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$40/hr
100%
Job Success
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Are you struggling to scale your complex applications, integrate cutting-edge AI, or ensure your e-commerce platform performs flawlessly under pressure? With over 15 years of experience, I specialize in transforming these challenges into robust, high-performing solutions. I am a seasoned Full-Stack and AI/ML Architect, dedicated to building, scaling, and rescuing production systems across diverse industries.
My expertise spans robust web application development, cloud-native infrastructure, and cutting-edge AI/ML solutions, ensuring performance, reliability, and scalability from MVP to enterprise-grade products. I excel in integrating complex systems, handling high-traffic APIs, and evolving products with measurable business outcomes. My work is production-grade, engineered for zero-failure environments, and focused on delivering tangible value.
Proven Impact:
• Accelerated product launch by 30% for a SaaS platform through optimized CI/CD pipelines and cloud infrastructure.
• Reduced operational costs by 25% by implementing efficient microservices architecture and serverless solutions
• Increased user engagement by 40% with AI-powered personalized features in an e-commerce application.
• Successfully migrated a legacy system to a modern cloud-native stack, resulting in 99.9% uptime and improved maintainability.
𝐖𝐡𝐚𝐭 𝐈 𝐃𝐞𝐥𝐢𝐯𝐞𝐫:
→ SaaS Platforms & Complex Applications: Scalable multi-tenant systems for B2B SaaS, analytics, and automation. Subscription billing, access control, and audit trails for enterprise and FinTech products. Automation pipelines and API ecosystems designed for real-world scale.
→ E-commerce & CMS Engineering: Shopify apps, headless storefronts, and WooCommerce optimization for DTC and marketplace retailers. Checkout logic, subscription management, and funnels integrated with Stripe and PayPal. SEO-optimized, API-driven, high-conversion commerce systems.
→ 𝙁𝙞𝙣𝙏𝙚𝙘𝙝 & 𝘽𝙪𝙨𝙞𝙣𝙚𝙨𝙨 𝙄𝙣𝙩𝙚𝙜𝙧𝙖𝙩𝙞𝙤𝙣𝙨: Secure APIs for CRMs, payments, and reporting systems. OAuth2, GraphQL, and webhook orchestration. PCI-compliant reconciliation workflows and automated data integrity.
→ FinTech & Business Integrations: End-to-end Custom Generative AI systems using LLMs (OpenAI, Anthropic, Gemini), LangChain, and RAG pipelines. AI assistants, semantic search, NLP automation, and ML integrations embedded in SaaS ecosystems. Automated model deployment, data pipelines, and continuous training with AWS SageMaker, Docker, Kubernetes, and Terraform. Expertise in classification, regression, clustering, predictive analytics, and deep-learning models (CNN, RNN, LSTM) using TensorFlow, PyTorch, and Keras.
→Cloud & DevOps Automation: Zero-downtime deployments on AWS, Azure, GCP, and containerized infrastructure. Kubernetes orchestration, Terraform IaC, CI/CD pipelines (Jenkins, GitHub Actions). Monitoring, cost optimization, and performance tuning via Datadog, Prometheus, and New Relic.
𝙏𝙚𝙘𝙝 𝙎𝙩𝙖𝙘𝙠 𝙀𝙭𝙥𝙚𝙧𝙩𝙞𝙨𝙚:
React, Next.js, Vue, Angular, TypeScript, JavaScript, Tailwind, Bootstrap, Material UI, SSR/SSG, Redux, Zustand.
Ruby on Rails ROR, Node.js (Express, Nest), Laravel, PHP, Python (Django, FastAPI), REST, GraphQL, WebSockets, background jobs (Sidekiq, BullMQ, Celery).
PostgreSQL, MySQL, MongoDB, Redis, DynamoDB, Elasticsearch, OpenSearch, Pinecone, Weaviate, FAISS.
CMS and eCommerce: WordPress, WooCommerce, Shopify, Shopify Plus, LearnDash, BuddyBoss Framer Figma
Microservices, Modular Monoliths, Event-Driven Systems (Kafka, SQS, SNS, RabbitMQ), Multi-Tenant SaaS, Headless Commerce, API Governance.
