Talent badge filter
Skills filter
Select talent location
Select talent time zones
$35/hr
100%
Job Success
$50K+ earned
Start of list.
End of list.
I am a web developer with 10+ years of experience and a Master's degree in Software Engineering.
I specialize in building custom web calculators, forms, and interactive web applications that help businesses generate leads, automate calculations, and improve user engagement.
I have worked on a wide range of projects, from simple calculators to complex logic-based tools with API integrations, dynamic data processing, and CRM connections.
What I can do for you:
Build custom web calculators (finance, pricing, ROI, etc.)
Create multi-step forms and quizzes with logic
Integrate calculators with APIs, Google Sheets, or CRMs
Embed solutions into any website
Optimize performance and user experience
Tech stack:
JavaScript, jQuery
PHP, MySQL
HTML5, CSS3
AJAX
WordPress, OpenCart
Yii2
I focus on clean, reliable solutions and clear communication. Most of my projects are delivered as ready-to-use tools that can be easily integrated into your website.
Kostiantyn R.
has worked
.
$27/hr
100%
Job Success
$800K+ earned
Available now
Offers consultations
Start of list.
End of list.
⭐⭐⭐⭐⭐ on 𝟭𝟵𝟬𝟬+ 𝗨𝗽𝘄𝗼𝗿𝗸 𝗣𝗿𝗼𝗷𝗲𝗰𝘁𝘀
🏅 𝟮𝟳𝟬𝟬𝟬+ 𝗨𝗽𝘄𝗼𝗿𝗸 𝗛𝗼𝘂𝗿𝘀 𝗘𝘅𝗽𝗲𝗿𝗶𝗲𝗻𝗰𝗲
💯 Less than 𝟭 𝗛𝗼𝘂𝗿 𝗥𝗲𝘀𝗽𝗼𝗻𝘀𝗲 𝘁𝗶𝗺𝗲
⌚ Available 𝟭𝟱 𝗵𝗼𝘂𝗿𝘀 𝗮 𝗱𝗮𝘆
🥇 Top 1% of Talent on 𝗨𝗽𝘄𝗼𝗿𝗸
Specializing in ✅ Custom WordPress ✅ Custom WooCommerce ✅ React.js/Next.js & frameworks ✅ MERN Stack ✅ Front-end Development ✅ React Native Development for Hybrid Mobile Apps ✅ API Integrations ✅ Quiz/Forms & Calculators Development ✅ AI Agentic Integration
I am your gateway to turning your digital dreams into captivating reality with acute focus to increase your business value. Equipped with a diverse set of skills below:
𝗧𝗼𝗼𝗹𝘀 & 𝗧𝗲𝗰𝗵𝗻𝗼𝗹𝗼𝗴𝗶𝗲𝘀:-
✅ 𝗖𝗠𝗦 𝗣𝗹𝗮𝘁𝗳𝗼𝗿𝗺𝘀: WordPress, Wix Studio, Shopify, Squarespace, Webflow, Craft CMS, HubSpot
✅ 𝗪𝗼𝗿𝗱𝗣𝗿𝗲𝘀𝘀 𝗕𝘂𝗶𝗹𝗱𝗲𝗿𝘀: Elementor, Gutenberg, ACF Pro, Thrive, Oxygen, Beaver Builder, WPBakery
✅ 𝗟𝗮𝗻𝗱𝗶𝗻𝗴 𝗣𝗮𝗴𝗲 𝗧𝗼𝗼𝗹𝘀: Leadpages, Unbounce, Instapages, Zapier, ClickFunnels, GoHighLevel
✅ 𝗪𝗼𝗿𝗱𝗣𝗿𝗲𝘀𝘀 𝗣𝗹𝘂𝗴𝗶𝗻𝘀: Gravity Forms, Fluent Forms, WPForms, WPML, Weglot, WooCommerce, Yoast SEO, RankMath, WP Rocket, LiteSpeed Cache
