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$30/hr
100%
Job Success
$400K+ earned
Available now
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I help businesses build, optimize, and scale SaaS platforms, web applications, mobile apps, and websites. Leveraging AI-powered development workflows and modern technologies, I deliver scalable, high-performance solutions for startups, agencies, and growing businesses.
My expertise includes WordPress, WooCommerce, Shopify, Webflow, Wix, Squarespace, Framer, Laravel, React, Next.js, Flutter, React Native, Craft CMS
Experienced in AI-powered web design, mobile app development, AI automation workflows, responsive UI/UX, custom website development, AI integrations, MVP development, OpenAI API implementation, chatbot systems, and performance-focused digital experiences for startups, agencies, and growing businesses.
👉 Here’s how I can help you:
• Build SaaS platforms and custom web applications
• Develop and optimize WordPress and WooCommerce websites
• Fix website issues, bugs, and performance problems
• Improve speed, scalability, and system stability
• Build backend systems using PHP and Laravel
• Integrate APIs, CRMs, and third-party services
• Develop and connect mobile applications
• Implement AI integrations and automation workflows
⭐ Key Achievements:
• Extensive experience across WordPress, SaaS, and web applications
• Strong background in fixing and improving live production systems
• Long-term client collaborations for maintenance and scaling
• Proven ability to quickly identify and resolve complex issues
🚀 Working Process:
• Understand the system and project requirements
• Identify issues and define the best approach
• Build or improve using clean, scalable architecture
• Test for performance, stability, and reliability
• Provide ongoing support and improvements
📌 Expertise:
✅ Full Stack Development
• SaaS platforms and scalable web applications
• Frontend and backend architecture
• API integrations and system design
✅ WordPress & WooCommerce
• Custom WordPress development
• WooCommerce store setup and customization
• Theme customization (Elementor, ACF, Gutenberg)
• Website performance optimization
✅ CMS Expert
• Custom CMS development and customization
• WordPress, Craft CMS, Webflow, Wix, Squarespace, Shopify, and Kajabi support
• CMS bug fixing and troubleshooting
• Plugin, theme, and integration issue resolution
• CMS migration, optimization & maintenance
✅ Backend Development (PHP & Laravel)
• Custom backend systems and dashboards
• Role-based access systems
• Database-driven applications
• API integrations and automation
✅ AI & Automation
• AI integrations and workflow automation
• CRM integrations (HubSpot, GHL, Zapier)
✅ Mobile App Development
• Flutter-based mobile applications
• Integration with web platforms and backend systems
✅ Tech Stack:
• Frontend: HTML, CSS, JavaScript, jQuery, AJAX, JSON, Bootstrap, Vue.js, React, Next.js
• Backend: PHP, Laravel, Core PHP
• CMS & Platforms: WordPress, WooCommerce, Shopify, Craft CMS, Webflow, Wix, Squarespace
• Page Builders & Landing Pages: Elementor, Gutenberg, ACF, Landing Page Development
• Mobile: Flutter & React Native (iOS & Android)
• Database: MySQL, MariaDB, PostgreSQL, Firebase (NoSQL)
• Integrations: REST APIs, Third-party APIs, Payment Gateways
• Tools & Automation: Zapier, Make (Integromat), HubSpot, GoHighLevel
• Version Control & Hosting: Git, cPanel, Server & Hosting Management
🔥 Additional Services & Experience:
• Landing page development for campaigns and lead generation
• Website redesign and UI/UX improvements
• Website migration and hosting/server setup
• Performance optimization (Core Web Vitals, speed improvements)
• Security fixes and website hardening
• Membership systems, booking systems, and custom functionality
• Third-party integrations and automation workflows
• Ongoing development support for agencies and long-term projects
💼 Industries I’ve Worked With:
• eCommerce and online stores
• SaaS platforms and startups
• Business and service websites
• Education and learning platforms
• Real estate and listing platforms
• Health, fitness, and coaching businesses
⚒️ What You Can Expect:
• Clear and consistent communication
• Fast response and quick turnaround
• Clean, maintainable, and scalable solutions
Core Expertise & Technologies:
Claude AI, ChatGPT, Cursor AI, AI Web Development, AI Website Design, AI Automation, AI SaaS Development, AI MVP Development, AI Workflow Automation, AI Integration, OpenAI API, GPT-4, AI UI/UX Design, AI Chatbot Development, AI WordPress Development, AI Webflow Development, AI Shopify Development, Mobile App Development, iOS App Development, Android App Development, Hybrid App Development, React Native, Flutter, Progressive Web Apps, React.js, Next.js, Node.js, Laravel, Shopify, Webflow, WordPress, SaaS Platforms, Landing Page Design, Automation Systems, Responsive Web Design, Full Stack Development
If you’re looking for an AI-powered full-stack developer to build, fix, or scale your website, SaaS platform, or mobile app, feel free to send an invite 📩 📞 🤝
Mukul S.
has worked
.
