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Hi there! I'm David Alexander Widjaya Surabaya, a versatile software engineer and product-minded team lead based in Surabaya, Indonesia. I design and build scalable web and mobile platforms, delivering MVPs, robust APIs, and delightful user experiences for startups and growing teams. I thrive in fast-paced environments, leading cross-functional teams from idea to production. I enjoy turning complex challenges into clean, maintainable code and helping organizations scale with reliable infrastructure and measurable results.…Hi there! I'm David Alexander Widjaya Surabaya, a versatile software engineer and product-minded team lead based in Surabaya, Indonesia. I design and build scalable web and mobile platforms, delivering MVPs, robust APIs, and delightful user experiences for startups and growing teams. I thrive in fast-paced environments, leading cross-functional teams from idea to production. I enjoy turning complex challenges into clean, maintainable code and helping organizations scale with reliable infrastructure and measurable results.

David Alexander Widjaya Surabaya

Full Stack Developer, App Developer, Web Developer, +2

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Hi there! I'm David Alexander Widjaya Surabaya, a versatile software engineer and product-minded team lead based in Surabaya, Indonesia. I design and build scalable web and mobile platforms, delivering MVPs, robust APIs, and delightful user experiences for startups and growing teams. I thrive in fast-paced environments, leading cross-functional teams from idea to production. I enjoy turning complex challenges into clean, maintainable code and helping organizations scale with reliable infrastructure and measurable results.…Hi there! I'm David Alexander Widjaya Surabaya, a versatile software engineer and product-minded team lead based in Surabaya, Indonesia. I design and build scalable web and mobile platforms, delivering MVPs, robust APIs, and delightful user experiences for startups and growing teams. I thrive in fast-paced environments, leading cross-functional teams from idea to production. I enjoy turning complex challenges into clean, maintainable code and helping organizations scale with reliable infrastructure and measurable results.

Available to hire

Hi there! I’m David Alexander Widjaya Surabaya, a versatile software engineer and product-minded team lead based in Surabaya, Indonesia. I design and build scalable web and mobile platforms, delivering MVPs, robust APIs, and delightful user experiences for startups and growing teams.

I thrive in fast-paced environments, leading cross-functional teams from idea to production. I enjoy turning complex challenges into clean, maintainable code and helping organizations scale with reliable infrastructure and measurable results.

Skills

Experience Level

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Expert

Intermediate

Intermediate

Intermediate

Intermediate

Language

English

Advanced

Indonesian

Intermediate

Work Experience

Information Technology Team Lead at Hi-Fella

December 20, 2023 - Present

Structured and organized API endpoint documentation in Postman, clarifying request body rules, response examples, and mapping unused APIs. Oversaw project execution, ensuring smooth progress aligned with timelines, business owner expectations, and stakeholder requirements. Improved server performance by deploying on Alibaba Cloud ECS, establishing separate staging and production environments, implementing Docker for service isolation, and migrating from Apache 2 to Nginx to optimize infrastructure based on projected product scale. Monitored Jira boards (Sprint, Defect, and PR submissions), ensuring alignment with QA testing results and Product Manager requirements. Created and maintained documentation for platform notices.

Mobile Developer at Hi-Fella

December 20, 2023 - October 17, 2025

Integrated Google Analytics to support marketing and ads performance tracking. Led end-to-end deployment of apps on Google Play and the App Store, including internal testing via APK and TestFlight using staging environments. Enhanced code quality by implementing reusable components, React Hooks, and MobX for state management. Diagnosed and resolved issues across Android and iOS platforms to ensure a smooth user experience.

Mobile Developer at Hi-Fella

December 20, 2023 - October 17, 2025

Designed and implemented RESTful APIs using Laravel to enable robust communication between front-end and back-end, including internal API testing workflows via Android and iOS environments. Improved code quality and maintainability with reusable components, React Hooks, and MobX for state management. Integrated Google Analytics for marketing and ads performance tracking. Diagnosed and resolved cross-platform issues on Android and iOS, ensuring smooth user experience. Developed unit tests with Jest, supported end-to-end testing, and contributed to deployment on Google Play and App Store with staging environments. Implemented Alibaba Cloud ECS-based server provisioning, Docker containerization, and migration from Apache 2 to Nginx; optimized infrastructure for cost and scale. Monitored Jira boards (Sprint, Defect, PRs) to align QA results with Product Manager requirements. Improved database performance via indexing on high-volume relational datasets. Created documentation for platform no

Full Stack Developer at Hi-Fella

September 30, 2022 - October 17, 2025

Designed and implemented RESTful APIs using the Laravel framework to enable seamless communication between front-end and back-end systems. Deployed and maintained projects on Ubuntu servers, ensured efficient, secure, and scalable server configurations. Translated UI/UX designs into functional and responsive web applications, maintaining design accuracy and optimizing user experience with Laravel. Provided continuous support and updates for existing websites and mobile applications to ensure optimal performance and user satisfaction.

Full Stack Developer at Hi-Fella

September 30, 2022 - October 17, 2025

Designed and implemented RESTful APIs using Laravel; translated UI/UX designs into functional, responsive web applications with Laravel. Deployed and maintained projects on Ubuntu servers; provided ongoing support and updates for existing websites and mobile apps to ensure optimal performance and user satisfaction. Built three separate web platforms (two user-facing dashboards and one admin panel) with tailored functionality. Resolved security issues (e.g., attacker scripts) by identifying and shutting down malicious processes. Worked in Agile environments, coordinating with stakeholders to align tech execution with business goals. Launched MVPs, iterated quickly, and managed uncertainty to deliver scalable solutions. Improved backend performance by integrating Laravel Octane, and prepared for cloud deployment.