✅ 𝗧𝗵𝗲𝗺𝗲𝘀: Avada, Astra, Salient, BeTheme, Flatsome, Uncode, Bridge, X Theme, Enfold, Jupiter, Genesis, Ocean WP, GeneratePress, Kadence
✅ 𝗗𝗲𝘀𝗶𝗴𝗻 𝗧𝗼𝗼𝗹𝘀: Figma, Adobe XD, Sketch, Photoshop, Illustrator, InVision, Canva
✅ 𝗙𝗿𝗼𝗻𝘁-𝗲𝗻𝗱 𝗧𝗲𝗰𝗵: HTML, CSS, JavaScript
✅ 𝗝𝗮𝘃𝗮𝘀𝗰𝗿𝗶𝗽𝘁 𝗙𝗿𝗮𝗺𝗲𝘄𝗼𝗿𝗸𝘀: React, Vue, Next, Node
✅ 𝗘𝗰𝗼𝗺𝗺𝗲𝗿𝗰𝗲 𝗣𝗹𝗮𝘁𝗳𝗼𝗿𝗺𝘀: Shopify, WooCommerce, BigCommerce, PrestaShop, OpenCart
✅ 𝗠𝘂𝗹𝘁𝗶-𝗹𝗶𝗻𝗴𝘂𝗮𝗹 𝗧𝗼𝗼𝗹𝘀: WPML, Polylang, GTranslate, Weglot
✅ 𝗦𝗘𝗢 & 𝗠𝗮𝗿𝗸𝗲𝘁𝗶𝗻𝗴: On-Page SEO, Technical SEO (Core Web Vitals, Schema), Off-Page SEO, Content Marketing, Conversion Rate Optimization (CRO)
✅ 𝗪𝗲𝗯𝘀𝗶𝘁𝗲 𝗠𝗮𝗶𝗻𝘁𝗲𝗻𝗮𝗻𝗰𝗲: Proactive theme/plugin/CMS updates, Security Hardening, Speed Optimization, Website Monitoring
✅ 𝗔𝗜 𝗦𝗲𝗿𝘃𝗶𝗰𝗲𝘀: AI Chatbot Integration (ChatGPT), AI Content Writing, AI Image Generation (MidJourney, Stable Diffusion), AI SEO Optimization (SurferSEO), AI Workflow Automation (Zapier AI, Notion AI), AI Presentation Tools (Tome, Gamma)
🚀 𝗠𝘆 𝗠𝗮𝗴𝗶𝗰𝗮𝗹 𝗧𝗼𝗼𝗹𝗸𝗶𝘁 𝗼𝗳 𝗘𝘅𝗽𝗲𝗿𝘁𝗶𝘀𝗲: 🚀
✅ 𝗖𝘂𝘀𝘁𝗼𝗺 𝗪𝗼𝗿𝗱𝗣𝗿𝗲𝘀𝘀: From captivating eCommerce solutions to engaging blog platforms, I'll build a dynamic digital hub that attracts, engages, and converts visitors.
✅ 𝗖𝘂𝘀𝘁𝗼𝗺 𝗪𝗼𝗼𝗖𝗼𝗺𝗺𝗲𝗿𝗰𝗲: From intuitive product listings to seamless checkout processes, I'll create a seamless shopping experience that maximizes revenue and customer satisfaction.
✅ 𝗥𝗲𝗮𝗰𝘁.𝗷𝘀/𝗡𝗲𝘅𝘁.𝗷𝘀 & 𝗙𝗿𝗮𝗺𝗲𝘄𝗼𝗿𝗸𝘀: Whether you require dynamic single-page applications or complex enterprise solutions, I'll deliver cutting-edge solutions that drive user engagement and business growth.
✅ 𝗠𝗘𝗥𝗡 𝗦𝘁𝗮𝗰𝗸: Whether you need a data-driven application or a real-time collaboration platform, I'll create solutions that streamline processes and drive innovation.
✅ 𝗙𝗿𝗼𝗻𝘁-𝗲𝗻𝗱 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁: I'll craft pixel-perfect designs that adhere to the latest web standards, ensuring seamless user interactions and enhanced brand perception.
✅ 𝗥𝗲𝗮𝗰𝘁 𝗡𝗮𝘁𝗶𝘃𝗲 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁 𝗳𝗼𝗿 𝗛𝘆𝗯𝗿𝗶𝗱 𝗠𝗼𝗯𝗶𝗹𝗲 𝗔𝗽𝗽𝘀: I'll develop cross-platform applications that reach a wider audience, expanding your brand reach and fostering customer engagement across devices.
