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Eng. JJ Nieva
@diodigital_agcy
20 Years of Development, Senior Full Stack and AI Expert
Brazil
English, Portuguese, Spanish
About me
🚀 Senior Full Stack Developer & AI Expert with over 20 years of experience.
As a generalist engineer, I specialize in building complete SaaS products and mobile applications from idea to launch and marketing. Expert in Next.js, Tailwind CSS, Shadcn, Flutter, Supabase, and AI integration (Claude, Grok).
I help entrepreneurs and businesses create, develop, and launch scalable SaaS platforms, Flutter mobile apps (iOS & Android), internal tools, e-commerce solutions, and marketing automation systems — delivering high-quality products with fast time-to-market and strong business focus.
Skills
Eng. JJ Nieva
Offline •
Average response time: 2 hours
See my services
Full Stack Web Applications
I will transform ideas into reality through mvp, saas, and internal app development
Email Management
I will migrate your email to google workspace in 24h dns setup, professional signature
Portfolio
Work experience
Senior Full Stack Developer
Digital Execution Simplified • Self-employed
Jul 2013 - Present • 13 yrs 1 mo
As a Senior Full Stack Developer at DIO Digital Agency, I design, develop, and implement web applications and internal systems. I primarily work with Next.js, Tailwind CSS, Shadcn, and Vercel, applying Spec Driven Development (SDD) and Artificial Intelligence tools to optimize code and accelerate development processes. My responsibilities include creating scalable solutions, maintaining projects, and delivering high-standard digital products. Skills: Next.js, HTML/CSS, React Native, GitHub, React.js
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1-5 out of 6 Reviews
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Excelente implementação. Juan sempre entregando um ótimo trabalho.
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spricigoleo
Repeat Client
Brazil
Novamente o serviço executado por Juan foi de extrema qualidade. Apresentou atenção aos detalhes como sempre. Ótimo trabalho!
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spricigoleo
Repeat Client
Brazil
Juan demonstrou ter grande conhecimento e experiência na área além de falar fluentemente o idioma Português. Comunicação e entrega extremamente profissional tendo documentado todas as etapas do projeto, demonstrando organização e qualidade nas entregas superando as expectativas.
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