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$20/hr
100%
Job Success
$400K+ earned
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As a seasoned programmer, I bring a wealth of technical expertise and a proven track record in native and cross platform mobile app development for iOS and Android platforms. My skills encompass a wide array of functionalities, including Push and APNS, Geo-fencing, Payment processing (card readers), maps, mobile device management, QR code scanners, Blockchain and integrations with services such as Paypal, Stripe, and Parse.
In addition to mobile and backend development, I have hands-on experience integrating AI-powered solutions into applications, including intelligent chatbots, recommendation engines, predictive analytics, Computer Vision and automation workflows. I have worked with modern AI APIs and frameworks to enhance user experience through personalization, smart insights, and real-time decision-making.
Listed below is an overview of my skills and the tools I have worked with.
Languages :
Flutter, FlutterFlow, Dart, React.js, React Native, SwiftUI, Objective-C, Kotlin, T-SQL, C#, JavaScript (ES6+), HTML5, Swift 5+, CSS3, TypeScript, Python, JSON
Frameworks :
Core Foundation, iOS SDK, Core Data, Core Video, Core Location, MapKit, Social Framework, Core Media, AVAudioEngine, Flutter SDK, Material & Cupertino Widgets, Jetpack Compose (basic)
Libraries / APIs :
Core Animation, Facebook SDK, jQuery, Google Maps SDK, AFNetworking, CocoaPods, SQLite, Core Graphics, SpriteKit, Parse iOS SDK, Mixpanel SDK, MailChimp API, Node.js, Supabase, Firebase (Auth, Firestore, FCM, Crashlytics), REST APIs, GraphQL, WebSockets
Tools :
iOS Simulator, Apple Xcode, Android Studio, Visual Studio, VS Code, Git, Bitbucket, GitHub, SVN, Postman, Firebase Console, Fastlane, TestFlight, MailChimp, Jira
Platforms :
iOS 15–26, Android 10–15, Flutter Mobile (iOS & Android), Flutter Web, Flutter Desktop (Windows, macOS, Linux)
CMS / ERP / CRM :
Django-Oscar, Django-SHOP, Mezzanine, Odoo – OpenERP (Open Source ERP & CRM), Headless CMS, Custom Admin Dashboards
Web / Backend Tools :
jQuery, Yahoo UI Library, AngularJS, SQLAlchemy, Peewee, Motor, PyMongo, Django MongoDB Engine, Express.js, NestJS
Server end :
Azure, Firebase, Google Cloud Functions, AWS (EC2, S3, Lambda), Docker, CI/CD Pipelines
Paradigms :
Agile Software Development, Scrum, Kanban, MVC, MVVM, Clean Architecture
Misc :
iOS Video, Backend Integration, Stripe Payments, PayPal, Fintech, Push Notifications, Real-time Sync, Barcode & QR Code (QR Code, DataMatrix, Code39, Code128, PDF417, AZTEC, UPC, EAN)
Storage :
Microsoft SQL Server, Firebird, MySQL, SQLite, MongoDB, DynamoDB, Redis, MemSQL, Firebase Firestore, Cloud Storage
Core specialization in:
- Fintech apps- Payments apps, digital wallets, Loyalty rewards, stock trading, referral
- Utility apps- Call recorder, keyboard, food delivery
- Communication- social networking, audio/video calling
- Real estate apps
- IoT- BLE/ibeacons, Healthcare
- On demand service booking apps
- Sports apps
- AI & Machine Learning – Predictive analytics, recommendation systems, personalization, chatbots, fraud detection, intelligent automation
These verticals can be verified from my profile too.
I'm well versed in using wallet based SDKs including Mastercard, Pay- Pal, Braintree, Simply Commerce, Quickpay, Razorpay SDK etc for e-wallet based applications. I have worked extensively with stock trading apps with vast knowledge in exante.eu, Meta trader 5, socket based programming for real time stock price alerts.
I can integrate a number of crypto-currency wallets for your app including Bit-coin Core, Electrum, Jaxx cryptocurrencies, Rippex and Exodus that offer an easy-to-use interface, better protection against fraud, Lightweight and easy to set up and easy recovery for BTC using a wallet seed.
I thrive on challenges and exhibit hyperactivity when problem-solving. My ability to think deeply and beyond the obvious sets me apart.
Let's collaborate and discuss your ideas. I can help you achieve the best solutions for your business needs.
I just completed one of my ongoing projects and currently seek new avenues.
