Sina Javaheri Mashhadi

Led design and development of the security dashboard at app.fix.security, improving UX and contributing to its acquisition by a major company. Took ownership of key features in the fixfrontend open-source repo, accelerating development, resolving issues, and improving maintainability. Implemented and maintained unit and E2E tests (Jest, Cypress, React Testing Library), ensuring high coverage and reducing regressions.

Developed, refactored, and maintained the main mobile app, boosting performance and stability, leading to a 40% increase in downloads. Reduced crash rates by 30%, increasing user retention by 15%. Integrated robust testing into CI/CD, cutting post-release issues by 25% and improving overall stability. Collaborated closely with product and design teams to deliver features under tight deadlines, reducing delivery time and streamlining onboarding.

Designed a scalable architecture pattern adopted across multiple projects, cutting long-term maintenance overhead. Improved front-end and back-end performance, security, and responsiveness. Established testing routines and CI/CD workflows, boosting deployment reliability and team productivity. Contributed to code reviews and documentation to ensure consistency and knowledge sharing. Mentored junior developers to enhance skills and enforce best practices.

Led frontend development for projects like Sakku and PodSpace using React and TypeScript, from initial setup to production launch. Organized team training and workshops (“Git workflows & best practices”) Mentored junior developers and introduced coding standards that improved long-term maintainability. Contributed to internal tools and workflows, increasing development speed and reducing bugs.