✅ 𝗔𝗣𝗜 𝗜𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻𝘀: Whether you need to integrate third-party services or connect existing systems, I'll ensure seamless communication and streamlined operations.
✅ 𝗤𝘂𝗶𝘇/𝗙𝗼𝗿𝗺𝘀 & 𝗖𝗮𝗹𝗰𝘂𝗹𝗮𝘁𝗼𝗿𝘀 𝗗𝗲𝘃𝗲𝗹𝗼𝗽𝗺𝗲𝗻𝘁: I'll design and develop engaging user interfaces that collect valuable insights, empowering you to make informed decisions and enhance customer experiences.
✅ AI 𝗜𝗻𝘁𝗲𝗴𝗿𝗮𝘁𝗶𝗼𝗻: I'll integrate ChatGPT seamlessly into your existing systems, enabling natural language processing capabilities that enhance customer support, generate creative content, and personalize user experiences.
Ready to bring your digital dreams to life? Don't settle for the ordinary; choose extraordinary. Invite me to be part of your success story on Upwork, and let's create digital magic together!
Humair Ali K.
has worked
.
$49/hr
100%
Job Success
$100K+ earned
Available now
Start of list.
End of list.
I help startups and growth-stage companies design, build, and scale AI-native software products — from early MVPs to production-grade agentic systems.
My focus is modern AI infrastructure, compound AI systems, and scalable product engineering across web, backend, cloud, and multimodal workflows.
Core Expertise
• AI Systems Engineering
* Multi-agent and compound AI systems
* Agent orchestration, tool-use pipelines, and autonomous workflows
* Model Context Protocol (MCP) integrations and AI tool ecosystems
* Skills-based agent architectures and dynamic capability routing
* Long-context memory systems and persistent agent state management
* Structured generation pipelines and deterministic AI workflows
• LLM Infrastructure & Reliability
* LLM observability, tracing, monitoring, and debugging
* LLM evaluations (evals), benchmarking, and regression testing
* Prompt engineering systems and model routing strategies
* Inference optimization, caching, latency reduction, and cost control
* Open-source model deployment and fine-tuning
* Hybrid architectures combining frontier and local models
• AI Product Development
* AI copilots, research agents, and workflow automation
* Enterprise knowledge systems and retrieval pipelines
* Voice, OCR, multimodal, and document intelligence platforms
* Recommendation engines, semantic search, and reasoning systems
• Full-Stack Engineering
* React, Next.js, TypeScript, Node.js, Python
* Real-time applications, APIs, SaaS platforms, and internal tooling
* Scalable backend systems and distributed architectures
• Cloud & Infrastructure
* AWS, GCP, Azure
* Kubernetes, Docker, serverless infrastructure, CI/CD
* GPU orchestration and scalable AI deployment pipelines
* Event-driven and microservices architectures
• Data & Knowledge Systems
* PostgreSQL, MongoDB, vector databases, graph databases
* Knowledge graphs and semantic indexing systems
* Data pipelines, ETL workflows, and analytics infrastructure
• Security, Governance & Enterprise Readiness
* Secure AI system design and access control
* SOC 2 and ISO 27001–aligned infrastructure and engineering practices
* HIPAA-aware healthcare AI systems and sensitive data workflows
* AI governance, auditability, observability, and enterprise deployment readiness
What I Bring
• Founder-level ownership and product thinking
• Strong execution across both strategy and implementation
• Ability to move rapidly from concept → MVP → scalable platform
• Experience building AI systems that operate reliably in production
• Clear communication with technical and non-technical stakeholders
Best Fit
• Founders building AI-native products
• Startups needing a technical co-founder or founding engineer
• Companies integrating AI into core workflows or operations
• Teams needing senior technical leadership for modern AI systems
Available for:
CTO roles, technical co-founder opportunities, AI systems architecture, agentic workflow development, and full-stack engineering leadership.
If you're building ambitious AI products or infrastructure, let's talk.
$55/hr
100%
Job Success
$7K+ earned
Offers consultations
Start of list.
End of list.
