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$40/hr
100%
Job Success
$10K+ earned
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🚀 Over 14 years and 320+ shipped products, we've helped startups and scaling businesses turn ideas into fast, profitable digital platforms. Our team has delivered 180+ custom web applications, 60+ mobile apps, and 40+ AI-powered software systems, each engineered to perform from day one and scale without friction.
I lead a senior full stack developer team with deep roots in both frontend and backend engineering. We've driven results that speak for themselves: load times reduced by up to 73%, API response times cut from 1.8s to under 200ms, and clients growing revenue by 3-5× after launching platforms we built. Whether the project calls for a dedicated React developer, a WordPress developer, a mobile app developer, or a complete full stack developer team owning end-to-end delivery, we've executed at scale across every major industry.
E-commerce and growth systems are core to what we do. Our full stack Shopify builds have processed $2M+ in Year 1 GMV. Custom React Shopify frontends we've engineered improved client conversion rates by 38%. Full stack ecommerce platforms we've shipped now serve 50,000+ daily active users. Full stack SEO is baked into our engineering process from day one, server-side rendering via React Next.js, structured data, Core Web Vitals optimization, helping clients rank on Page 1 for 400+ competitive keywords within 6 months of launch. SEO React architecture isn't an afterthought in our workflow; it's a first-class engineering requirement built into every frontend system we deliver.
Our React developers architect scalable component libraries used across teams of 15+ engineers and consistently deliver UI scoring 90+ on Lighthouse performance audits. On mobile, we've shipped 60+ cross-platform React Native mobile applications with 800,000+ combined downloads and an average 4.7★ app store rating. Every React Native developer on our team works across the full product lifecycle, architecture, development, App Store submission, and post-launch iteration, using React Native Expo for fast, reliable iOS and Android deployment.
Our WordPress developer practice has produced 90+ websites, from editorial platforms handling 500,000+ monthly visitors to WooCommerce stores carrying 10,000+ SKUs. Every website that leaves our team is performance-tuned, SEO-ready, and built so non-technical editors can manage it without touching a line of code.
The full stack developer team I lead operates across the entire technology stack. On the frontend: React, React TypeScript, React Next.js, Vue.js, Webflow, Tailwind CSS, and Bootstrap.
On the backend: Python, FastAPI, Django, Node.js, Laravel, PHP, REST APIs, and GraphQL.
Our Python developer capability covers data pipelines processing 2M+ records daily and backend APIs handling 100,000+ requests per hour. Infrastructure runs on AWS, Firebase, and Supabase, with CI/CD pipelines that compress deployment time to under 8 minutes.
We've delivered software across 15+ verticals including AI platforms, fintech, healthcare, legal document automation, education LMS, HR software, social media products, automotive ERPs, manufacturing systems, and digital marketing platforms with Meta, Google, and TikTok integrations.
Our AI-powered platforms have reduced client manual review time by 65%, improved lead qualification accuracy by 44%, and automated 1,200+ repetitive operational tasks per month.
The engagement model flexes to fit what you actually need. A solo React developer who owns frontend delivery end-to-end and ships a complete system in 6 weeks. A senior web developer who steps into an existing codebase, stabilizes releases, and reduces critical bug rates by 80% within 90 days, something we've done for 25+ companies. A full stack developer team scaling from 2 to 14 engineers mid-project without missing a single deadline. We've operated in every configuration and delivered in all of them.
Whatever the scope - a new website, a SaaS product, a scalable React frontend, a CMS platform, cross-platform mobile apps, or a complete backend system, my team has the full stack developer depth, the React developer precision, the web developer range, and the product engineering experience to build it right the first time.
14 years. 320+ products. Millions of users served. Let's build yours.
Associated with
EVNE Developers - Outcome-Based Delivery for Startups
$600K+
earned
$10/hr
100%
Job Success
$1K+ earned
Start of list.
