Senior Fullstack Engineer (Web3)

TL;DR

Senior Fullstack Engineer (Web3): Building and scaling embedded wallet infrastructure and developer tooling for a global digital asset platform with an accent on React, TypeScript, and Node.js. Focus on designing secure-by-default architecture, implementing robust APIs, and creating seamless user experiences for high-stakes fintech and crypto applications.

Location: Toronto, Ontario, Canada

Salary: $177,000–$230,000 (NYC market reference)

Company

hirify.global provides institutional-grade security and infrastructure for organizations across the digital asset ecosystem, enabling businesses to securely access and manage cryptocurrencies.

What you will do

• Design and implement rich frontend experiences and scalable backend services for the Dynamic wallet platform.
• Own technical design, architecture, implementation, and deployment of features across the stack.
• Build and maintain backend services and APIs for authentication, wallets, and payments.
• Develop user-facing features and developer tooling for wallet-based applications.
• Collaborate with product and design teams to deliver high-impact, robust features.
• Contribute to platform performance, reliability, and security through best practices like code reviews and automated testing.

Requirements

• 3–5 years of professional experience building production-grade full-stack applications.
• Proficiency in React and TypeScript.
• Strong experience building backend systems and APIs using Node.js and Express.
• Ability to navigate and contribute to complex, evolving codebases.
• Commitment to writing clean, maintainable, and high-performance code.
• Interest in fintech and Web3 infrastructure.

Nice to have

• Experience with blockchain technologies and on-chain integrations.
• Proficiency in Solidity for smart contract development and testing.
• Experience securing smart contract systems post-deployment.
• Knowledge of various state management solutions in production React apps.
• Background in security-sensitive product development.

Culture & Benefits

• Work with a high-growth, mission-driven team defining the future of financial infrastructure.
• Collaborate with industry-leading fintech and crypto organizations.
• Opportunity to build products used by millions of wallets globally.
• Focus on engineering excellence, security-first mindset, and collaborative developer experience.