Open to U.S. remote contractor work

Khoa Le

Senior Full Stack Engineer

London, United Kingdom

Working with U.S. time-zone overlap

I build scalable full-stack products with React, Next.js, Node.js, Python, AWS/GCP, and AI-assisted workflows. 12+ years across product engineering, backend systems, and cloud infrastructure, focused on shipping practical, reliable software.

$ khoa --status

→ Open to U.S. remote contractor work, freelance projects, and part-time product engineering engagements.

$ khoa --contact

→ khoalt25791@gmail.com

$ khoa --cv

→ KHOA_LT.pdf (Latest CV)

README.md

experience.md

projects.md

skills.md

workflow.md

☰ README.md

# Khoa Le

Senior Full Stack Engineer based in London, United Kingdom.
Open to U.S. remote contractor and freelance opportunities.

## Core Expertise
- Full-Stack Architecture: React, Next.js, TypeScript, Node.js, Python, Ruby on Rails
- Video & Media Engineering: Remotion, ffmpeg, serverless media pipelines
- DevOps & Orchestration: AWS, GCP, Kubernetes, Docker, Nginx, PM2, CI/CD
- AI-Assisted Workflows: Claude Code, Codex, spec-driven development

## Summary of Experience
With 12+ years of experience building full-stack products across front-end, back-end, and cloud infrastructure, I focus on practical systems that require high performance, reliability, and velocity. 

I work comfortably in AI-assisted, spec-driven environments and regularly use Claude Code and Codex to accelerate implementation, improve quality, and ship faster. I’m especially interested in remote product teams that value strong ownership, practical engineering, and fast execution.

Khoa Le

Senior Full Stack Engineer based in London, United Kingdom. Open to U.S. remote contractor and freelance opportunities.

Core Expertise

Full-Stack Architecture: React, Next.js, TypeScript, Node.js, Python, Ruby on Rails
Video & Media Engineering: Remotion, ffmpeg, serverless media pipelines
DevOps & Orchestration: AWS, GCP, Kubernetes, Docker, Nginx, PM2, CI/CD
AI-Assisted Workflows: Claude Code, Codex, spec-driven development

Summary of Experience

With 12+ years of experience building full-stack products across front-end, back-end, and cloud infrastructure, I focus on practical systems that require high performance, reliability, and velocity.

I work comfortably in AI-assisted, spec-driven environments and regularly use Claude Code and Codex to accelerate implementation, improve quality, and ship faster. I’m especially interested in remote product teams that value strong ownership, practical engineering, and fast execution.

☰ experience.md

# Experience & History

## Pencil AI — Senior Full Stack Engineer (10/2019 - Present)
Lead full-stack development of AI-powered content creation platform using Remotion, Next.js, Node.js, and Python, shipping features from concept to production in a spec-driven environment.

**Tech Stack:** Next.js, React, Node.js, Python, AWS, GCP, Kubernetes, Remotion, CopilotKit, Mediabunny

### Key Outcomes
- Refactored asset processing pipeline using Mediabunny and browser-based execution, eliminating server-side dependencies and reducing infrastructure costs while maintaining performance.
- Implemented in-browser video manipulation features including clip stitching and on-the-fly thumbnail generation with Remotion, enabling real-time content editing without server round-trips.
- Applied AI coding frameworks (Claude Code, Cursor, Codex) to daily development workflows, increasing productivity and accelerating feature delivery speed.
- Joined AI team to transform traditional UI components into AG-UI (Agent-Generated UI) components using CopilotKit, enabling AI-driven dynamic interface generation.

## Metro Residences — Full Stack Engineer (08/2018 - 10/2019)
Developed and maintained web applications using React, Node.js, and TypeScript for real estate management platform, implementing database integrations and managing cloud infrastructure.