I help startups, SMEs, and operationally complex businesses modernize how they run — through AI automation, intelligent workflows, and engineered systems built for scale.
My focus is operational transformation: replacing manual, fragmented processes with integrated, AI-driven systems that compound efficiency over time. I work with founders, operators, and agency leaders who need execution that thinks beyond code — combining engineering depth with a clear understanding of how businesses actually function.
Where I focus:
— AI Workflow Automation & Business Process Automation
Designing AI-powered automations across CRMs, internal tools, and operational stacks. Built with n8n, Make, Zapier, and custom Node/Python services. Outcomes typically measured in hours reclaimed per week and manual errors eliminated.
— AI Agents, LLM Integrations & Intelligent Systems
Production-grade AI agents and integrations — RAG pipelines, tool-use, retrieval, evaluation, and guardrails. Built on OpenAI, Anthropic Claude, LangChain, and vector databases. Architected to behave reliably, not just demo well.
— Internal Tools, Dashboards & Operational Software
Custom admin panels, operational dashboards, internal CRMs, and team-facing systems that consolidate fragmented SaaS stacks into one well-engineered platform.
— Modern Full-Stack Engineering
Production web applications and SaaS systems engineered for scalability and long-term maintainability. Next.js, React, Node, Python, TypeScript, PostgreSQL, Supabase, AWS.
How I work:
Every engagement starts with a short discovery, a clearly scoped approach, and defined outcomes — not a feature list. I work in structured phases with regular checkpoints, deliver documentation as part of every build, and offer optional retainer arrangements for ongoing iteration after handover.
Best fit for businesses that view software and automation as operational infrastructure, not one-off tasks. Engagements range from focused 2–3 week builds to multi-month transformation projects and ongoing technical partnerships.
If you're scaling operations, adopting AI seriously, or rebuilding how your business runs — send a short brief. I'll respond with a scoped approach and any questions needed to quote accurately.
Best regards,
Muhammad Ans
Co Founder & Team Lead | Innovaxel
Associated with
innovaxel
$1K+
earned
$20/hr
97%
Job Success
$100K+ earned
Start of list.
End of list.
Hello there!
8 years ago, I wrote my first line of code. Today, I architect systems that handle millions. But here's what hasn't changed: my belief that great products deserve obsessive attention. I treat your vision like it's my own; because in our partnership, it is.
I’m Harshad Ladva, a Top 1% Expert-Vetted Senior Developer with over 𝟖 𝐘𝐎𝐄 building 𝐬𝐜𝐚𝐥𝐚𝐛𝐥𝐞 𝐦𝐨𝐛𝐢𝐥𝐞 𝐚𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬, 𝐞𝐧𝐭𝐞𝐫𝐩𝐫𝐢𝐬𝐞 𝐒𝐚𝐚𝐒 𝐩𝐥𝐚𝐭𝐟𝐨𝐫𝐦𝐬, 𝐚𝐧𝐝 𝐡𝐢𝐠𝐡-𝐩𝐞𝐫𝐟𝐨𝐫𝐦𝐚𝐧𝐜𝐞 𝐰𝐞𝐛 𝐬𝐨𝐥𝐮𝐭𝐢𝐨𝐧𝐬. I don't just write code; I architect business-critical digital products using a future-forward stack that includes 𝐀𝐈-𝐝𝐫𝐢𝐯𝐞𝐧 𝐝𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 (𝐕𝐢𝐛𝐞 𝐂𝐨𝐝𝐢𝐧𝐠), 𝐬𝐞𝐫𝐯𝐞𝐫𝐥𝐞𝐬𝐬 𝐜𝐥𝐨𝐮𝐝 𝐚𝐫𝐜𝐡𝐢𝐭𝐞𝐜𝐭𝐮𝐫𝐞𝐬, 𝐚𝐧𝐝 𝐜𝐫𝐨𝐬𝐬-𝐩𝐥𝐚𝐭𝐟𝐨𝐫𝐦 𝐦𝐨𝐛𝐢𝐥𝐞 𝐟𝐫𝐚𝐦𝐞𝐰𝐨𝐫𝐤𝐬.
