Senior/Expert Full Stack Developer

Our client is looking for a Senior Full Stack Developer or Expert Full Stack Engineer to join a cross-functional team building the next generation of digital asset infrastructure.

Location: Ukraine, Bulgaria, Czech Republic, Slovakia, Romania, Poland – remote

The company is a global leader in digital asset and blockchain technology, providing one of the most secure and trusted platforms for managing digital assets. Its solutions are used by leading financial institutions, global banks, well-known brands, and Web3 companies worldwide.

As part of the team, you’ll help build and scale the platform powering more than 50 million wallets across crypto and fintech applications. You’ll work on both user-facing experiences and the backend services that support authentication, wallets, payments, and developer tooling.

This is a product-focused engineering team that values security, reliability, scalability, and exceptional developer experience. You’ll collaborate with talented engineers, product managers, and designers to deliver high-impact features while solving complex technical challenges at global scale.

Responsibilities

• Design and implement rich frontend experiences and scalable backend services that power 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

Requirements

• 3–5 years of experience building and shipping production-grade for Senior Full-stack and 7+ years for Expert Full-stack, full-stack web applications
• Strong experience with React and TypeScript on the frontend
• Experience building backend systems and APIs using Node.js (and frameworks such as Express)
• Comfort working across frontend and backend systems in complex, evolving codebases
• A strong appreciation for clean, maintainable code and system performance
• Experience collaborating cross-functionally with product and design partners
• Curiosity about fintech and Web3, and interest in building infrastructure used at global scale
• Experience with blockchain technologies (e.g., EVM chains, wallets, on-chain integrations)

As a Plus

• Solidity experience – writing, deploying, testing, or interacting with smart contracts in production environments
• Experience maintaining, testing, and securing smart contract systems post-deployment
• Experience with a variety of state management solutions in production React applications
• Experience with security products or other high-sensitivity domains

We Offer

• Comprehensive company-paid medical insurance and Mental Health programs.
• Tailored education path: boost your skills and knowledge with our regular internal events (meetups, conferences, workshops), Udemy license, language courses, and company-paid certifications.
• Flexible schedule
• Internal Mobility Program helps change a project if needed to help you grow, excel professionally, and fulfil your potential.
• Global impact: work on large-scale projects that redefine industries with international and fast-growing clients.
• The benefits package may vary by location and will be discussed individually during the recruitment process.

About the Company

The company is a global leader in digital asset and blockchain technology, providing one of the most secure and trusted platforms for managing digital assets. Its solutions are used by leading financial institutions, global banks, well-known brands, and Web3 companies worldwide.