William Hirohi

Quezon CITY, Metro Manila- William Hirohi Results-driven Full-Stack developer with over 9 years of experience in designing and developing sophisticated web applications and system architectures. Adept at leveraging React, Django, and modern backend frameworks to build scalable, high-performance solutions. Strong leadership skills in guiding development teams, setting architectural guidelines, and driving best coding practices. Proven ability to design and implement microservices, REST APIs, and cloud-based infrastructures to optimize business operations. SKILLS Frontend ●​ ●​ React, Next.js, Vue, Angular, JavaScript/TypeScript, Tailwind CSS, Webpack Responsive UI/UX Design, Pixel-Perfect Backend ●​ ●​ Python, Django, Node, Express, Laravel, C#, ASP.NET Flask, FastAPI, Authentication(JWT, OAuth), Web Sockets Database MongoDB, PostgreSQL, MySQL, Firebase ​ Architecture & DevOps Microservices, RESTful APIs, Docker, AWS(EC2, S3, SQS), GCP(Bigquery, Cloud, etc.), Azure, CI/CD Pipelines Tools & Other Skills ●​ ●​ Git, GitHub, Agile/Scrum Test-Driven Development, Code Reviews, Design Patterns EXPERIENCE SDLC Corp, Austin, TX, USA — Full Stack Lead Engineer AUGUST 2021 - PRESENT ●​ ●​ ●​ ●​ ●​ Spearheaded the development of a microservices-based architecture, improving scalability and maintainability by 33.7%. Led a team of 10+ developers, ensuring adherence to best practices, code integrity, and architectural guidelines. Designed and optimized RESTful APIs to facilitate seamless data exchange between frontend and backend systems. Implemented CI/CD pipelines to automate deployments using Docker, reducing deployment time by 57.3%. Diagnosed and resolved critical production issues, significantly improving system reliability, uptime, and overall performance stability. Cambria Software, Manila, Philippines — Full Stack Engineer AUGUST 2019 - JULY 2021 ●​ ●​ ●​ ●​ ●​ Developed robust backend systems with Django and Python, improving application performance by 34.8%. Enhanced frontend application responsiveness with React.js, reducing load times by 29.5%. Designed and implemented NoSQL database solutions (MongoDB) to optimize data handling and scalability for high-volume applications, and robust authentication strategies (JWT, OAuth), strengthening security compliance and enhancing access control mechanisms. Led migration of monolithic applications to microservices, improving scalability and fault tolerance by 32.1%. Optimized API development cycle by 40% through the creation of comprehensive documentation and standardized protocols, facilitating seamless integration with five key third-party services while enhancing team collaboration. Cybozu Inc, Osaka, Japan — Frontend Developer SEPTEMBER 2016 - APRIL 2019 ●​ ●​ ●​ ●​ ●​ Developed and deployed over 100 production-grade components using React and TypeScript, enhancing system functionality and performance. Implemented performance optimizations resulting in a 24.6% improvement in page load times. Established frontend coding standards and conducted code reviews to ensure quality and maintainability. Collaborated with backend engineers to refine API integration and improve application efficiency. Developed technical workflows to educate and train new hires, reducing onboarding time by 28%. Fenrir Inc, Osaka, Japan — Junior Frontend Developer MAY 2015 - AUGUST 2016 ●​ ●​ ●​ ●​ ●​ Assisted in the development and maintenance of client websites, ensuring consistent user experience across different browsers and devices. Diagnosed and resolved UI-related issues, significantly enhancing application stability and user experience. Participated in Agile sprints, actively collaborating with senior developers and product teams to design and implement responsive, user-friendly interfaces using HTML, CSS, JavaScript, and TypeScript. Gained experience with version control, CI/CD, and basic API integration, strengthening development workflow. Engaged in team meetings and sprint planning, collaborating with designers, product managers, and backend developers to meet project deadlines. EDUCATION Osaka University, Japan — Bachelor’s Degree in Computer Science SEPTEMBER 2010 - OCTOBER 2014, LOCATION ●​ ●​ ●​ Language C/C++ Data Structure & Algorithm Web Development Software Engineering