Associated with
Digital4design
$1M+
earned
$50/hr
100%
Job Success
$400K+ earned
Available now
Offers consultations
Start of list.
End of list.
20+ years. Dozens of products shipped. One consistent focus is building systems that don't break when your business grows.
If you're a founder or product team looking for a technical lead who can guide decisions, not just execute tasks, that's exactly what I do.
I work with startups, scale-ups, and established businesses to take ideas from early concept through to stable, scalable products. Whether that's an MVP you need to validate quickly, a mobile app ready for real users, or a SaaS platform built to grow, I stay closely involved on the technical side while keeping the broader product direction on track.
𝗪𝗵𝗮𝘁 𝗺𝗮𝗸𝗲𝘀 𝘁𝗵𝗶𝘀 𝗱𝗶𝗳𝗳𝗲𝗿𝗲𝗻𝘁
Most developers will build what you ask for. My job is to make sure what we build is the right thing and that it won't need a full rebuild when your user base grows or your requirements change.
That means asking the right questions early, flagging trade-offs before they become expensive problems, and making sure every technical decision connects back to your business goals.
𝗪𝗵𝗮𝘁 𝗜 𝗯𝘂𝗶𝗹𝗱
• Mobile Applications - iOS, Android & Cross-Platform
• Full-Stack Web Applications & SaaS Platforms
• AI Features & LLM Integrations (RAG, chatbots, OpenAI, Claude, semantic search)
• MVP Builds from idea to working product, fast
• API Development & Third-Party Integrations
• Backend Architecture built for scale
• Technical Strategy & Product Planning for founders
𝗜𝗻𝗱𝘂𝘀𝘁𝗿𝗶𝗲𝘀 𝗜'𝘃𝗲 𝘄𝗼𝗿𝗸𝗲𝗱 𝗶𝗻
Healthcare & Mental Wellness · Fitness & Sports · Real Estate · Freight & Logistics · Education & E-Learning · Food & Beverage · Financial Services · Social & Community Platforms
Each of these industries comes with its own operational and technical challenges. Having worked across all of them means I can move faster, ask better questions, and avoid the mistakes that slow teams down.
𝗛𝗼𝘄 𝗜 𝘄𝗼𝗿𝗸
I value long-term collaboration over quick handoffs. Many of the clients I've worked with have stayed through multiple development stages, because when a team understands your product deeply, the work gets better and faster over time.
My working style is direct and transparent. You'll always know where things stand, what decisions are coming, and why I'm recommending what I am. No technical jargon for its own sake, just clear communication that keeps the project moving.
𝗛𝗼𝘄 𝗺𝘆 𝘁𝗲𝗮𝗺 𝗶𝘀 𝘀𝗲𝘁 𝘂𝗽 (𝗳𝘂𝗹𝗹 𝘁𝗿𝗮𝗻𝘀𝗽𝗮𝗿𝗲𝗻𝗰𝘆)
I am based in India, where I lead a development team I have built and managed over the years (Differenz System Pvt. Ltd). We also run a US entity, Differenz System LLC, and my partner Drishti C. in Los Angeles is your US-based point of contact when you prefer someone in a US time zone. You get a US business and US-hours communication when you want it, plus a senior, hands-on tech lead (me) and the delivery capacity of a full team behind the build. Every team member works under my direct supervision, and I remain your primary technical lead throughout.
𝗔𝗜 𝗳𝗲𝗮𝘁𝘂𝗿𝗲𝘀 𝗜 𝗯𝘂𝗶𝗹𝗱 𝗳𝗼𝗿 𝗰𝗹𝗶𝗲𝗻𝘁𝘀
I build production AI into web and mobile products: LLM and RAG pipelines (OpenAI, Claude, Gemini), chatbots and AI assistants, semantic and natural-language search, AI document processing and OCR, and recommendation engines. Shipped examples include Food Check AI, CLNSD, and Quick Payable (AI document automation). Every AI feature is built for real-world reliability, with output validation and human-in-the-loop review where the stakes are high, not a demo that breaks in production.
𝗔𝗜-𝗔𝘀𝘀𝗶𝘀𝘁𝗲𝗱 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁
I use AI tools like Claude as part of my development workflow. Not as a shortcut, but as a way to move faster without cutting corners.
