LEWIS PEREZ
Full Stack Developer | API Specialist
Experienced Software Engineer with 8+ years of expertise in enterprise applications across healthcare, banking, and telecommunications sectors. Specialized in Java enterprise development, cloud infrastructure, microservices architecture, and scalable API design. Proven track record of delivering high-performance solutions and leading technical initiatives.
Technical Skills
Frontend
- โกJavaScript
- ๐TypeScript
- โ๏ธReact
- ๐บNext.js
- ๐จHTML/CSS
- ๐จTailwind CSS
Backend
- โJava 8+
- ๐Spring Boot
- ๐ขNode.js
- ๐Python
- ๐REST APIs
- ๐งHibernate
- ๐๏ธMicroservices
Database
- ๐PostgreSQL
- ๐ฌMySQL
- ๏ฟฝ๏ธOracle DB
- ๐ElasticSearch
Cloud & DevOps
- โ๏ธAWS
- ๐ณDocker
- ๐๏ธJenkins
- ๐Git
- โ๏ธKubernetes
- ๐CI/CD
Security & Testing
- ๐OAuth2/JWT
- ๐งชJUnit
- โ TDD
- ๐ก๏ธCyber Security
Project Archive
E-commerce Platform
Delivered a Shopify e-commerce site with payment/shipping logic, theme customisation, and responsive UI using Liquid, HTML, CSS.
Portfolio Website
Dynamic portfolio website built with Next.js, showcasing skills and projects with responsive design and modern UI/UX.
Enterprise API Orchestration
Built modular Java orchestration engine at ING integrating multi-API workflows, improving customer onboarding throughput by 30%.
ElasticSearch Migration Tool
Developed multithreaded Java migration utility at IBM for 16M+ documents, enhancing search performance by 40% with custom validation and logging.
Professional Experience
Freelance Full Stack Developer
Melbourne, VIC
Mar 2025 - Present
- Delivered a Shopify e-commerce site, implementing payment/shipping logic, theme customisation, and responsive UI using Liquid, HTML, CSS. (gintuanatbp.com)
- Integrated secure third-party APIs and configured back-end workflows.
- Engaged directly with the client to gather requirements and deliver training documentation.
- Provide on-going IT support.
Food Service Assistant
Regis Aged Care Pty Ltd.
Mar 2023 โ Present
- Applied compliance-driven processes in aged care operations, mirroring secure engineering discipline.
- Demonstrated precision, collaboration, and adaptability in high-stakes environments.
Java Engineer
ING Business Shared Services, Philippines
Nov 2021 โ Oct 2022
- Engineered and optimised Spring Boot APIs, improving customer onboarding throughput by 30%.
- Designed secure, reusable API layers implementing validation, exception handling, and encryption.
- Collaborated in Agile sprints, led backlog grooming, and mentored junior engineers.
Software Engineer
Amdocs Philippines Inc.
Jan 2019 โ Oct 2021
- Delivered Java-based backend services for high-volume telecom platforms.
- Designed relational data models, optimised large-scale MySQL transactions, and built integration APIs.
- Reduced release cycles via Jenkins-based CI/CD pipelines and automated deployment scripts.
Advanced Programming Specialist
IBM Solutions Delivery Inc.
Mar 2014 โ Dec 2018
- Developed Java ingestion and transformation tools supporting enterprise platforms.
- Built multithreaded migration utility for 16M+ records to ElasticSearch, improving search performance by 40%.
- Provided production support and collaborated with global teams to deliver compliant upgrades.
Educational Background
- EDU_001CERTIFIED
Advanced Diploma of Information Technology (Telecommunications Network Engineering)
Brighton College, Melbourne
- EDU_002CERTIFIED
Diploma in Information Technology (Cyber Security)
Brighton College, Melbourne
- EDU_003CERTIFIED
Bachelor of Science in Electronics Engineering
De La Salle University, Manila, Philippines
Get In Touch
About Me
Based in Caulfield East, VIC 3145. I'm always open to discussing new opportunities and exciting projects.