Senior QA Engineer (Web3 Applications & Infrastructure)

ABOUT YOU We are looking for a Senior QA Engineer with strong Web3 experience to join our engineering team. You are meticulous, technically sharp, and deeply curious about decentralized technologies. You understand the nuances of blockchain interactions, wallet integrations, smart contract behavior, and hybrid on‑chain/off‑chain systems.   You thrive in fast‑paced, agile environments and bring a proactive approach to quality—anticipating risks, validating distributed systems, and ensuring seamless user experiences across Web3‑enabled features. You are confident in manual testing, comfortable with API‑level validation, and eager to integrate AI‑driven testing tools to improve coverage, speed, and defect detection.   If you’re excited to shape quality practices for blockchain‑enabled products and help define how Web3 experiences should feel for millions of users, we’d love to meet you.   ABOUT US 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.

Responsibilities

Core QA Ownership

Lead manual testing of complex Web3 and platform features across multiple environments

Validate blockchain interactions, wallet flows (e.g., MetaMask, WalletConnect), and decentralized identity/authentication

Test smart contract interactions, event handling, and on‑chain/off‑chain data synchronization

Drive exploratory, functional, and regression testing using structured documentation and deep product knowledge

Identify, log, and track reproducible issues with precision using Jira or similar tools

 

Web3‑Specific Quality Work

Verify blockchain node responses, RPC interactions, and event‑driven workflows

Validate transaction signing, wallet authentication, and multi‑chain compatibility

Collaborate with engineers to test smart contract upgrades, migrations, and versioning

Monitor production logs, blockchain explorers, and analytics dashboards to detect anomalies

 

Process & Tooling

Create and maintain detailed test cases, checklists, and QA documentation

Collaborate with engineering and DevOps teams to ensure reliable CI/CD test coverage for Web3 components

Evaluate and integrate AI‑powered testing tools (e.g., automated test generation, log analysis, visual regression)

Set up and manage test environments, staging pipelines, and job configurations

Conduct load, stress, and performance testing—especially around high‑volume Web3 interactions

 

Quality Leadership

Act as a quality advocate across sprint planning, reviews, and release cycles

Mentor junior QA engineers and promote a culture of proactive quality ownership

Contribute to best practices for testing decentralized systems and hybrid architectures

Qualifications & Skills

Required

Minimum 7 years of total QA experience, including ownership of end‑to‑end quality

At least 2 years of hands‑on Web3 testing experience, covering blockchain integrations, wallet flows, or decentralized systems

Strong understanding of manual testing methodologies and defect life cycle

Familiarity with blockchain fundamentals (e.g., transactions, gas, confirmations, RPC endpoints)

Experience validating APIs using Postman or similar tools

Proficiency with bug tracking systems (e.g., Jira) and version control (e.g., Git)

Comfortable using browser developer tools and basic terminal/command‑line workflows

Strong verbal and written English communication skills

Familiarity with AI‑powered testing tools (e.g., test case generation, smart prioritization, AI log analysis)

Good to Have

Good to Have

Experience with wallet testing (MetaMask, Coinbase Wallet, WalletConnect, custom wallets)

Understanding of smart contracts, Solidity basics, or blockchain debugging tools

Experience with automated testing frameworks (Playwright, Cypress, Selenium)

Knowledge of backend technologies, APIs, and familiarity with PHP or related languages

Experience working in Linux environments and using Bash scripting

Hands‑on experience with AI platforms used in QA contexts