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I’m Kim, a software developer who enjoys building fast, reliable web platforms and product experiences end to end—from backend API design to polished frontend UI. I’ve reduced API response times dramatically by optimizing queries and data handling, and I’ve delivered platform features that support large catalogs and thousands of users. Across my roles, I’ve worked with modern stacks like TypeScript, React/Next.js, Flutter, and Node/NestJS, integrating services such as AWS, Supabase, Stripe, and OpenAI. I particularly like turning complex requirements into maintainable systems—whether scaling ecommerce frontends with reusable component libraries, implementing subscription monetization and access control, or improving AI workflow performance by moving compute-heavy work server-side.…I’m Kim, a software developer who enjoys building fast, reliable web platforms and product experiences end to end—from backend API design to polished frontend UI. I’ve reduced API response times dramatically by optimizing queries and data handling, and I’ve delivered platform features that support large catalogs and thousands of users. Across my roles, I’ve worked with modern stacks like TypeScript, React/Next.js, Flutter, and Node/NestJS, integrating services such as AWS, Supabase, Stripe, and OpenAI. I particularly like turning complex requirements into maintainable systems—whether scaling ecommerce frontends with reusable component libraries, implementing subscription monetization and access control, or improving AI workflow performance by moving compute-heavy work server-side.

Heeyoung Kim

Software Engineer, Full Stack Developer, Web Developer, +2

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I’m Kim, a software developer who enjoys building fast, reliable web platforms and product experiences end to end—from backend API design to polished frontend UI. I’ve reduced API response times dramatically by optimizing queries and data handling, and I’ve delivered platform features that support large catalogs and thousands of users. Across my roles, I’ve worked with modern stacks like TypeScript, React/Next.js, Flutter, and Node/NestJS, integrating services such as AWS, Supabase, Stripe, and OpenAI. I particularly like turning complex requirements into maintainable systems—whether scaling ecommerce frontends with reusable component libraries, implementing subscription monetization and access control, or improving AI workflow performance by moving compute-heavy work server-side.…I’m Kim, a software developer who enjoys building fast, reliable web platforms and product experiences end to end—from backend API design to polished frontend UI. I’ve reduced API response times dramatically by optimizing queries and data handling, and I’ve delivered platform features that support large catalogs and thousands of users. Across my roles, I’ve worked with modern stacks like TypeScript, React/Next.js, Flutter, and Node/NestJS, integrating services such as AWS, Supabase, Stripe, and OpenAI. I particularly like turning complex requirements into maintainable systems—whether scaling ecommerce frontends with reusable component libraries, implementing subscription monetization and access control, or improving AI workflow performance by moving compute-heavy work server-side.

Available to hire

I’m Kim, a software developer who enjoys building fast, reliable web platforms and product experiences end to end—from backend API design to polished frontend UI. I’ve reduced API response times dramatically by optimizing queries and data handling, and I’ve delivered platform features that support large catalogs and thousands of users.

Across my roles, I’ve worked with modern stacks like TypeScript, React/Next.js, Flutter, and Node/NestJS, integrating services such as AWS, Supabase, Stripe, and OpenAI. I particularly like turning complex requirements into maintainable systems—whether scaling ecommerce frontends with reusable component libraries, implementing subscription monetization and access control, or improving AI workflow performance by moving compute-heavy work server-side.

Skills

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Intermediate

Work Experience

Software Developer (Fractional) at Andoe

September 1, 2025 - May 1, 2026

Built and launched an AI-powered brand visibility platform that surfaces actions to drive the most AI-generated exposure for a brand, providing marketing teams with actionable visibility scores. Designed full-stack end-to-end architecture using Next.js, TypeScript, Supabase, and the OpenAI API, orchestrating server-side AI workflows, persistent data storage, and scalable API processing. Implemented subscription-based monetization with Stripe payment flows and integrated subscription state with application-level access control. Improved AI workload performance by about 70%, reducing response times from ~10s to ~3s by migrating compute-intensive visibility calculations from client-side to server-side functions deployed on Vercel.

Software Developer at Code Participle

September 1, 2025 - Present

Reduced API response times by about 80% (from ~7s to ~1.3s) by optimizing backend queries, API processing, and frontend data handling for data-intensive views. Delivered core platform experiences supporting 1,200+ users and a catalog of 16,800+ products, building features such as directory, product library, editorials, endorsements, testimonials, and profile workflows integrated with API services. Built an entitlement-based access control system spanning 25 feature gates and 21 entitlements to enable centralized access management across Free and Paid product tiers. Built and maintained Flutter applications from a shared codebase, including 30+ reusable components based on Figma designs, delivering consistent responsive UX across mobile and web and shipping production-ready features on AWS in close collaboration with design, backend, and product teams.

Software Developer at AG1 (Athletic Greens)

March 1, 2024 - September 1, 2025

Architected and scaled production frontends for customer-facing ecommerce experiences using Next.js, React, and TypeScript, including a shared @ag1/ui library with 94 reusable, SSR-compatible components. Enabled localized, data-driven ecommerce experiences across eight locales by integrating Sanity, Strapi, and Supabase with NestJS and AWS Lambda backend services. Supported controlled feature rollouts and experimentation across 18 feature flags using Statsig, alongside Zustand, TanStack Query, and Zod for state management, data fetching, and validation. Led end-to-end development of an in-house Asset Library for the Offer Builder, owning architecture, implementation, integration, and production delivery to streamline reusable asset management for influencer partners company-wide. Resolved complex SSR, SCSS, and bundling issues across Next.js, Vite, and TSUP to improve build reliability and reduce environment-specific bugs in the shared UI library.

Full-Stack Developer at Blinkmoon Games

May 1, 2023 - September 1, 2023

Built real-time, interactive in-game ecommerce experiences using Unreal Engine (C++) integrated with a WebView-based in-game web UI (JavaScript), delivering end-to-end item shop workflows including item discovery, selection, display, and purchase for a catalog of 50+ in-game items.