Nathaniel Coronacion

Software Engineer with 3 years of experience building and deploying software applications across e-commerce, education, and finance. Proven track record designing secure RBAC architectures, optimizing performance (96.5% API latency reduction), and owning projects end-to-end — from requirements through deployment. Seeking fulltime software development role to contribute to scalable, maintainable systems within a collaborative team.

Freelance Software Engineer at Self-employed (2023-06 – Present)

• Delivered 14+ commissioned production projects across multiple languages, frameworks, and technology stacks.
• Maintained a 98% client satisfaction rating through milestone-based delivery and direct client ownership.
• Owned projects end-to-end — from requirements analysis and system design through development, testing, and deployment — translating ambiguous business requirements into scalable solutions.

Backend Developer at Lumnaire (2026-05 – 2026-07)

• Contributed to backend development of a property management SaaS using Spring Boot, implementing structured Model-Repository-Service-Controller-DTO layers with clear separation of concerns.
• Collaborated on the PostgreSQL database schemas supporting core property management workflows and data relationships.
• Developed and validated RESTful API endpoints using Postman, collaborating with frontend developers to verify contracts before integration.

Backend Engineer Intern at The Thomas Aquinas Institute of Learning (2026-02 – 2026-04)

• Designed and implemented RBAC, RESTful APIs, and CRUD workflows for dynamic content management and administrative operations.
• Engineered a custom file-based cache-aside mechanism for read-heavy endpoints, reducing average response time from 19.5ms to 0.68ms (96.5% improvement), validated through custom PDO benchmarking.
• Identified and resolved N+1 query patterns using JOIN-based optimization, reducing database queries from 19 to 1 (94.7% reduction) and improving execution time by ~20%.
• Designed a normalized MySQL schema with strategic indexing, and implemented server-side pagination and polling-based notifications for large-dataset performance and near real-time updates.
• Structured the application using MVC within a monolithic architecture, documenting the SDLC via Waterfall across requirements, design, development, testing, deployment, and maintenance.

Bachelor of Science in Computer Science – STI College Bacoor (2022-09 – 2026-06)