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Callosum 🇬🇧 Hiring · 12 open roles ↗

Seed

Infrastructure for the co-evolution of diverse chip architectures and intelligence.

About Callosum

The company develops infrastructure that facilitates the co-evolution of diverse chip architectures and intelligence, focusing on integrating heterogeneous technologies to enhance performance and adaptability. This approach aims to address complex global challenges by enabling collaboration among various computational methods and silicon designs.

Callosum is a UK-based company founded in 2025, now around 36 people. It has raised $110.2M in disclosed funding. FundFinder classes it as DevTools & Infra.

Founded by Danyal Akarca (Co-founder; University of Cambridge), Jascha Achterberg (Co-Founder and CTO; repeat founder; previously Better Mental Wealth, Gates Cambridge; University of Cambridge).

Its investors also appear on FundFinder's most-active lists for Seed · B2B (120 funds), Seed · Fintech (111 funds), Seed · Healthcare & Wellbeing (87 funds).

Company facts from Harmonic and public filings; team backgrounds from public profiles. Refreshed weekly.

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Hiring now · 12 live roles, checked daily

Showing the newest 8 · all 12 on their careers page ↗

Seed · Aug 2026

  • AlbionVC — Backing visionary founders with long-term capital & scale-up expertise. · cheques £1M – £10M
  • Atomico — Atomico is an international investment firm that focuses on helping disruptive technology companies scale globally, with a particular focus on Europe. · cheques £5M – £20M
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