Senior QA Engineer — On-Chain Wallet & Tools

Xsolla; United States; A distancia; USD 120.000 - 180.000; Jornada completa

Descripción de la vacante

Xsolla seeks a Senior QA Engineer to own quality for its smart wallet on Xsolla ZK, an Ethereum-compatible ZK rollup. You will verify on-chain and front-end flows, deploy and test contracts from the command line, and build automated suites. You will mentor others and integrate AI tooling to enhance testing across teams.

You will work in a small, senior team with an external wallet-infrastructure partner. You will validate counterfactual deployment, signing workflows, and cross-chain state,

Formación

• > Bachelor's degree in Computer Science, Software Engineering, Information Systems or a related field (or international equivalent).
• > 6+ years in software testing or quality engineering, including 2+ years of hands-on testing on EVM-based products.
• > Experience with Web3 libraries and tooling (viem, wagmi, ethers.js).
• > Proficiency deploying/interacting with smart contracts from command line (Foundry/Hardhat).
• > Ability to test account-abstraction flows (UserOperations, EntryPoint).
• > Familiarity with chain forking and on-chain state inspection.

Responsabilidades

• > Own the end-to-end test strategy for the wallet and related flows (sign-in, wallet creation, asset display, transfers, and confirmations).
• > Test account-abstraction flows: UserOperation construction, bundler submission, EntryPoint execution, paymaster gas, and session-key behavior.
• > Validate signing end-to-end: personal_sign, EIP-712, and ERC-1271 verification including before deployment.
• > Verify counterfactual deployment using CREATE2 and factory init code across forked/local chains.
• > Deploy and inspect smart contracts from CLI to reproduce defects and set up test state.
• > Use chain-forking and simulation tools to test against real network state without real funds.
• > Validate full transaction lifecycle: broadcast, inclusion, reorgs, finality, and failure paths.
• > Reconcile on-chain state with UI/indexer data and account-to-wallet mappings (Xsolla ID).
• > Test transfers across ERC-20, ERC-721, ERC-1155; handle partial quantities and safe transfers.
• > Write acceptance tests for partner wallet SDKs and report defects with evidence.

Conocimientos

On-chain testing

EVM testing

Test automation

Playwright

CI/CD

Educación

Bachelor's degree in CS/SE

Herramientas

Foundry

Hardhat

Anvil

Tenderly

viem

wagmi

Descripción del empleo

Xsolla seeks a Senior QA Engineer to own quality for its smart wallet on Xsolla ZK, an Ethereum-compatible ZK rollup. You will verify on-chain and front-end flows, deploy and test contracts from the command line, and build automated suites. You will mentor others and integrate AI tooling to enhance testing across teams.

You will work in a small, senior team with an external wallet-infrastructure partner. You will validate counterfactual deployment, signing workflows, and cross-chain state,