In practice, that means using AI to accelerate repetitive groundwork, explore approaches quickly, and pressure-test logic, while every piece of code that goes into a production system is reviewed, understood, and validated by me before it ships.
I don't copy code blindly. AI handles speed. Experience handles judgment. The combination means you get faster delivery without the hidden technical debt that comes from unreviewed, auto-generated code.
𝗟𝗲𝘁'𝘀 𝘁𝗮𝗹𝗸 𝗮𝗯𝗼𝘂𝘁 𝘆𝗼𝘂𝗿 𝗽𝗿𝗼𝗷𝗲𝗰𝘁
If you're building any of the following, I'd like to hear about it:
• A mobile app: iOS, Android, or cross-platform
• A SaaS product or startup MVP
• A scalable web application or backend system
• A platform that's grown beyond its original architecture
Send me a short brief describing what you're building and where you're stuck. I'll review it and come back with honest thoughts on approach, timeline, and what to watch out for.
Fazil Ahmed L.
has worked
.
Associated with
Differenz Solutions
$3M+
earned
$20/hr
100%
Job Success
$100K+ earned
Start of list.
End of list.
Imagine having a website or mobile app that not only looks amazing but also attracts more customers, increases sales, and makes running your business easier. That’s exactly what I help businesses like yours achieve.
With 𝟵 𝘆𝗲𝗮𝗿𝘀 𝗼𝗳 𝗲𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲 as a Senior Web & Mobile App Developer, I specialize in building fast, user-friendly, and scalable solutions using React.js, Node.js, Next.js, and React Native. Whether you're a startup looking to launch your first product, an established business needing a modern web presence, or an entrepreneur seeking a seamless mobile experience for your customers, I have the expertise to make it happen.
🚀𝗪𝗵𝗮𝘁 𝗠𝘆 𝗖𝗹𝗶𝗲𝗻𝘁 𝗦𝗮𝘆𝘀:
⭐Therapy Website Development
"I really liked working with Rohail because I valued his clear and effective written and verbal communication skills—which I think is a real asset for someone in IT. We did have some bumps in the road, but he acknowledged and communicated challenges professionally, and therefore, despite these 'bumps,' I would like to work with him again."
— Nisha Mistry
⭐Restaurant Website Fixes
"Rohail did exactly what I asked of him and got me out of a pinch."
— Michael Garcia
⭐Shopify App Development
"It was a pleasure working with Rohail. The deadlines were respected, and the design was exactly like we wished. I recommend him."
— Marouane Ghiati
⭐Company Website Development
"Rohail was a pleasure to work with & he completed the project to a high quality. I would happily work with Rohail in the future. During this project, there were several unexpected delays, which expanded the initial time frame considerably. Throughout this, Rohail was incredibly patient and kind and continued to collaborate and communicate openly. I truly appreciated working with someone who was able to collaborate & communicate in this way."
— Hannah Berardi
🚀𝗞𝗲𝘆 𝗦𝗸𝗶𝗹𝗹𝘀:
✔ Full-Stack Expertise: Proficient in React.js, Node.js, Next.js, and React Native, creating seamless web and mobile applications.
✔ Cloud & Backend Proficiency: Skilled in Firebase, Google Cloud Platform (GCP), and AWS, ensuring secure and scalable solutions.
✔ CI/CD & DevOps Integration: Implementing Continuous Integration & Continuous Deployment (CI/CD) for seamless updates.
✔ API Development & Integration: Experience in RESTful APIs, GraphQL, and third-party API integrations to enhance functionality.
✔ E-commerce & SaaS Development: Building custom Shopify apps, web platforms, and SaaS solutions that drive business growth.
✔ Mobile App Development: Developing iOS & Android applications using React Native for a consistent cross-platform experience.
📞 Let's Build Something Amazing Together!
If you're looking for a highly skilled web & mobile developer who values clear communication, quality work, and client satisfaction, let’s connect.
💬Message me now, and let's bring your project to life!
Rohail Z.
has worked
.
$15/hr
100%
Job Success
$100K+ earned
Available now
Start of list.
End of list.
I help startups, founders, and businesses with Full Stack Development to build scalable SaaS platforms, AI-powered applications, web apps, and mobile apps using React, Next.js, Node.js, React Native, MongoDB, and OpenAI.
As a Full Stack Developer with 8+ years of experience, I have built and launched 25+ products including SaaS platforms, startup MVPs, AI-integrated systems, healthcare software, eCommerce platforms, marketplaces, CRM systems, LMS platforms, and custom business automation tools.