AWS (EC2, RDS, Lambda, S3, CloudFront, SES, SageMaker), GCP, Azure, Docker, Kubernetes, Terraform, Jenkins, GitHub Actions, CI/CD.
OpenAI, LangChain, Hugging Face, TensorFlow, PyTorch, Keras, embeddings, RAG, NLP, semantic search, AI automation.
Datadog, New Relic, Prometheus, Grafana, Sentry, OAuth2, OIDC, SAML, WAF, KMS encryption, rate limiting.
Automation n8n make zapier
𝙒𝙝𝙮 𝙒𝙤𝙧𝙠 𝙒𝙞𝙩𝙝 𝙈𝙚?
I offer a unique combination of deep technical expertise, end-to-end ownership, and a relentless focus on performance and reliability. My approach ensures that every project is executed with precision, transparency, and a commitment to delivering lasting value.
Whether you’re launching a new SaaS, migrating a legacy system, integrating AI-powered features, or scaling your Machine Learning infrastructure, I’ll architect, automate, and deploy it cleanly, once, and built to last. I am always open to a real conversation about your project needs.
𝙎𝙚𝙚 𝙮𝙤𝙪 𝙞𝙣 𝙩𝙝𝙚 𝙘𝙝𝙖𝙩!
Associated with
Cyber Nest
$40/hr
93%
Job Success
$100K+ earned
Available now
Offers consultations
Start of list.
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Hi there, and welcome!
I’m Jonathan, founder of Camlab Animation Studios, a boutique creative studio known for producing award-winning animation with heart, soul, and cinematic impact. I’m an Animator, Director, Software Engineer, and lifelong artist who’s spent over 20 years designing, animating, and building digital experiences from the ground up.
Whether you're a solo creator or a major brand, I offer two ways of working:
Solo Projects: For clients seeking a personal touch or streamlined scope, I handle everything directly—design, animation, storytelling, and polish.
Studio Team: For larger productions, I lead a team of top-tier collaborators—artists, compositors, sound designers, and developers—who’ve worked on globally recognized projects. Together, we build full-scale productions that have gone on to win awards, land on streaming platforms, and compete at the international level.
Who have I worked with?
Emmy-winning directors
Grammy-winning musicians
The United Nations
Stock exchange firms and global NGOs
Tech startups and mobile app companies
Authors, filmmakers, educators, and children’s brands
Our work spans commercial campaigns, explainer videos, animated short films, book trailers, music videos, branded content, and narrative series—tailored for all platforms and age groups.
How do I work?
Inspired by storytelling masters like Pixar, Studio Ghibli, and DreamWorks, I’ve crafted streamlined pipelines that merge 2D, 3D, and painterly visual styles. Whether using Blender, After Effects, or hand-drawn animation techniques, my goal is simple: bring your vision to life in the most visually captivating, emotionally resonant way possible.
If you're looking for:
A solo artist who can take your project from idea to delivery
A studio partner to help you build something ambitious and bold
Or someone who just cares as much as you do about doing it right—
You’re in the right place.
Feel free to message me for quotes, availability, or to view my full portfolio.
Cheers and blessings,
Jonathan Camargo
Founder & Creative Director | Camlab Animation Studios
$30/hr
95%
Job Success
$100K+ earned
Available now
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Stop losing revenue to a slow, confusing, or outdated website.
I am a Top-Rated Web Developer & E-commerce Specialist with 10+ years of experience building high-converting Shopify, WordPress, and Webflow sites. I bridge the gap between stunning UI/UX Design and rock-solid Front-End Development to deliver websites that don't just look good they rank #1 on Google and turn visitors into buyers.
✅ THE BOTTOM LINE:
You don't need just "code." You need a partner who understands ROI, Conversion Rates, and User Experience. Whether you need a pixel-perfect Figma to HTML conversion, a complex Shopify 2.0 build with custom Liquid, or a scalable WooCommerce store, I deliver clean, semantic, and bug-free code.
⬇️ SCROLL DOWN FOR FULL TECHNICAL SKILL LIST ⬇️
🚀 CORE SERVICE AREAS
1. SHOPIFY DEVELOPMENT & E-COMMERCE (Shopify Expert)
Build a store that sells while you sleep.
