Responsibilities
Build Seamless Web2 ↔ Web3 Integration — Design and ship the flows that let users move between traditional accounts/payments and on-chain wallets without friction: custodial and non-custodial wallets, account abstraction, gasless transactions, and fiat on-ramps.
Own the Digital Item Lifecycle — Build the systems behind item mint, ownership, transfer, trading, and redemption — keeping on-chain state and off-chain records consistent, auditable, and fast.
Develop Fullstack Features — Deliver end to end across wallet-connected frontends, backend services, and the smart contract / indexing layer that powers item ownership and turnover.
Model Items & Ownership — Design data models and APIs that represent items uniformly whether they live off-chain, in a custodial wallet, or on-chain, and keep them in sync.
Ensure Reliability of Value Flows — Anything that moves items or money must be correct under failure: idempotency, reconciliation, replay safety, and clear recovery paths.
Integrate Blockchains & Marketplaces — Interact with EVM chains, token standards, indexers, and marketplace/settlement flows; abstract their differences behind clean internal interfaces.
Collaborate Across Teams — Work with product, security, payments, and game-facing teams to turn business needs into well-scoped technical plans, and document decisions so they stand on their own.
What You Bring
Web3 & Digital Assets
Web2 ↔ Web3 Integration — Hands-on experience bridging traditional systems with on-chain ones: wallet onboarding, custodial vs. non-custodial trade-offs, account abstraction, gasless/relayed transactions.
EVM & Smart Contracts — Working knowledge of EVM chains and Solidity, including reading, integrating with, and reasoning about the safety of contracts.
Token & Item Standards — Practical understanding of ERC-20, ERC-721, and ERC-1155, and how they map to real game items, ownership, and transfers.
On-chain / Off-chain Sync — Experience keeping blockchain state consistent with off-chain databases: indexing, event ingestion, reorg handling, and reconciliation.
Frontend Engineering
TypeScript & React — Strong TypeScript and React skills for building responsive, production-grade interfaces.
Wallet Integration — Experience with wallet connectivity and web3 client libraries (e.g. wagmi, viem, ethers.js, WalletConnect) and embedded/social login wallets.
Backend Engineering
Backend Services — Solid backend skills in Node.js and Go: clean APIs, concurrency, and performance under load.
Distributed Systems — Experience with distributed systems and their trade-offs (consistency, availability, failure modes), especially where correctness of value transfer matters.
Data & Infrastructure
PostgreSQL — Schema design, query optimization, and migrations at scale.
Kubernetes — Deploying, operating, and debugging services in a k8s environment.
Message Streaming — Kafka or NATS — event-driven patterns, consumer groups, at-least-once delivery.
Git & CI/CD — Git and modern CI/CD practices.
Domain Context
Gaming Industry Experience — Experience building or operating platforms for game developers, publishers, or players — especially anything touching in-game items, economies, or ownership.
Nice to Have
Experience building NFT marketplaces, item trading, or secondary-market / settlement systems
Familiarity with blockchain indexing tooling (The Graph, custom indexers) and node/RPC infrastructure
Experience with account abstraction (ERC-4337), smart wallets, or paymaster/relayer setups
Background in payments or fiat on-ramp integration bridging traditional commerce and crypto
Experience with non-EVM ecosystems (Solana, etc.) or cross-chain / bridging patterns
Familiarity with security and compliance relevant to digital assets: custody, key management, audit logging, KYC/AML touchpoints
Contributions to open-source web3, wallet, or tooling projects
Hands-on, up-to-date experience with modern AI tools (e.g. Claude, Copilot, Cursor) for code generation, review, and accelerating day-to-day engineering work
How We Work
Xsolla operates across multiple time zones, and the systems you build sit directly in the path of real value moving between users, games, and chains. Strong written communication is essential — your designs and decisions need to stand on their own and be actionable without you in the room.
We value directness, technical depth, and follow-through. If a design or production issue has real security, correctness, or reliability implications — especially anything touching item ownership or the movement of value — we expect you to say so clearly, defend your position with evidence, and stay engaged until it’s resolved.