Senior Fullstack Engineer (Web3)

TL;DR

Senior Fullstack Engineer (React/Node.js): Engineering client wallet infrastructure and developer tooling for a digital assets platform with an accent on security, reliability, and scalability. Focus on designing rich frontend experiences and scalable backend APIs for payments and authentication.

Location: Must be based in Ukraine (UA-Remote)

Company

hirify.global is a custom product engineering company that supports multinational organizations and scaling startups to solve complex business challenges.

What you will do

• Design and implement rich frontend experiences and scalable backend services for wallet infrastructure via the Dynamic platform.
• Own features across the entire stack, from technical design and architecture to implementation, testing, and deployment.
• Build and maintain backend services and APIs supporting authentication, wallets, and payments infrastructure.
• Develop user-facing features and frontend tooling for both end-users and developers.
• Collaborate with Product, Design, and engineering teams to deliver robust, high-impact features.
• Uphold engineering best practices through code reviews, testing, and documentation.

Requirements

• 3–5 years of experience building and shipping production-grade full-stack web applications.
• Must be based in Ukraine.
• Strong experience with React and TypeScript on the frontend.
• Experience building backend systems and APIs using Node.js and frameworks like Express.
• Ability to work across complex, evolving codebases with a focus on clean, maintainable code.
• Interest in fintech and Web3 infrastructure at a global scale.

Nice to have

• Experience with blockchain technologies, such as EVM chains, wallets, and on-chain integrations.
• Solidity experience for writing, deploying, and testing smart contracts.
• Experience with diverse state management solutions in React applications.
• Background in security products or other high-sensitivity domains.

Culture & Benefits

• Radical flexibility: choose between working remotely or from the office.
• Comprehensive care: company-paid medical insurance, mental health support, and financial/legal consultations.
• Tailored learning: access to Udemy, language courses, company-paid certifications, and internal meetups.
• Growth opportunities: internal mobility across diverse domains and large-scale global projects.
• Collaborative environment: work alongside top professionals in an open-door culture.