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Senior Fullstack Engineer

2 hours ago
Russia
Full-time
Senior
Full-stack Engineer
Software Development
Docker Ethereum Git Go gRPC JavaScript Jest Kafka Kubernetes MongoDB NATS Next.js OpenAPI PostgreSQL Prometheus RabbitMQ React React Native Redis REST API Tailwind CSS TypeScript WebSockets
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Xsolla

Xsolla

Xsolla is an international payment solution provider for online games, offering tools to launch, monetize, and scale games worldwide with local payment methods and fraud prevention.

Internet Software & Services
251-1K
Founded 2005
View All Jobs 91

Description

  • Develop Go backend services using go-ethereum, ethkit, and generated contract bindings.
  • Implement ERC-4337 UserOperation flows, bundler/paymaster integrations, gas sponsorship, and session-key functionality.
  • Design backend-for-frontend services integrating blockchain sources, indexers, and wallet providers.
  • Build React and Next.js applications with embedded wallet, social authentication, passkey, and Web3 functionality.
  • Implement contract interactions, EIP-712 transaction confirmations, WebSocket event updates, and transaction tracking.
  • Develop shared web and React Native components using Tamagui.
  • Build end-to-end features from smart-contract events through user interfaces, including ZKsync Era and L1–L2 bridging flows.
  • Create administrative panels for NFT drops, marketplace configuration, and analytics.
  • Write backend and frontend tests and maintain OpenAPI/Swagger and technical documentation.

Requirements

  • 3+ years of commercial Go experience.
  • 3+ years of experience with React and modern JavaScript/TypeScript.
  • Strong REST API design and implementation skills.
  • Experience with MongoDB and/or PostgreSQL and an understanding of microservices architecture.
  • Proficiency with state management tools such as Redux or Zustand, responsive design, CSS frameworks, and web performance optimization.
  • Experience with Git, CI/CD pipelines, Docker, and containerization.
  • Strong problem-solving and communication skills.
  • Preferred: Knowledge of ERC-4337, session keys, delegated permissions, EIP-712, ERC-1271, and WebAuthn/passkeys.
  • Preferred: Experience with wallet standards and tools including EIP-1193, EIP-6963, EIP-5792, ethers.js, viem, wagmi, and embedded wallet SDKs.
  • Preferred: Familiarity with ZKsync Era, EraVM, L1–L2 communication, React Native, Tamagui, WebSockets, Kubernetes, and cloud infrastructure.

Benefits

  • 100% company-paid medical, dental, and vision plans.
  • Unlimited flexible time off.
  • Personalized career roadmap.
  • Professional development, training, and educational opportunities.
  • 401(k) retirement plan.
  • Equity participation opportunities.
  • Remote-first culture with flexible collaboration across time zones.
  • Work on Web3, blockchain, and gaming technology.

Interested in this position?

Apply directly on the company website

Apply Now

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