Xsolla

Xsolla

Xsolla is an international payment solution provider for online games, offering tools to launch, monetize, and scale games worldwide with local payment methods and fraud prevention.

Internet Software & Services
251-1K
Founded 2005

Description

  • Own the architecture and technical strategy for smart wallets, account abstraction, signing, sessions, and gas abstraction.
  • Design and evolve ERC-4337 user operations, EIP-7702 delegation, deterministic account derivation, and session-key permissions.
  • Set paymaster and gas-sponsorship policies, including metering, abuse prevention, and fallback behavior.
  • Define the security model for dApp integrations, wallet providers, transaction confirmations, and signature approvals.
  • Lead custody and recovery initiatives, including migration toward MPC custody and passkey, guardian, and social recovery options.
  • Drive cross-team decisions across wallet, marketplace, SDK, mobile, infrastructure, security, product, and legal teams.
  • Identify and mitigate risks involving key management, phishing, chain reorganizations, indexers, bundlers, RPCs, and contract upgrades.
  • Set engineering standards, review critical code and designs, write RFCs, mentor engineers, and build internal tooling.
  • Serve as the escalation point for complex production wallet and account abstraction issues.

Requirements

  • Deep hands-on expertise with ERC-4337, including EntryPoint v0.6-v0.8, UserOperations, bundlers, paymasters, ERC-7562, gas estimation, counterfactual deployment, and ERC-6492.
  • Working knowledge of EIP-7702, delegation risks, and its interaction with ERC-4337 EntryPoint v0.8.
  • Experience building or extending production smart accounts such as Safe, Kernel, Biconomy, or Coinbase Smart Wallet, plus familiarity with ERC-7579 or ERC-6900.
  • Experience designing session keys, scoped permissions, origin binding, revocation, and ERC-7710 or ERC-7715 standards.
  • Fluency with Solidity, EVM architecture, EIP-712, ERC-1271, WebAuthn/passkeys, EIP-1193, EIP-6963, EIP-5792, and ERC-7677.
  • Experience operating production wallets or account abstraction systems where bugs could result in lost funds.
  • Strong Go skills, including idiomatic code, concurrency, and performance profiling; ability to design TypeScript SDKs.
  • Experience with distributed systems, PostgreSQL, Kubernetes, Kafka or NATS, Git, and CI/CD.
  • Knowledge of key management, HSMs, MPC or threshold signing, wallet threat modeling, and L2 execution differences.
  • Proven ability to lead multi-quarter initiatives, influence architecture across teams, and communicate through effective RFCs and design documents; gaming, zkSync, custody, compliance, NFT infrastructure, mobile wallet, or AI-tool experience is preferred.

Interested in this position?

Apply directly on the company website

Apply Now

Similar Roles

[Job-31965] Principal FDE

CI&T 5K-10K Internet Software & Services

CI&T is seeking a Principal Forward Deployed Engineer to lead complex legacy-system modernization initiatives, combining architecture leadership, hands-on engineering, and AI-assisted development from initial assessment through delivery.

2 days, 2 hours ago

Principal Engineer, Reach

Riverside Insights 51-250 Diversified Consumer Services

Riverside Insights is seeking a hands-on principal-level technical leader to build and scale a regulated, enterprise assessment platform that supports millions of students and launches by 2028.

AWS HIPAA Machine Learning Microservices Terraform
2 days, 3 hours ago

Team Lead, Sales Development

Level Access 251-1K Internet Software & Services

Level Access is seeking an SDR Team Lead to coach and develop a Sales Development team, improve outbound execution, and support pipeline generation for its accessibility-focused business.

Salesforce
3 days, 2 hours ago

Team Lead, Design

Level Access 251-1K Internet Software & Services

Level Access is hiring a Team Lead, Design to direct visual identity and design operations while leading a small international team delivering consistent print and digital work.

Design Systems Figma
3 days, 2 hours ago

You're on a roll! Sign up now to keep applying.

Sign Up

Already have an account? Log in

Used by 14,729+ remote workers