Joseph Karimi

QA Automation Engineer with 6+ years of experience designing and implementing scalable test automation frameworks for web and mobile applications. Proven track record of reducing production bugs by 35% and cutting regression testing time by 50% through CI/CD-integrated automation. Strong background in systems development, API integrations and high-volume fintech systems.

Skilled in Playwright, Cypress, Appium and performance testing tools such as JMeter and Locust. Adept at collaborating with cross-functional teams to deliver reliable, secure, and high-quality software in fast-paced environments.a

QA Automation Engineer at Vibes meet LLC (2022-01 – 2026-04)

• Designed and implemented scalable test automation frameworks for web and mobile applications using Appium, Playwright and Cypress
• Reduced critical production bugs by 35% through early defect detection
• Cut regression testing time by 50% via automated test pipelines
• Integrated automated testing into CI/CD pipelines, improving release speed and reliability
• Led end-to-end testing: functional, regression, performance, and integration
• Collaborated with developers, product managers, and designers to ensure product quality
• Mentored junior QA engineers and improved team testing standards

Full Stack Software Engineer at Tradco Africa Limited (2020-02 – 2022-11)

• Developed TradePayer Payment System integrating MPesa and banking APIs
• Built and maintained scalable backend services and APIs
• Designed and optimized databases for performance and data integrity
• Integrated third-party services (payments, SMS, email APIs)
• Automated workflows, improving operational efficiency

Fullstack Software Engineer at Safaricom PLC (2016-02 – 2019-01)

• Built and maintained secure fintech applications handling high-volume transactions
• Developed APIs for payment processing and wallet systems
• Implemented authentication, encryption, and security best practices
• Optimized system performance for peak transaction loads
• Contributed to CI/CD pipelines and automation processes

Bachelor of Science in Information Technology – MKU University (2014-01 – 2017-01)

Certificate in Software Development – East Africa Institute of Satisfied Studies (2012-01 – 2013-01)