Builds: Custom Shopify Theme Development, Shopify 2.0, Shopify Plus, Multi-Vendor Marketplaces.
Technical: Liquid Coding, JSON Templates, Metafields, Custom Sections, API Integration.
Setup: Dropshipping (Oberlo/Spocket), Print-on-Demand, Store Migration (Woo/Wix to Shopify).
Optimization: Shopify Speed Optimization (Core Web Vitals), CRO (Conversion Rate Optimization), Upsell/Cross-sell funnels.
Apps: Integration with Klaviyo, Yotpo, Recharge, PageFly, GemPages, Shogun.
2. WORDPRESS & WOOCOMMERCE
The world's most powerful CMS, tuned for performance.
Development: Custom Theme Development, Plugin Customization, PHP Development.
Builders: Expert in Elementor Pro, Divi, WPBakery, Oxygen, Beaver Builder, Gutenberg.
WooCommerce: Complex Checkout Flows, Subscriptions, Payment Gateways (Stripe/PayPal/Razorpay).
Maintenance: Malware Removal, Site Speed Up, Database Optimization, Migration.
Advanced: ACF (Advanced Custom Fields), CPT UI, LMS (LearnDash), Membership Sites.
3. WEBFLOW DEVELOPMENT
No-code speed with pro-code power.
Conversion: Pixel-perfect Figma to Webflow, XD to Webflow, Sketch to Webflow.
Features: Webflow CMS, Advanced Interactions & Animations (Lottie/GSAP), MemberStack.
SEO: Semantic HTML structure, 301 Redirects, Open Graph settings.
4. FRONT-END DEVELOPMENT & CUSTOM CODE
Languages: HTML5, CSS3, JavaScript (ES6+), jQuery, PHP, MySQL, Liquid.
Frameworks: Bootstrap, Tailwind CSS, SCSS/SASS, React.js, Vue.js (Basic).
Tools: Git, GitHub, npm, Webpack, cPanel, DNS Management.
5. UI/UX DESIGN & PROTOTYPING
Design: Landing Page Design, Mobile-First Design, Website Redesign, Wireframing.
Tools: Figma, Adobe XD, Photoshop, Illustrator, Canva.
Focus: Accessibility (WCAG), User Journeys, A/B Testing.
6. DIGITAL MARKETING & INTEGRATIONS
SEO: Technical SEO, On-Page SEO, Schema Markup, Google Analytics 4 (GA4), Google Tag Manager.
Integrations: CRM (HubSpot/Salesforce), Email Marketing (Mailchimp/ActiveCampaign), Zapier Automations.
Social: Facebook Pixel, Pinterest Tag, Instagram Shop Setup.
💡 WHY CLIENTS HIRE ME (Your Guarantee)
Communication: No radio silence. I provide daily/weekly updates and explain technical jargon in plain English.
Speed: I obsess over Google PageSpeed scores. Your site will load instantly.
Support: I provide free video tutorials (Loom) upon handover so you can manage your site easily without paying a developer for every small change.
Reliability: 100% Job Success mentality. I treat your business like my own.
🎯 INDUSTRIES SERVED:
Fashion & Apparel, Beauty & Cosmetics, B2B SaaS, Real Estate, Restaurants, Health & Wellness, Tech Startups, Non-Profits, Photography Portfolios.
👋 READY TO START?
Your project deserves more than a template. Let's build a digital experience that scales.
Click the green "Invite" or "Hire" button at the top right of the page, and let’s discuss your vision!
Chandresh
Your Partner in Digital Growth
Associated with
10TURTLE LLC
$500K+
earned
$15/hr
99%
Job Success
$400K+ earned
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With 13+ years of entrepreneurial experience, Mr. Thakur currently serves as the Chief IT Architect for Sunfocus Solutions Pvt. Ltd, a leading MOBILE & WEB APPLICATION development company which he founded in 2012 and 𝐑𝐀𝐓𝐄𝐃 𝐀𝐒 ✔️ 𝐓𝐎𝐏 𝐑𝐀𝐓𝐄𝐃 𝐏𝐋𝐔𝐒 Service provider.
