DevOps Security Engineer

About Legacy

Legacy is an easy-to-use, non-custodial Web3 wallet designed to protect digital assets through beneficiary protection and seamless DeFi access. Users can swap across chains, earn yield in one click, and safeguard wealth for the next generation.

Legacy is built by the team behind Decentralized Masters - a profitable $50M+ education and investment ecosystem with 4,000+ high-net-worth investors.

We’ve launched. Demand is strong. Now we need someone to own the post-acquisition customer journey and turn users into long-term, high-LTV subscribers.

We are building a portfolio of software products inside the Decentralized Masters ecosystem, including:

• Legacy Wallet – a non-custodial Web3 wallet with beneficiary protection and seamless DeFi access
• Trading Bot – automated crypto execution tools for serious investors
• Future fintech and investor infrastructure tools

We are now building the retention and lifecycle engine that will power long-term recurring revenue across all products.

About the Role

You will be the single person responsible for the security of a platform that tracks hundreds of millions in digital assets. That is the job. Everything else is secondary.

We need someone who breaks things for a living. Someone who looks at a login page and sees six attack vectors. Someone who reads a pull request and catches the injection vulnerability that two senior developers missed. Someone who lies awake thinking about the phishing campaign that hasn't been invented yet. If that sounds exhausting, this is not your role. If that sounds like Tuesday, keep reading.

Your primary responsibilities are security and quality assurance. You own penetration testing, vulnerability assessments, threat modeling, automated test frameworks, and CI quality gates across every product we ship. You also own infrastructure: AWS, CI/CD pipelines, monitoring, and incident response. And because we are a small, senior team, you will write production code when security and QA responsibilities are covered. You are not a consultant or a checkbox auditor.

You are an engineer who ships, and whose code happens to make everything else harder to break.

The ideal candidate has spent time at major product-driven fintech and crypto companies where a single security failure can destroy user trust overnight.

Security (Primary)

• Own the security posture across all products:
  Legacy, Trading Bot, and future platforms. If something gets breached, it is your problem. If nothing gets breached, it is because of your work.
• Conduct regular penetration testing, vulnerability assessments, and threat modeling aligned with OWASP standards and methodologies
• Ensure full coverage of the OWASP Top 10 in application security testing, code reviews, and deployment checks
• Perform security-focused code reviews across frontend, backend, and infrastructure code, catching what standard code reviews miss
• Implement and manage secrets management (Vault, AWS Secrets Manager, or KMS), access controls, and least-privilege policies
• Build and maintain incident response playbooks. When something breaks, you lead the response, run the post-mortem, and ship the fix
• Stay ahead of Web3 and crypto-specific attack vectors: phishing campaigns, wallet exploits, API key compromises, supply chain attacks, and social engineering
• Manage and coordinate external security audits and penetration tests from third-party firms

Quality Assurance & Testing (Primary)

• Design and implement test strategies across all products: unit tests, integration tests, end-to-end tests, API tests, and regression suites
• Build and maintain automated testing frameworks and CI quality gates that prevent broken code from reaching production
• Define and track quality metrics: test coverage, flakiness rate, regression detection latency, and bug escape rate
• Write and execute security test cases: authentication flows, authorization controls, input validation, API abuse scenarios, and edge cases around financial data
• Perform both white-box and black-box testing, leveraging full codebase access to catch issues that surface-level QA would miss
• Test across the full stack: frontend UI, backend…