Staff Software Engineer Smart Wallet & Account Abstraction
Remote · Full-time · Remote · Posted Oct 2, 2026
At a glance
- Employment
- Full-time
- Workplace
- Remote
- Location
- Remote
About Xsolla
- Xsolla is a global commerce company with robust tools and services to help developers solve the inherent challenges of the video game industry. From indie to AAA, companies partner with Xsolla to help them fund, distribute, market, and monetize their games. Grounded in the belief in the future of video games, Xsolla is resolute in the mission to bring opportunities together, and continually make new resources available to creators. Headquartered and incorporated in Los Angeles, California, Xsolla operates as the merchant of record and has helped over 1,500+ game developers to reach more players and grow their businesses around the world. With more paths to profits and ways to win, developers have all the things needed to enjoy the game.
- For more information, visit xsolla.com.
About the role
- Xsolla is looking for a Staff Software Engineer to own the smart wallet and account abstraction layer of the company's Web3 platform.
- This is an individual contributor role acting as the technical anchor for how millions of players get an on-chain account.
- The engineer will own the account model behind Xsolla ZK and the wallet inside the Xsolla App, driving strategy, architecture, and technical execution.
Responsibilities
- Own the technical strategy and architecture of the smart wallet platform, covering the account model, signing, session management, and gas abstraction at scale.
- Design and evolve the ERC-4337 user operation lifecycle, EIP-7702 delegation, deterministic address derivation from identity, and session-key and permission primitives.
- Set the paymaster and gas-sponsorship strategy, including metering, capping, abuse defense, and degradation handling.
- Own the security model for the dApp-facing surface, including EIP-1193 / EIP-6963 provider behavior, origin-bound and policy-versioned sessions, trust tiers, and transaction confirmation flows.
- Lead the custody roadmap from interim mechanisms toward MPC-based custody and design recovery paths like passkeys, guardians, and social recovery.
- Drive decisions on account architecture, SDK contracts, data modeling, and platform reliability across multiple teams.
- Identify systemic risks proactively and lead initiatives to resolve them before they become incidents.
- Define engineering standards, review critical code, contracts, and designs, and create leverage through documentation, tooling, and mentorship.
- Collaborate with product, security, legal, and infra teams to align on roadmap and translate business and regulatory needs into technical plans.
- Serve as the go-to escalation point for complex production issues in the wallet and account abstraction domain.
Requirements
- Deep, hands-on understanding of ERC-4337 including EntryPoint (v0.6 through v0.8), UserOperation lifecycle, bundler and paymaster roles, validation rules (ERC-7562), and signature validation for undeployed accounts (ERC-6492).
- Working knowledge of EOA delegation (EIP-7702), its interaction with ERC-4337 EntryPoint v0.8, and associated trade-offs and risks.
- Experience building on or extending production smart account implementations like Safe, Kernel, Biconomy, or Coinbase Smart Wallet, and familiarity with modular account standards (ERC-7579 / ERC-6900).
- Experience designing scoped, time-limited, policy-bound authority such as session keys with TTL and contract allowlists, origin binding, and delegated-permission standards.
- Practical command of EIP-712 typed data, ERC-1271 contract signatures, WebAuthn / passkey (P-256) signers, and wallet-facing standards including EIP-1193, EIP-6963, EIP-5792 batched calls, and ERC-7677 paymaster interfaces.
- Experience designing or operating a production smart wallet or account abstraction system serving real users and real value.
- Substantial engineering experience at a large crypto product or protocol organization or comparable wallet, exchange, or account-abstraction infrastructure team.
- Ability to read, review, and write account, paymaster, and module contracts in Solidity with gas-aware design and upgradeability patterns.
- Strong Go (Golang) engineering skills including idiomatic code, concurrency patterns, and performance profiling.
- Hands-on experience with key material in production, platform secure storage, HSMs, MPC or threshold signing, and operational discipline.
Workplace
- Operates across multiple time zones
Skills
- Solidity
- Go
- TypeScript
- PostgreSQL
- Kubernetes
- Kafka
- NATS
- Git
- ERC-4337
- EIP-7702
- EIP-712
- EIP-1193
Show all 15 skills
- WebAuthn
- React Native
- Expo
