Senior Security Engineer

Job not on LinkedIn

🕒 May 20

🇬🇧 United Kingdom – Remote

⏰ Full Time

🟠 Senior

👮‍♂️ Cybersecurity / Security Engineer

👻 Ghost score 50%

What it means: how likely this posting is sitting open without active hiring.How to read it: 60% or higher means we think this is a ghost. Lower scores are less of a worry.How we score it: age, reposts, open roles vs team size, how fast jobs close, and whether pay is listed.Fine print: an estimate from public data, not a judgment of the company. Real jobs can score high, so treat it as a hint, not a fact.

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Project Eleven

WebsiteLinkedInAll Job Openings

1 - 10 employees

Founded 2024

💼 Consulting

🏥 Healthcare

₿ Crypto

💰 $6M Seed on 2025-07

Consulting • Healthcare • Crypto

Project Eleven is a company focused on securing digital assets for the post-quantum era. It appears to develop or provide post-quantum cryptographic solutions, tooling, and guidance to protect blockchain keys, wallets, and other digital asset infrastructure against future quantum threats. The company likely produces software, research, or services aimed at migrating existing systems to quantum-resistant security and safeguarding Web3 and crypto-native assets.

📋 Description

• Owning the security posture of our institutional product end-to-end: threat models, secure design reviews, sensitive operational procedures, incident response • Partnering with engineering on secure design across our backend systems, including review of cryptographic protocols and integrations • Building out our application security program: secure SDLC, code review standards, supply chain hardening, dependency scanning, secrets management • Establishing and operating vulnerability management, penetration testing cadence, and bug bounty as we scale • Developing our incident response capability: runbooks, on-call rotation, postmortem culture • Collaborating on our compliance program (SOC 2 Type II as the first milestone) and establishing controls, policies, and evidence collection that hold up to institutional due diligence • Acting as the security voice in customer conversations, due diligence questionnaires, and security reviews with institutional buyers

🎯 Requirements

• 5+ years in security engineering, with significant ownership of a production security program (not purely advisory or audit-side) • Experience securing systems at meaningful scale with strong correctness, durability, or regulatory requirements • Strong applied cryptography knowledge: key management, signing protocols, secure key handling at rest and in use • Experience taking an organisation through SOC 2, ISO 27001, or equivalent • Hands-on experience with cloud security (AWS) and modern deployment platforms; comfortable reading and writing infrastructure code • Track record of partnering with engineering teams rather than gating them; you ship security improvements as code and policy, not just tickets • Strong threat modeling instincts and the ability to make pragmatic risk tradeoffs in a fast-moving startup environment • Strong English communication, including the ability to represent security clearly to institutional customers and auditors.

🏖️ Benefits

• Equal Opportunity: We are committed to equal employment opportunity and believe that diverse teams build better products. All qualified applicants will receive consideration without regard to any protected characteristic under applicable law.