Senior Fullstack Engineer (Web3)

Location: Remote, Russia / Perm / Moscow

Company

hirify.global is a global commerce company providing tools and services for video game developers to fund, distribute, market, and monetize games.

What you will do

• Develop Go backend services for wallet operations, blockchain interactions, BFF orchestration, and ERC-4337 UserOperation flows.
• Build React and Next.js applications with embedded smart wallets, social authentication, passkeys, and Web3 transaction flows.
• Implement account abstraction features, including paymaster gas sponsorship, session keys, delegated permissions, and smart contract integrations.
• Connect smart contract events to real-time web and mobile interfaces using WebSockets, wagmi, viem, and React Native components.
• Develop ZKsync Era and ZK Stack features, including L1-to-L2 bridging, transaction tracking, reorg handling, and user notifications.
• Create admin panels for NFT drops, marketplace settings, and analytics, while maintaining tests and OpenAPI documentation.

Requirements

• 3+ years of commercial experience with Go and 3+ years of experience with React and modern JavaScript or TypeScript.
• Strong knowledge of REST API design, MongoDB or PostgreSQL, microservices architecture, state management, responsive design, and web performance optimization.
• Experience with Git, CI/CD pipelines, Docker, containerization, and automated testing.
• Strong problem-solving and communication skills.
• Experience or working knowledge of Web3 concepts, including smart contract interactions, Ethereum transaction lifecycles, and account abstraction.

Nice to have

• Experience with ERC-4337, session keys, delegated permissions, EIP-712, ERC-1271, WebAuthn, and wallet provider standards.
• Experience with embedded wallet SDKs, indexers, transaction relays, ethers, viem, wagmi, React Native, or Tamagui.
• Knowledge of ZKsync Era, EraVM, L1-to-L2 communication, token standards, Kubernetes, and cloud infrastructure.

Culture & Benefits

• Remote-first culture with flexible collaboration across time zones.
• Company-paid medical, dental, and vision plans.
• Unlimited flexible time off and a personalized career roadmap.
• Professional development through training and educational opportunities.
• 401(k) retirement plan and equity participation opportunities.
• Work on Web3, blockchain, and gaming technology.