Guidewire technical lead shaping insurance digital transformation at Alithya. Designing scalable architectures, integrations, cloud migrations, and modernization solutions.
About the role
- Staff Engineer owning smart wallets and account abstraction for Xsolla's Web3 platform. Designing custody, signing, gas sponsorship, and recovery infrastructure for game players.
Responsibilities
- Own the technical strategy and architecture of Xsolla's smart wallet platform, including account model, signing, session management, and gas abstraction
- Design and evolve the ERC-4337 UserOperation 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 fallback behavior
- Own security for the dApp-facing signer surface, including provider behavior, origin-bound sessions, trust tiers, and transaction/signature confirmation
- Lead custody and recovery roadmap, including MPC-based custody, passkeys, guardians, and social recovery
- Drive cross-team decisions on account architecture, SDK contracts, data modeling, and platform reliability
- Identify and resolve systemic risks involving key management, phishing, reorgs, indexer staleness, bundlers, RPC dependencies, and contract upgrades
- Define engineering standards, review critical code/contracts/designs, and provide documentation, tooling, and mentorship
- Collaborate with engineering, product, security, legal, and infrastructure stakeholders
- Serve as escalation point for complex production wallet and account-abstraction issues
- Own the smart wallet and account abstraction layer for Xsolla's Web3 platform, including Xsolla ZK and the wallet embedded in Xsolla App
Requirements
- Deep, hands-on understanding of ERC-4337, including EntryPoint v0.6–v0.8, UserOperation lifecycle, bundlers, paymasters, ERC-7562, gas estimation, counterfactual deployment, and ERC-6492
- Working knowledge of EIP-7702 and its risks
- Experience building on or extending production smart account implementations such as Safe, Kernel, Biconomy, or Coinbase Smart Wallet
- Experience designing session keys, delegated permissions, origin binding, revocation, and ERC-7710/ERC-7715
- Practical command of EIP-712, ERC-1271, WebAuthn/passkeys, 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, reorgs, RPC, and indexer semantics
- Strong Go engineering skills, including idiomatic code, concurrency, and performance profiling
- Ability to design and own TypeScript client-side SDK surfaces
- Distributed systems experience and understanding of consistency, availability, and failure modes
- PostgreSQL schema design, query optimization, and large-scale migrations
- Kubernetes deployment, operations, and debugging
- Kafka or NATS and event-driven messaging patterns
- Git and modern CI/CD practices
- Production key-management experience with Keychain/Keystore, HSMs, MPC, or threshold signing
- Solid wallet threat-modeling knowledge
- 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 in Canada
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