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I will be your full stack developer for react, nextjs, nodejs and nestjs
Kai k.
Level 1
1 pedido en espera
5.0
5.0
Acerca de este Servicio
9+ Years | Top 1% Fiverr | 210+ Websites Enterprise & YC Clients | 100% Satisfaction | Certified Expert
Need someone whos actually shipped SaaS products not just learned the stack?
Most projects dont fail because of bad ideas. They fail because the system isnt designed properly from the start.
I'm Kai, a full-stack developer with 9+ years of building real SaaS products and business systems not demos, not half-finished apps. I work on dashboards, admin panels, APIs, and full SaaS platforms that need structure, clarity, and long-term stability.
Most clients come to me after something went wrong. I help fix that by keeping things simple, clean, and well-planned.
What I work on
- Custom web applications
- SaaS platforms & internal tools
- Backend APIs & integrations
- Authentication, roles & permissions
- Database design & data structure
Tools I use
Frontend Development
- React.js, Next.js, Vue.js, TypeScript
- Tailwind CSS, Bootstrap, MUI, Ant Design
- GSAP, Three.js, WebGL
Backend Development
- Node.js, Express.js, Nest.js
- GraphQL, REST APIs, WebSockets
- JWT, OAuth
Message me before ordering.
I'll tell you whats worth building, what to avoid, and how to do it right the first time.
Respeta los derechos de terceros
Recuerda que incluir temas, plantillas o cualquier otro elemento que viole los derechos de terceros o las leyes aplicables en los trabajos entregados va en contra de las políticas de Fiverr. Puedes ver más información en Guía para la creación digital responsable.
Conoce a Kai k.
Kai k.
Senior Software Engineer
Level 1
- DeReino Unido
- Miembro desdesep 2025
- Responde aprox. en:6 horas
- Última entrega7 meses
Idiomas
Español, Inglés, Alemán, Francés, Árabe
Senior Full Stack Developer | React | Node.Js | Supabase | AI SAAS | AI agents | AI Chatbots
Hi! I’m a Sr. Full Stack Developer with 9+ years of experience delivering scalable, MVPs and enterprise-level web applications for clients globally.
What I Offer
✅ Custom Web Applications (React, Next.js, Node.js)
✅ Enterprise SaaS Development (multi-tenant, scalable systems)
✅ API Development & Integrations (REST, Webhooks, CRMs)
✅ Admin Dashboards & CMS Solutions
✅ Industry Solutions: Real Estate, Education, Retail & eCommerce, Logistics, Energy, Aviation, Healthcare
Let's Start - Order Now
Mi porfolio
FAQ
Why should I message you before ordering?
A short discussion upfront helps avoid bad decisions and ensures we build the right thing the right way from the start.
What type of projects do you work on?
I work on real production projects SaaS platforms, dashboards, admin panels, APIs, and internal business systems. Not demos, tutorials, or half-finished apps.
Do you build full SaaS products or only parts?
Both. I can build a full SaaS system from scratch or work on specific parts like backend APIs, dashboards, authentication, or database design.
Can you fix or continue an existing project?
Yes. Many clients come to me with slow, messy, or unfinished codebases. I can refactor, stabilize, and extend existing systems without breaking them.
How do you approach a new project?
I start by understanding how the system should work, how it will grow, and where problems could appear later. Then I design the structure before writing code.
Which technologies do you use?
React, Next.js, Node.js, Express, NestJS, MongoDB, PostgreSQL, MySQL, plus standard web technologies like HTML, CSS, and JavaScript.
Do you care about performance and scalability?
Yes. Performance, structure, and scalability are part of the build, not afterthoughts.
Will you communicate during the project?
Absolutely. You’ll always know what’s happening, what’s next, and why. No guessing, no disappearing.
Reseñas
9 comentarios sobre este Servicio
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Desglose de calificaciones
- Nivel de comunicación del Freelancer
- Calidad de la entrega
- Valor de la entrega
Ordenar por
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Very solid developer. Took ownership and handled everything properly. 10/10 Recommended
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Delivered exactly what was needed. Easy to work with.
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Reseñas
9 comentarios sobre este Servicio
| (9) | ||
| (0) | ||
| (0) | ||
| (0) | ||
| (0) |
Desglose de calificaciones
- Nivel de comunicación del Freelancer
- Calidad de la entrega
- Valor de la entrega
Ordenar por
Más relevante
T tommy_johnn2
Reino Unido
Very solid developer. Took ownership and handled everything properly. 10/10 Recommended
USD 50
$
2 días
Tiempo
Útil?T thomson_210
Estados Unidos
Delivered exactly what was needed. Easy to work with.
USD 50
$
4 días
Tiempo
Útil?S sammy_243
Estados Unidos
Handled deployment issues smoothly, especially environment variable setup. Everything is working now. Easy to work with and very responsive.
USD 50
$
3 días
Tiempo
Útil?L leborn_
Estados Unidos
Simple, effective, and professional.
USD 50
$
2 días
Tiempo
Útil?B bet231
Estados Unidos
Quick turnaround and solid front-end fix.
USD 50
$
3 días
Tiempo
Útil?