✅𝐌𝐲 𝐂𝐨𝐫𝐞 𝐕𝐚𝐥𝐮𝐞 𝐏𝐫𝐨𝐩𝐨𝐬𝐢𝐭𝐢𝐨𝐧:
𝐀𝐈-𝐀𝐮𝐠𝐦𝐞𝐧𝐭𝐞𝐝 𝐅𝐮𝐥𝐥-𝐒𝐭𝐚𝐜𝐤 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭: Leveraging Vibe Coding (Replit, Lovable.dev), AI-driven programmers (Cursor Pro, Windsurf), and AI agent automation (n8n, CrewAI) to accelerate development, enhance code quality, and automate complex workflows.
𝐄𝐧𝐝-𝐭𝐨-𝐄𝐧𝐝 𝐏𝐫𝐨𝐝𝐮𝐜𝐭 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭: From Mobile App Development (React Native, Flutter) and Web Development (Next.js, React) to Backend Engineering (NestJS, Node.js, Python) and Cloud DevOps (AWS, Vercel, Kubernetes); I own the entire product lifecycle.
𝐒𝐭𝐫𝐚𝐭𝐞𝐠𝐢𝐜 𝐓𝐞𝐜𝐡𝐧𝐢𝐜𝐚𝐥 𝐏𝐚𝐫𝐭𝐧𝐞𝐫𝐬𝐡𝐢𝐩: I function as your on-demand Lead Developer, ensuring your architecture is scalable, your codebase is maintainable, and your product evolves with market needs.
✅𝐓𝐞𝐜𝐡𝐧𝐨𝐥𝐨𝐠𝐲 𝐒𝐭𝐚𝐜𝐤 & 𝐒𝐩𝐞𝐜𝐢𝐚𝐥𝐢𝐳𝐞𝐝 𝐒𝐞𝐫𝐯𝐢𝐜𝐞𝐬
▪️ 𝐅𝐫𝐨𝐧𝐭𝐞𝐧𝐝 & 𝐌𝐨𝐛𝐢𝐥𝐞 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭:
Web: Next.js, React.js, TypeScript, Angular, Vue.js, Remix, Astro
Mobile: iOS, Android, React Native, Flutter, Expo, Ionic, Progressive Web Apps (PWA)
UI/UX: Tailwind CSS, Material-UI, Shadcn/UI, Framer Motion, Figma to Code
Modern Practices: Server-Side Rendering (SSR), Static Site Generation (SSG), Jamstack Architecture
▪️ 𝐁𝐚𝐜𝐤𝐞𝐧𝐝 & 𝐀𝐏𝐈 𝐄𝐧𝐠𝐢𝐧𝐞𝐞𝐫𝐢𝐧𝐠:
Primary: Node.js, NestJS, Express.js, Python (FastAPI, Django), Go
API Design: RESTful APIs, GraphQL, tRPC, WebSockets (Real-time features)
Microservices & Serverless: AWS Lambda, Vercel/Netlify Functions, Microservices Architecture
▪️ 𝐀𝐈 & 𝐀𝐮𝐭𝐨𝐦𝐚𝐭𝐢𝐨𝐧 𝐄𝐧𝐠𝐢𝐧𝐞𝐞𝐫𝐢𝐧𝐠:
AI-Powered Development: Vibe Coding (Replit, Lovable), Cursor AI, GitHub Copilot, Claude Code, Amazon Q Developer
AI Agent & Workflow Automation: n8n, LangChain, CrewAI, AutoGPT workflows, Custom AI agent development
AI Integrations: OpenAI API, Anthropic Claude, Gemini API, Vector Databases (Pinecone, Weaviate), LLM fine-tuning
▪️ 𝐃𝐚𝐭𝐚, 𝐃𝐞𝐯𝐎𝐩𝐬 & 𝐂𝐥𝐨𝐮𝐝:
Databases: PostgreSQL, MongoDB, MySQL, Redis, Firebase, Supabase, Prisma ORM, Drizzle
Cloud & DevOps: AWS (Amplify, EC2, S3, RDS), Vercel, Google Cloud Platform, Docker, Kubernetes, CI/CD (GitHub Actions, GitLab CI)