My expertise includes:
• SaaS MVP Development
• AI Integration & Automation
• React / Next.js Frontend Development
• Node.js Backend & API Development
• Mobile Apps (React Native)
• CRM & Admin Dashboards
• Marketplace Platforms
• Custom Business Automation
I can help you:
• Build scalable SaaS products
• Develop AI-powered features using OpenAI APIs
• Create fast and modern React/Next.js applications
• Build secure backend systems and APIs
• Launch MVPs quickly for startups
• Improve workflows through automation
Industries I’ve worked with include:
• SaaS & Startups
• Healthcare
• eCommerce
• Education
• Marketplaces
• Creator Platforms
• Small Businesses
Why clients work with me:
• Clear communication
• Fast execution
• Business-focused development
• Clean scalable architecture
• Long-term support
Whether you need an MVP, SaaS platform, AI integration, or a complete product built from scratch, I can help turn your idea into a scalable solution.
Suchit B.
has worked
.
Associated with
JAYACHETNA SOFTWARE SOLUTION PRIVATE LIMITED
$1M+
earned
$15/hr
100%
Job Success
$30K+ earned
Available now
Start of list.
End of list.
I help startups build and launch high-performance mobile apps in 4–8 weeks using Flutter.
From MVP to scalable production apps, I focus on speed, stability, and real business outcomes.
I specialize in building Flutter mobile apps with scalable backend systems for startups and growing businesses.
👉 Over the past few years, I have:
• Built 20+ mobile apps (iOS + Android)
• Helped startups launch MVPs in under 6 weeks
• Improved app performance by 30–50%
• Delivered apps supporting 10K+ users
🚀 What I Can Help You With
• Flutter app development (iOS + Android)
• MVP development (fast launch, scalable base)
• API integration & backend (Node.js / .NET)
• Real-time features (chat, notifications)
• Payment integration (Stripe, Razorpay)
• App performance optimization
💡 Why Clients Hire Me
• I focus on launching products fast, not just writing code
• Clean architecture → easy to scale later
• Strong communication → no confusion, no delays
🤜 Send me your idea, and I will help you turn it into a working app.
Dhaval J.
has worked
.
Associated with
Paroksya
$90K+
earned
$25/hr
99%
Job Success
$100K+ earned
Available now
Offers consultations
Start of list.
End of list.
🏆 Upwork Top Rated Plus 💯 100% Job Success Score 🕒 3,000+ Hours on Upwork 🌟 Built 20+ SaaS Application
Are you looking for a Full-Stack Developer with the expertise to bring your web and SaaS ideas to life?
Hi, I'm Vimarsh R. With over 10 years of experience, I specialize in building high-performance web, SaaS, and PWA applications that are both powerful and user-friendly. My mission is to deliver seamless, scalable solutions tailored to meet the unique needs of each client.
I’ve successfully completed over 70 MVP projects on Upwork, all with 5-star reviews, helping clients achieve their digital goals with outstanding results.
Here’s what I can do for you:
✔ Full-Stack Development: Expertise in MERN stack (MongoDB, Express.js, React.js, Node.js) and MEAN stack (MongoDB, Express.js, Angular, Node.js).
✔ Frontend Development: Mastery in HTML5, CSS3, JavaScript, React.js, Angular, and Vue.js.
✔ Backend Development: Building robust server-side applications using Node.js, Express.js, Python, Django, and PHP.
✔ API Integration: Seamlessly connecting third-party APIs and microservices to your platform.
✔ Database Management: Proficient in MongoDB, MySQL, PostgreSQL, and DynamoDB for reliable data handling.
✔ Progressive Web App (PWA) Development: Creating PWAs that offer a native app-like experience on the web.
✔ DevOps: Automating deployment pipelines and managing cloud infrastructure with AWS, Docker, and CI/CD.
✔ SaaS Solutions: Designing and developing scalable SaaS platforms tailored to your business.
✔ Web Design & Optimization: Transforming Figma designs into responsive, fast, and visually appealing websites.
✔ CMS Customization: Specializing in WordPress, Shopify, and WooCommerce customization.
✔ AI Integration: Integrating AI models like ChatGPT to enhance your applications with intelligent interactivity.
✔ Tools: Experienced with Jira, Asana, Trello, Postman, ClickUp, and more.
Industries I’ve Worked With:
🔸 Fintech
🔸 Real Estate
🔸 Marketplace, Retail, and E-commerce
🔸 Transport & Logistics
🔸 Health & Fitness
🔸 Education
🔸 Dating
🔸 OTT/Video On Demand Platforms
🔸 Cyber Security, and more.
My Core Responsibilities Include:
➕ Developing front-end architecture for optimal user experience.
