About Me

Hello, I’m Ed.

I’m a Senior Backend & Cloud Engineer specializing in building scalable, production-grade systems and designing reliable system architectures.

With nearly two decades of experience, I’ve worked across fintech, payment gateways, cybersecurity, billing, tolling, and e-commerce—developing systems where performance, reliability, and security are critical.

My core expertise is in Java (Spring Boot) and AWS, with a strong focus on microservices, distributed systems, and event-driven architectures.

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What I do

I design and build backend systems that are meant to last—systems that scale, handle real-world complexity, and remain maintainable over time.

• Designing scalable backend architectures
• Building microservices and distributed systems
• Developing cloud-native applications on AWS
• Implementing event-driven systems using Kafka
• Integrating secure authentication and identity solutions (OAuth, Keycloak)

I enjoy working on problems where technical decisions have long-term impact—especially around system design, scalability, and performance.

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About this blog

This blog is a collection of lessons, patterns, and practical insights from working on real production systems.

You won’t find basic tutorials here. Instead, I focus on the challenges that come after systems start to grow—when complexity increases, scale becomes a concern, and design decisions matter more.

• Backend engineering with Spring Boot and Quarkus
• System design and architecture patterns
• AWS and cloud-native development
• Event-driven systems and Kafka
• Security and identity management

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How I approach engineering

I believe good systems are not just functional—they are understandable, maintainable, and resilient.

My approach is grounded in:

• Clarity over complexity
• Practical solutions over theoretical perfection
• Designing for scale from the beginning
• Balancing business needs with technical quality

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Let’s connect

If you’re building a system, scaling a platform, or tackling complex backend challenges, I’m always open to a conversation.

📩 Email: eplegaspi2@alum.up.edu.ph
🌐 Website: https://czetsuya.github.io

Let’s build something meaningful.