Monitoring & Performance: DataDog, New Relic, Lighthouse, Core Web Vitals Optimization
✅𝐈𝐧𝐝𝐮𝐬𝐭𝐫𝐢𝐞𝐬 𝐈’𝐦 𝐓𝐫𝐚𝐧𝐬𝐟𝐨𝐫𝐦𝐢𝐧𝐠 𝐖𝐢𝐭𝐡 𝐀𝐈:
𝐄𝐝𝐓𝐞𝐜𝐡: AI tutors, adaptive learning platforms, automated grading & content personalization
𝐅𝐢𝐧𝐓𝐞𝐜𝐡: Intelligent fraud detection, automated compliance workflows, AI-driven financial assistants
𝐇𝐞𝐚𝐥𝐭𝐡𝐓𝐞𝐜𝐡: Diagnostic support agents, patient journey automation, HIPAA-ready clinical platforms
𝐄-𝐜𝐨𝐦𝐦𝐞𝐫𝐜𝐞 & 𝐌𝐚𝐫𝐤𝐞𝐭𝐩𝐥𝐚𝐜𝐞𝐬: Hyper-personalized recommendations, AI merchandising, automated vendor onboarding
𝐏𝐫𝐨𝐩𝐓𝐞𝐜𝐡: Smart property matching, predictive maintenance, AI document processing for leases
𝐋𝐨𝐠𝐢𝐬𝐭𝐢𝐜𝐬 & 𝐒𝐮𝐩𝐩𝐥𝐲 𝐂𝐡𝐚𝐢𝐧: Route optimization agents, real-time tracking, demand forecasting
✅𝐖𝐡𝐲 𝐈'𝐦 𝐖𝐨𝐫𝐭𝐡 𝐌𝐨𝐫𝐞 𝐓𝐡𝐚𝐧 𝐌𝐲 𝐑𝐚𝐭𝐞
𝐀𝐈-𝐏𝐨𝐰𝐞𝐫𝐞𝐝 𝐄𝐟𝐟𝐢𝐜𝐢𝐞𝐧𝐜𝐲 – Deliver superior quality at accelerated timelines, reducing your development costs.
𝐅𝐮𝐥𝐥-𝐂𝐲𝐜𝐥𝐞 𝐎𝐰𝐧𝐞𝐫𝐬𝐡𝐢𝐩 – From initial concept and technical specification to deployment, monitoring, and iterative improvement.
𝐂𝐥𝐞𝐚𝐫 & 𝐏𝐫𝐨𝐚𝐜𝐭𝐢𝐯𝐞 𝐂𝐨𝐦𝐦𝐮𝐧𝐢𝐜𝐚𝐭𝐢𝐨𝐧 – Daily updates, transparent timelines, and strategic recommendations. Fluent in English.
𝐅𝐮𝐭𝐮𝐫𝐞-𝐏𝐫𝐨𝐨𝐟 𝐀𝐫𝐜𝐡𝐢𝐭𝐞𝐜𝐭𝐮𝐫𝐞 – Build with scalability, security, and maintainability as first principles.
𝐅𝐢𝐱𝐞𝐝-𝐏𝐫𝐢𝐜𝐞 & 𝐀𝐠𝐢𝐥𝐞 𝐌𝐢𝐥𝐞𝐬𝐭𝐨𝐧𝐞 𝐌𝐨𝐝𝐞𝐥𝐬 – Flexible engagement models tailored to your project needs and risk tolerance.
✅𝐖𝐡𝐚𝐭'𝐬 𝐘𝐨𝐮𝐫 𝐕𝐢𝐬𝐢𝐨𝐧 𝐖𝐨𝐫𝐭𝐡?
This isn't an expense; it's your most leveraged investment. Every dollar spent with me returns in accelerated time-to-market, reduced technical debt, and scalable architecture. I don't just build software; I build compound interest for your digital assets. Let's discuss your ROI.
Associated with
GroveTech Solutions
$300K+
earned
$25/hr
100%
Job Success
Available now
Offers consultations
Start of list.
End of list.
Hi there,
I am a Microsoft Certified Full Stack Developer with over 14 years of experience building scalable AI-powered enterprise SaaS platforms, VoIP systems, POS solutions, Internal Dashboards, E-commerce, and MVP development. I specialize in solving complex business problems using modern full-stack technologies and real-world AI integrations.
