Senior Security Engineer (Remote - Worldwide)

This is a senior security engineering role at a fast-growing payments infrastructure company that moves digital money across cards, wallets, on/off-ramps and cross-border rails. The company is backed by well-known fintech, crypto and SaaS investors and has recently raised a large Series C. The security team is small, senior and cross-functional, and it builds most of the tooling it runs. You will protect systems that move real money around the clock, and you will work closely with engineering, compliance and leadership.

What you'll do

• Build central security systems for detection, response, sensors and threat intelligence, plus the automation the company relies on
• Secure cloud infrastructure, identity and access across a growing footprint
• Review new products, partners and vendors before launch and guide the engineers building them
• Design, tune and supervise AI agents and tools that speed up alert triage, investigation and response
• Lead external security assessments and drive findings through to verified fixes
• Join the on-call rotation and support incident response

What you need

• 5+ years in security engineering, including tools and controls running in production
• Strong coding skills in TypeScript, Go, Rust or Python
• Hands-on experience securing cloud infrastructure, identity and access
• Ability to find vulnerabilities, prove their impact, and work with the owning team to fix them
• Experience at a fintech, payments or crypto company
• Nice to have: blockchain security (smart contract review, onchain monitoring, custody and multisig), AI security, or experience running external audits or a bug bounty program

Open to applicants anywhere in the world.

How to apply

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