O

Senior Security Engineer

offchain • Romania
Full Remote
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Key Highlights
Lead red team exercises and penetration testing across Offchain's infrastructure and ecosystem tools
Conduct comprehensive code audits and cloud (AWS) security assessments
Build custom offensive security tools and automation frameworks
5+ years offensive security experience with binary exploitation and MITRE ATT&CK mastery required
Strong programming skills in Python or Go essential
Key Responsibilities
Conduct penetration tests and red team exercises across cloud and backend infrastructure
Perform comprehensive code audits to identify and remediate security vulnerabilities
Build and maintain custom offensive security tools and automation frameworks
Collaborate with detection engineering and incident response teams
Provide offensive security expertise during incident investigations
Mentor junior team members and cultivate security culture
Technical Skills Required
Penetration Testing AWS Python/Go Programming
Benefits & Perks
Remote-first global workforce
Professional reimbursement program
Medical, dental & vision coverage
401k retirement plan with company match
Wellness stipend
Home office set up / ergonomic equipment program
Nice to Have
Web3 / blockchain security exposure and smart contract auditing experience
Familiarity with Ethereum L1 / L2 node architecture and security risks
Blockchain infrastructure penetration testing experience

Job Description

The Role

As a Senior Security Engineer at Offchain, you will emulate the real-world tactics, techniques, and procedures of sophisticated adversaries to surface vulnerabilities across our infrastructure and ecosystem tools.

You'll run hands-on penetration tests, lead red team exercises, and work side-by-side with blue team partners to test, refine, and strengthen detection and response capabilities.

Your efforts will directly shape how Offchain designs, launches, protects, and achieves compliance for the infrastructure that powers millions of users and applications — including key standards such as SOC 2.

What you'll do

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