Associated with
CS Soft Solutions (India) Pvt. Ltd.
$6M+
earned
$45/hr
100%
Job Success
$200K+ earned
Available now
Offers consultations
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Some developers need a full specification before they start thinking. I start solving the moment you start talking.
Whether you are building a new AI-powered SaaS MVP from scratch, or you already have one that is not performing the way it should, I come in as a full stack technical partner, understand the business, and build systems that are production-ready from day one. Not prototypes that need rebuilding in six months. Not demos that break under real load. Actual systems built to scale, using Next.js, Supabase, and modern production-grade infrastructure.
I work on projects starting from $3,000. If that does not align with your budget, I would rather be upfront now, there are plenty of developers at every price point, and finding the right fit matters more than just filling a slot.
𝐖𝐡𝐚𝐭 𝐈 𝐁𝐮𝐢𝐥𝐝:
𝐀𝐈 𝐀𝐠𝐞𝐧𝐭𝐬 & 𝐈𝐧𝐭𝐞𝐥𝐥𝐢𝐠𝐞𝐧𝐭 𝐀𝐮𝐭𝐨𝐦𝐚𝐭𝐢𝐨𝐧:
Production agentic AI systems with real tool use, multi-step reasoning, multi-agent orchestration, and stateful workflows. Claude API, OpenAI API, RAG pipelines, vector search, and LLM orchestration in TypeScript and Python, built for real users, not demos. Whether it is a customer support agent, a voice AI assistant, or a fully autonomous business process, this is my core work.
𝐒𝐚𝐚𝐒 𝐏𝐥𝐚𝐭𝐟𝐨𝐫𝐦 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭:
Multi-tenant SaaS applications with proper data isolation, role-based access, subscription billing, and scalable backend architecture. From MVP to production-ready platform, built to handle growth from day one, not rebuilt when you hit 10,000 users.
𝐀𝐈 𝐂𝐡𝐚𝐭𝐛𝐨𝐭𝐬 & 𝐂𝐨𝐧𝐯𝐞𝐫𝐬𝐚𝐭𝐢𝐨𝐧𝐚𝐥 𝐒𝐲𝐬𝐭𝐞𝐦𝐬:
Production-grade chatbots and conversational AI for customer support, lead qualification, and internal operations. Text, voice, or WhatsApp-based, connected to your real data, not a generic wrapper around an API call.
𝐀𝐈 𝐀𝐮𝐭𝐨𝐦𝐚𝐭𝐢𝐨𝐧 & 𝐖𝐨𝐫𝐤𝐟𝐥𝐨𝐰 𝐒𝐲𝐬𝐭𝐞𝐦𝐬:
Replace manual operations with intelligent automation. n8n workflows, API orchestration, scheduled agents, webhook systems, and internal operational tools that run without human intervention, turning what your team does manually today into something that runs itself tomorrow.
𝐃𝐚𝐬𝐡𝐛𝐨𝐚𝐫𝐝𝐬, 𝐀𝐧𝐚𝐥𝐲𝐭𝐢𝐜𝐬 & 𝐈𝐧𝐭𝐞𝐫𝐧𝐚𝐥 𝐓𝐨𝐨𝐥𝐬:
Real-time dashboards and internal business tools with live data, analytics, and role-based access, built for teams who need clarity, not just another spreadsheet replacement.
𝐀𝐏𝐈 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 & 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧𝐬:
REST APIs, GraphQL, third-party integrations, microservices architecture, and payment systems, including stripe, fintech systems, billing engines, and multi-tenant payment infrastructure. If it has an API, I can connect it, orchestrate it, and make it reliable at scale.
𝐂𝐨𝐫𝐞 𝐒𝐭𝐚𝐜𝐤:
✓Frontend → React, Next.js, TypeScript, Tailwind CSS
✓Backend → Node.js, NestJS, Python, FastAPI
✓Databases → PostgreSQL, MongoDB, Supabase
✓AI & LLM → Claude API, OpenAI API, LangChain, RAG pipelines, vector databases, embeddings, multi-agent systems
✓Automation → n8n, webhook systems, API orchestration
✓Infrastructure → AWS, Docker, CI/CD pipelines, Vercel
✓Payments → Stripe
I genuinely enjoy the first conversation, it is where I start solving before we have even agreed on anything. Tell me what you are building, what is not working, or what you want to create. 𝐈 𝐰𝐢𝐥𝐥 𝐠𝐢𝐯𝐞 𝐲𝐨𝐮 𝐦𝐲 𝐛𝐞𝐬𝐭 𝐭𝐚𝐤𝐞. 𝐍𝐨 𝐩𝐢𝐭𝐜𝐡. 𝐍𝐨 𝐩𝐫𝐞𝐬𝐬𝐮𝐫𝐞. 𝐉𝐮𝐬𝐭 𝐚 𝐬𝐭𝐫𝐚𝐢𝐠𝐡𝐭 𝐚𝐧𝐬𝐰𝐞𝐫 𝐨𝐧 𝐡𝐨𝐰 𝐈 𝐜𝐚𝐧 𝐡𝐞𝐥𝐩.
