• Engineered a containerized PostgreSQL database on Docker images, addressing data storage and retrieval for users' historical metric data while enforcing strict schema to enhance querying speed.• Designed a robust backend using Express, leveraging routing and middleware capabilities to create modular and concise code, enabling integration with Docker for container, image, and volume management.• Integrated TypeScript with custom types to improve type safety, streamline error handling, and enhance development efficiency, achieving 95% coverage and reducing runtime errors.• Implemented a comprehensive testing suite using Jest and Docker DIND containers; improving component predictability, and identifying potential errors and issues pre-build, with 100% back-end coverage.• Developed CircleCI for efficient build and test processes, assuring errors were caught across 300+ commits within 4 weeks; empowering developers with confidence in the application's stability and functionality.• Optimized development workflow by implementing Husky bash scripts, ensuring 100% adherence to best practices for commit branches and messages; streamlined agile workflow applications.• Led the implementation of Cloudflare's domain services and workers, leveraging the power of the Wrangler package for static site hosting achieving 100% uptime and reducing bandwidth consumption by 23% over 30 days.

• Implemented Go (Golang) to optimize API performance, achieving an extraordinary 85% reduction in average response time, resulting in a high-speed API with an average response time of just 45 milliseconds.• Optimized React's modular design while achieving 94% code reusability and a simplified development process, leveraging React's Virtual DOM for swift component reloading.

• Architected a MongoDB database to optimize user content storage utilizing the document-like structure and Mongoose schema to enforce data consistency, enhance system responsiveness, and improve user experience.• Led Implementation of Bcrypt with a security-first mindset to develop a robust authentication service, enhancing user password security against brute-force attacks by 2900% by incorporating Bcrypt's Salt work factor.

• Spearheaded Postgres integration, utilizing SQL's ACID-compliant consistency and integrity to store API and user data, resulting in backend efficiency and seamless data consistency across all user interactions.• Engineered Express routes and middleware design patterns to seamlessly retrieve and parse data from databases and APIs, resulting in streamlined frontend data utilization and improved user experience.