Senior Full-Stack Engineer (Node.js + React) with Web3 experience
Summary
Senior Full-Stack Engineer to build and own features across the stack for a digital asset security platform's wallet infrastructure, working with Node.js, React, TypeScript, and Web3/blockchain technologies to help financial institutions protect digital assets from theft.
Summary
Digital asset security platform that helps financial institutions protect digital assets from theft or hackers by using breakthrough MPC & patent-pending chip isolation technology to secure private keys, API credentials and eliminate the need for deposit addresses.
Expert Full-stack and 1 Senior full-stack: Wallet and FinApps team
Locations ONLY: Ukraine, Bulgaria, Czechia, Poland, Romania, Slovakia
B2B Direct Hire Contract (no subcontracts)
About Us
We are a custom product engineering company that supports both multinational organizations and scaling startups to solve their most complex business challenges.
With a global team of over 4,000 highly skilled developers, consultants, analysts and product owners, we engineer technology that redefines industries and shapes the way people live.
Responsibilities:
Design and implement rich frontend experiences and scalable backend services that power the client’s wallet infrastructure through the Dynamic platform
Own features across the stack: from technical design and architecture through implementation, testing, deployment, and ongoing optimization
Build and maintain backend services and APIs supporting authentication, wallets, and payments infrastructure
Develop user-facing features and frontend tooling for both end-user and developer-facing applications
Collaborate closely with Product, Design, and other engineering teams to deliver robust, high-impact features
Contribute to performance, reliability, and scalability improvements across the platform
Help uphold engineering best practices through code reviews, testing, documentation, and knowledge sharing
Must Have Requirements
5+ years of experience building and shipping production-grade full-stack web applications
Node.js: Experience building backend systems and APIs using Node.js (and frameworks such as Express)
React: Strong experience with React and TypeScript on the frontend
Experience with blockchain technologies (e.g., Web3, EVM chains, wallets, on-chain integrations)
Nice to Have
Solidity (other smart contract) experience – writing, deploying, testing, or interacting with smart contracts in production environments
Experience in maintaining, testing, and securing smart contract systems post- deployment