EXPLORE


4.5
4.5
87%
$20 USD / Hour
・

Colombia (9:20 AM)
・
Joined on November 14, 2023
・
1 Recommendation
$20 USD / Hour
・
Highly skilled Senior Developer with extensive experience in both web and mobile application development. Expert in JavaScript, TypeScript, React, React Native, Node.js, Flutter, and REST/GraphQL APIs, with a strong understanding of UI/UX principles, responsive design, and scalable architecture. Proven track record of delivering high-quality, performant, and maintainable applications across platforms, from responsive websites to cross-platform mobile apps. Experienced in working with cloud services, CI/CD pipelines, and agile methodologies, ensuring smooth deployment and continuous improvement. 🚀 Key Skills: 💦 Web Development: React, Angular, Vue.js, Node.js, Express, HTML5, CSS3, SASS/SCSS, Bootstrap, Tailwind CSS, Next.js, Nuxt.js 💦 Mobile Development: React Native, Flutter, Swift, Kotlin, Ionic, Xamarin 💦 Backend & APIs: REST, GraphQL, Firebase, MongoDB, MySQL, PostgreSQL, AWS Lambda, Serverless Architecture 💦 DevOps & Tools: Git/GitHub/GitLab, Docker, Kubernetes, CI/CD pipelines, Jenkins, AWS, Azure, Firebase Hosting 💦 Testing & QA: Jest, Mocha, Cypress, Detox, Unit & Integration Testing, End-to-End Testing 💦 Performance & Optimization: Code Splitting, Lazy Loading, Progressive Web Apps (PWA), App Store Optimization, SEO Basics 💦 Design & User Experience: Responsive Design, UI/UX Best Practices, Figma, Adobe XD, Material Design, Storybook 💦 Microsoft Excel: Advanced Excel, Data Analysis, Pivot Tables, Excel Dashboards, Formulas & Functions, Data Cleaning, Reporting & Automation, Spreadsheet Management, Google Sheets, CSV Data Handling
Todo ha ido muy bien, buena comunicación y buen trabajo.
Angel G.
@agmila
•

Montmeló, Spain
•
Share

Oscar delivered exceptional work. This was my second project with him, and once again he exceeded expectations. After struggling to implement this logic in Google Forms, I thought what I wanted wasn’t possible—but he brought everything I envisioned to life. Complex logic, smooth flow, and excellent usability. The final product feels like a polished clinical tool. Highly skilled and reliable! I will absolutely work with him again!
Katrina H.
@ThriveLine
•

Parsonsfield, United States
•
Share
He was great, did everything as he explained !
Ivan C.
@ivancakaric
•

Zagreb, Croatia
•
Share

Oscar was great to work with and did an excellent job building a detailed intake form with complex logic. He was responsive, thoughtful, and implemented everything carefully. He handled revisions well and was easy to communicate with throughout. I’m very happy with his work and would definitely hire him again.
Katrina H.
@ThriveLine
•

Parsonsfield, United States
•
Share

proyecto entregado a tiempo, todo acorde a la descripción del proyecto, respetando tiempo y disponible en todo momento! totalmente recomendable
Óscar M.
@antonio900
•

Madrid, Spain
•
Share
Verifications
On time
90%
On budget
90%
Accept rate
91%
Repeat hire rate
20%