Software & Data Engineer

Jasper D. Leoncito

Builder of marathonbunny.com · Go · Next.js · PostgreSQL · Docker

I am well capable of doing jobs and tasks assigned. I am versatile, a quick learner, and a critical thinker. I work hard until I do it correctly. Currently focused on API development, database operations, and full-stack product engineering — from medical billing systems to a live marathon registration platform.

Live project · marathonbunny.com [email protected] Website designs
Featured

Website design showcase

15 distinct landing-page directions, designed and shipped

A companion project to this resume: a Next.js showcase that hosts fifteen full landing-page concepts — from dark security and corporate to dental, hotel, restaurant, and pool-villa themes. Same standalone build, deployed alongside this resume on the same Docker host.

Browse the 15 designs See it live — marathonbunny.com
Skills

Skills & expertise

Programming

Go (Golang) ESQL C# TypeScript JavaScript HTML CSS

Backend / API

RESTful APIs JSON / XML gRPC Google Calendar API PayMongo J&T Express API

Databases

PostgreSQL Supabase Oracle SQL Redis

DevOps / Cloud

Docker Docker Compose Nginx VPS deployment Render Fly.io MinIO

Enterprise

IBM ACE Event-driven / CQRS DDD Unity Engine AR development

Systems & Tools

System troubleshooting Hardware repair Microsoft Office Adobe Suite Graphic design
Experience

Professional experience

Data Engineer

98labs Inc.

Apr 2023 — Nov 2025
  • Developed and maintained data engineering solutions across multiple client projects.
  • Designed and implemented API integrations and data processing systems.
  • Worked with IBM ACE, Oracle SQL, and modern development frameworks.
  • Contributed to banking, leave management, and AR application initiatives.
  • Ensured code quality, system reliability, and performance optimization.

Utility Worker 2 — Permanent

Supreme Court of the Philippines

Jul 2018 — Apr 2023
  • Encoded criminal cases across regions and maintained 201 employee folders.
  • Handled receiving, encoding, and document delivery workflows.
  • Provided computer troubleshooting support to the office.
  • Created table of contents for 500+ employee folders.
  • Trained colleagues on computer shortcuts and efficiency tools.

Freelancer

Upwork & various clients

2021 — Present
  • Photo editing, graphic design, and video editing services.
  • Data encoding using Microsoft Word, Excel, and PowerPoint.
  • Hardware troubleshooting and repair, including mobile, laptop, and desktop.
Projects

Selected projects

Marathon Bunny

Live

Personal project — 2026 — Present

Full-stack marathon registration and event management platform serving runners and event organizers. Online and cash payment flows, live race timing, virtual run leaderboards, and an admin dashboard. Hardened Docker infrastructure with internal-only networking.

Go Next.js TypeScript PostgreSQL Redis MinIO Docker n8n PayMongo J&T Express Nginx
marathonbunny.com

Website Design Showcase

Companion

website-client — Next.js standalone

Fifteen distinct landing-page concepts across security, industry, and lifestyle verticals. Built as a single Next.js standalone app and deployed alongside this resume on the same Docker host.

Next.js React TypeScript Docker
Browse the showcase

SLEC Medical Billing System

98labs

St. Luke’s Extension Clinic — Jul 2025 — Nov 2025

Comprehensive medical billing system with real-time financial analytics and BIR-compliant receipts. Event-driven microservices with CQRS, multi-payment processing, and seamless patient-to-billing workflow integration.

Go Next.js PostgreSQL gRPC Event-driven DDD Docker Redis

AR Avatar Development

98labs

May 2025 — Jul 2025

AR avatar application with expressive eye animations using Unity. Real-time shader-driven animation, cross-device compatibility, and performance optimization across mobile AR platforms.

Unity C# Mobile AR

Leave Balance System

98labs

Aug 2024 — May 2025

Leave management system with real-time Google Calendar integration. Scalable Go backend, RESTful API with role-based access control, and an automated CI/CD pipeline with containerized deployment.

Go PostgreSQL Google Calendar API Docker Render Supabase

Metrobank Core Banking

98labs

Apr 2023 — Aug 2024

Secure banking solutions and transaction processing with regulatory compliance and data security. REST APIs with JSON/XML payloads and ESQL database operations on IBM ACE.

IBM ACE Oracle SQL Developer ESQL JSON / XML ODBC
Education

Education

Bachelor of Science in Information Technology

Adamson University, San Marcelino, Manila

Jun 2014 — Jul 2018

Sorsogon National High School

Secondary education

2011 — 2014

References

Professional references

Arlene M. Aquino

98labs Inc.

Aloixius L. Divinagracia

98labs Inc.