Xsolla logo
Xsolla

Xsolla is a global gaming technology company whose platform is used by game developers and publishers to streamline operations and “bring their games to the w

Web3 Fullstack Engineer

Location

Serbia

Posted

1 day ago

Salary

0

Seniority

Senior

Job Description

Web3 Fullstack Engineer

Xsolla

• 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.

Job Requirements

  • 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.
  • 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 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.
  • 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.
  • Gaming Industry Experience — Experience building or operating platforms for game developers, publishers, or players — especially anything touching in-game items, economies, or ownership.

Benefits

  • Health insurance
  • Flexible working hours
  • Professional development opportunities

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