**Tech Stack:** React, Node.js, TypeScript, MongoDB, PostgreSQL, AWS, GCP, Docker, Kubernetes

### Key Outcomes
- Implemented RESTful APIs and database integrations using MongoDB and PostgreSQL.
- Deployed and managed cloud infrastructure on AWS and GCP using Docker and Kubernetes.
- Collaborated with cross-functional teams to deliver features and improve overall system performance.

## Freelancer.com — Senior Software Engineer (01/2017 - 08/2018)
Led development of a mobile and web platform for on-demand services using React Native and Node.js, optimizing performance for high-traffic environments.

**Tech Stack:** React Native, Node.js, RESTful APIs, Payment Gateways, Geolocation, Performance Optimization

### Key Outcomes
- Led development of mobile and web platforms for on-demand services using React Native and Node.js.
- Built RESTful APIs and integrated third-party services including payment gateways and geolocation.
- Optimized application performance and database queries for high-traffic environments while mentoring junior developers.

## Robert Bosch — Software Engineer (05/2013 - 12/2016)
Developed embedded software and firmware for automotive control systems and implemented IoT solutions.

**Tech Stack:** C/C++, Embedded Systems, IoT, RESTful APIs, Agile, System Integration

### Key Outcomes
- Developed embedded software and firmware for automotive control systems using C/C++.
- Implemented IoT solutions for vehicle diagnostics and remote monitoring systems.
- Designed and maintained RESTful APIs for integration between embedded systems and cloud platforms under Agile cycles.

## FPT Software — Software Engineering Intern (01/2012 - 12/2012)
Supported development of web applications and RESTful APIs, gaining hands-on coding and debugging experience under mentorship.

**Tech Stack:** JavaScript, HTML/CSS, RESTful APIs, Version Control, Agile methodologies

### Key Outcomes
- Supported development of web applications using JavaScript and basic frontend technologies.
- Assisted in building and testing RESTful APIs for internal tools and client projects.
- Gained hands-on exposure to full software development lifecycle under senior engineer mentorship.

Pencil AI

10/2019 - Present

Senior Full Stack Engineer

Lead full-stack development of AI-powered content creation platform using Remotion, Next.js, Node.js, and Python, shipping features from concept to production in a spec-driven environment.

▹ Refactored asset processing pipeline using Mediabunny and browser-based execution, eliminating server-side dependencies and reducing infrastructure costs while maintaining performance.
▹ Implemented in-browser video manipulation features including clip stitching and on-the-fly thumbnail generation with Remotion, enabling real-time content editing without server round-trips.
▹ Applied AI coding frameworks (Claude Code, Cursor, Codex) to daily development workflows, increasing productivity and accelerating feature delivery speed.
▹ Joined AI team to transform traditional UI components into AG-UI (Agent-Generated UI) components using CopilotKit, enabling AI-driven dynamic interface generation.

Next.js React Node.js Python AWS GCP Kubernetes Remotion CopilotKit Mediabunny

Metro Residences

08/2018 - 10/2019

Full Stack Engineer

Developed and maintained web applications using React, Node.js, and TypeScript for real estate management platform, implementing database integrations and managing cloud infrastructure.

▹ Implemented RESTful APIs and database integrations using MongoDB and PostgreSQL.
▹ Deployed and managed cloud infrastructure on AWS and GCP using Docker and Kubernetes.
▹ Collaborated with cross-functional teams to deliver features and improve overall system performance.

React Node.js TypeScript MongoDB PostgreSQL AWS GCP Docker Kubernetes

Freelancer.com

01/2017 - 08/2018

Senior Software Engineer

Led development of a mobile and web platform for on-demand services using React Native and Node.js, optimizing performance for high-traffic environments.

▹ Led development of mobile and web platforms for on-demand services using React Native and Node.js.
▹ Built RESTful APIs and integrated third-party services including payment gateways and geolocation.
▹ Optimized application performance and database queries for high-traffic environments while mentoring junior developers.

React Native Node.js RESTful APIs Payment Gateways Geolocation Performance Optimization

Robert Bosch

05/2013 - 12/2016

Software Engineer

Developed embedded software and firmware for automotive control systems and implemented IoT solutions.