Previously, Mr. Thakur has served as a technology consultant and advisor to two early-stage B2B mobile and web advertising companies. With his extensive experience working alongside CEOs, COOs, and CTOs globally, he has helped numerous businesses select and implement large-scale, complex technology solutions. His expertise spans information management, operational leadership, and executive decision-making, making him a trusted partner for organizations seeking technical excellence.
At Sunfocus Solutions, we specialize in building high-performance, large-scale mobile and web products. Our approach combines system analysis, strategic planning, consultative branding strategies, and responsive development techniques using Agile methodology to deliver outstanding results in every project.
𝐀𝐫𝐞𝐚𝐬 𝐨𝐟 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞:
Mobile Application Development (iOS, Android)
Web & Blockchain Consulting
Artificial Intelligence & Machine Learning
AI Frameworks: OpenAI (ChatGPT API), LangChain, TensorFlow, Keras.
AI Services: Document Intelligence, Vision, Speech, AI Search
Enterprise Portals & Identity Access Management
Healthcare & Fitness & Finance Solutions
Social Media & Dating Applications
Retail & E-commerce Development
CRM Software Development
Custom Enterprise Solutions
Payment Processing Solutions
AI & IoT Connectivity Solutions
On-demand apps (Food, Grocery, Pickup Delivery, Taxi Booking, Home Services, Beauty & Salon Booking, Club APPs, Laundry Services, Restaurant apps, car apps, mechanics apps, marketplace solutions)
Online Learning Platforms
Real-Estate Solutions
Data Visualization & Enterprise Cloud Computing
Mr. Thakur has a deep passion for learning and implementing new technologies at their early stages. His career has been centered around providing impactful solutions in Retail, E-commerce, Healthcare, higher education, Fitness, Research, and Data Analytics for businesses and leading universities worldwide.
With a client-first approach, Mr. Thakur ensures that every challenge is understood thoroughly, and tailored, and high-quality solutions are delivered in real-time. He is always available for consultations via Skype, Zoom, or phone calls/IM. He firmly believes that the best way to deliver exceptional software products and services is by forming long-term partnerships with his clients.
Associated with
Sunfocus Solutions Private Limited
$5M+
earned
$55/hr
100%
Job Success
$500+ earned
Available now
Offers consultations
Start of list.
End of list.
Most developers deliver code. As a Top Rated Plus Full Stack Developer, Mobile App Developer, and SaaS Developer with a 100% Job Success Score on Upwork, I deliver systems - ones that teams can confidently run, scale, and build on. Whether it is Mobile App Development, SaaS Development, or a full stack web product, I stay accountable for it long after the first release.
Specialized in Full Stack Development and Mobile App Development with a strong focus on React Native, Flutter, Python, and SaaS Development architecture. As an experienced Full Stack Developer and Mobile App Developer focused on cross-platform iOS and Android apps and SaaS platforms, I work across the entire stack - from React Native and Flutter mobile apps to Python, Node.js, and Laravel backends. With a strong background in SaaS Development, backend API design, and mobile-connected platforms, I bring a backend-first mindset and deep attention to scalability and long-term maintainability. Proficient in React Native, Flutter, Python, Node.js, AWS, and Microsoft Azure as a Software Developer and Senior Web Developer.
Core Specializations
Full Stack Mobile App Development
As a Full Stack Mobile App Developer and React Native Developer, I deliver cross-platform iOS and Android applications that perform like native products. As a Flutter Developer and Flutter Mobile App Development specialist, I build unified experiences where a shared codebase does not mean compromising quality. As a Mobile App Developer covering mobile app design, mobile app development, and full deployment lifecycle, I treat performance and reliability as non-negotiable from day one - not afterthoughts.
Full Stack Web & React Development
As a React Developer and Full Stack Developer, I build end-to-end web solutions using React, Vue, Next.js, and TypeScript on the frontend. As a Web Developer handling both Web Design and component architecture, I create scalable, maintainable interfaces backed by Python (FastAPI, Django, Flask), Node.js, and Laravel. As a Full Stack Developer with React and Node.js expertise, I own delivery from database schema to deployed product - clean API contracts, proper state management, and optimized data flow across every layer.
