Senior Software Engineer (Web3)

TL;DR

Senior Software Engineer (Web3): Developing core infrastructure and user-facing features for the MetaMask Debit Card with an accent on secure financial integration and seamless wallet interaction. Focus on building scalable backend services, optimizing frontend performance in React Native, and ensuring reliable transaction processing within the Web3 ecosystem.

Location: Remote (United States, EMEA, LATAM)

Salary: $130,000–$187,000 USD

Company

hirify.global is a leading web3 software company building the infrastructure and platforms that power the Ethereum ecosystem and MetaMask.

What you will do

• Design and implement frontend components for MetaMask Debit Card interactions.
• Develop scalable backend services and APIs for card lifecycle and transaction management.
• Integrate with card issuers, payment networks, and compliance systems.
• Optimize system performance, security, and high-volume transaction throughput.
• Collaborate within an agile team to ship robust, user-facing features.

Requirements

• 3+ years of experience in mobile-based technologies and web/application development.
• Strong proficiency in React, React Native, and modern JavaScript/TypeScript.
• Familiarity with blockchain fundamentals and Web3 integration.
• Experience with API development, middleware services, and web security.
• Proven ability to write clean, testable code and adhere to coding standards.
• Must be based in the US, EMEA, or LATAM regions.

Nice to have

• Experience with fintech products, payment processing, or card issuing.
• Knowledge of DeFi protocols and digital asset management.
• Understanding of cryptography principles.
• Experience working in distributed, high-growth startup environments.

Culture & Benefits

• High-trust, autonomous, and remote-friendly work environment.
• Exposure to cutting-edge Web3 concepts and frameworks.
• Commitment to diversity, inclusivity, and career growth.
• Opportunities to join a network of builders across the global ecosystem.