▹ Developed embedded software and firmware for automotive control systems using C/C++.
▹ Implemented IoT solutions for vehicle diagnostics and remote monitoring systems.
▹ Designed and maintained RESTful APIs for integration between embedded systems and cloud platforms under Agile cycles.

C/C++ Embedded Systems IoT RESTful APIs Agile System Integration

FPT Software

01/2012 - 12/2012

Software Engineering Intern

Supported development of web applications and RESTful APIs, gaining hands-on coding and debugging experience under mentorship.

▹ Supported development of web applications using JavaScript and basic frontend technologies.
▹ Assisted in building and testing RESTful APIs for internal tools and client projects.
▹ Gained hands-on exposure to full software development lifecycle under senior engineer mentorship.

JavaScript HTML/CSS RESTful APIs Version Control Agile methodologies

☰ projects.md

# Personal Projects

## khoalt.dev (2026)
My personal developer portfolio. Fuses a pure-monospace, terminal-brutalist aesthetic with clean, responsive design.

**Repository:** https://github.com/KhoaTheBest/khoa-portfolio
**Tech Stack:** Astro, TypeScript, TailwindCSS, SCSS, HTML5, Netlify

### Key Outcomes
- Created custom tabbed browser UI to display bio, skills, and projects in a terminal terminal-style format.
- Configured automated CI/CD pipeline via Netlify connected directly to GitHub, ensuring instant zero-downtime deployments on merge.
- Integrated customized headless browser check diagnostics and proper canonical tags for SEO optimization.

## opcode-clone (2026)
A desktop GUI application and developer toolkit built as a wrapper for the Claude Code CLI assistant.

**Repository:** https://github.com/KhoaTheBest/opcode-clone
**Tech Stack:** Node.js, React, Electron, TailwindCSS, TypeScript, Claude Code

### Key Outcomes
- Designed interactive interface for managing concurrent AI-assisted coding sessions and viewing run logs.
- Implemented secure background execution environment, allowing long-running refactoring or test suites to complete safely with desktop notifications.
- Added project-specific configuration templates to quickly bootstrap standard linting, typing, and testing workflows.

## video-stitching-frontend (2025)
A custom React frontend interface demonstrating browser-based and serverless video rendering workflows.

**Repository:** https://github.com/KhoaTheBest/video-stitching-frontend
**Tech Stack:** React, Next.js, Node.js, Remotion, MediaBunny, TailwindCSS

### Key Outcomes
- Built real-time in-browser video stitching tool, allowing creators to splice video assets and generate instant web previews.
- Optimized media delivery by offloading video processing steps to the client browser, reducing backend server loads and cloud network transit fees.

## vps-bootstrap (2026)
Sleek shell automation suite designed to secure, harden, and bootstrap fresh Ubuntu/Debian VPS servers.

**Repository:** https://github.com/KhoaTheBest/vps-bootstrap
**Tech Stack:** Bash, Linux, Security, Docker, Nginx, UFW

### Key Outcomes
- Created single-command installer to automate core tasks: hardening SSH, configuring UFW/fail2ban, and setting up Docker container runtimes.
- Implemented automated security and dependency update watchdogs to alert on potential vulnerabilities.

khoalt.dev

2026

GitHub Repository →

My personal developer portfolio. Fuses a pure-monospace, terminal-brutalist aesthetic with clean, responsive design.

▹ Created custom tabbed browser UI to display bio, skills, and projects in a terminal terminal-style format.
▹ Configured automated CI/CD pipeline via Netlify connected directly to GitHub, ensuring instant zero-downtime deployments on merge.
▹ Integrated customized headless browser check diagnostics and proper canonical tags for SEO optimization.

Astro TypeScript TailwindCSS SCSS HTML5 Netlify

opcode-clone

2026

GitHub Repository →

A desktop GUI application and developer toolkit built as a wrapper for the Claude Code CLI assistant.

