Callosum

Applied AI - Member of Technical Staff

Callosum
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3 months ago
London, United KingdomSenior
H1B sponsor

Responsibilities

  • Own customer engagements from initial workload scoping through evaluation, integration, and production deployment.
  • Design and run rigorous evaluations on customer production workloads, including success criteria, instrumentation, comparisons, and presenting results to engineering teams.
  • Develop technical understanding of customer retrieval pipelines, agentic workflows, and code intelligence stacks, then design optimized Callosum workflows.
  • Integrate Callosum workflows into customer environments and support them through stable production.
  • Collaborate with research and platform teams to convert customer learnings into general product capabilities.
  • Build shared team methodology, including evaluation harnesses, integration runbooks, and engagement standards.

Requirements

  • Demonstrated exceptional technical depth through production systems at scale, shipped research, or an early/founding role with end-to-end system ownership.
  • Experience with LLM serving infrastructure, agent orchestration, or retrieval systems.
  • Experience conducting rigorous evaluations or benchmarking work.
  • Strong ownership, bias for action, and comfort with ambiguity.
  • Experience working directly with external engineering teams in a forward deployed engineering, solutions architecture, technical consulting, or comparable customer-facing role is a differentiator.
  • Familiarity with novel accelerator platforms is a differentiator.
  • Experience at an early-stage company or in a founding-engineer role is a differentiator.

Benefits

  • Competitive salary determined by skills and experience.
  • Equity and ownership.
  • Private healthcare.
  • Visa sponsorship and relocation benefits.
  • In-person work at the London office with provided tools, workspace, and setup.

Categories

Forward Deployed
Callosum

About Callosum

11-50 employees
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