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"I'm an experienced backend & automation developer who builds fast, scalable, zero-maintenance systems.What I actually build and ship every week: Go (Golang) – high-performance APIs, microservices, CLI tools, concurrent workers
Node.js – Express/Fastify/NestJS, real-time apps, webhooks, serverless functions
Python & Django – full-featured backends, admin panels, REST/GraphQL APIs
Databases – PostgreSQL, MySQL, MongoDB, DynamoDB, Redis
Web scraping & data extraction – Playwright, Puppeteer, Scrapy, Selenium, rotating proxies, anti-bot bypass — clean and reliable
Microservices architecture – Docker, Docker Compose, event-driven, AWS Lambda + API Gateway, Kubernetes-ready
Automation with n8n – self-hosted or cloud, custom nodes, bulletproof workflows between all your apps
Smart bots & agents – GPT-4o, Claude 3.5, Gemini, Grok, Llama 3 via API → chatbots, auto-responders, content generators, decision agents
Infra that never breaks – Linux, Bash, systemd, PM2, Caddy/Nginx, Terraform when needed
Bottom line: I build rock-solid backends and microservices (Go/Node/Django), store data wherever it makes sense (including DynamoDB), scrape anything legally and reliably, automate everything with n8n, and supercharge it all with the best AI APIs.
Amanuel E.
has worked
.
$18/hr
98%
Job Success
$50K+ earned
Available now
Start of list.
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Senior Full Stack Developer with 8+ years of experience building scalable SaaS platforms, AI-powered applications, enterprise dashboards, and high-performance web solutions using React.js, Next.js, Node.js, and Python.
I help startups and businesses develop secure, scalable, and production ready web applications with clean architecture, optimized performance, and seamless API integrations.
I specialize in developing scalable SaaS platforms, AI-powered applications, enterprise web systems, and modern full stack solutions that help businesses automate workflows, improve operational efficiency, and scale their digital products.
My expertise includes:
- React.js & Next.js Development
- Node.js & Express.js Backend Systems
- Python Development & Automation
- SaaS Platform Development
- OpenAI / LLM / AI Integrations
- REST API & Third-Party Integrations
- Dashboard & Admin Panel Development
- Authentication & Secure Systems
- Cloud & Database Architecture
- Performance Optimization
- Real Time Applications
I focus on building production ready applications with clean, maintainable architecture, responsive UI/UX, scalable backend systems, and optimized performance to ensure long-term business growth and reliability.
I have worked on SaaS products, AI automation systems, enterprise dashboards, CRM platforms, business management systems, eCommerce solutions, workflow automation platforms, and custom web applications for startups and growing businesses.
I also work extensively with AI & LLM integrations, including OpenAI APIs, AI chatbots, automation workflows, intelligent assistants, AI-powered search, and custom AI business solutions.
If you're looking for a reliable full stack developer who understands both technical architecture and business requirements, let’s discuss how I can help build and scale your product successfully.
Associated with
Narola Infotech Solutions LLP
$10M+
earned
$20/hr
97%
Job Success
$30K+ earned
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7+ Years of Experience | Top Rated Plus
Most businesses don't struggle because of a lack of ideas—they struggle because their systems can't keep up. Slow development cycles, brittle architectures, disconnected tools, and the inability to utilize AI effectively often result in lost opportunities, operational inefficiencies, and increased costs.
I help businesses build scalable backend systems and AI-powered applications that are designed for long-term growth.
Over the past 7+ years, I have worked with startups, SaaS companies, agencies, and enterprise teams to design, develop, and maintain production-grade applications using Python and Django. As AI adoption accelerated, I expanded my expertise into Generative AI and LLM-powered systems, helping companies integrate intelligent capabilities into existing products and build AI-native applications from the ground up.
I bring a unique combination of strong software engineering fundamentals and deep understanding of modern AI technologies.
I can help you with:
=================
• Building robust SaaS applications using Django and Django REST Framework
• Designing scalable APIs using FastAPI and modern backend architectures
• Developing secure, maintainable, and high-performance Python applications
• Architecting multi-tenant SaaS platforms and enterprise systems
• Database design, optimization, and performance tuning
• Authentication, authorization, RBAC, JWT, OAuth, and SSO implementations
• Background processing using Celery, Redis, and asynchronous task execution
• Third-party integrations including payment gateways, CRMs, ERPs, and external services
• Cloud deployment, CI/CD pipelines, monitoring, and infrastructure automation
In addition to backend engineering, I specialize in integrating AI capabilities into real-world products.