$45/hr
99%
Job Success
$2M+ earned
Available now
Start of list.
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I'm Rakeshkumar, Co-Founder and CEO of Space-O Technologies - a 170+ engineer team that's shipped 5 unicorn-stage apps and 38+ production AI products since 2010. We transform concepts into products that scale, secure funding, and win user loyalty. From MVP to mass adoption, you get my 16+ years of strategic technical leadership plus the team behind me - fully AI-native and up-to-date with 2026's latest stack.
✳️ Complete Development Services:
→ Mobile App Development (iOS, Android, React Native, Flutter, Swift, Kotlin)
→ Web & SaaS Platforms (Next.js, React, Vue, Angular, TypeScript)
→ Backend & API Engineering (Node.js, NestJS, Python, Go, Ruby on Rails)
→ AI Agents & Agentic Systems (LangGraph, CrewAI, AutoGen, multi-agent orchestration, autonomous workflows, tool-use)
→ AI Automation & Workflow Integration (n8n, Make, Zapier, MCP servers, cross-tool integrations, business process automation)
→ LLM Integration & Custom AI (OpenAI GPT-4o, Claude Sonnet/Opus, Gemini, LLaMA, fine-tuning, embeddings)
→ Voice AI & Conversational AI (Vapi, Retell, LiveKit, ElevenLabs, Whisper, real-time interaction)
→ RAG & Knowledge Systems (LangChain, LlamaIndex, Pinecone, Weaviate, ChromaDB)
→ Custom Software & Enterprise Solutions
→ E-commerce & Marketplace Development
→ Database & Cloud (Postgres, MongoDB, AWS, GCP, Azure, Kubernetes, Docker, Terraform)
→ UI/UX Design & Frontend Excellence
→ Quality Assurance & Security
→ AI MVP Rescue — Lovable, Base44, Bolt, Replit → Production-Grade
✳️ AI Agents, Automation & Agentic Systems We Build:
- Customer support agents that handle tier-1 tickets autonomously
- Sales agents that qualify leads, book meetings, and follow up
- Internal ops agents that run on schedule and integrate with your stack
- Voice agents (inbound + outbound) for receptionist, sales, and support
- Multi-agent workflows that delegate tasks between specialized AI workers
- RAG-powered knowledge agents over your enterprise data
- Custom AI assistants with memory, tool-use, and reasoning
- Cross-tool AI automation pipelines (n8n, Make, Zapier) with AI-driven decision-making
- AI-powered business process automation across CRM, sales, marketing, and ops
✳️ What Sets Us Apart:
✓ Proven Track Record — 5 unicorn-stage apps shipped, $1.4B+ in combined client funding raised, 115M+ combined downloads (named brands in Featured Clients below)
✓ Full-Stack Excellence — Mobile, web, backend, AI, cloud, voice — complete development under one roof
✓ AI-Accelerated Delivery — We ship with Claude Code, Cursor, OpenClaw, and GitHub Copilot
✓ Always Up-to-Date — We adopt the latest LLMs, agentic frameworks, and AI dev tools the day they're production-ready
✓ Rapid MVP — Weeks, not months, with venture-grade quality
✓ Built for Scale — Architecture that handles millions of users from day one
✓ Transparent Process — Daily updates, weekly sprints, direct access to senior leadership
✓ Dedicated Team — Engineers, designers, QA, AI specialists, Customer Success Manager
✓ End-to-End Ownership — From concept validation through launch and growth
✳️ We Scale AI-Generated MVPs to Production:
Built v1 on Lovable, Base44, Bolt, or Replit and hit the wall when you tried to scale, hire, or raise?