▹ Designed interactive interface for managing concurrent AI-assisted coding sessions and viewing run logs.
▹ Implemented secure background execution environment, allowing long-running refactoring or test suites to complete safely with desktop notifications.
▹ Added project-specific configuration templates to quickly bootstrap standard linting, typing, and testing workflows.

Node.js React Electron TailwindCSS TypeScript Claude Code

video-stitching-frontend

2025

GitHub Repository →

A custom React frontend interface demonstrating browser-based and serverless video rendering workflows.

▹ Built real-time in-browser video stitching tool, allowing creators to splice video assets and generate instant web previews.
▹ Optimized media delivery by offloading video processing steps to the client browser, reducing backend server loads and cloud network transit fees.

React Next.js Node.js Remotion MediaBunny TailwindCSS

vps-bootstrap

2026

GitHub Repository →

Sleek shell automation suite designed to secure, harden, and bootstrap fresh Ubuntu/Debian VPS servers.

▹ Created single-command installer to automate core tasks: hardening SSH, configuring UFW/fail2ban, and setting up Docker container runtimes.
▹ Implemented automated security and dependency update watchdogs to alert on potential vulnerabilities.

Bash Linux Security Docker Nginx UFW

☰ skills.md

# Skills

## Frontend
- React
- Next.js
- TypeScript
- TailwindCSS
- AngularJS
- Astro
- SCSS

## Backend
- Node.js
- Python
- Ruby on Rails
- KoaJS
- PostgreSQL
- MongoDB
- Socket.io
- RPC

## Cloud & Infra
- AWS
- GCP
- Kubernetes
- Docker
- Nginx
- PM2
- Microservices
- CI/CD

## AI-assisted Workflow
- Claude Code
- Codex
- Spec-driven development
- GSD
- Superpowers
- Agent-skills

Frontend

React Next.js TypeScript TailwindCSS AngularJS Astro SCSS

Backend

Node.js Python Ruby on Rails KoaJS PostgreSQL MongoDB Socket.io RPC

Cloud & Infra

AWS GCP Kubernetes Docker Nginx PM2 Microservices CI/CD

AI-assisted Workflow

Claude Code Codex Spec-driven development GSD Superpowers Agent-skills

☰ workflow.md

# Workflow & Principles

I work in a practical, delivery-focused way: clear specs, small milestones, AI-assisted implementation, and high quality maintained through review and iteration.

## 1. Spec first, then ship
I define the spec clearly, break work into milestones, and verify against the goal before calling something done. Less rework, fewer surprises in review.

## 2. AI-assisted, not AI-driven
I use Claude Code and Codex to accelerate implementation and improve quality, but every change goes through review, testing, and judgment. AI helps me ship faster; it does not replace senior engineering.

## 3. Practical and delivery-focused
I optimise for outcomes over ceremony. Whether contributing as an individual contractor or embedded in a remote product team, I keep velocity high without compromising reliability.

## 4. Strong remote collaboration
Comfortable with async-first communication, written context, and U.S. time-zone overlap from London. I keep stakeholders informed without flooding their channels.

I work in a practical, delivery-focused way: clear specs, small milestones, AI-assisted implementation, and high quality maintained through review and iteration.

›Spec first, then ship

I define the spec clearly, break work into milestones, and verify against the goal before calling something done. Less rework, fewer surprises in review.

›AI-assisted, not AI-driven

I use Claude Code and Codex to accelerate implementation and improve quality, but every change goes through review, testing, and judgment. AI helps me ship faster; it does not replace senior engineering.

›Practical and delivery-focused

I optimise for outcomes over ceremony. Whether contributing as an individual contractor or embedded in a remote product team, I keep velocity high without compromising reliability.

›Strong remote collaboration

Comfortable with async-first communication, written context, and U.S. time-zone overlap from London. I keep stakeholders informed without flooding their channels.