My AI expertise includes:
=====================
• Building LLM-powered applications using OpenAI, Claude, Gemini, Llama, DeepSeek, Mistral, and Hugging Face
• Designing Retrieval-Augmented Generation (RAG) systems with vector databases and semantic search
• Developing AI copilots and domain-specific assistants
• Building multi-agent systems using LangGraph, CrewAI, OpenAI Agents SDK, AutoGen, and PydanticAI
• Implementing tool calling, structured outputs, and agent orchestration workflows
• Developing document intelligence solutions involving OCR, extraction, classification, and validation
• Creating conversational AI solutions for customer support, internal operations, and workflow automation
• Integrating AI into existing SaaS platforms without disrupting current business processes
Technology Stack
===========
Backend & APIs
Python, Django, Django REST Framework, FastAPI, Flask, Node.js
AI & LLMs
OpenAI, Claude, Gemini, Llama, DeepSeek, Mistral, Hugging Face, LangChain, LangGraph, CrewAI, OpenAI Agents SDK, AutoGen, PydanticAI, MCP
RAG & Vector Databases
Pinecone, Qdrant, Weaviate, Chroma, pgvector, Embeddings, Hybrid Search, Reranking
Databases & Messaging
PostgreSQL, MySQL, MongoDB, Redis, RabbitMQ
Cloud & DevOps
AWS, Docker, Kubernetes, GitHub Actions, CI/CD, Monitoring, Observability
I focus on building solutions that are secure, scalable, maintainable, and production-ready. Whether it's a high-performance Django backend, an AI-powered SaaS platform, or an intelligent system powered by LLMs, my priority is delivering technology that creates measurable business value rather than experimental prototypes.
If you're looking for an engineer who combines deep Python expertise with practical experience shipping AI systems into production, I'd be happy to help bring your vision to life.
Ranjeet S.
has worked
.
Associated with
SoftProdigy
$10M+
earned
$20/hr
100%
Job Success
$1K+ earned
Available now
Start of list.
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Hello there! I’m a passionate Full-Stack Developer with over 10 years of experience creating modern, responsive, and scalable web applications. I specialize in both front-end and back-end development, delivering solutions that not only look great but also work seamlessly.
✮ Available 18 Hours a Day for Your Project Needs.
✮ Expert Full Stack Developer with a Focus on Modern Web Technologies.
✮ Fast 4-Hour Response Time & Always Client-Centered!
✮ Unlimited Revisions to Perfectly Bring Your Vision to Life.
What I’m Great At:
Front-End Development: Crafting stunning user interfaces with Angular, React.js, Next.js, and Tailwind CSS.
Back-End Development: Building reliable APIs and back-end systems using Django, Flask, and FastAPI.
DevOps Know-How: Deploying apps with Docker, Kubernetes, and CI/CD pipelines (GitLab CI, Jenkins).
CMS Customization: Customizing Wagtail and WordPress for smooth content management.
API Integration: Creating and connecting RESTful APIs to ensure everything runs smoothly.
Database Management: Designing and optimizing databases with PostgreSQL, MySQL, and SQLite.
How I can Help You:
I can help you bring your ideas to life—whether it’s a sleek, responsive website, a powerful web app, or a custom CMS tailored to your needs. I’m also great at deploying scalable solutions and optimizing websites for speed and performance.
Why Choose Me?
I prioritize collaboration and clear communication, ensuring you’re always in the loop. I care about delivering top-quality work on time and making sure the end product exceeds your expectations. Let’s work together to create something amazing!
$25/hr
100%
Job Success
$70K+ earned
Available now
Offers consultations
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🏅 Top Rated Plus | 100% Job Success | 🚀 7+ years shipping production software
Your team is burning $50K–$500K a year on work AI should already be doing. I build the systems that reclaim it: I pinpoint the waste, automate it, and ship it to production. Not prototypes, not demos, real systems running 24/7.
I'm an AI Developer and AI-powered Full Stack Engineer with a strong machine learning foundation, and I lead a team that takes extreme ownership of what we ship. As an AI Developer, I take projects from idea to production: AI architecture, AI agents, agentic workflows, and RAG pipelines, grounded in real machine learning rather than wrappers. As a Full Stack and Web Developer, I build the product around them in React, Node, and Python. And as an AWS architect, I deploy and harden everything with observability, security, and cost optimization, so you get an AI system that ships fast and runs reliably in production.