What We do:
- Architectural audit + risk report on AI-generated codebases
- Refactor → production-grade (typed, tested, observable, secure)
- Migration from vibe-coded prototypes to real stacks (Next.js, NestJS, React Native, FastAPI, Postgres)
- Ship the v2 your investors can do due diligence on
We read the code first, then quote second. No assumptions, no inflated estimates.
✳️ Free Consultation — What You Get:
✅ Deep understanding of your business operations and the technical opportunities inside them
✅ Expert solutions with honest, no-fluff feedback
✅ Detailed analysis of technical challenges and how to overcome them
✅ Clear timeline and cost estimates for your project
✅ Technology stack recommendations and architecture planning
Whether you need mobile apps, web platforms, SaaS products, AI integration, AI agents, voice agents, AI automation, marketplaces, or enterprise solutions, my team and I craft products that captivate users and attract investment.
My combination of 16+ years of founder experience, hands-on technical depth, and business insight lets me convert complex challenges into refined, ship-ready solutions.
Looking forward to connecting with you!
Associated with
Space-O InfoWeb INC
$7M+
earned
$25/hr
100%
Job Success
$100K+ earned
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I'm a Full Stack Developer who turns complex ideas into production-ready web applications. Over 9,400+ hours and 7 long-term projects on Upwork, all rated 5 stars, I've built everything from healthcare marketplaces to stock photography platforms to AI-powered tools. If it needs a robust backend, a polished frontend, and the architecture to scale, that's exactly what I deliver.
My strength is taking an idea, whether it's a SaaS product, a two-sided marketplace, or a custom business tool, and building it end to end. I don't just write code; I architect solutions that are fast, maintainable, and ready to grow with your business.
What I Build:
- Custom SaaS platforms and marketplace applications
- Healthcare, telemedicine, and appointment booking systems
- High-traffic media platforms and stock photography sites
- Real-time features using WebRTC and websockets
- AI-integrated tools and data-driven dashboards
- Performance-optimized, responsive web applications
Tech Stack:
- Frontend: React, Next.js, Vue.js, AngularJS, HTML5, CSS3
- Backend: Node.js, PHP, Laravel, Django
- Databases: MySQL, PostgreSQL, MongoDB
- DevOps: AWS, Docker, NGINX, cPanel
- APIs: REST, GraphQL, payment gateways, third-party integrations
Whether you need a developer to build from scratch or upgrade and scale an existing platform, I bring the full-stack expertise and long-term reliability to get it done right. Let's talk about your project.
Associated with
Tech Prastish Software Solutions Ltd
$80K+
earned
$40/hr
100%
Job Success
$300K+ earned
Offers consultations
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Hi, I’m a senior full-stack developer and product-minded engineer. I operate as a Full Stack Developer who thinks in terms of business value rather than just tickets. Over the last decade, I've led and coded complex web products for clients across Europe, the US, and the UK. As a Full Stack Developer and Backend Developer, I partner with founders, product owners, and marketing leaders who need a reliable technical partner to build SaaS platforms, CRMs, marketplaces, mobile apps, and high-performance websites.
My work covers the full spectrum of Full Stack Developer responsibilities. As a Backend Developer, I architect scalable APIs and database structures using PHP (Laravel), Node.js, and Python. On the frontend, I build with React, Vue, and Angular. This Full Stack Developer versatility extends to React Native for mobile, where I function as a Mobile App Developer, and to custom WordPress solutions, where I serve as a WordPress Developer. Whether it's a Python Full Stack Developer scenario with Django/FastAPI or a .NET Full Stack enterprise environment, I adapt.
⚙️ What I Do Best
Full Stack Developer ownership from architecture to launch and support.
Backend Developer focus on SaaS platforms, booking engines, and internal tools.
Full Stack Developer React Node ecosystems: interactive dashboards and complex workflows.
WordPress Full Stack builds that are fast, secure, and easy for marketing teams to edit.
Mobile App Developer delivery via React Native, fully integrated with custom backends.
Senior Fullstack Developer guidance for integrations: CRMs, ERPs, payment gateways, and custom APIs.
🚀 Real Project Examples
📦 Self-Storage Ecosystem (EU)
As lead Full Stack Developer and Backend Developer, I built a booking tool with ERP and payment automation (Full Stack Developer Laravel stack with Vue). This Full Stack Developer work took online reservations from zero to 170+ monthly and tripled signed contracts.
🎓 EdTech Matching Platform
As Senior Fullstack Developer, I delivered three interconnected applications (Laravel/Vue) with a matching engine and accounting integrations. The Full Stack Developer React Node architecture increased sales by 190% year-over-year while keeping operations lean.
