Senior QA Engineer (Web3 Applications & Infrastructure)

As a Senior QA Engineer at Xsolla, you lead quality assurance for Web3-enabled features and blockchain integrations across our gaming commerce platform. You bring deep hands-on Web3 testing experience, technical depth in manual and API-level validation, and a proactive mindset for anticipating risks in decentralized systems. You'll work across wallet flows, smart contract interactions, on-chain/off-chain synchronization, and hybrid architectures to ensure seamless experiences for millions of users.

What you'll do

• Lead manual testing of complex Web3 and platform features across multiple environments, validating blockchain interactions, wallet flows such as MetaMask and WalletConnect, and decentralized identity/authentication systems
• Test smart contract interactions, event handling, and on-chain/off-chain data synchronization with precision
• 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
• 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
• 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 such as automated test generation, log analysis, and 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
• 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

What you bring

• 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 such as transactions, gas, confirmations, and RPC endpoints
• Experience validating APIs using Postman or similar tools
• Proficiency with bug tracking systems such as Jira and version control such as Git
• Comfort using browser developer tools and basic terminal/command-line workflows
• Strong verbal and written English communication skills
• Familiarity with AI-powered testing tools such as test case generation, smart prioritization, and AI log analysis

Nice to have

• Experience with wallet testing including MetaMask, Coinbase Wallet, WalletConnect, or custom wallets
• Understanding of smart contracts, Solidity basics, or blockchain debugging tools
• Experience with automated testing frameworks such as Playwright, Cypress, or 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

What we offer

• Latest Mac workplaces plus additional hardware to support your work
• Health insurance covering medical, dental, and optical for you and dependents
• Flexible hours to organize your day according to your needs and sprint and teamwork demands
• Access to professional tools including Google Chat, Gmail, Google Drive, Confluence, Jira, and GitLab
• Rich knowledge exchange opportunities within the company

About Xsolla

Xsolla is a global commerce company providing tools and services to help video game developers fund, distribute, market, and monetize their games. Headquartered in Los Angeles, Xsolla acts as the merchant of record and has helped over 1,500 game developers reach players and grow their businesses worldwide.