🐾 Pet Health Care System — AI-native OS for vet hospitals; unifies scheduling, records, billing, imaging across 6–12 tools. Targets 40% of a vet's day lost to paperwork, $50K–$100K/yr no-show losses, 8–12% of procedures never invoiced. Built with Next.js, NestJS, PostgreSQL, Python AI, AWS.
🏨 Hotelly — All-in-one hotel ops platform: CRM, billing, tasks + Apple TV (tvOS) in-room entertainment. 70–95% less manual reset effort, 50–80% faster provisioning, 60–90% less admin time. Built with React, React Native, Node.js, PostgreSQL, AWS by AI Developers.
📄 DocuPulse — AI document intelligence inside Excel for finance & compliance teams. Processing 5–10 min → under 1 sec, 94% cost reduction, 88–99% accuracy. Built with React, Node, ElasticSearch, AWS.
🪟 Fenestra — AI order intelligence turning WhatsApp/emails into error-free POs in under 60 sec across 25,000+ SKUs. Live inventory checks, accurate orders before dispatch. Built with Next.js, NestJS, PostgreSQL, LangChain, Claude.
🛒 Smart Shop AI — Ecommerce intelligence unifying Shopify, Google Ads & Meta with a conversational AI analyst. Real-time insights, anomaly alerts, campaign recommendations. Built with NestJS, React, PostgreSQL, LangChain.
✅ AI Agents & Agentic AI: As an AI Developer and agentic AI developer, I design AI agents and multi-agent systems that run agentic workflows across LangGraph, CrewAI, n8n, and Zapier, designed to scale operations without adding headcount.
✅ AI Voice & AI Chatbots: I build voice AI agents and conversational AI on the OpenAI Realtime API, LiveKit, ElevenLabs, Deepgram, and Whisper, plus WhatsApp, Telegram, and web chatbots wired to real business logic.
✅ RAG & LLM Engineering: I build hallucination-resistant RAG pipelines in Python over Pinecone, Weaviate, Qdrant, ChromaDB, LanceDB, and Amazon OpenSearch, using hybrid search, re-ranking, chunking, and embeddings.
✅ AI Orchestration: I orchestrate LLM applications in Python with LangChain, LangGraph, and LlamaIndex, connecting the OpenAI API, Anthropic Claude (Sonnet, Opus, Haiku), AWS Bedrock, and Vertex AI through MCP servers, function calling, and structured outputs.
✅ Machine Learning & Data Science: As a machine learning engineer working alongside data scientists, I take models across the full lifecycle, from data pipelines and feature engineering to training, evaluation, and deployment.
✅ Document Intelligence: I turn documents into answers with PDF parsing, OCR, and document Q&A over knowledge bases and ERP integrations.
✅ Prompt Engineering: I engineer reliable model behavior through system prompt architecture, chain-of-thought, and prompt chaining, then harden it with prompt optimization, evals, and guardrails.
✅ Generative AI Models: I work across GPT-4o, GPT-4 Turbo, o1, and o3, Claude Sonnet, Opus, and Haiku, Gemini 1.5 and 2.0, LLaMA, Mistral, and Whisper, picking the right model for each job.
✅ Full Stack & Web Development: As a full stack developer, web developer, and Python developer, I build full stack apps with React, Next.js, TypeScript, and Tailwind CSS on the front end, and Node.js, NestJS, Express, and Python (FastAPI, Django, Flask) on the back end, including work as an AI website developer and app developer building AI web apps around real product logic.
✅ AWS Architecture & Cloud: As an AWS cloud architect and AWS solutions architect, I handle AWS architecture end to end, deploying on AWS using Lambda, EC2, ECS, EKS, Fargate, S3, RDS, Aurora, DynamoDB, SQS, SNS, EventBridge, CloudFront, API Gateway, VPC, IAM, KMS, WAF, and Secrets Manager. AWS Certified Cloud Practitioner.
✅ No-Code & Workflow Automation: As an Airtable developer, I connect tools like Airtable, n8n, Zapier, and Make into automated workflows that move data and trigger actions automatically.
✅ Integrations: I connect products to the tools businesses already run, including Stripe, HubSpot, Salesforce, NetSuite, Plaid, Yodlee, HL7/FHIR, Slack, MS Teams, and WebRTC.
📩 Send me your project brief. I'll reply within 2 hours with a concrete action plan.