🐾 Social Utility App for Pet Owners
Acting as both Mobile App Developer and Backend Developer, I built a React Native app and Laravel backend with maps, social features, and AI helpers. This Full Stack Developer project seamlessly blended native mobile and web.
📊 SEO Analytics SaaS
In a Python Full Stack Developer role, I designed microservices with FastAPI and Node.js for high-load APIs and React frontends. The Full Stack Developer architecture processes thousands of active users reliably.
🧹 Cleaning Service Group Automation
As a WordPress Developer and Full Stack Developer PHP expert, I built a custom CRM/ERP with scheduling and telephony integrations. The Web Developer and Backend Developer work automated coordination across three brands.
🛠 Tech I Use Daily
Backend: PHP (Laravel, Filament), Node.js, Python
Frontend: React, Vue, Nuxt, Alpine.js
CMS: Custom WordPress Full Stack themes and plugins
Mobile: React Native (I function as a Mobile App Developer)
DB: MySQL, PostgreSQL, Redis
DevOps: AWS, Docker, CI/CD
APIs: Stripe, Mollie, Google API, OpenAI
🤝 How I Work
✅ I own delivery as a Full Stack Developer: architecture, code quality, and deadlines.
✅ I'm transparent about scope and risks as your Backend Developer partner.
✅ I take Full Stake ownership of outcomes, not just outputs.
✅ I can join ongoing projects or build from zero to scale.
✅ I act as a Web Developer and Senior Fullstack Developer who bridges technical execution with business impact.
💡 Why Clients Choose Me as Their Full Stack Developer
Beyond writing clean code, I function as a true Full Stack Developer consultant. I've rescued stalled projects, modernized legacy PHP systems, and transitioned businesses from manual spreadsheets to fully automated WordPress Full Stack portals. As a React Developer at heart, I ensure every interface is intuitive and fast. Whether you need a Mobile App Developer for a companion app or a Backend Developer to untangle complex data flows, I bring Full Stack Developer React Node expertise and a Full Stake mindset to every engagement. My experience across .NET Full Stack environments and as a Python Full Stack Developer ensures I can evaluate the right tool for your specific business challenge, not just the one I know best. I'm comfortable acting as a fractional CTO or a Senior Fullstack Developer embedded with your existing team.
As a Full Stack Developer and Backend Developer, I deliver React, Node.js, PHP, Mobile App Developer results, WordPress Developer sites, Python Full Stack Developer APIs, .NET Full Stack insights, and Full Stake commitment. Senior Fullstack Developer ready.
$15/hr
100%
Job Success
$30K+ earned
Available now
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🚀 Bring Your Ideas to Life with Immersive Games, AR/VR & 3D Experiences!
Hi, I’m Ihtisham — a dedicated Unity Developer, Technical Artist, and AR/VR Game Specialist with over 5 years of proven experience building standout games, engaging interactive apps, and stunning 3D visual content for clients worldwide.
I help startups, indie studios, and brands turn ideas into fully functional games, augmented reality apps, and virtual reality experiences for mobile, desktop, and leading headsets like Oculus Quest, HTC Vive, and Windows Mixed Reality.
Whether you need a hyper-casual mobile puzzle, multiplayer battle royale map, VR training simulation, or branded AR filter — I deliver polished results, clear communication, and clean, maintainable code.
🗝️ What I Do Best
✅ Unity Development: Complete game development — prototyping, C# programming, animation setup, performance optimization, and publishing on Google Play Store.
✅ 3D Modeling & Animation: Realistic models, texturing, rigging, and immersive animations for characters, props, and environments.
✅ Augmented Reality (AR): AR apps for Android & iOS with Vuforia, interactive Instagram filters with Spark AR, product try-ons, educational AR flashcards, and more.
✅ Virtual Reality (VR): Full-scale VR apps for training, simulations, and games — optimized for Oculus, HTC Vive, and Windows MR.
✅ Technical Art & Visual FX: Custom shaders (Shader Graph, HLSL), stylized effects, light VFX, lighting setups, and real-time rendering.
✅ Editor Tools & Pipelines: Build Unity Editor tools to boost your workflow, streamline asset pipelines, and optimize for mobile and standalone builds.
✅ QA & Optimization: Rigorous testing for functionality, performance, UX, and seamless cross-device operation.
🎮 Highlight Projects
• AR-Based Skate 3D Game: Built in Unity for Oculus 1 & 2 using Blender & C#.