➕ Designing and developing the backend of web applications.
➕ Crafting intuitive user interactions on web pages.
➕ Building and integrating APIs.
➕ Creating and managing servers and databases.
➕ Ensuring applications are responsive across devices.
➕ Debugging and optimizing code for top-tier performance.
➕ Providing excellent problem-solving skills, whether working independently or within a team.
What I Need from You:
→ A clear overview of your project’s objectives.
→ Specific design preferences or inspirations.
→ Content for your application’s pages.
→ Any existing assets or graphics (or I can assist in sourcing them).
Why Choose Me?
📈 Accelerated Project Timelines
🔄 Seamless Integration
🔧 Custom Solutions Tailored to Your Needs
🚀 Scalable and Future-Proof Applications
🎯 Data-Driven Performance Optimization
Let’s build a dynamic web application or SaaS platform that not only meets your needs but exceeds your expectations.
Full-Stack Developer | MERN Stack | MEAN Stack | SaaS Development | API Integration | CMS Customization | WordPress | Shopify | WooCommerce | DevOps | React.js | Angular | Vue.js | Node.js | Express.js | Python | Django | MongoDB | MySQL | PostgreSQL | Figma to HTML | Web Design | Performance Optimization | Cloud Computing | AWS | Docker | CI/CD | AI Integration | ChatGPT
Vimarsh R.
has worked
.
Associated with
Webvoltz Private Limited
$1M+
earned
$60/hr
100%
Job Success
$600K+ earned
Available now
Start of list.
End of list.
15+ years. Dozens of products shipped. One consistent focus is building systems that don't break when your business grows.
If you're a founder or product team looking for a technical lead who can guide decisions, not just execute tasks, that's exactly what I do.
I work with startups, scale-ups, and established businesses to take ideas from early concept through to stable, scalable products. Whether that's an MVP you need to validate quickly, a mobile app ready for real users, or a SaaS platform built to grow, I stay closely involved on the technical side while keeping the broader product direction on track.
𝗪𝗵𝗮𝘁 𝗺𝗮𝗸𝗲𝘀 𝘁𝗵𝗶𝘀 𝗱𝗶𝗳𝗳𝗲𝗿𝗲𝗻𝘁
Most developers will build what you ask for. My job is to make sure what we build is the right thing and that it won't need a full rebuild when your user base grows or your requirements change.
That means asking the right questions early, flagging trade-offs before they become expensive problems, and making sure every technical decision connects back to your business goals.
𝗪𝗵𝗮𝘁 𝗜 𝗯𝘂𝗶𝗹𝗱
• Mobile Applications — iOS, Android & Cross-Platform
• Full-Stack Web Applications & SaaS Platforms
• MVP Builds from idea to working product, fast
• API Development & Third-Party Integrations
• Backend Architecture built for scale
• Technical Strategy & Product Planning for founders
𝗜𝗻𝗱𝘂𝘀𝘁𝗿𝗶𝗲𝘀 𝗜'𝘃𝗲 𝘄𝗼𝗿𝗸𝗲𝗱 𝗶𝗻
Healthcare & Mental Wellness · Fitness & Sports · Real Estate · Freight & Logistics · Education & E-Learning · Food & Beverage · Financial Services · Social & Community Platforms
Each of these industries comes with its own operational and technical challenges. Having worked across all of them means I can move faster, ask better questions, and avoid the mistakes that slow teams down.
𝗛𝗼𝘄 𝗜 𝘄𝗼𝗿𝗸
I value long-term collaboration over quick handoffs. Many of the clients I've worked with have stayed through multiple development stages, because when a team understands your product deeply, the work gets better and faster over time.
My working style is direct and transparent. You'll always know where things stand, what decisions are coming, and why I'm recommending what I am. No technical jargon for its own sake, just clear communication that keeps the project moving.
Where projects require it, I work with a trusted team of developers I have built and managed over the years. Every team member works under my direct supervision, and I remain the primary technical lead and client point of contact throughout. This means you get the reliability of working with a senior lead alongside the delivery capacity of a full team.
𝗔𝗜-𝗔𝘀𝘀𝗶𝘀𝘁𝗲𝗱 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁
I use AI tools like Claude as part of my development workflow. Not as a shortcut, but as a way to move faster without cutting corners.
In practice, that means using AI to accelerate repetitive groundwork, explore approaches quickly, and pressure-test logic, while every piece of code that goes into a production system is reviewed, understood, and validated by me before it ships.
I don't copy code blindly. AI handles speed. Experience handles judgment. The combination means you get faster delivery without the hidden technical debt that comes from unreviewed, auto-generated code.
