Principal Vulnerability Engineer | High-Growth Cybersecurity Scale-Up | Fully Remote (UK)
- Remote – UK Based
- Up to £110,000 + benefits
- Permanent – Full time
Got a track record of 0-day discoveries, public CVEs, and a reputation for finding bugs that actually move the needle?
Join a research-driven, venture-backed cybersecurity scale-up trusted by Fortune 500 enterprises and critical infrastructure providers. Recognised by Gartner, $29M funded, and scaling fast worldwide.
As a Principal Vulnerability Engineer, you'll own the full vulnerability lifecycle – from discovery, through detection, to deployment – building production‑grade tooling and pioneering LLM-powered offensive security workflows.
What you'll be doing:
- Leading deep research across 0-days and n-days, with patch diffing across source‑available and binary‑only targets
- Designing tooling for automated vulnerability discovery, exploit validation, and detection signature generation
- Architecting production‑grade, LLM‑powered research workflows
- Focusing on the vulnerabilities that matter – RCEs, auth bypasses, the bugs that change a client's risk posture overnight
What they're looking for:
- 5+ years of mixed vulnerability research and software engineering experience
- A demonstrable track record of original 0-day discovery – public advisories, CVEs, or equivalent
- Deep n‑day research and patch diffing chops
- Confidence across both web and binary vulnerability classes
- Production‑grade software engineering experience, ideally in Python
- Mastery of Burp Suite, Ghidra/IDA, debuggers, fuzzers
- Hands‑on experience using LLMs in research workflows
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