Senior Software Engineer - MetaMask (Ramps)

At MetaMask, we’re building the tools and infrastructure to empower users across the globe to onboard into Web3. The 

RAMPS team

 enables seamless fiat on/off-ramping — helping users transition between traditional finance and decentralized applications. This is one of the most mission-critical and revenue-impacting surfaces in MetaMask, and we’re expanding our technical leadership to support a growing roadmap.

What you’ll do

As a senior engineer on the RAMPS team, you will:

1. Own the entire lifecycle of features and projects — from technical design through to launch and production monitoring
2. Build and ship user-facing features in our React Native mobile application
3. Contribute across the full stack: React Native mobile frontend, Node.js/NestJS backend API, and shared TypeScript libraries
4. Integrate third-party payment providers and financial services APIs
5. Improve application performance, test coverage, and developer experience
6. Onboard and mentor other engineers through code reviews and pairing
7. Identify and suggest areas of future work for yourself and the team
8. Collaborate with Product, Design, QA, and Backend Engineering partners to deliver on the team's roadmap
9. Participate in code reviews, sprint ceremonies, on-call rotations, and the hiring process
10. Leverage AI-assisted development tools (Cursor, Claude Code, or equivalent) as a core part of your daily engineering workflow

Would be great if you brought this to the role

As a senior engineer on the RAMPS team, you will:

1. 3+ years of experience in software engineering with a focus on mobile or full-stack development
2. Demonstrable proficiency with React Native (2+ years)
3. Proficiency in TypeScript across the stack (frontend and backend)
4. Backend experience with Node.js (NestJS, Express, or similar frameworks)
5. Experience with Web3 fundamentals — wallets, blockchain transactions, and the Ethereum ecosystem
6. Experience integrating third-party APIs, particularly in payments or financial services
7. Active, proficient use of AI-assisted development tools (Cursor, Claude Code, GitHub Copilot, or equivalent). We expect the majority of your development workflow to be AI-augmented — this is a core engineering practice on our team, not optional.
8. Strong communication and collaboration skills in a remote-first environment
9. Comfort working in agile environments with cross-functional teams
10. Commitment to clean code practices, testing, and maintainable software
11. Proactive and self-driven to be successful working remotely
12. Understands the business context their code supports and uses that knowledge to influence prioritization and trade-offs

Bonus Points

1. Prior experience at fintech or payments companies (e.g., Stripe, Revolut, Robinhood, Square)
2. Experience working on fiat on/off-ramp systems, KYC/AML flows, or payment rail integrations
3. Experience working in large, multi-team codebases with shared libraries and modular architecture
4. Experience building complex, data-rich mobile UIs with async data fetching, loading states, and error handling
5. Demonstrable proficiency with Android or iOS platform (1+ years)
6. Contributions to open-source projects
7. You're a MetaMask user

The salary range for US-based candidates only will be determined throughout the interview process depending on experience and skills.

US pay range (not including bonus, equity or other benefits)

$104,000—$156,000 USD