Senior Software Engineer/Tech Lead, Web3 Initiatives – Backend-focused

Reap

Senior Software Engineer driving web3 technical initiatives for a fintech company. Building Web3 capabilities for financial products and collaborating with global teams on innovative solutions.

Posted 5/12/2026full-timeRemote • 🌎 Anywhere in the WorldSeniorWebsite

Tech Stack

Tools & technologies

AWSCloudJavaScriptNode.jsRustSolidityTypeScriptWeb3

About the role

Key responsibilities & impact

Own CaaS web3 capabilities — build secure, scalable blockchain systems for card-as-a-service, asset management, and financial use cases
Lead wallet infrastructure discovery and development — architecting wallet solutions that support Reap's product roadmap
Build backend services (Node.js/TypeScript) to support on-chain functionality, working closely with backend engineering
Collaborate with product and business teams to translate ideas into clear, secure technical execution
Contribute to architecture decisions, code reviews, and security audits
Leverage AI tools and modern development practices to drive engineering efficiency and velocity

Requirements

What you’ll need

5-8+ years in software development, ideally with backend engineering experience in Node.js/TypeScript and AWS (or similar cloud infrastructure)
Experience building wallet infrastructure (hot/cold wallet)
Strong product sense and ability to take end-to-end ownership of technical initiatives
Demonstrated use of AI tools to boost development efficiency
Clear communication, collaboration, and commitment to code quality
Fintech sector experience ideal
Nice to Have
Experience with DeFi protocols, cross-chain integrations, or account abstraction
3+ years building smart contracts on Solana (Rust) or Ethereum (Solidity), with strong expertise in at least one and openness to developing in a multi-chain environment
Knowledge of finance systems or payments products (especially card issuance or stablecoin-powered payments)
Startup experience where you've worn multiple hats

Benefits

Comp & perks

A high-impact role in a rapidly growing fintech startup
Flexible hybrid work environment with a global, collaborative team
Insurance coverage after probation
Reap Card stipend
Use of AI tools at work — and the space to learn, experiment, and grow with them
A culture of innovation, inclusion, and continuous learning

ATS Keywords

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Hard Skills & Tools

Node.jsTypeScriptAWSsmart contractsRustSolidityCaaSwallet infrastructureDeFi protocolscross-chain integrations

Soft Skills

clear communicationcollaborationcommitment to code qualitystrong product senseend-to-end ownership