SaaS Development & Backend Architecture
As a SaaS Developer, I design and build SaaS Development platforms from MVP to mature multi-tenant products - including subscription logic, role-based access, and SaaS business development-ready architecture. As a Python Full Stack Developer and Backend Developer, I build robust APIs with Node.js and Python for high concurrency workloads. As a Full Stack Developer PHP specialist, I support Laravel and PHP-based ecosystems when projects require it. As a DevOps-minded engineer and React Native Developer, I manage infrastructure as code across AWS and Microsoft Azure environments.
AI Integration & Cloud Infrastructure
As a Full Stack Developer focused on AI Integration, I connect web and mobile frontends to AI-powered backends - implementing smart search, real-time suggestions, and LLM-driven features using OpenAI API and LangChain. As an AWS Architect with expertise in AWS (Lambda, S3, DynamoDB), Microsoft Azure, and Azure DevOps, I ensure data handling is high-speed, cost-effective, and secure across Web, iOS, and Android platforms. As a React Web Development and API Integration specialist, I build the connective layer that makes AI functionality feel responsive and production-ready.
Clients typically work with me when they need:
- Full Stack Developer to own frontend and backend
- Mobile App Developer for React Native, Flutter, and native iOS/Android
- SaaS Developer for SaaS Development platforms built to scale
- React Developer or React Native Developer for web and mobile projects
- Python Full Stack Developer or Backend Developer for API-driven systems
- Senior Web Developer or Front End Developer with full stack depth
- AI Integration and API Integration for new or existing platforms
- AWS Architect or Azure-based cloud infrastructure and DevOps pipelines
Technical Expertise
- Mobile: React Native, Flutter, Swift, Kotlin, TypeScript, Redux Toolkit, React Query
- Frontend: React, Vue, Next.js, TypeScript, Tailwind CSS
- Backend: Python (FastAPI, Django, Flask), Node.js, Laravel, PHP, REST & GraphQL
- AI & Automation: OpenAI API, LangChain, Vector Databases, RAG, AI Machine Learning
- Data & Cloud: AWS (S3, Lambda, DynamoDB), Microsoft Azure, PostgreSQL, Redis
- Tools: Docker, CI/CD, Git, Stripe, DevOps pipelines
I do not take on Wordpress developer projects, SaaS marketing, Google Ads, or Digital Marketing.
If you need to build a product from scratch, ship an MVP, or scale an existing SaaS Development platform - as a Full Stack Developer and Mobile App Developer, let us discuss your project.
Associated with
🔺 Jett Develops | Full-Cycle Design and Development Company, $250M Raised by Clients
$500K+
earned
$20/hr
100%
Job Success
$400K+ earned
Available now
Offers consultations
Start of list.
End of list.
With 15+ years of experience and 500+ completed projects, I build high-converting Shopify stores, custom WordPress websites, and scalable e-commerce platforms that drive revenue.
I bridge the gap between traditional CMS platforms and advanced full-stack technology. Whether you need a bespoke WooCommerce setup, custom Liquid themes, API integrations, or web speed optimization, I deliver clean code that scales your business operations.
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💡 Core E-Commerce & CMS Services
• Shopify Development: Custom Liquid theme modification, storefront setup, application integration, and conversion optimization.
• WordPress & WooCommerce: Bespoke theme/plugin development, page builder mastery (Elementor, Divi), and complex database architectures.
• Performance Engineering: Core Web Vitals optimization, site speed enhancement (90+ mobile scores), and malware security removal.
• Payment Gateways: Advanced Stripe, PayPal, and subscription billing architecture setups.
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⚡ Advanced Full-Stack & API Integrations
Unlike basic page-builders, my 15-year programming background allows me to build custom enterprise features directly into your website:
• Custom Backends & Databases: PHP, Laravel, Node.js, Express, MySQL, and PostgreSQL.
• Headless CMS & Modern Frontends: Connecting WordPress or Shopify to modern React, Next.js, and Supabase frameworks.
• API & Third-Party Connections: Developing custom REST APIs and GraphQL endpoints to link your site with your internal business tools.
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🤖 AI & Workflow Automation
I streamline your business operations by connecting your website to smart automation systems:
• Workflow Automation: Building background pipelines using n8n, Make, and Zapier.
• CRM & Tools Syncing: Auto-syncing your customer data directly into your custom CRM systems.
