Senior Web3 QA Automation Engineer for European Client

Further Details

This is a premier opportunity for a skilled QA Automation Engineer with a focus on Web3 development, situated in the beautiful Comunidad Valenciana, Spain. JR Spain, acting as a liaison for Braintrust, seeks professionals with 3-5 years of dedicated experience in quality assurance and automated testing. Candidates will be expected to demonstrate a robust ability in test-case design, execution, and regression testing for web and mobile platforms. Essential to this role is a deep understanding of Web3 functionalities, encompassing wallet integrations, on-chain transactions, and smart contract validation. Experience with third-party integrations is highly valued. Ideal applicants possess strong written English, a collaborative spirit for working with global teams, and practical scripting skills in TypeScript, JavaScript, or Python. This position offers a path for significant professional growth in the cutting-edge Web3 space.

Senior Web3 QA Automation Engineer - Europe

JR Spain, representing Braintrust, is actively seeking a highly skilled Senior QA Automation Engineer to join their team in Comunidad Valenciana, Spain. This role is ideal for professionals with 3-5 years of comprehensive experience in quality assurance and a specialized focus on Web3 technologies. The position offers a fantastic opportunity to work on cutting-edge projects within the blockchain and decentralized application space.

The ideal candidate will possess a strong foundation in both manual and automated testing, with a proven ability to design and execute robust test cases. Experience with core Web3 flows, including wallet connections (MetaMask, TrustWallet, WalletConnect), transaction signing, and smart contract testing, is paramount. Furthermore, candidates should be comfortable with end-to-end testing of third-party and exchange integrations.

• Key Requirements: 3-5 years of QA/quality engineering experience, proficiency in manual/automated testing, expertise in Web3 flows, smart contract testing, strong English communication, and scripting skills in TypeScript/JavaScript/Python.
• Nice-to-Haves: Experience with Playwright/Cypress, CI/CD environments, testnets, AI dev tools, and prior startup experience.
• Location: Comunidad Valenciana, Spain.

Detailed Job Positions Table:

Sr.#	Job Title	Required Qualifications	Location	Experience	Salary Range	Vacancies	Age Limit
1	Senior QA Automation Engineer – Web3	Bachelor	Comunidad Valenciana, Spain	3-5 years		1

Skills

• 3-5 years in QA/quality engineering
• Hands-on with manual and automated testing
• Solid test-case design and execution
• Regression testing discipline
• Working knowledge of core Web3 flows (wallet connections, transaction signing)
• Smart contract and wallet testing experience
• Experience testing third-party/exchange (CEX) integrations end to end
• Comfortable setting up and managing test accounts, credentials, and environments
• Clear, reproducible bug reporting and tracking in Linear (or Jira)
• Strong written English communication skills
• Ability to collaborate across US/Europe/India time zones
• Scripting ability in TypeScript, JavaScript, or Python at a working level
• Experience testing web and mobile apps
• Cross-browser and cross-device verification

Duties and Responsibilities:

• Design, execute, and manage test cases for web and mobile applications
• Conduct thorough regression testing to ensure application stability
• Verify core Web3 functionalities, including wallet integrations and transaction signing
• Perform end-to-end testing of third-party and exchange integrations
• Set up and manage test accounts, credentials, and testing environments
• Report bugs clearly and reproducibly with detailed steps and evidence
• Collaborate effectively with international teams across different time zones
• Utilize scripting skills to automate testing processes
• Contribute to the continuous improvement of testing strategies and methodologies

How to apply

• 💼 Prepare your comprehensive Curriculum Vitae (CV) highlighting your relevant experience in QA automation, Web3 technologies, and scripting.
• 🎓 Ensure your qualifications, including your Bachelor's degree and specific certifications, are clearly detailed.
• 🔎 Review the essential requirements: 3-5 years of QA experience, manual and automated testing skills, Web3 flow knowledge (wallet connections, smart contracts), and scripting proficiency (TypeScript, JavaScript, Python).
• 📝 Craft a compelling cover letter that emphasizes your suitability for the role and your understanding of the Web3 ecosystem.
• 🌐 Navigate to the official Eurojobs application portal via the provided link.
• 👉 Locate and click on the 'Apply Now' button for the Senior QA Automation Engineer – Web3 position.
• 📩 Complete the online application form accurately and submit all requested documentation.
• ⏳ Adhere strictly to the closing date for applications: 18 December 2026.
• 📌 You can copy the job link and share it directly with colleagues or friends who might be interested.