What does Castelion do?
A venture-backed defense tech company building mass-producible hypersonic weapons systems using modern hardware development and manufacturing processes.
Castelion jobs, careers, and hiring context
Explore Castelion careers and hiring status. Find jobs at Castelion and official application links when roles are open. Funding stage: Series C. Headcount: 201-500. Includes the official careers page link. A venture-backed defense tech company building mass-producible hypersonic weapons systems using modern hardware development and manufacturing processes.
This page summarizes open roles, company profile signals, and official application paths so candidates can quickly evaluate fit before applying. Use the role list below to identify team focus, review location patterns, and jump to source listings. For broader comparison across the market, continue to the full company directory and jobs explorer.
Open roles
0
Funding stage
Series C
Total funding
$1.47B
Key facts
Castelion is a Series C stage AI startup, founded in 2022, with $1.47B in total disclosed funding. Its most recent round was a $1B Series C in Aug 2026. It has no open roles listed at the moment; new Castelion openings are tracked daily. Source: Fast AI Jobs company dataset, updated Oct 2026.
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Company profile last updated on Oct 5, 2026.