• AI Integrations: Adding OpenAI assistants, smart chat systems, and automated product description tools to your store.
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🎯 My Approach
Clean code. High conversion rates. Secure architecture. Responsive communication.
I do not just build websites that look good - I build high-performance systems designed to increase your sales and handle real user traffic without slowing down.
Md Raihan R.
has worked
.
Associated with
Elvira Infotech Private Limited - ISO 9001:2015 Certified Web & Mobile App Development Company
$300K+
earned
$20/hr
100%
Job Success
$100K+ earned
Start of list.
End of list.
Fast, reliable and trustworthy!
• Over 10 years experienced in creating and designing professional Digital Forms (PDF)
• Proven record of honesty and discretion when handling business information
• Very fast turnaround, strong focus on deadline, complete projects within the desired time frame, and if possible usually before the given due date.
• Quality without compromise, 100% client satisfaction
• Highly skilled in operating a variety of office machines and equipment such as CCTV, Computer, wired/wireless router, fax, scanner and copier
TOP SKILLS:
I. Adobe Acrobat Professional DC
• Interactive or Dynamic PDF
• Fillable / Saveable
• Auto Sum / Calculation
• Auto Text duplication
• Add, Edit or Remove Text
• Merge /Combine / Remove Pages
• PDF to MSword, PowerPoint, Excel
• MSword, PowerPoint, Excel to PDF or vice versa
• Locking or unlocking password protected PDF
• Programming custom Java Script
• PDF eBook
II. Corel Draw/Photo Paint X7
• Designing of Digital Forms, Flyers, Brochures, Magazines, Tarpaulins, Banners
• Photo Alteration / Retouching, Cropping, Resizing
OTHERS SKILLS:
1. Extensive knowledge in other Adobe programs (LiveCycle, Photoshop, Illustrator, InDesign)
2. In-depth knowledge of MS Office applications (Word, Outlook, PowerPoint and Excel)
3. Audacity (Audio / Sound editing)
4. Freemake (Video editing)
5. Magento
6. MailChimp
7. Google Docs (Online Forms, Auto email etc)
8. File Format conversion (MP4, MP4, Avi, Mkv etc)
9. Online Forms - Jotforms, Zoho, HelloSign, HelloWorks, Google Forms
Regular Working Hours :
9-12hrs (Monday to Saturday) * Flexible
US (Central Time): 8pm-10am
South East Asia (GMT+8): 8am-10pm
Australia: 10am-12pm
$55/hr
100%
Job Success
$300K+ earned
Available now
Offers consultations
Start of list.
End of list.
🏆 Top Rated Plus | 100% Job Success Score
SaaS Full Stack Development & Salesforce Architecture - From MVP to Production at Scale
If your project demands a digital product that performs under real load, integrates cleanly with Salesforce, and won't require a costly rebuild in a year - you're in the right place.
Our team combines senior Full Stack engineering (React, Node.js, Python) with 9× certified Salesforce architecture to deliver complete, production-ready business systems. We don't hand off separate pieces - we build the entire stack as one cohesive solution.
🏆 Agency Snapshot
10+ years in production. 250+ projects shipped. 15,000+ development hours.
We own the full product lifecycle - from frontend UX and component architecture to backend services, cloud infrastructure, and real-time CRM synchronization. Every decision is made with your business goals, not just technical preferences, in mind.
Typical client outcomes:
45–65% faster load times and page rendering, even on legacy codebases that were actively bleeding users before the rebuild
30–50% fewer manual operations through targeted automation, replacing repetitive workflows with background jobs and smart triggers that run without human input
40% faster reporting, data sync, and API response, achieved through query optimization, caching layers, and efficient data pipeline architecture
35–50% reduction in post-launch bugs and technical debt, because clean architecture and proper test coverage at the start costs far less than emergency fixes six months later
Platforms built to handle 10x traffic growth without structural rewrites
Mobile apps and web systems that hold up under real load, not just demo conditions
🚀 Core Services
1. Full Stack Web, Mobile & SaaS Development
React, TypeScript, JavaScript frontends with clean component architecture and optimized state management. Backends in Python (Django, FastAPI) and Node.js, with RESTful and GraphQL APIs designed for scale. SaaS platforms, fintech dashboards, transaction systems, admin panels, and SEO-optimized landing pages. Cross-platform mobile with React Native - sharing logic with your existing web ecosystem. AI/LLM integration: GPT-powered dashboards, intelligent UI flows, chatbots, and automated analytics.
