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You will get a web application designed and developed with Next.JS
Project details
React Native | React Native Mobile | React Native Expo | React Native Webrtc | React Native iOS | React Native Developer | React Native Expert | React Native App | React Native Mobile App | React Native Firebase - Mobile App Development - Mobile app development.
Need a fast, modern, and reliable web application? This project delivers high-performance solutions using React and Next.js - built for speed, SEO, and scalability. Whether you're launching a startup, upgrading an existing site, or bringing your app idea to life, you'll get a polished, responsive product built with clean, maintainable code.
• Lightning-fast load times with server-side rendering
• Mobile-first design and smooth user experience
• Scalable architecture tailored to your business needs
• API integration, state management, and best practices built-in
• Clear communication and support every step of the way
Each project is crafted with performance, flexibility, and user experience at the core - ensuring your app looks great and functions flawlessly across devices.
Let's turn your vision into a professional web application that drives real results.
Message me to get started today!
Need a fast, modern, and reliable web application? This project delivers high-performance solutions using React and Next.js - built for speed, SEO, and scalability. Whether you're launching a startup, upgrading an existing site, or bringing your app idea to life, you'll get a polished, responsive product built with clean, maintainable code.
• Lightning-fast load times with server-side rendering
• Mobile-first design and smooth user experience
• Scalable architecture tailored to your business needs
• API integration, state management, and best practices built-in
• Clear communication and support every step of the way
Each project is crafted with performance, flexibility, and user experience at the core - ensuring your app looks great and functions flawlessly across devices.
Let's turn your vision into a professional web application that drives real results.
Message me to get started today!
Programming Languages
TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Performance OptimizationWhat's included
| Service Tiers |
Starter
$180
|
Standard
$500
|
Advanced
$2,000
|
|---|---|---|---|
| Delivery Time | 4 days | 7 days | 10 days |
Number of Revisions | 3 | Unlimited | Unlimited |
Number of Pages | 1 | 2 | 10 |
Design Customization | |||
Content Upload | - | ||
Responsive Design | - | ||
Source Code | - |
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GH
GLODUSK H.
Nov 12, 2025
Full-Stack React Native Developer (Finish React-Native App) [NO AGENCIES]
asa
DV
Director V.
Jun 16, 2025
Multimodal (share media in chat UI) + STT to TTS Chatbot Front-end dev only NextJS/ReactJS
I run a technology company and needed to offload some tasks to get through delivery timelines. Sebastian's experience and skills turned out to be so good that we are now planning for more work together. He is diligent, highly skilled, and understands aspects of product development which most do not.
HR
Humberto R.
May 7, 2025
I need debugging and QA
Thank you very much to this young man for completing the work I needed (debugging that needed to be resolved quickly). Professional and straight to the point. Thank you very much!
AH
Alejandro H.
Apr 28, 2025
Backend developer create a clean + modular API for user registration, login, logout, profile access
He was amazing and delivered my project before expected time, honestly pretty professional and he is confident, it's obvious he has been doing this for a very long time. He understands project management quite well and was really good at providing ideas. I have no concerns, really hats off to him. Definitely recommended.
About Sebastian
Full-Stack Development | iOS & Android App Developer
100%
Job Success
Puerto Colombia, Colombia - 4:29 am local time
With over 10 years of experience, I specialize in building fast, scalable, and user-focused applications — from MVPs for startups to production-ready apps used by thousands.
I’ve led the development of on-demand and product-driven platforms with real-time location tracking, seamless payment integrations (Stripe), and modern cross-platform architecture using React Native, Next.js, and NestJS. My focus is on delivering polished, high-performance experiences across mobile and web.
🛠 Core Expertise:
Cross-Platform App Development – Building performant mobile apps using React Native with shared codebases for iOS and Android
Web Applications with Next.js – SEO-friendly, fast-loading admin panels, dashboards, and landing pages
Backend APIs with Node.js & NestJS – Secure, scalable REST and GraphQL APIs with clean architecture
Real-Time Location & Maps – Integration with Google Maps API, live tracking, route handling, and geo-fencing
Payment Integrations – Seamless checkout experiences using Stripe, including subscriptions and multi-currency support
Social & Communication Features – In-app chat, activity feeds, push notifications, and user interactions
Authentication & OAuth – Secure sign-in flows using Google, Apple, and custom auth systems
Third-Party API Integrations – Deep experience working with external services like Google Calendar, Outlook, WhatsApp, and more
💼 Industries I've Worked In:
On-Demand Services – Apps for booking, logistics, delivery, and real-time location tracking
E-commerce & Retail – Custom storefronts, checkout flows, and product catalog apps
Fintech & Payments – Wallets, financial dashboards, Stripe integrations, and secure flows
Health & Wellness – Appointment scheduling, patient engagement, and journaling tools
Social & Community Platforms – Chat, notifications, user walls, and community management
Real Estate & Rentals – Property listings, lead capture, and geo-based search
Event & Booking Platforms – Interactive event guides, ticketing, calendar syncing
⚙️ Tech Skills Snapshot:
React Native: 9/10 – Primary cross-platform framework used in production apps
Next.js / React: 9/10 – For modern, SEO-friendly web applications and admin panels
Node.js / NestJS: 9/10 – Scalable backend APIs with strong architectural patterns
PostgreSQL / MongoDB: 8/10 – Flexible data modeling and performance at scale
Stripe / OAuth / Google APIs: 8/10 – Smooth integrations for payments, auth, and services
Android / iOS (Native): 9/10 – Strong foundation, but currently focused on cross-platform solutions
I bring not just technical expertise, but a product-focused mindset — ensuring that your app isn’t just well-coded, but also aligned with your business goals.
💬Let’s talk about your project.
Whether you’re building from scratch or need help scaling, I’m here to turn your vision into a reliable, user-friendly product — fast.
I prioritize clear communication, predictable delivery, and long-term support.
Connect with me and bring your idea to life.
Steps for completing your project
After purchasing the project, send requirements so Sebastian can start the project.
Delivery time starts when Sebastian receives requirements from you.
Sebastian works on your project following the steps below.
Revisions may occur after the delivery date.
Step 1: Project Discovery & Requirements Gathering
We’ll start with a kickoff call or detailed brief to understand your business goals, user needs, and technical requirements. This helps us define the scope, core features, and final deliverables.
Step 2: UI/UX Design & Prototyping
Our designers will create wireframes and high-fidelity mockups using modern design tools like Figma. You’ll review and approve each screen before we move forward with development.