Senior Fullstack Engineer

Xsolla is a global commerce company with robust tools and services to help developers solve the inherent challenges of the video game industry. From indie to AAA, companies partner with Xsolla to help them fund, distribute, market, and monetize their games. Grounded in the belief in the future of video games, Xsolla is resolute in the mission to bring opportunities together, and continually make new resources available to creators. Headquartered and incorporated in Los Angeles, California, Xsolla operates as the merchant of record and has helped over 1,500+ game developers to reach more players and grow their businesses around the world. With more paths to profits and ways to win, developers have all the things needed to enjoy the game.

For more information, visit xsolla.com.

Backend:

Frontend:

Infrastructure:

• Develop backend services in Go using go-ethereum/ethkit for wallet operations and blockchain interactions

• Implement and monitor the ERC-4337 UserOperation lifecycle (prepare→sign→submit→confirm) against bundlers and paymasters

• Implement smart contract interaction layer with abigen-generated Go bindings

• Build Account Abstraction support: paymaster gas-sponsorship logic, session-key issuance (ERC-7710 / ERC-7715) for gameplay transactions

• Design BFF services orchestrating data from multiple blockchain sources, indexers, and wallet infrastructure providers

• Build responsive applications using React/Next.js integrated with an embedded/AA wallet SDK

• Implement Embedded Wallet flows: social auth (Google, Apple), email login, passkey (WebAuthn/P-256) support

• Create Web3-enabled UIs using wagmi hooks and viem for contract reads/writes, following EIP-1193/EIP-6963 provider standards

• Implement transaction confirmation flows that clearly convey what the player is approving (EIP-712 typed-data signing)

• Develop real-time features with WebSocket subscriptions for blockchain events

• Build cross-platform components with Tamagui for web and React Native

• Design and implement complete features from smart contract events to UI updates

• Handle ZK Stack specifics: EraVM gas model differences, native Account Abstraction, L1↔L2 bridging UI flows

• Implement transaction tracking: status polling, reorg handling, user notifications

• Create admin panels for managing NFT drops, marketplace settings, and analytics

• Write comprehensive tests for both backend (Go) and frontend (Jest, React Testing Library)

• Document APIs using OpenAPI/Swagger and maintain technical documentation

 
 

 

Backend Skills:

• 3+ years of commercial experience with Go

• Strong knowledge of REST API design and implementation

• Experience with MongoDB and/or PostgreSQL

• Understanding of microservices architecture

Frontend Skills:

• 3+ years of experience with React and modern JavaScript/TypeScript

• Proficiency in state management solutions (Redux, Zustand, etc.)

• Experience with responsive design and CSS frameworks

• Understanding of web performance optimization

General:

• Experience with Git and CI/CD pipelines

• Familiarity with Docker and containerization

• Strong problem-solving and communication skills

Web3 & Blockchain:

• Working knowledge of ERC-4337 Account Abstraction: EntryPoint, UserOperation lifecycle, bundler/paymaster roles

• Understanding of session keys and delegated permissions (ERC-7710 / ERC-7715) and signature schemes (EIP-712, ERC-1271, WebAuthn/passkey)

• Familiarity with wallet provider standards: EIP-1193, EIP-6963, EIP-5792

• Exposure to an embedded/AA wallet SDK (Sequence, thirdweb, Privy, Dynamic, Turnkey, or equivalent):

• Embedded Wallet integration (social auth, passkeys)

• Indexer/data-availability integration for balance/activity tracking

• Gas-sponsorship / transaction-relay APIs

• Knowledge of ZK Stack / ZKsync Era:

• Understanding of EraVM vs EVM differences

• L1↔L2 communication patterns

• Native Account Abstraction on zkSync-family chains

• Experience with ethers.js, viem, and wagmi for React

• Understanding of smart contract interaction: ABI, events, transaction lifecycle

• Knowledge of token standards (ERC-20, ERC-721, ERC-1155)

Additional:

• Experience with Next.js SSR/SSG and App Router

• Familiarity with React Native and Tamagui for cross-platform

• Understanding of WebSocket for real-time blockchain events

• Knowledge of Kubernetes and cloud infrastructure

For this position, we will conduct a background check that may include:

• Criminal history check

• Employment verification

• Education verification

The background check is relevant to this position because of the following role responsibilities:

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  Handling sensitive financial information and blockchain transactions

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  Accessing confidential company data and user information

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  Ensuring compliance with regulatory requirements

Applicants are encouraged to inquire about their rights under the Fair Chance Act. If you have questions regarding our hiring practices, please contact careers@xsolla.com.

If you have questions regarding our hiring practices, please contact careers@xsolla.com.

For more vacancies, visit: xsolla.com/careers