Callosum

Systems Tooling - Member of Technical Staff

Callosum
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4 months ago
London, United KingdomSenior
H1B sponsor

Responsibilities

  • Extend profiling and tracing tools for new accelerators, including performance-data collection, compression, and visualization.
  • Develop CLI tools and automation for launching inference stacks, benchmarks, and configuration management.
  • Convert internal tooling prototypes into high-performance, scalable, accessible commands.
  • Build request tracing, pipeline visualization, and debugging tools for multi-agent serving workflows and complex inference DAGs.
  • Create shared internal libraries and abstractions that improve engineering productivity.

Requirements

  • Demonstrate strong software engineering fundamentals, including clean APIs, robust error handling, sensible defaults, and clear documentation.
  • Have experience with profiling and tracing systems such as perf, Nsight, Tracy, or similar tools.
  • Be familiar with observability stacks such as Prometheus, Grafana, OpenTelemetry, or equivalent systems.
  • Be comfortable working across low-level trace collection, dashboards, and developer-facing CLI tools.

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.

Tech Stack

GrafanaPrometheus

Categories

Callosum

About Callosum

11-50 employees
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