• Rummy Kub 2D Game: Cross-platform for desktop, mobile, and web using Unity & React for iOS & Android.
• Crime Scene Detection 3D Game: 3D modeling & rigging with Blender, Unity, Visual Studio.
• Manialand VR: Web-based high-fidelity VR experience in Unity & React.
• JewelryAR App: Realistic AR jewelry try-on using Unity, MediaPipe, OpenCV & Python.
• Cut Throat - Dominoes, RummyKub7777, Word War Master, LTV Parking Pro — Games published on the Google Play Store.
🛠️ Tools I Master
Unity3D, 3Ds Max, Blender, After Effects, Photoshop, Spark AR, Vuforia, Visual Studio, AutoCAD, ETAP, Solidworks, DIALux, MATLAB, plus Python & AI/ML frameworks for smart game features.
✔️ How I Work
• Clear milestones, honest timelines, and smooth communication
• Clean, scalable code with version control
• Quick prototypes and iterative builds
• Thorough testing: functionality, UX, performance, security
• Reliable support & long-term collaboration
🔍 SEO Keywords
Unity Developer | Game Developer | AR Developer | VR Developer | Technical Artist | 3D Modeling | Augmented Reality | Virtual Reality | Metaverse Developer | Mobile Game Development | Oculus Quest | HTC Vive | Vuforia | Spark AR | Shader Graph | C# Developer | Multiplayer Games | Play Store Games
📌 Let’s Build Something Great
If you’re ready to launch an immersive experience that stands out and delivers results, let’s team up! Check out my portfolio at Funavry Portfolio.
💬 Send me a message — let’s make your next big idea a reality!
Associated with
Funavry Technologies
$35/hr
100%
Job Success
$100K+ earned
Available now
Offers consultations
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Full Stack Developer SaaS focused on turning complex product ideas into stable, scalable platforms
Recent Client Results:
✔️ launch SaaS products in 6-10 weeks
✔️ improve API performance by 30-45%
✔️ reduce manual operations by 40-60%
✔️ build platforms ready to support 10k+ users.
As a Full Stack Developer React Node and SaaS Developer I help startups and established businesses. I bring 16+ years in software development, 225+ delivered products and 9+ years of hands-on Node.js experience.
As a Certified Full Stack Developer React Node and Web Full Stack React Developer, I focus on business outcomes first: launching SaaS MVPs 30–40% faster, improving release stability, building scalable architecture, and reducing costly rework as products grow. My experience as a Full Stack React JS specialist allows me to deliver production-ready solutions with React.js, Node.js, Next.js, Nest.js, and modern JavaScript Developer workflows, supporting platforms with 10k+ users, 99.9% uptime targets, and integrations across APIs, payments, CRMs, and AI tools.
As a Backend Developer Nest.js with strong TypeScript Backend Development skills, I design maintainable server-side application architecture, secure APIs, and clean business logic for SaaS, internal tools, marketplaces, and custom platforms. As a Node js Developer, Nodejs Developer, and Nodejs Backend Developer, I use Node.js to simplify complex workflows, improve backend stability by 30–45%, and support products built on both SQL and NoSQL databases. My Typescript Nodejs background helps teams move 25–35% faster with modular services, readable code, and easier long-term maintenance. I also build advanced integrations with Stripe, third-party services, and node.js graphql solutions for scalable product ecosystems, including platforms with 10k+ users, 99.9% uptime targets, and 20+ API/payment/CRM integrations.
I’m a Full Stack Developer React Node with deep experience in scalable web application development across SaaS platforms, CRM systems, dashboards, admin panels, internal tools, and custom business products. My React js Node js work is focused on shipping fast, usable, and maintainable solutions that support real business goals.
As a React Developer and Full Stack Developer React Node, I build responsive, scalable interfaces using React, JavaScript, Node.js, and Next.js. My work as a React JS Developer and React JS / Next.js / NestJS Developer focuses on creating fast, user-friendly products that improve usability, support growth, and reduce friction across the customer journey. I also work as a React Native Developer ( Full Stack Developer SaaS ) when a product needs mobile-first extensions or companion app experiences aligned with the main platform.
As a Full stack AI SaaS developer, I help businesses with scalable SaaS Projects, Edtech Products with dashboards and payment flows, advanced e-commerce solution beyond CMS limits, Corporate Websites with strong backend logic, marketplace platforms with secure transactions, Authentication and Security with JWT-based access control, API Development and Integration, GraphDB, REST API, node.js graphql, CRM Development, Payment Gateways Stripe Paypal Liqpay, Database Management & Optimization and ongoing Deployment & Maintenance.