Hassaan E.
has worked
.
Associated with
DiveScale
$10K+
earned
$100/hr
100%
Job Success
$100K+ earned
Available now
Start of list.
End of list.
I am an AI Systems Engineer and Senior Python Backend Developer with a strong background in Artificial Intelligence and production-grade system architecture. I hold a Master’s degree in AI and specialize in building scalable AI-driven platforms that combine machine learning, backend engineering, and real-world business logic.
My experience goes beyond training models — I design and deploy complete AI systems. I have built predictive analytics platforms processing millions of data points, integrated ML inference pipelines into production APIs, and architected multi-tenant SaaS backends using FastAPI and Django.
I specialize in:
• Designing scalable Python backend architectures
• Deploying ML models into secure production environments
• Building asynchronous pipelines for AI workloads
• Feature engineering and large-scale data preprocessing
• Financial modeling (ROI, IRR, NPV forecasting systems)
• AI-powered analytics platforms
• Multi-tenant SaaS system design
I have hands-on experience with model training and deployment using TensorFlow, scikit-learn, and modern ML workflows, and I’ve implemented NLP systems for sentiment analysis and structured intelligence extraction. I’ve also built recommendation systems and computer vision pipelines, focusing on real-world performance and production reliability — not just experimental accuracy.
In addition to AI work, I am highly experienced in backend engineering:
• RESTful API design (FastAPI, Django)
• PostgreSQL schema design and optimization
• Asynchronous programming (asyncio, Celery)
• Cloud deployments (GCP / AWS)
• Dockerized microservices
• CI/CD pipelines
• Role-based access control and secure API systems
My approach is analytical, structured, and business-oriented. I focus on building AI systems that are measurable, maintainable, and scalable.
If you are looking for someone who can design, implement, and deploy intelligent systems — not just build models — I would be happy to collaborate.
Bright B.
has worked
.
$15/hr
100%
Job Success
$50K+ earned
Start of list.
End of list.
Hi Guys,
I am Dharmik Godhani. A passionate senior full-stack developer having 8+ years of experience and providing technical services:
✨ COMPLETED JOB: 30+
✨ EXPERIENCE: 8+ Years
✨ SKILLS: Web & Application Development
🚩What can you expect from my web development services⁉️
✔ Expertise in building robust and dynamic web applications from scratch.
✔ Seamless integration of the latest technologies to create feature-rich apps.
✔ Focus on optimizing website speed without compromising on layout and functionalities.
✔ Ensuring responsive design for smooth user experiences across all devices.
✔ Implementing cutting-edge security measures to safeguard your data.
✔ Thorough testing and bug fixing to deliver flawless results.
⭐I am expertise in many programming skills ⭐
Web Frontend Technologies
➖➖➖➖
🛠 ReactJS/ NextJS/ Redux/ Redux Saga/ Hooks
🛠 Angular8/11/13 / Ionic Expert / NgRX ( State Management ) / GraphQL ( Apollo Client )
🛠 HTML5/CSS3/JavaScript/BOOTSTRAP 5/TypeScript/SCSS/LESS/Flex Box/
🛠 MUI/ material-UI / Ant Design ( NG ZORRO ) / Tailwind CSS / SemanticUI
🛠 Theme Customization
Backend Technologies
➖➖➖➖
🛠 PHP [with the framework: Laravel]
🛠 Python [with Django MVC/ DRF/ Flask/ Fast API/ Bottle]
🛠 JS [with the framework: Node.JS/Nest.JS]
Database Tools
➖➖➖➖
🛠 SQL : MySQL/ PostgreSQL
🛠 NoSQL : MongoDB
🛠 Redis
🛠 Dynamic : Firebase / Firestore
🛠 SQLite DB
Web Hosting
➖➖➖➖
🛠 Azure / AWS Web Hosting
🛠 Comfortable with setting up VPS from scratch
❤️Why a Skilled Web Developer Matters?❤️
1. A proficient developer ensures your website's functionality and appearance are top-notch.
2. Web applications built with expertise attract more users and potential customers.
3. Fast-loading websites lead to better search engine rankings and increased user satisfaction.
♛ I will make your website so best that your visitors will say 😃"WOW!".😃
📞 LET'S TALK ABOUT YOUR PROJECT 📞
Thanks,
Dharmik Godhani
Godhani D.
has worked
.
