You will get Custom Web Application Development with React & Next.js
Top Rated
Project details
I build custom web applications with React and Next.js that are fast, scalable, and designed to support real business growth.
This service is ideal for companies that need:
• High-performance web applications
• Secure backend systems & APIs
• Scalable architecture for growing user bases
• Modern UI with exceptional user experience
• AI-ready systems for future automation & intelligence
What you get:
• Custom web app built with React & Next.js
• Backend development, APIs, and database design
• Performance optimization & security best practices
• Cloud deployment & scalability planning
• Ongoing support for growth and enhancements
Business benefits:
• Faster load times & better user experience
• Systems that scale without breaking
• Reduced maintenance issues
• Strong technical foundation for future features & AI integration
This is web application development built for long-term success, not short-term fixes.
This service is ideal for companies that need:
• High-performance web applications
• Secure backend systems & APIs
• Scalable architecture for growing user bases
• Modern UI with exceptional user experience
• AI-ready systems for future automation & intelligence
What you get:
• Custom web app built with React & Next.js
• Backend development, APIs, and database design
• Performance optimization & security best practices
• Cloud deployment & scalability planning
• Ongoing support for growth and enhancements
Business benefits:
• Faster load times & better user experience
• Systems that scale without breaking
• Reduced maintenance issues
• Strong technical foundation for future features & AI integration
This is web application development built for long-term success, not short-term fixes.
Programming Languages
JavaScript, Python, TypeScriptCoding Expertise
Cross Browser & Device Compatibility, Performance Optimization, SecurityWhat's included
| Service Tiers |
Starter
$200
|
Standard
$500
|
Advanced
$900
|
|---|---|---|---|
| Delivery Time | 5 days | 10 days | 18 days |
Number of Revisions | 2 | 3 | 4 |
Design Customization | - | ||
Content Upload | |||
Responsive Design | |||
Source Code |
Optional add-ons
You can add these on the next page.
Fast Delivery
+$50 - $200Frequently asked questions
4 reviews
(4)
(0)
(0)
(0)
(0)
This project doesn't have any reviews.
MA
Mehmet A.
May 5, 2026
WASM Integration for Existing File Converter Website (libheif & FFmpeg.wasm esc)
A high-quality experience with a deep focus on security and modern tech stacks. Salis successfully bridged the gap between our technical vision and a user-friendly reality. Professional, highly communicative, and technically top-tier.
SS
Savannah S.
Mar 23, 2026
Full stack Developer - FastAPI + React/Next.js
He was always available and did fast and good job. I will hire him again.
SH
Sam H.
Feb 2, 2026
Full Stack Developer Needed for Svelte 5 and Python Project
Salis is a talented developer who can handle lots of complexity.
JI
Javed I.
Jan 7, 2026
Fix AI Agent Hallucination & Response Loop in Next.js LLM App
Salis demonstrated a deep understanding of LLM-based agent systems and modern Next.js architectures. He resolved critical hallucination and infinite-loop issues by restructuring the system prompt, correcting conversation memory handling, implementing deterministic termination conditions, and stabilizing token streaming to the UI, all within 3 hours. His fixes significantly improved response accuracy, system reliability, and overall user experience. Clear communication and production-level execution throughout.
About Salis
Full Stack Engineer | AI Integration, SaaS Platforms & Web Apps
100%
Job Success
Islamabad, Pakistan - 4:30 am local time
Most teams I work with already have a product or platform. The challenge is performance, scalability, and automation. Web applications are slow, backend systems don’t scale, operations rely on manual work, and data is not leveraged to drive decisions. I redesign the entire system; frontend, backend, APIs, database, cloud infrastructure, and AI automation so technology works as a business engine rather than a bottleneck.
I act as a long-term technical partner across product architecture, UI/UX, backend systems, API design, database optimization, cloud deployment, security, and AI integration. So, if you are launching a new SaaS platform, modernizing a legacy system, or embedding AI automation into operations, my focus is always on performance, scalability, reliability, and measurable business results.
𝐒𝐮𝐜𝐜𝐞𝐬𝐬 𝐒𝐭𝐨𝐫𝐢𝐞𝐬 & 𝐏𝐫𝐨𝐣𝐞𝐜𝐭 𝐇𝐢𝐠𝐡𝐥𝐢𝐠𝐡𝐭𝐬
➜ Broomstick:
Developed a full stack platform that unified onboarding, operations, and internal workflows while integrating N8N and LangChain for intelligent automation. Reduced manual workload by 40%, accelerated team execution by 30%, and cut task completion time by 2x.
➜ Premed:
Built a high-performance SaaS platform focused on API design, backend optimization, and scalable architecture. Increased system speed by 50%, improved reliability with 0 downtime incidents in 6 months, and enabled scaling to 10x more users without additional infrastructure cost.
➜ Fairticket:
Engineered a transaction-heavy system with real-time processing, automated workflows, and AI-driven decision tools using Hugging Face and Zapier. Improved transaction reliability by 99.8%, reduced operational risk by 60%, and shortened transaction processing time by 70%, enabling the platform to scale rapidly during peak demand.
𝐂𝐨𝐫𝐞 𝐒𝐞𝐫𝐯𝐢𝐜𝐞𝐬 & 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞
➜ Full stack development for web and SaaS platforms
➜ Backend architecture, API design, and database optimization
➜ AI integration, workflow automation, and business process automation
➜ Cloud deployment, infrastructure engineering, and scalable systems
➜ Security-focused development and system reliability
𝐓𝐞𝐜𝐡𝐧𝐨𝐥𝐨𝐠𝐲 𝐒𝐭𝐚𝐜𝐤
➜Frontend: React.js, Next.js, Svelte.js, TypeScript
➜Backend: Node.js, Express.js, FastAPI, Python, NestJS
➜Mobile: React Native
➜Databases: MongoDB, PostgreSQL, MySQL
➜Cloud & Infrastructure: AWS, GCP, Docker, Kubernetes, Terraform, CI/CD
➜AI & Automation: N8N, LangChain, Hugging Face, Zapier, Browser-Use
If your web platform is slow, expensive to operate, or overloaded with manual processes, 𝒔𝒆𝒏𝒅 𝒎𝒆 𝒂 𝒎𝒆𝒔𝒔𝒂𝒈𝒆 𝒘𝒊𝒕𝒉 𝒚𝒐𝒖𝒓 𝒄𝒖𝒓𝒓𝒆𝒏𝒕 𝒎𝒐𝒏𝒕𝒉𝒍𝒚 𝒓𝒆𝒗𝒆𝒏𝒖𝒆 𝒂𝒏𝒅 𝒚𝒐𝒖𝒓 𝒃𝒊𝒈𝒈𝒆𝒔𝒕 𝒕𝒆𝒄𝒉𝒏𝒊𝒄𝒂𝒍 𝒃𝒐𝒕𝒕𝒍𝒆𝒏𝒆𝒄𝒌.
I will review your system and show you exactly where full stack optimization and AI automation can unlock growth.
Steps for completing your project
After purchasing the project, send requirements so Salis can start the project.
Delivery time starts when Salis receives requirements from you.
Salis works on your project following the steps below.
Revisions may occur after the delivery date.
Requirements analysis and architecture
I review your requirements, existing systems (if any), and constraints, then define the architecture: frontend structure, API design, database schema, and deployment approach.
Implementation of frontend and backend
I implement the React/Next.js frontend and backend APIs, integrate the database, and wire up authentication, authorization, and core business logic based on the selected tier.