I also bring practical experience with PHP, Laravel, Python, Vue.js, Angular, React, Node.js, full stack developer supabase react, full stack react native spring boot, JavaScript, MySQL, WordPress, Tailwind CSS, Bootstrap, HTML, HTML5, CSS and CSS 3,
TypeScript, Redux, jQuery, Responsive Design, Web Design, PHP, MongoDB, Next.js python full stack developer, full stack developer ai, full stack developer react, full stack developer shopify
My work covers full stack node.js react for modern Web Application products, including custom API development and API Integration, while Git supports a clean and reliable delivery workflow. I also bring strong Web Design awareness, helping create interfaces that are not only functional, but also responsive, polished and user-friendly.
👉If you need a Full Stack Web Developer who can launch faster, improve performance, stabilize architecture, and build for long-term growth - let’s discuss your product.
Associated with
Malevich Studio
$300K+
earned
$50/hr
100%
Job Success
$400K+ earned
Available now
Offers consultations
Start of list.
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Most software projects don't fail because of technology.
They fail because nobody owns the entire process.
Founders are forced to manage developers. Developers wait for decisions. Priorities change weekly. Budgets grow. Deadlines slip. The product launches months later than expected-or never launches at all.
For the last 20 years, I've helped companies bridge that gap.
I'm a Technical Project Manager, and Full-Stack Architect who leads software delivery from idea to launch and beyond. I combine technical leadership, project management, product strategy, and hands-on engineering experience to help businesses build the right product, execute efficiently, and scale with confidence.
I've successfully delivered 474+ projects for startups, agencies, and established businesses across the United States, Europe, and Latin America while maintaining a 100% Job Success Score on Upwork and generating more than $400,000 in platform earnings.
I also lead Galindo Consulting Group, one of Upwork's longest-standing Top Rated Plus agencies, with:
• 4,100+ completed projects
• $5M+ earned on Upwork
• 461,000+ hours worked
• 100% Job Success Score
• Operating successfully since 2007
When you work with me, you're not hiring a task manager or another developer. You're hiring someone who takes responsibility for outcomes.
Recent Results
• Architected and launched NextBlock's Solana infrastructure, payment systems, and API platform from scratch, helping process over $250,000 in revenue within the first 60 days
• Built and scaled Interviewiz, an AI-powered interviewing platform supporting 10,000+ monthly interview sessions using OpenAI, FastAPI, Supabase, and modern cloud infrastructure
• Led development and delivery of SaaS platforms supporting tens of thousands of active users across AI, fintech, healthcare, blockchain, e-commerce, and marketplace industries
• Managed distributed engineering teams across multiple countries while maintaining predictable delivery schedules and product quality
How I Help
• Technical Project Management
• Product Roadmapping & Delivery Planning
• Fractional CTO Leadership
• Agile & Scrum Team Management
• Engineering Management
• Software Architecture & System Design
• MVP Planning & Execution
• SaaS Platform Development
• AI & LLM Product Integration
• E-commerce & Marketplace Platforms
• Mobile Application Delivery
• Team Scaling & Process Optimization
• Risk Assessment & Technical Due Diligence
Industries
• SaaS
• Artificial Intelligence
• Fintech
• Healthcare
• E-commerce
• Marketplaces
• Blockchain & Web3
• Logistics
• Professional Services
Core technologies: Next.js, React, Node.js, Python, PostgreSQL, Supabase, OpenAI, Claude, AWS, Stripe, Docker, and modern cloud infrastructure.
Clients typically hire me when:
• They need someone to lead technical execution from concept to launch
• Their project is falling behind schedule and needs experienced leadership
• Their engineering team lacks direction, process, or accountability
• They need a Fractional CTO before making a full-time executive hire
• They want technical decisions validated before investing heavily in development
• They need an experienced bridge between founders, stakeholders, and engineering teams
Engagement Types
Fractional CTO
Product strategy
Architecture reviews
Team leadership
Technical due diligence
Technical Project Management
Roadmapping
Sprint planning
Stakeholder management
Delivery oversight
AI & SaaS Architecture
LLM integration
Agentic workflows
SaaS platforms
Workflow automation
If you're building a product, scaling a platform, or trying to get a stalled project back on track, send me a message with your current stage, biggest challenge, and goals for the next 90 days.
