Senior Fullstack Engineer

Xsolla

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

Posted 10/2/2026full-timeRemote • RussiaSeniorWebsite

Core Competencies

Role fit

Core Competencies

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Demonstrates expertise in developing backend services using Go and implementing blockchain interactions, including smart contract integrations and user operation lifecycles. Proficient in building responsive applications with React and Next.js, while ensuring optimal performance and user experience.

Highest-signal resume keywords

Go DevelopmentReact Application DevelopmentREST API DesignBlockchain InteractionMicroservices Architecture

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Hard Skills

GoReactJavaScriptTypeScriptMongoDBPostgreSQLReduxDockerWebSocketEIP-712

Soft Skills

Problem-SolvingCommunication

Tools & Technologies

GitCI/CDOpenAPISwaggerJestReact Testing LibraryTamaguiEthers.jsWagmiNext.js

Industry Keywords

Account AbstractionERC-4337ZK StackL1↔L2 BridgingNFTWebAuthnEIP-1193EIP-6963EIP-5792Smart Contract

Tech Stack

Tools & technologies

CloudDockerJavaScriptJestKubernetesMicroservicesMongoDBNext.jsPostgresReactReact NativeReduxTypeScriptWeb3Go

About the role

Key responsibilities & impact

Develop backend services in Go using go-ethereum/ethkit for wallet operations and blockchain interactions
Implement and monitor the ERC-4337 UserOperation lifecycle against bundlers and paymasters
Implement smart contract interaction layers with abigen-generated Go bindings
Build Account Abstraction support, including paymaster gas sponsorship and session-key issuance
Design BFF services orchestrating data from blockchain sources, indexers, and wallet infrastructure providers
Build responsive React/Next.js applications integrated with embedded/AA wallet SDKs
Implement embedded wallet flows including social authentication, email login, and passkey support
Create Web3-enabled UIs using wagmi and viem according to wallet provider standards
Implement transaction confirmation flows using 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 complete features from smart contract events through UI updates
Handle ZK Stack specifics and L1↔L2 bridging UI flows
Implement transaction tracking, status polling, reorg handling, and user notifications
Create admin panels for NFT drops, marketplace settings, and analytics
Write backend and frontend tests using Go, Jest, and React Testing Library
Document APIs using OpenAPI/Swagger and maintain technical documentation

Requirements

What you’ll need

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
3+ years of experience with React and modern JavaScript/TypeScript
Proficiency in state management solutions such as Redux or Zustand
Experience with responsive design and CSS frameworks
Understanding of web performance optimization
Experience with Git and CI/CD pipelines
Familiarity with Docker and containerization
Strong problem-solving and communication skills
Preferred: Working knowledge of ERC-4337 Account Abstraction, including EntryPoint, UserOperation lifecycle, bundler/paymaster roles
Preferred: Understanding of session keys and delegated permissions (ERC-7710 / ERC-7715), EIP-712, ERC-1271, and WebAuthn/passkey signature schemes
Preferred: Familiarity with wallet provider standards EIP-1193, EIP-6963, and EIP-5792
Preferred: Exposure to embedded/AA wallet SDKs such as Sequence, thirdweb, Privy, Dynamic, or Turnkey
Preferred: Knowledge of ZK Stack/ZKsync Era, EraVM vs EVM differences, L1↔L2 communication, and native Account Abstraction
Preferred: Experience with ethers.js, viem, and wagmi
Preferred: Understanding of smart contract interaction, including ABI, events, and transaction lifecycle
Preferred: Knowledge of ERC-20, ERC-721, and ERC-1155 token standards
Preferred: Experience with Next.js SSR/SSG and App Router
Preferred: Familiarity with React Native and Tamagui
Preferred: Understanding of WebSocket for real-time blockchain events
Preferred: Knowledge of Kubernetes and cloud infrastructure

Benefits

Comp & perks

100% company-paid medical, dental, and vision plans
Unlimited Flexible Time Off
Personalized career roadmap for each employee
Professional development through training and educational opportunities
401(k) retirement plan
Equity participation opportunities
Remote-first culture with flexible collaboration across time zones
Working at the cutting edge of Web3, blockchain, and gaming technology