Senior Blockchain Engineer (Web3 Greenfield Project)

About Reap

Reap is a global financial technology company headquartered in Hong Kong with employees across multiple countries. We enable financial connectivity and access for businesses worldwide by combining traditional finance with stablecoins for efficient money movement.

Through our stablecoin-powered corporate cards, payments, and expense management tools, we streamline financial operations and help businesses scale. Our APIs enable businesses to integrate stablecoin-enabled finance into their own products and services—from issuing Visa cards to facilitating cross-border payments.

Backed by leading investors including Index Ventures and HashKey Capital, Reap is building the future of borderless, stablecoin-enabled finance.

The Role

We're seeking a Senior Blockchain Engineer with extensive experience developing smart contracts, open to developing in multiple blockchains and most importantly someone who is passionate about applying blockchain technology to innovative financial products in the real world.

This is a hands-on engineering role with outsized ownership: you’ll shape system architecture, write secure and scalable code, and work closely with product and business teams to bring new ideas to life. It’s ideal for someone who loves building but also thinks like a product owner — connecting technical decisions to user experience and business outcomes.

What You’ll Do

• Design and deploy production-grade smart contracts.
• Build secure, scalable blockchain systems for asset management and financial use cases.
• Work with our backend engineer to develop backend services (Node.js/TypeScript) to support on-chain functionality.
• Work with product and business teams to turn ideas into clear, secure execution.
• Contribute to architecture decisions, reviews, and audits.
  
  

What We’re Looking For

• 5+ years in software development.
• 3+ years building smart contracts on Solana (Rust) or Ethereum (Solidity), with strong expertise in at least one and open to developing in a multi-chain environment.
• Strong product sense and ability to take end-to-end ownership.
• Clear communication, collaboration, and commitment to code quality.
  
  

Nice to Have

• Experience with DeFi protocols, cross-chain integrations, or account abstraction.
• Knowledge of finance systems or payments products.
• Startup experience where you’ve worn multiple hats.
  
  

Our Stack

• Frontend: React Native (Expo) app styled with Tailwind CSS and built on the Gluestack UI component library
• Data Layer: TanStack Query for efficient data fetching and client-side state management via REST APIs
• Backend: Serverless Node.js architecture using NestJS for API services and asynchronous job handling on AWS Lambda
• Database: PostgreSQL as the primary relational datastore
• Infrastructure: Fully deployed and managed on AWS with Terraform for infrastructure as code
• Tooling: Modern developer stack including GitHub, Slack, Notion, Linear, and Graphite
  
  

Why Join Us

DeFi Natives: Be at the forefront of financial innovation where traditional finance meets Web3. Work directly with major blockchains including Solana and Ethereum as we continue to expand our multi-chain capabilities.

Global Impact: Your code will power solutions used by hundreds of businesses internationally, handling significant transaction volumes across multiple blockchains.

Backed by Top Investors: Join a company supported by renowned investors including Index Ventures and Hashkey Capital.

Global Team: Collaborate with talented professionals across multiple countries, with flexible hybrid work options that prioritize results over location⁠.

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