Staff Software Engineer – Smart Wallet, Account Abstraction

🔥 19 hours ago

🇷🇺 Russia – Remote

⏰ Full Time

🔴 Lead

🧑‍💻 Full-stack Engineer

👻 Ghost score 21%

What it means: how likely this posting is sitting open without active hiring.How to read it: 60% or higher means we think this is a ghost. Lower scores are less of a worry.How we score it: age, reposts, open roles vs team size, how fast jobs close, and whether pay is listed.Fine print: an estimate from public data, not a judgment of the company. Real jobs can score high, so treat it as a hint, not a fact.

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Xsolla

WebsiteLinkedInAll Job Openings

201 - 500 employees

Founded 2005

💼 Consulting

📣 Marketing

📦 Logistics

Consulting • Marketing • Logistics

Xsolla is a company specializing in game commerce solutions. It provides tools and services that empower video game developers to monetize, distribute, and fund their games, helping them to increase revenue at any stage of development. Xsolla offers a wide range of solutions such as customizable web shops, payment processing, fraud prevention, and social packages to enhance player engagement. With over 19 years of experience in the video game industry, Xsolla collaborates with developers and publishers globally to manage compliance, taxes, and operational complexities, allowing them to focus on connecting with their players. Their services are designed to work with popular game development platforms like Unity, Unreal, and Cocos Creator, supporting a wide array of local payment methods worldwide.

📋 Description

• Own the technical strategy and architecture of Xsolla's smart wallet platform, including account model, signing, session management, and gas abstraction • Design and evolve ERC-4337 user-operation lifecycle, EIP-7702 delegation, deterministic identity-based address derivation, session keys, and permission primitives • Set paymaster and gas-sponsorship strategy, including metering, caps, abuse prevention, and degraded operation • Own security of the dApp-facing signer surface, including provider behavior, origin-bound sessions, trust tiers, and transaction/signature confirmation flows • Lead custody roadmap toward MPC-based custody and design recovery paths using passkeys, guardians, and social recovery • Drive account architecture, SDK contracts, data modeling, and platform reliability decisions across wallet, marketplace, SDK, mobile, and security teams • Identify and resolve systemic risks involving key management, phishing, reorgs, indexer staleness, bundlers, RPC dependencies, and contract upgrades • Define engineering standards and review critical code, contracts, and designs • Create leverage through documentation, tooling, and mentorship • Collaborate with product, security, legal, and infrastructure teams on roadmap and regulatory needs • Serve as escalation point for complex production wallet and account-abstraction issues • Own the account model behind Xsolla ZK, its zkSync-based L2, and the wallet embedded in Xsolla App • Support Web3 capabilities including minting, gifting, marketplace trading, reward airdrops, gas sponsorship, and dApp access

🎯 Requirements

• Deep, hands-on understanding of ERC-4337, including EntryPoint v0.6–v0.8, UserOperation lifecycle, bundlers, paymasters, ERC-7562 validation rules, gas estimation, counterfactual deployment, and ERC-6492 signature validation • Working knowledge of EIP-7702, EOA delegation, EntryPoint v0.8 interactions, and associated risks • Experience building on or extending production smart account implementations such as Safe, Kernel, Biconomy, or Coinbase Smart Wallet • Familiarity with modular account standards ERC-7579 and ERC-6900 • Experience designing session keys and delegated permissions, including TTLs, contract allowlists, origin binding, revocation, ERC-7710, and ERC-7715 • Practical command of EIP-712, ERC-1271, WebAuthn/passkeys with P-256, EIP-1193, EIP-6963, EIP-5792, and ERC-7677 • 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 • Experience operating systems where bugs could cause lost funds, with concrete guardrails, reviews, and rollback paths • Ability to read, review, and write Solidity account, paymaster, and module contracts • Gas-aware design, upgradeability and migration patterns, and experience with external auditors • Understanding of L2 execution differences, zkSync-family chains, transaction and fee models, finality, reorg behavior, RPC, and indexer semantics • Strong Go engineering skills, including idiomatic code, concurrency patterns, and performance profiling • Ability to design and own client-side TypeScript SDK surfaces • Distributed systems experience and understanding of consistency, availability, failure modes, and on-chain/off-chain reconciliation • PostgreSQL schema design, query optimization, and large-scale migrations • Kubernetes deployment, operations, and debugging • Kafka or NATS event-driven patterns, consumer groups, and at-least-once delivery • Git and modern CI/CD practices • Hands-on production key-management experience with Keychain/Keystore, HSMs, MPC, or threshold signing • Solid understanding of wallet threats, including phishing, malicious dApp origins, replay attacks, token approval abuse, paymaster griefing, and DoS • Proven ability to lead multi-quarter technical initiatives across teams • Track record of influencing architecture and standards beyond the immediate team • Strong written and verbal communication; ability to write effective RFCs and design documents

🏖️ Benefits

• Full-time employment • Remote work arrangement