$25/hr
100%
Job Success
$80K+ earned
Available now
Start of list.
End of list.
Need an AI SaaS platform that scales without rewrites? With 7+ years as a Full Stack AI Developer, I've delivered systems supporting 100,000+ property listings and cut data sync time by 60% for startups and growing businesses. I build production-ready AI apps, SaaS platforms, and automation systems that are built for real users.
🚀 HOW I CAN HELP YOU
AI SaaS DEVELOPMENT
Launch scalable AI-powered SaaS products that turn ideas into revenue and support real users from day one. I’ve delivered SaaS systems supporting 100,000+ property listings and built production-ready platforms that reduce the risk of costly rewrites later.
LLM INTEGRATION AND AI AGENTS
Add AI features that automate work, improve response times, and create measurable business value. I’ve built OpenAI, Claude, and Gemini integrations, plus RAG systems and autonomous workflows that reduced manual operations from hours to minutes.
FULL STACK SAAS DEVELOPMENT
Build web applications that are fast, scalable, and ready to grow with your business. My work with React, Next.js, Node.js, Python, and PostgreSQL has helped teams improve performance and support platforms used across healthcare, real estate, and enterprise workflows.
API DEVELOPMENT AND SYSTEM INTEGRATION
Connect your product to third-party tools and internal systems without slowing down your platform. I’ve improved data synchronization speed by 60% and built API-driven services with retry logic, logging, and error handling for long-term stability.
CLOUD DEPLOYMENT AND BACKEND SCALING
Protect your application from bottlenecks with infrastructure that can handle growth. I use AWS, Docker, CI/CD, and monitoring setups to keep systems stable, reduce downtime, and support smooth releases as usage increases.
🏆 RESULTS
"Ali is a pro's pro. He is extremely knowledgeable, helpful, and a great communicator. He was able to work through some tough challenges and deliver successfully."
– Chad M., Client
"Ali has been great with my Python and Node.js project. He was always available, and I would recommend anyone looking for a developer with high quality results and great communication."
– Ali Z., Client
"Ali was a very skilled Python developer that was very helpful in making our application more stable and usable. I would not hesitate to use Ali again in the future for Python projects."
– Matt D., Client
🎖 Advanced Python Engineering for AI and SaaS Applications
🎖 AI-Powered Application Development and Automation
🏅 7+ years building full-stack SaaS and AI systems
See full case studies in my portfolio below.
✉️ 𝗠𝗘𝗦𝗦𝗔𝗚𝗘 𝗠𝗘 𝗢𝗡 𝗨𝗣𝗪𝗢𝗥𝗞
Have an AI SaaS, MVP, or automation project in mind? Message me on Upwork and I will review your requirements, then recommend the fastest and most scalable path forward.
I typically respond within 4 hours and can support urgent projects when needed.
𝗛𝗼𝘄 𝗜 𝗪𝗼𝗿𝗸
I build in React, Next.js, and TypeScript, then connect the backend with Node.js, FastAPI, and PostgreSQL for reliable SaaS workflows. I use AWS and Docker to ship stable deployments, and I rely on GitHub Actions and Redis to keep releases smooth and performance consistent. For AI features, I integrate OpenAI and Claude into products that solve real business problems.
I build AI app development and SaaS development products with full-stack development, Python, and React, then deploy them on AWS with PostgreSQL and Docker.
Ali R.
has worked
.
$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.
I am a Full Stack Developer, Mobile App Developer, and SaaS Developer building production-ready software across mobile and web. As a Python Full Stack Developer and Full Stack Developer with React and Node.js, I work across the entire stack - from React Native and Flutter mobile apps to Python, Node.js, and Laravel backends. As a Software Developer and Senior Web Developer, I bring a backend-first mindset to every engagement, with deep attention to scalability, SaaS Development architecture, and long-term maintainability.
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 also support Laravel and PHP-based ecosystems when projects require it. As a DevOps-minded engineer and React Native Developer building mobile-connected SaaS platforms, 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 end to end
- 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 React 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 on Upwork.
Denys K.
has worked
.
Associated with
🔺 Jett Develops | Full-Cycle Design and Development Company, $250M Raised by Clients
$500K+
earned