2. Salesforce Ecosystem & Enterprise Integration
Custom Apex logic, advanced Flow automation, high-performance Lightning Web Components. Secure REST/SOAP and OAuth2 integrations for real-time sync between your web apps and Salesforce. Experience Cloud portals with custom frontend UX backed by Salesforce data. Large Data Volume (LDV) architecture: indexing, archiving, and sharing model configuration.
3. DevOps, Security & Cloud Infrastructure
Scalable, secure cloud environments on AWS, GCP, and Heroku. Automated CI/CD pipelines via Docker and GitHub Actions (web) and SFDX/Copado (Salesforce).
🔧 How We Work
Discovery - We define goals, user flows, and constraints before writing a line of code.
Architecture - Database models, API layers, and service boundaries designed upfront.
Development - Full Stack and Salesforce teams work in sync; your CRM and web app behave as a single system.
QA & Performance - Stability, security compliance, and API uptime validated under peak load.
Post-Launch - Continuous optimization; most clients see 35–45% efficiency gains within 90 days.
💡 Production Track Record
99.98% API & integration uptime
Up to 2.5× system throughput under traffic surges
52% reduction in manual data handling via automation
Up to 40% savings on cloud infrastructure and technical debt
🌎 Industries: Healthcare · FinTech · SaaS & Enterprise B2B · eCommerce · AI, Data & EdTech
I have worked across all these industries with real production systems behind each one. SaaS is my primary focus with 40+ platforms shipped, from early-stage MVPs to enterprise-grade systems with complex billing, subscription management, and multi-tenant architecture. In Healthcare I have delivered 20+ products with a strong focus on data privacy, compliance, and reliability. FinTech accounts for 15+ projects including payment systems, financial dashboards, and transaction monitoring tools. B2B solutions account for 30+ projects covering internal dashboards, client portals, and enterprise automation. EdTech accounts for 20+ builds, from LMS platforms to interactive learning tools. I have also delivered 10+ eCommerce platforms and 10+ Logistics solutions covering order tracking and supply chain automation. Real Estate accounts for 25+ projects including listing platforms, CRMs, and property management tools.
👑 Leadership & Ownership
I lead our Full Stack and Salesforce engineers as Technical Project Manager - ensuring predictable delivery from first sprint to enterprise scale. 55+ long-term clients. 100% Job Success Score. I take personal ownership of your architecture - no gaps between frontend, backend, and CRM.
📞 Ready to discuss your project? Let's schedule a short discovery call.
Associated with
🔺 Jett Develops | Full-Cycle Design and Development Company, $250M Raised by Clients
$500K+
earned
$30/hr
100%
Job Success
$10K+ earned
Available now
Start of list.
End of list.
𝗡𝗲𝗲𝗱 𝗮 𝗙𝘂𝗹𝗹 𝗦𝘁𝗮𝗰𝗸 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 𝘄𝗵𝗼 𝗰𝗮𝗻 𝗯𝘂𝗶𝗹𝗱 𝗰𝗹𝗲𝗮𝗻, 𝘀𝗰𝗮𝗹𝗮𝗯𝗹𝗲 𝘄𝗲𝗯 𝗮𝗽𝗽𝘀?
I help businesses build reliable full stack web applications using Java Spring Boot, Angular, React, Python, NestJS, and TypeScript.
My work focuses on clean backend architecture, secure APIs, responsive frontend interfaces, database structure, and scalable systems that are easy to maintain long-term.
