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Ace De Castro

Software Engineer / Philippines

Thoughtful engineering.Reliable software.

I build full-stack applications with a focus on performance, clarity, and reliability.

01 / Selected work

A few things I've helped build.

  1. 01

    Audit log performance

    From timeouts to sub-300ms queries across 190M+ records.

    Performance · Backend

  2. 02

    Invoice allocation API

    Secure, concurrency-safe allocation for a multi-tenant platform.

    Kotlin · Spring Boot

02 / Experience

  • Paynamics Technologies Inc.

    Software Engineer

    2025 — Present

  • GSS Lab Inc.

    Software Engineer

    2023 — 2024

  • Samsung R&D Institute Philippines

    Full Stack Engineer

    2022 — 2023

  • Cauld & Clark Information Technology Solutions

    Software Engineer

    2021

03 / About

I'm Ace, a software engineer who enjoys turning complex requirements into dependable products.

  • Node.js
  • TypeScript
  • React
  • Kotlin
  • PostgreSQL