4 months ago
Serbia (city not specified)Senior
Responsibilities
- Design and ship Web2-to-Web3 flows involving custodial and non-custodial wallets, account abstraction, gasless transactions, and fiat on-ramps.
- Build systems for minting, ownership, transfer, trading, and redemption while synchronizing on-chain state with off-chain records.
- Deliver end-to-end features across wallet-connected frontends, backend services, smart contracts, and indexing layers.
- Design data models and APIs representing digital items consistently across databases, wallets, and blockchains.
- Ensure value flows support idempotency, reconciliation, replay safety, and clear recovery paths.
- Integrate EVM chains, token standards, indexers, and marketplace settlement flows behind clean internal interfaces.
- Collaborate with product, security, payments, and game-facing teams and document technical decisions.
Requirements
- Hands-on experience bridging traditional systems with blockchain systems, including wallet onboarding, custody models, account abstraction, and relayed transactions.
- Working knowledge of EVM chains and Solidity, including contract integration and safety reasoning.
- Practical understanding of ERC-20, ERC-721, and ERC-1155 token standards.
- Experience with blockchain indexing, event ingestion, reorganization handling, and on-chain/off-chain reconciliation.
- Strong TypeScript and React skills for production frontend interfaces.
- Experience with wallet connectivity and Web3 client libraries such as wagmi, viem, ethers.js, or WalletConnect.
- Backend development experience with Node.js and Go, including APIs, concurrency, and performance under load.
- Experience with distributed systems and consistency, availability, and failure-mode trade-offs.
- Experience designing and optimizing PostgreSQL schemas, queries, and migrations at scale.
- Experience deploying and debugging services in Kubernetes environments.
- Experience with Kafka or NATS and event-driven delivery patterns.
- Experience using Git and modern CI/CD practices.
- Experience building or operating platforms for game developers, publishers, or players, particularly those involving in-game items, economies, or ownership.
- Preferred experience includes NFT marketplaces, blockchain indexing tools, node or RPC infrastructure, ERC-4337, smart wallets, paymasters, relayers, payments, fiat on-ramps, non-EVM ecosystems, cross-chain systems, digital-asset security, open-source Web3 projects, or AI coding tools.
Benefits
- Unlimited flexible time off.
- Personalized career roadmap.
- Professional development through training and educational opportunities.
- Comprehensive benefits supporting physical, mental, and emotional well-being.
- Background checks may be conducted after the final interview where permitted by law.
Tech Stack
Categories
About Xsolla
Xsolla builds commerce and monetization infrastructure for video games, offering payment processing, merchant-of-record services, storefronts, subscriptions, and anti-fraud tools for developers and publishers. The privately held company, founded in 2005 and headquartered in Sherman Oaks, California, supports direct-to-consumer sales and global tax/compliance across many regions and payment methods. Its platform targets studios from indie to AAA and powers distribution, marketing, and in-game purchases.