j
juansegundososa

Juan Sosa

@juansegundososa

FullStack Developer with 5 years of experience building web and mobile apps

Argentina
English
About me
Hi! I’m Juan, a Full-Stack Developer with 5+ years of experience building web and mobile applications that help businesses grow 🚀 I specialize in creating fast, scalable, and user-friendly applications using modern technologies like React, Next.js, and React Native. I can help you with: ✔ Custom web applications ✔ SaaS platforms ✔ Mobile apps ✔ API integrations ✔ Performance optimization I focus on delivering clean, maintainable code and real business value, not just features. Let’s turn your idea into a powerful digital product.... Read more

Skills

j
juansegundososa
Juan Sosa
Offline • 
Average response time: 22 hours

See my services

Full Stack Web Applications
I will build your custom saas web application with react and nextjs
From$150 / projectMore details
E-Commerce Store Management
I will develop a high performance ecommerce website with react or nextjs
From$100 / projectMore details

Portfolio

Work experience

Freelancer.com

Freelancer.com

Self-employed • 1 yr 11 mos

Senior Full-Stack developer

Jan 2026 - Present • 6 mos

I design and implement REST APIs using NestJS and Node.js, and build user interfaces with Next.js, React, and Angular for production applications. I contributed to the development of Festival Pro, a mobile app built with React Native and Expo for real-time event management. I contribute to architectural decisions, performance optimization, and code reviews, ensuring that the code is maintainable and ready to scale. Company: Capsule Codes

Senior Full-Stack developer

Sep 2025 - Mar 2026 • 6 mos

I developed dynamic and responsive interfaces using Vue, Quasar, and GraphQL for a 6-month web application project. I worked closely with the product team, adapting to changing requirements while maintaining visual consistency and a seamless user experience throughout the project. Company: High Impact

Full-Stack developer

Oct 2024 - Sep 2025 • 11 mos

I developed and maintained web applications using Next.js, React, and TypeScript, following best practices in architecture and design. I participated in database modeling, code reviews, and technical planning as part of an agile team. I contributed to backlog management and technical decision-making to improve the product’s quality and scalability. Projects: - https://arcorencasa.cl/ - https://saphirus.com.ar/ Company: Minimalart