𝗟𝗲𝘁'𝘀 𝘁𝗮𝗹𝗸 𝗮𝗯𝗼𝘂𝘁 𝘆𝗼𝘂𝗿 𝗽𝗿𝗼𝗷𝗲𝗰𝘁
If you're building any of the following, I'd like to hear about it:
• A mobile app: iOS, Android, or cross-platform
• A SaaS product or startup MVP
• A scalable web application or backend system
• A platform that's grown beyond its original architecture
Send me a short brief describing what you're building and where you're stuck. I'll review it and come back with honest thoughts on approach, timeline, and what to watch out for.
Drishti C.
has worked
.
Associated with
Differenz System LLC
$700K+
earned
$25/hr
93%
Job Success
Available now
Offers consultations
Start of list.
End of list.
I am Sabyasachi Saha, an AI Agent, Full-Stack AI, Workflow Automation, LLM, and SaaS Developer. I work as an individual consultant and hands-on technical architect, backed by my experience as the CEO and Chief AI Scientist of Techno Exponent.
I have completed my PhD from SSBM Geneva with a research focus in Generative AI and Sentiment Analysis. With 20+ years of experience in the IT industry, I help startups, enterprises, and growing businesses build intelligent, scalable, and automation-driven digital products.
My major focus is on AI agents, LLM-based applications, workflow automation, SaaS platforms, full-stack application development, data engineering, and analytics. I combine strong technical knowledge with business understanding, so I can support projects from idea validation, architecture planning, development, integration, automation, and long-term scalability.
I founded Techno Exponent in 2011, and since then, we have helped global businesses with digital transformation, AI solutions, automation platforms, SaaS products, enterprise applications, web/mobile apps, and complete IT solutions. As an individual professional on Upwork, I personally bring leadership experience, AI architecture knowledge, hands-on development understanding, and product-focused thinking to every project.
I can help you with:
✅ AI Agent Development
✅ LLM-Based Applications
✅ ChatGPT / OpenAI / Claude / Gemini Integration
✅ RAG Systems and Vector Databases
✅ AI Chatbots and Voice Bots
✅ Workflow Automation
✅ Business Process Automation
✅ SaaS Product Development
✅ Full-Stack Web Application Development
✅ Data Engineering and Data Analytics
✅ AI-Powered Dashboards and Reporting Systems
✅ CRM, ERP, and Third-Party API Integrations
✅ MVP Development and Product Modernization
I have worked across multiple industries, including healthcare, education, e-commerce, real estate, fintech, logistics, transportation, recruitment, food delivery, dating platforms, blockchain, and enterprise automation. My experience includes AI chatbots, AI calling bots, CV screening platforms, AI interview systems, RAG-based knowledge assistants, analytics dashboards, CRM automation systems, workflow automation platforms, SaaS products, and scalable full-stack applications.
My technical expertise includes:
✅ AI/ML: Generative AI, NLP, LLMs, AI Agents, RAG Systems, LangChain, LlamaIndex, Hugging Face, OpenAI, Claude, Gemini, Computer Vision, Sentiment Analysis, Predictive Analytics
✅ Automation: Workflow Automation, Business Process Automation, AI-Powered Automation, n8n, Make, Zapier, CRM Automation, Email Automation, Lead Automation, API Automation, WhatsApp Automation, Voice Bot Automation
✅ Data: Data Engineering, ETL Pipelines, Data Analytics, Business Intelligence, AI-Powered Dashboards, Reporting Systems, Data Visualization, Data Warehousing, Real-Time Data Processing
✅ SaaS: SaaS Product Development, Multi-Tenant Architecture, Subscription Models, Role-Based Access Control, Admin Panels, User Dashboards, API-First Architecture, Scalable Cloud-Based Platforms
✅ Full-Stack Development: Python, FastAPI, Node.js, Express.js, Django, Flask, Java, PHP, Laravel, React.js, Next.js, Angular, Vue.js, TypeScript, JavaScript
✅ Databases & Cloud: PostgreSQL, MySQL, MongoDB, Firebase, Redis, Vector Databases, Pinecone, Chroma, Weaviate, AWS, GCP, Azure, Docker, Kubernetes, CI/CD
✅ Integrations: Stripe, PayPal, Twilio, WhatsApp API, SendGrid, Google APIs, CRM/ERP Integrations, Payment Gateways, Custom API Development
Achievements:
🏆 Awarded “Most Influential Young Leaders 2021-22” by AsiaOne and Economic Times
🏆 Techno Exponent recognized as Times Leading IT Company 2022
🏆 Techno Exponent recognized as Most Customer-Centric IT Company 2022
🏆 Techno Exponent recognized as Leading App Development Company of the Year 2023
When working with me, you get more than a developer. You get a technical partner who understands business goals, product architecture, AI implementation, automation strategy, scalability, and execution.
