Erik Estrada
Engineer
Available for work
Erik here! 👋 Software Engineer with 4+ years working on designing and maintaining secure APIs and microservices using Spring, also I have solid hands-on modern frontend technologies like React.js and Angular.
I do love working with cloud platforms (AWS, GCP) and configuring VPS.
About Me
Erik Alejandro Estrada Sauza
I'm a Mexican 🇲🇽 guy now living in Tokyo, Japan 🇯🇵
Full Stack Developer with 4+ years of experience developing several software, specializing in enterprise systems, APIs, and cloud infrastructure.
What I Do
- • Skilled in contribute teams & optimizing system performance
- • Building cross-platform applications using modern frameworks
- • Enterprise systems development and cloud infrastructure
- • API development and system integration
Lest's Connect!
Work Experience
Unable to load AI
Full Stack Developer
Freelance
Sep 2024 – Present
Key Achievements:
- •Developed enterprise Java applications using Spring Boot and responsive web pages with HTML, CSS, JavaScript, Angular, and React applying clean design patterns.
- •Configured Kafka Connect source connector to capture real-time inventory database updates and publish to Kafka topics, enabling synchronized inventory management across 3 microservices.
- •Containerized applications with Docker and orchestrated using Kubernetes for scalability and reliability.
- •Migrated applications to Google Cloud Platform (GCP), reducing infrastructure complexity.
Tech Stack:
Full Stack Developer
Laboratorios Jayor Mexico
Mar 2023 – Sep 2024
Mexico
Key Achievements:
- •Led a team of 5 developers in modernizing legacy Java applications using design patterns (Repository, Dependency Injection).
- •Developed cross-platform mobile applications for Android and iOS using Angular, HTML, CSS, TypeScript, and Ionic, enabling remote report access via cloud and managing App Store deployments.
- •Implemented CI/CD pipelines with Jenkins, reducing deployment time by 50%.
- •Deployed Docker containers and managed databases supporting 100+ concurrent users.
- •Developed backend microservices for logistics using Spring Boot, JPA, and Security with JUnit testing.
- •Optimized PostgreSQL databases using efficient SQL queries and Flyway for version-controlled migrations.
- •Resolved critical AWS S3 file management issues by implementing IAM security controls in production.
- •Contributed to React component development and optimized frontend performance, reducing page load times by 25%.
Tech Stack:
Software Developer
DECSEF Sistemas
Jan 2022 – Mar 2023
Key Achievements:
- •Maintained and enhanced payment integration systems supporting Stripe and PayPal APIs for mobile applications.
- •Containerized legacy Spring Boot applications using Docker, improving deployment and reducing setup time.
- •Built interactive map visualization features using Angular and Luciad GeoSpatial library.
- •Developed payment integration system for Android application using Java, implementing Stripe and PayPal APIs for subscriptions.
- •Contributed to Spring Boot monolithic applications for database management, implementing CRUD operations.
Tech Stack:
My Projects
Secction in Progress!
Blog
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Mar 14, 2026
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"Simplicity is the soul of efficiency."
— Austin Freeman
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Tech Stack
Languages
Frontend
Backend
Databases
DevOps & Tools
Cloud Platforms
Education
Computer Systems Engineering
Instituto Tecnológico de Pachuca
Graduated Jun-2022
GPA: 3.6 (Score: 89.58 / 100)
Languages
English
Advanced
Spanish
Native
Connect
Book a Free Call
Location
Tokyo, Japan 🇯🇵
Follow Me
Ready to Start
Whether you're interested in discussing a project, exploring technical opportunities, or just want to have a chat, I'd love to hear from you.
What I'm Looking For?
• Full-stack development opportunities
• Remote anywhere or Tokyo-based positions
• Interesting freelance projects
• Tech collaboration and mentoring