Expert JavaScript Engineer (Web3)

TL;DR

Expert JavaScript Engineer (Web3): Building secure, scalable full-stack experiences, backend services, APIs, and developer tooling for digital asset wallets through the Dynamic platform with an accent on blockchain infrastructure, fintech, and developer experience. Focus on designing cross-stack features, securing smart contract integrations, and improving performance, reliability, and scalability for high-volume financial applications.

Location: Romania; fully remote or from the Bucharest office

Company

hirify.global is a custom product engineering company delivering software solutions for multinational organizations and scaling startups through a global engineering team.

What you will do

• Design and implement frontend experiences and scalable backend services for digital asset wallet infrastructure.
• Own features across technical design, architecture, implementation, testing, deployment, and optimization.
• Build and maintain Node-based backend services and APIs for authentication, wallets, and payments.
• Develop user-facing applications and developer tooling across the full stack.
• Collaborate with Product, Design, and engineering teams to deliver reliable, high-impact features.
• Improve platform performance, security, reliability, scalability, documentation, and engineering practices.

Requirements

• 3–5 years of experience building and shipping production-grade full-stack web applications.
• Backend development experience with Node and frameworks such as Express.
• Ability to work across frontend and backend systems in complex codebases.
• Strong focus on clean, maintainable code and system performance.
• Experience collaborating with product and design partners.
• Interest in fintech, Web3, and infrastructure operating at global scale.

Nice to have

• Experience with blockchain technologies, EVM chains, wallets, or on-chain integrations.
• Production experience writing, deploying, testing, or integrating Solidity smart contracts.
• Experience maintaining and securing smart contract systems after deployment.
• Experience with state management solutions in production React applications.
• Background in security products or other high-sensitivity domains.

Culture & Benefits

• Friendly, open-door environment with a strong professional community.
• Large-scale projects and opportunities to expand technical expertise.
• Internal meetups, conferences, workshops, Udemy access, language courses, and company-paid certifications.
• Internal mobility across diverse domains and technologies.
• Remote work or office-based work in Romania, according to preference.
• Medical subscription with Regina Maria and meal tickets worth 16 RON net per worked day.

Hiring process

• Submit an application to begin the selection process.
• Further interview and evaluation steps will be communicated during the process.