Full Stack & Mobile Developer
Hi, I'm Gregory
I build high-performance web and mobile applications, supercharging my workflow with AI tools to ship faster and with higher quality.
05+Years
experience
About Me
My introduction
I'm a Full Stack developer with over 5 years of experience building web and mobile applications end to end. I'm comfortable across both frontend and backend, and I also build cross-platform mobile apps. I've integrated Artificial Intelligence tools into my workflow, letting me develop faster, automate repetitive tasks and deliver higher-quality solutions. I stand out for my responsibility, punctuality, problem-solving efficiency and good practices, adapting easily to different projects and environments.
- 05+
- Years experience
- 10+
- Completed projects
- 03+
- Companies worked
Skills
My technical levelFrontend
Html
Css
JavaScript
TypeScript
React
Next.js
Astro
Mobile
React Native
Expo
UI / Styling
Tailwind
Chakra UI
Sass
Backend / API
Node
Express
NestJS
Golang
Python
Php
Databases
MySql
PostgreSQL
MongoDB
Testing
Cypress
Vitest
Infrastructure
Docker
Firebase
Supabase
Vercel
Railway
Git
GitHub Actions
Bash
AI Tools
Claude Code
OpenCode
Qualification
My personal journeyFrontend Developer (junior)
Kunaifost2021 - 2022FullStack Developer (semi-senior)
Jam Tech2022 - 2025Frontend Developer (senior)
iNuba2026 - 2026
Services
What I offerBackend Developer
Mobile Developer
Frontend Developer
I build modern, fast, and responsive web interfaces that reflect your brand's identity. I focus on user experience so your visitors find what they need intuitively and enjoy browsing your site.
- Responsive interfaces that adapt to any device or screen size.
- Animations and micro-interactions that elevate the experience.
- Optimized performance: fast load times and technical SEO from day one.
- Web accessibility (WCAG) to reach a broader audience.
- Reusable component systems that scale with your project.
- Seamless integration with any API, CMS, or existing backend.
Backend Developer
I design and build the logic layer that powers your application: robust APIs, well-structured databases, and architectures that grow with your business without sacrificing performance or security.
- High-performance, well-documented REST and GraphQL APIs.
- Relational and NoSQL database modeling and optimization.
- Secure authentication with JWT, OAuth2, and role management.
- Third-party integrations: payments, notifications, AI services.
- Scalable architecture built to grow alongside your business.
- Monitoring, logging, and error management in production.
Mobile Developer
I develop cross-platform mobile apps with React Native that look and feel native on both iOS and Android from a single codebase. I handle everything: design, logic, and store deployment.
- Single codebase for both iOS and Android with React Native.
- UI and interactions with a 100% native feel.
- Offline-first architecture with smart data synchronization.
- Push notifications, camera, GPS, and more native integrations.
- App Store and Google Play deployment with Expo EAS.
- Over-the-air updates without going through store review.
FAQ
Quick answers about my services, stack and processWhat services do you offer as a developer?
I offer three core services: Frontend Development (modern, fast, accessible web interfaces built with React, Next.js, Astro, and Tailwind CSS), Backend Development (REST and GraphQL APIs with Node.js, NestJS, and Go, plus database modeling and secure authentication), and Mobile Development (cross-platform iOS and Android apps with React Native and Expo, including App Store / Google Play deployment and OTA updates).
What is your main technology stack?
My main stack covers React, Next.js, Astro and TypeScript on the frontend; Node.js, NestJS, Express and Go on the backend; PostgreSQL, MongoDB and Supabase for data; React Native and Expo for mobile; plus Docker, GitHub Actions, Vercel and Railway for cloud and DevOps. I also integrate AI tools like Claude Code and the OpenAI API into the development workflow to ship faster and with higher quality.
Do you develop native or cross-platform mobile apps?
I build cross-platform mobile applications with React Native and Expo, which means a single codebase ships to both iOS and Android with a near-native feel. When a project requires it, I also write native modules in Kotlin for Android. I handle the full lifecycle: UI, business logic, push notifications, offline-first sync, store deployment, and over-the-air updates with Expo EAS.
How does your development process work?
I start with a short discovery call to align scope, success metrics and constraints. Then I move to a technical design, break the work into milestones and ship in short iterations with weekly demos. Communication happens in your preferred channel (Slack, email or calls), and every milestone ends with code you can review, test and deploy.
How do you use AI in your workflow?
I integrate AI assistants like Claude Code and OpenCode directly into the development loop: generating boilerplate, writing and refactoring tests, accelerating documentation, and reviewing code for accessibility and performance issues. I also build AI features into products when it makes sense — for example, integrating the OpenAI API for smart assistants, automated content or biometric analysis.
How do you structure your rates and availability?
I work on a fixed-price or hourly basis depending on the project. Short scopes and audits are usually fixed-price; ongoing product work is typically hourly or monthly. I am currently open to freelance and contract work and respond to every inquiry within 24 hours — write to gregoryoviedo.dev@gmail.com or send a message through the contact form.
Portfolio
Most recent workTechnologies
