Hey, I'm Harold Eustaquio — Software Engineer
I design and build scalable backend systems, APIs, and cloud-ready applications. Based in the Philippines, I specialize in full-stack engineering with a focus on performance, clean architecture, and user-first solutions across startups and enterprise-grade platforms.
About Me
I'm Harold Eustaquio, a Software Engineer from the Philippines with a strong focus on backend development, databases, and scalable system design. I work across the full stack—leveraging technologies like NestJS, Nuxt, PostgreSQL, Redis, and AWS—to build clean, efficient, and resilient applications.
I bring a strong systems-thinking mindset to every project, whether it’s designing cloud infrastructure, optimizing data pipelines, or implementing real-time messaging with RabbitMQ. I’m also experienced with MongoDB and MySQL for flexible data modeling and legacy integrations.
Beyond code, I value performance, developer experience, and long-term maintainability. I aim to deliver practical solutions that align user needs with business goals—whether you’re scaling an early-stage MVP or modernizing enterprise systems.
Work Experience
Latest Articles
Some of my recent thoughts
Frequently Asked Questions
Answers to common questions about my process and services.
I provide full-stack software engineering services, from backend architecture to frontend development and cloud infrastructure. I specialize in building scalable systems using NestJS, Nuxt/Vue, PostgreSQL, Redis, RabbitMQ, and AWS. I also have experience in data-intensive systems using MongoDB and MySQL, and emerging technologies like blockchain and neural networks. Whether it's a greenfield project, API integration, or refactoring legacy systems, I bring a practical, solution-oriented mindset.
I follow a pragmatic, agile-driven development process. It starts with understanding the problem and aligning on goals. Then I move to architecture planning, rapid prototyping, iterative development, automated testing, and CI/CD deployment. I use tools like Docker, GitHub Actions, and AWS services to keep things scalable, maintainable, and production-ready.
Definitely. I enjoy partnering with founders to validate ideas quickly and build MVPs that can evolve with real-world feedback. I bring experience balancing technical scalability with startup agility, often advising on architecture choices, stack selection, and early team setup.