𝗪𝗵𝗮𝘁 𝗜 𝗰𝗮𝗻 𝗵𝗲𝗹𝗽 𝘄𝗶𝘁𝗵:
• Full Stack Web Application Development
• Java Spring Boot Backend Development
• Angular and React Frontend Development
• Python and NestJS Backend Systems
• REST API Development and Integration
• MySQL and PostgreSQL Database Design
• Authentication, JWT, and Role-Based Access
• Admin Panels, Dashboards, and SaaS Platforms
• AWS Deployment and Docker Environments
• GoHighLevel CRM Setup and Automation Support
𝗖𝗼𝗿𝗲 𝗧𝗲𝗰𝗵 𝗦𝘁𝗮𝗰𝗸:
Backend: Java Spring Boot, NestJS, Python, TypeScript, REST APIs, MySQL, PostgreSQL, JWT
Frontend: Angular, React, JavaScript, TypeScript, Responsive UI, Single Page Applications
Infrastructure: AWS, Docker, cloud deployment, scalable application setup
Automation: GoHighLevel, CRM setup, workflow automation, funnel integrations
𝗛𝗼𝘄 𝗜 𝘄𝗼𝗿𝗸:
• Clean, maintainable code
• Clear and proactive communication
• Scalable architecture, not quick patches
• Frontend and backend built with long-term product growth in mind
𝗥𝗲𝗮𝗱𝘆 𝘁𝗼 𝗯𝘂𝗶𝗹𝗱 𝗮 𝗳𝘂𝗹𝗹 𝘀𝘁𝗮𝗰𝗸 𝘄𝗲𝗯 𝗮𝗽𝗽 𝘁𝗵𝗮𝘁 𝘄𝗼𝗿𝗸𝘀 𝗿𝗲𝗹𝗶𝗮𝗯𝗹𝘆?
Send me your project details and I’ll help you build a clean, scalable application with the right backend, frontend, APIs, database, deployment setup, and automation support.
𝗞𝗲𝘆𝘄𝗼𝗿𝗱𝘀:
Full Stack Developer, Java Spring Boot Developer, Spring Boot, Java Developer, Angular Developer, React Developer, Python Developer, NestJS Developer, TypeScript Developer, REST API Development, API Integration, Backend Development, Frontend Development, Web Application Development, SaaS Development, MySQL, PostgreSQL, AWS Deployment, Docker, JWT Authentication, Admin Dashboard, CRM Automation, GoHighLevel, GHL
$15/hr
97%
Job Success
$30K+ earned
Available now
Offers consultations
Start of list.
End of list.
I’m Rajibul Ahsan, a Senior Full Stack Developer and AI Integration Specialist, helping startups and growing businesses build scalable web apps, mobile apps, MVPs, and AI-powered products. I specialize in cross-platform mobile development with Flutter and React Native (iOS & Android), including full App Store and Google Play publishing support.
96 jobs completed | Top Rated | From frontend and backend to databases, cloud infrastructure, and AI integration — I handle the full development lifecycle myself, so you work with one experienced developer instead of coordinating multiple teams.
I have hands-on experience building fintech apps, health and wellness apps, ride-sharing apps, AI-powered connection-based apps, and SaaS products - taking ideas from zero to one with clean code architecture and scalable backend systems.
Process Overview
- Project Discussion
I first understand your app idea, target users, required features, design preferences, and business goals.
- Planning & Architecture
I create a clear development plan, choose the right tech stack (Flutter, React Native, Node.js, Firebase, or Supabase), and structure the app for scalability, security, and future updates.
- UI/UX Implementation
I build clean, responsive, and user-friendly screens based on your design or wireframe — optimized for both iOS and Android.
- Backend & API Integration
I connect Firebase, Supabase, custom REST APIs, OpenAI or LLM-based AI features, payment gateways, user authentication, push notifications, real-time chat, in-app purchases, and other required systems.
- Testing & Bug Fixing
I test the app on different devices, fix issues, improve performance, and make sure the app runs smoothly across iOS and Android.
- App Store & Google Play Submission
I prepare the final build, handle all store requirements, and support submission to the App Store and Google Play.
- Post-Launch Support
After launch, I can help with updates, bug fixes, new features, and long-term maintenance.
Why clients choose me:
✔ Top Rated on Upwork
✔ 96+ completed projects | $20K+ earned
✔ 0–4 hour response time | Available full-time
✔ Clean code architecture, cross-platform expertise, thorough documentation & App Store submission support
Ready to turn your app idea into a real product? Send me a message or invite me to your job post, and we can schedule a 15-minute call to discuss your idea and next steps.
Associated with
AttoExa Solutions
$30K+
earned