Senior Security Engineer

As a Senior Security Engineer at Rain, you will secure the systems that power a global stablecoin payments platform where real money moves every second across cloud infrastructure, identity, endpoints, partner integrations and smart contracts. You join a small, senior, and cross-functional security team that builds most of what it runs, using AI agents for alert triage, investigation and response. You will span the whole program: building security tooling and controls, hardening infrastructure and access, and tackling the hardest problems as Rain expands into new products and chains.

What you'll do

• Build central security systems and automation that the whole company relies on
• Secure cloud infrastructure, identity and access across Rain's growing footprint
• Assess new products, partners and vendors before launch, and guide the engineers building them
• Build AI agents and tools that make security work faster and more accurate
• Lead external security assessments and drive findings to verified fixes
• Join the on-call rotation and support incident response

What you bring

• 5+ years in security engineering, including building tools and controls that run in production
• Strong coding skills in TypeScript, Go, Rust or Python
• Experience securing cloud infrastructure, identity and access
• Ability to find vulnerabilities, prove them, and drive the fix with the team that owns the code
• Experience at a fintech, payments or crypto company

Nice to have

• Blockchain security: smart contract review, onchain monitoring, custody and multisig controls
• AI security: securing LLM applications and agents, or building AI into security workflows
• Experience running external audits or a bug bounty program

What we offer

• Unlimited time off with a minimum of 10 days required annually
• Flexible working environment, with the option to work from home or in an office
• Home office setup stipend for new team members
• Comprehensive health, dental and vision plans (US), plus 100% company-subsidized life insurance
• 401(k) with 4% company match
• Equity option plan for all team members
• Rain Card issued to all team members for product testing and eligible health and wellness spending
• Team and company offsites both domestically and internationally

About Rain

Rain is the global stablecoin payments platform trusted by more than 100 organizations worldwide. As both a Visa and Mastercard Principal Member, Rain issues cards that work at more than 175 million merchant locations in over 220 countries and territories. In January 2026, Rain closed a $250M Series C led by ICONIQ, valuing the company at $1.95B.