Full-Stack Developer | React & Next.js | AI/ML Integration | 20K+ Students Taught
Jaime Villegas
I bridge the gap between engineering precision, AI/ML innovation, and modern web development to create intelligent, high-performance digital products. From training AI models to building scalable applications, I deliver solutions that are robust, maintainable, and future-ready.
About me
My career began in mechatronic engineering, where I learned the discipline of building systems that simply work—robustly and predictably. That analytical foundation is my starting point.
As a full-stack developer, I discovered my passion for building digital products people love to use. I understood that behind every interface there's a person, and that empathy for the end user is as crucial as clean code.
Now, as an AI/ML specialist, I'm at the forefront of training next-generation AI models, having evaluated 168,000+ lines of AI-generated code and completed 560+ training tasks with a 90% approval rating.
This triad—engineering rigor, user-centered development, and AI expertise—is my unique method. I deliver solutions that are technically sound, intuitive to use, and powered by cutting-edge technology.
Want to see this approach in action?
Portfolio
How engineering and software development come together to create robust solutions.
Software Solutions
This is where ideas become code. I build functional and scalable digital products. In this section, you'll find full-stack web applications built with technologies like React and Tailwind CSS, crafted to be visually appealing while offering robust functionality that solves real-world problems.
Engineering & Hardware Design
The foundation of my logical thinking. Here I showcase my work in mechanical design (CAD), electronics, and automation, where precision is key to solving industrial challenges. This engineering mindset is what I apply today to build robust and well-structured software.
Work Experience
A journey through my most notable professional roles and achievements
ML Training Specialist - Code Generation
Training next-generation AI models through expert code evaluation and RLHF (Reinforcement Learning from Human Feedback) techniques, ensuring high-quality outputs for code generation systems.
- Code Evaluation: Reviewed and assessed 168,000+ lines of AI-generated code across Python, JavaScript, TypeScript, React, and C, ensuring accuracy and best practices.
- High Performance: Achieved 90% task approval rating across 560+ training tasks, demonstrating consistent quality and attention to detail.
- RLHF Expertise: Applied reinforcement learning from human feedback techniques to improve AI model outputs and code generation quality.
Freelance Full-Stack Developer
Managing full-cycle projects for international clients, delivering 50+ web applications for 30+ clients with a 60% client retention rate.
- Full-Stack Development: Built and deployed complete web applications using React, Next.js, Node.js, and SQL/NoSQL databases, delivering robust and scalable products.
- IoT Solutions: Developed industrial IoT dashboard that achieved 40% reduction in inspection time with 95%+ microcontroller uptime.
- Creative Projects: Built audio visualizer achieving 60fps performance with 10 unique visualizations using Three.js and React Three Fiber.
Frontend Software Engineer
Led the modernization of a legacy software application, migrating 25+ screens to a scalable, high-performance React solution.
- Performance Optimization: Achieved 50% reduction in page load time (4.2s to 2.1s) and 45% improvement in Core Web Vitals.
- Component Library: Built reusable component system now adopted across 3 products, accelerating development by 30%.
- Team Impact: Improved sprint completion rate from 60% to 85% and reduced bug density by 35%.
Online Course Instructor
Creating comprehensive courses on engineering software and programming, reaching a global audience of aspiring developers and engineers.
- Global Reach: Taught 20,000+ students with 485,000+ hours of learning delivered.
- Quality Content: Maintained 4.5+ average rating across courses with 1,000+ reviews.
- Course Portfolio: Specialized in SOLIDWORKS, MATLAB, and programming fundamentals courses for engineering students.
Mechanical CAD Engineer & Project Engineer
Designed custom engineering solutions to optimize industrial processes, from concept to implementation.
- CAD Expertise: SOLIDWORKS Certified Expert (CSWE) with additional certifications in Simulation Professional.
- Complex Systems: Designed mechanical systems (piping, conveyors, industrial equipment) using advanced 3D modeling and FEA simulation.
- Foundation for Software: This experience built my problem-solving approach and structured thinking now applied to software architecture.
Skills
A unique combination of AI/ML expertise, full-stack development, and engineering precision
AI/ML & Data
LLM Training, RLHF techniques, and Prompt Engineering. Experience evaluating 168K+ lines of AI-generated code and training next-generation models.
Frontend Development
Building high-performance UIs with React, Next.js, TypeScript, and Tailwind CSS. State management with Zustand.
Backend Development
Creating robust APIs with Node.js, Express, and Supabase. Database design with PostgreSQL and MongoDB.
3D & Graphics
Creating immersive experiences with Three.js and React Three Fiber. Audio visualizers, 3D web applications, and interactive graphics.
Version Control
Expert in Git and GitHub workflows, CI/CD pipelines, and collaborative development. NPM/Yarn package management.
Testing & Quality
Unit and integration testing to ensure software reliability. Focus on clean, maintainable, and scalable code architecture.
CAD & Engineering
SOLIDWORKS Expert (CSWE) certified. 3D modeling, FEA simulation, and mechanical systems design for industrial applications.
IoT & Embedded
Programming Arduino, ESP32, and microcontrollers with 95%+ uptime. IoT dashboards and industrial automation solutions.
Languages
JavaScript/TypeScript, Python, C, SQL. Frameworks: React, Next.js, Node.js, Express, Astro.
Certifications
Professional credentials validating expertise in AI/ML, software development, and engineering
AI & Machine Learning
Introduction to Machine Learning
Kaggle
Neural Networks and Deep Learning
Coursera - DeepLearning.AI
Improving Deep Neural Networks
Coursera - DeepLearning.AI
Software Development
Microverse Software Development Program
Microverse
React: State Management
LinkedIn Learning
React.js Code Challenges
LinkedIn Learning
Engineering & CAD
SOLIDWORKS Design Expert (CSWE)
Dassault Systemes
SOLIDWORKS Simulation Professional
Dassault Systemes
Tech Support Advanced Specialist
Dassault Systemes
Education
Academic foundation in engineering and technology
Mechatronic Engineering
Bachelor's Degree
Universidad de Caldas
Electronics Technology
Associate Degree
Universidad de Caldas
Mechanical Systems Design
Associate Degree
SENA
What my clients say
Results and collaboration that build trust
Let's build something incredible, together.
My passion is to transform ideas into high-performance digital products. If you are looking for a developer with the precision of an engineer, let's talk.
Let's talk