastructure layer that orchestrates heterogeneous models and hardware to improve AI system performance and cost. This role focuses on developing a…

  • LLMs
  • Agentic systems
  • Experimental design
  • Software engineering
via Arbeitnow

Research Engineer, Evals - Member of Technical Staff

Callosum
London

Callosum is building the infrastructure to unify heterogeneous compute across the full stack for AI systems. This role focuses on developing rigorous, evidence-based evaluation…

  • LLMs
  • Agentic systems
  • Statistical analysis
  • Experimental design
  • Software engineering
via Arbeitnow

Agent Runtime & Systems - Member of Technical Staff

Callosum
London

Callosum is building a software orchestration layer to unify heterogeneous compute for AI systems. This role owns the runtime and programming model for long-running agent systems,…

  • Distributed systems
  • Python
  • Rust
  • C++
  • Go

Research Engineer, Benchmarking

Callosum
London

This role involves building a unified, reproducible benchmarking system to evaluate agentic and algorithmic solutions. You will design a harness that measures task success,…

  • Python
  • LLM evaluation
  • Agentic systems
  • Distributed execution
  • CI

Applied AI - Member of Technical Staff

Callosum
London

The Applied AI team owns customer engagements end to end, acting as the technical bridge between customer workloads and Callosum's infrastructure. You will design and run rigorous…

  • Applied AI
  • LLM serving infrastructure
  • Agent orchestration
  • Retrieval systems
  • Benchmarking
via Arbeitnow
Machine learning
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