Senior Fullstack Engineer
Xsolla (USA), Inc., operating under the Xsolla brand, is a global video game commerce and payments company serving game developers, publishers, creators, and payment providers.
Maintainer signals as of 9/25/2026
Projects
About Xsolla (USA), Inc.
Xsolla provides merchant-of-record and payment-processing services plus direct-to-consumer commerce, web shops, publishing and distribution tools, cloud gaming, fraud prevention, player engagement, creator monetization, and developer tooling for the video game industry. Its solutions operate across 200+ geographies with 1,000+ payment methods and are actively supported through live products, documentation, customer support, and ongoing hiring.
Skills
Candidate Availability
Required and preferred rules are kept separate and reflect the wording in the original posting.
About the Role
You will build Go backend services and responsive React applications for wallet, marketplace, and Web3 products. You will implement account-abstraction and smart-contract flows, real-time blockchain features, transaction tracking, admin tools, tests, and API documentation. You will integrate wallet SDKs, blockchain services, and cross-platform web and mobile components.
Requirements
- 3+ years of commercial Go experience
- REST API design and implementation skills
- Experience with MongoDB or PostgreSQL
- Knowledge of microservices architecture
- 3+ years of React and JavaScript or TypeScript experience
- Experience with Redux, Zustand, or similar state-management tools
- Responsive-design and CSS-framework experience
- Knowledge of web performance optimization
- Experience with Git and CI/CD
- Experience with Docker and containerization
Responsibilities
- Develop Go services for wallet operations and blockchain interactions
- Implement ERC-4337 user-operation flows with bundlers and paymasters
- Build smart-contract interaction layers using generated Go bindings
- Implement account-abstraction support, gas sponsorship, and session keys
- Design BFF services for blockchain data and wallet infrastructure
- Build responsive React and Next.js applications
- Implement embedded-wallet authentication and passkey flows
- Build Web3 interfaces using wagmi and viem
- Implement transaction-confirmation and EIP-712 signing flows
- Develop WebSocket-based blockchain-event features
- Build cross-platform components for web and React Native
- Implement transaction tracking, reorganization handling, and notifications
- Create Web3 operations admin panels
- Write backend and frontend tests
- Document APIs with OpenAPI and Swagger