My goal is simple: to help businesses turn ideas into intelligent, scalable, and revenue-focused digital products.
If you are looking for someone who understands AI, automation, SaaS, full-stack development, data, and business execution, I would be happy to discuss your project and help you build the right solution.
Sabyasachi S.
has worked
.
Associated with
✔️T- WEB EXPONENT SERVICES Pvt. Ltd. - CMMI Level 5 Company that served NASA, Disney, Red Bull, Amazon, The Wall Street Jounral, etc.
$15/hr
100%
Job Success
$40K+ earned
Available now
Offers consultations
Start of list.
End of list.
Building a SaaS product, marketplace or internal business platform?
I help founders build scalable SaaS platforms, AI-powered applications, marketplaces and mobile apps using React, Next.js, Node.js and React Native.
What I've Built:
- Multi-tenant SaaS Platforms
- Subscription Billing Systems
- Marketplace Platforms
- Booking & Scheduling Platforms
- Operations Management Software
- Admin Dashboards with RBAC
- AI-powered Product Features
- Cross-platform Mobile Apps
Over the last 8+ years I've helped startups and businesses launch products ranging from SaaS platforms and operational software to mobile applications, marketplace systems and internal business tools.
My Approach:
- Clear backend architecture designed for long-term product growth
- Organized APIs & predictable data flow
- Frontend, backend & mobile applications designed as one product ecosystem
- Scalable systems built for long-term product growth
- Focus on reliability, maintainability & real-world usage
Tech Stack:
Frontend: React | Next.js | TypeScript
Mobile: React Native | Flutter
Backend: Node.js | NestJS | Express.js
Databases: PostgreSQL | MongoDB | Redis
Infrastructure: AWS | Docker | CI/CD
Integrations: Stripe | Firebase | Smart Contract Integrations | OpenAI APIs | REST APIs
Recent work includes:
- Investment platform
- Resort operations system
- Marketplace
- Property management
- Healthcare platform
- Logistics platform
- AI-powered educational platform
Industries I work on:
SaaS • Healthcare • Mental Wellness • Fintech • Real Estate • Marketplace Platforms • E-commerce • EdTech • Operations Software • Social Platforms
Whether you're building a new SaaS product, launching an MVP, developing a mobile application or improving an existing platform, I can help take the project from planning and architecture through development, deployment and ongoing support.
Keywords:
SaaS Developer | SaaS Product Development | SaaS MVP Development | SaaS Architecture | Full-Stack SaaS Developer | Web & Mobile App Development | React Native Developer | AI Integration | Payment integration | Stripe Integration | React & Node.js Developer | Next.js Developer | Node.js Developer | NestJS Developer | API Development | REST API Design | Backend Architecture | Scalable API Systems | Database Design | PostgreSQL | MongoDB | Redis Caching | Admin Dashboard Development | Role-Based Access Control (RBAC) | Workflow Systems | Automation Systems | Payment Systems Integration | Stripe Integration | Blockchain API Integration | Wallet Integration | AI Features Integration | OpenAI API | Marketplace Platforms | Booking Systems | Android Development | iOS Development
Sanjay Kumar M.
has worked
.
Associated with
Codewik Infotech Pvt Ltd
$10K+
earned
$20/hr
100%
Job Success
$200K+ earned
Available now
Offers consultations
Start of list.
End of list.
If you are looking for a developer who can turn your idea into a scalable product, you’re in the right place.
I am a 𝐓𝐨𝐩 𝐑𝐚𝐭𝐞𝐝 𝐏𝐥𝐮𝐬 𝐔𝐩𝐰𝐨𝐫𝐤 𝐏𝐫𝐨 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐞𝐫, which means I am part of the top 1% of developers on Upwork with a strong track record of delivering high-quality solutions and maintaining excellent client satisfaction.
Over the years, I have built 𝟏𝟐𝟎𝟎+ 𝐰𝐞𝐛 𝐩𝐥𝐚𝐭𝐟𝐨𝐫𝐦𝐬 𝐚𝐧𝐝 𝐦𝐨𝐛𝐢𝐥𝐞 𝐚𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬 for startups, agencies, and growing businesses worldwide.
My speciality is helping clients build reliable, scalable, and high-performing digital products — from idea validation to launch and long-term maintenance.