I'll help you determine the fastest path forward and whether I'm the right fit for your project.
Associated with
Galindo Consulting Group
$5M+
earned
$25/hr
100%
Job Success
$20K+ earned
Available now
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I build production-ready AI systems RAG pipelines, AI agents, and LLM-powered apps , that turn messy data and manual processes into reliable, automated workflows. 21 projects delivered on Upwork with a 100% Job Success score.
Most AI projects look great in a demo and break in production. I focus on the opposite: systems that stay accurate, fast, and affordable once real users and real data hit them.
Here's what I help clients build:
• RAG systems : chatbots and Q&A tools that answer from your own documents, knowledge bases, and data, with proper retrieval and minimal hallucination
• AI agents & automation : multi-step agents that research, summarize, and take actions using LangChain and LangGraph
• LLM integration : connecting OpenAI, Anthropic Claude, and open-source models (Llama, Mistral) into your product or internal tools
• Optimization : fine-tuning, prompt engineering, and caching to push accuracy up and API costs down
My typical stack : Python, LangChain, LangGraph, LlamaIndex, FastAPI, vector databases (Pinecone, Chroma, FAISS), Hugging Face, Docker, and AWS/GCP/Azure.
I communicate clearly, scope honestly, and tell you when an AI solution is overkill versus when it's the right call. That's a big part of why my clients keep coming back.
A few recent results:
• Built a RAG chatbot over 500+ documents that cut support response time more than half.
• Reduced LLM API costs by 40% through prompt optimisation and caching.
• Shipped an AI agent that automated 10 tasks, saving the team 20 hours per week.
If you have an AI idea anything from a quick prototype to a full production system send me a message describing what you're trying to build.
I'll reply with an honest take on how I'd approach it, what it would realistically take, and whether it's worth doing.
$28/hr
100%
Job Success
$100K+ earned
Available now
Offers consultations
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🥇 Technical Lead at ServReality — Ranked Top 10 in AR/VR globally by Clutch!
🚀 With 15+ years in iOS, Android, and gaming, I bring full-cycle mobile and game development experience as a 💎 Mobile Solution Architect.
🎮 Senior Unity & Unreal AR/VR Developer with 12 years in immersive game creation — this isn’t just work, it’s passion.
🎯 I specialize in crafting AR/VR-powered games and mobile apps using Unity, Unreal, and Lumberyard to build immersive, interactive experiences.
Here’s what I bring to the table:
✅ Mobile App Dev: iOS (Objective-C, Swift, Xcode), Android (Java, Gradle, Android Studio)
✅ AR: ARKit, ARCore, Vuforia, Wikitude, HoloLens, Meta 2, AR.js, Moverio
✅ VR: SteamVR, Oculus, Cardboard, Windows MR, Optitrack, Dexmo
✅ Game Engines: Unity3D, Unreal Engine, Lumberyard
✅ Art: Modeling, Texturing, Visualization
✅ Core Features: Group chat, voice/video calls, file sharing, real-time messaging, backend implementation
✅ AI & ML integration
✅ UI/UX design & testing for cross-platform apps
In AR/VR, I work with tools like ARKit, ARCore, SteamVR, Oculus, and HoloLens to deliver engaging environments with features like gesture control, spatial mapping, haptics, and real-time rendering.
My goal is to combine technical depth with creative precision — transforming visions into standout digital experiences.
#AR #VR #MR #XR #GameDevelopment #MobileDevelopment #MobileApps #iOS #Android #Unity #Unreal #Lumberyard #ARKit #ARCore #Vuforia #Wikitude #HoloLens #Meta2 #Moverio #ARJS #SteamVR #Oculus #Cardboard #WindowsMixedReality #Optitrack #Dexmo #3DModeling #GameArt #Texturing #Visualization #RealtimeMessaging #VoiceChat #VideoCalling #FileSharing #AI #ArtificialIntelligence #MachineLearning #UIUX #BackendDev #GestureRecognition #SpatialComputing #CrossPlatform #MultiplayerVR #RoomScaleVR #ARGames #VRGames #InteractiveGameplay #ImmersiveExperiences #RealTimeRendering #GamePhysics #HapticFeedback #3DUX #VRUI #ARUI #VirtualStorytelling #AugmentedReality #VirtualReality #HeadMountedDisplays #SpatialMapping
⚡️ Updated portfolio on June 24, 2026
Associated with
ServReality
$400K+
earned