💡 𝗪𝗵𝗮𝘁 𝗜 𝗖𝗮𝗻 𝗛𝗲𝗹𝗽 𝗬𝗼𝘂 𝗕𝘂𝗶𝗹𝗱
🤖 𝐀𝐈 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 & 𝐀𝐮𝐭𝐨𝐦𝐚𝐭𝐢𝐨𝐧
I have strong experience building AI-powered applications, including:
✔ AI Agents and AI automation systems
✔ AI integrations for web and mobile apps
✔ AI-powered business tools
✔ Workflow automation using AI
✔ AI chat and smart assistants
This allows businesses to automate operations, improve customer experience, and build smarter digital products.
🌐 𝐖𝐞𝐛 𝐀𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬 & 𝐏𝐥𝐚𝐭𝐟𝐨𝐫𝐦𝐬
✔ SaaS Platforms
✔ Ecommerce Websites
✔ Marketplace Platforms
✔ Crowdfunding Platforms
✔ Booking & Reservation Systems
✔ Business & Corporate Websites
✔ Progressive Web Applications (PWA)
✔ Chrome Extensions
📱 𝐌𝐨𝐛𝐢𝐥𝐞 𝐀𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬
✔ iOS Applications
✔ Android Applications
✔ Cross-Platform Mobile Apps
Examples of mobile solutions I develop:
• HRM Software
• Asset Management Software
• Ecommerce Apps
• Food Ordering Apps
• Social Media Platforms
• Dating Apps
• Cab Booking Apps (Uber-like)
• Courier / Logistics Apps
• QR / Barcode Scanner Apps
• Chat & Messaging Apps
• Photo Editing Apps
🧑💻 𝗠𝘆 𝗧𝗲𝗰𝗵𝗻𝗶𝗰𝗮𝗹 𝗦𝘁𝗮𝗰𝗸
𝐅𝐫𝐨𝐧𝐭-𝐄𝐧𝐝 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭
• React.js
• Next.js
• Angular.js
• Vue.js
• JavaScript / jQuery
• HTML5 / CSS3
• Bootstrap
𝐁𝐚𝐜𝐤-𝐄𝐧𝐝 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭
• Node.js
• Python
• .NET
• PHP
• Laravel
• CodeIgniter
• MVC Architecture
𝐌𝐨𝐛𝐢𝐥𝐞 𝐀𝐩𝐩 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 𝐓𝐞𝐜𝐡𝐧𝐨𝐥𝐨𝐠𝐢𝐞𝐬
• React Native
• Flutter
• Kotlin
• Swift
𝐂𝐌𝐒 & 𝐄𝐜𝐨𝐦𝐦𝐞𝐫𝐜𝐞
• WordPress Development
• WooCommerce Customization
• Custom Plugin / Extension Development
⚙️ 𝗠𝘆 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 𝗣𝗿𝗼𝗰𝗲𝘀𝘀
I follow a structured product development approach to ensure quality and scalability.
1️⃣ Business Analysis
2️⃣ Wireframing & UI/UX Planning
3️⃣ System Architecture Design
4️⃣ Web & Mobile Development
5️⃣ API & Web Services Development
6️⃣ Testing & Quality Assurance
7️⃣ Deployment & Product Launch
8️⃣ Ongoing Support & Maintenance
🧪 𝗧𝗲𝘀𝘁𝗶𝗻𝗴, 𝗗𝗲𝘃𝗢𝗽𝘀 & 𝗗𝗲𝗽𝗹𝗼𝘆𝗺𝗲𝗻𝘁
• Version Control: Git, SVN
• Automation Testing: JMeter, Selenium
• Server Configuration & Deployment
• Performance Optimization
⭐ 𝗪𝗵𝘆 𝗖𝗹𝗶𝗲𝗻𝘁𝘀 𝗖𝗵𝗼𝗼𝘀𝗲 𝗠𝗲
✔ 1200+ Successful Projects Delivered
✔ Top Rated Plus Upwork Professional
✔ Strong Experience in Web, Mobile & AI Development
✔ Scalable Architecture & Clean Code
✔ Reliable Communication & Fast Delivery
✔ Long-Term Technical Partner for Businesses
Many of my clients start with a single project and continue working with me for long-term development partnerships.
💬 𝗟𝗲𝘁’𝘀 𝗧𝗮𝗹𝗸 𝗔𝗯𝗼𝘂𝘁 𝗬𝗼𝘂𝗿 𝗣𝗿𝗼𝗷𝗲𝗰𝘁
If you have an idea, startup, SaaS product, AI project, or mobile app you want to build — I’d love to hear about it.
Send me a message and let’s discuss how we can turn your vision into a successful product.
Vasu N.
has worked
.