𝐊𝐞𝐲 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞:
𝐅𝐮𝐥𝐥 𝐒𝐭𝐚𝐜𝐤: .NET Core, ASP.NET, C#, Entity Framework, Blazor, Node.js, Python (Fast API), React, Angular, Next.js, TypeScript.
𝐀𝐈 & 𝐀𝐮𝐭𝐨𝐦𝐚𝐭𝐢𝐨𝐧: OpenAI, LLMs, AI Agents, Voice AI, Chatbot, RAG Systems, Workflow Automation.
𝐀𝐫𝐜𝐡𝐢𝐭𝐞𝐜𝐭𝐮𝐫𝐞: Multi-tenant SaaS, Microservices, REST APIs, Cloud (AWS/Azure), Third-party APIs like- Twilio, Stripe, etc.
𝐈𝐧𝐝𝐮𝐬𝐭𝐫𝐢𝐞𝐬: Healthcare IoT, Fintech, E-commerce, Telecommunication, HR, and others.
I focus on clean architecture, long-term maintainability, and transparent communication. With a 100% Job Success Score and 16,000+ hours on Upwork, I deliver secure, high-performance solutions that drive product growth.
Let’s discuss how I can help bring your project to life.
Best regards,
Harsh K.
Harsh K.
has worked
.
Associated with
GrootNet Software Solutions Pvt. Limited
$35/hr
100%
Job Success
$10K+ earned
Available now
Offers consultations
Start of list.
End of list.
75% avg reduction in manual ops. 3x faster feature shipping. 80% tier-1 support automated. These are the numbers from production AI systems I have shipped as a full stack developer and AI developer for SaaS, manufacturing, fintech, and healthcare teams.
I build production-ready AI infrastructure - not prototypes. Multi-agent systems, LLM integrations, RAG pipelines, and AI automation that replaces real operational work. As a full stack developer and AI developer I own the full build - from LLM selection and agent orchestration to vector databases, API layers, and production deployment.
⭐⭐⭐⭐⭐"Very good communication and follow-up. They resolved not only legacy issues, but also identified and fixed additional problems we had not noticed. The result was a fully functional system that met all our requirements." - Client, Microsoft Copilot Implementation
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
WHAT I BUILD AS A FULL STACK DEVELOPER AND AI DEVELOPER
▸ AI Systems & Multi-Agent Development
▸ Full stack AI infrastructure from LLM selection and agent orchestration to vector databases, API layers, and production deployment. LangChain, LangGraph, RAG pipelines, and agentic AI workflows. ▸ The intelligence core of your product, built by a full stack developer with AI developer depth.
▸ AI Assistant & Chatbot Development
Conversational AI, internal knowledge assistants, RAG-powered document Q&A, and customer-facing chatbots using OpenAI, Claude, or Gemini. AI developer chatbot development integrated directly into your existing stack. Chatbot development that reduces tier-1 ticket volume by 70-80%.
▸ AI Integration & API Connectivity
Full stack developer connecting AI to your existing CRM, ERP, SaaS tools, and databases via REST API, webhooks, LangChain, and workflow platforms including n8n, Zapier, and Make.
▸ AI Automation Agents
Multi-agent autonomous systems that replace manual operational work - lead qualification, procurement pipelines, document processing, outreach, support triage, and reporting. AI automation built by a full stack developer with production deployment experience.
▸ RAG Pipelines & Vector Search
RAG system design, vector database selection and configuration (Pinecone, Weaviate, FAISS), embedding pipelines, semantic search, and document AI. Full stack developer and AI developer work covering the full RAG architecture from chunking to retrieval evaluation.
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
DELIVERY NUMBERS
75% - avg reduction in manual ops
3x - faster feature shipping for product teams
80% - tier-1 support automated via chatbot development
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
CORE TECH STACK
LLM & Models: OpenAI API, GPT-4o, Claude (Anthropic), Gemini, LLM Integration, Fine-tuning, Hugging Face, Whisper API
Frameworks & Orchestration: LangChain, LangGraph, LlamaIndex, RAG, Multi-Agent Systems, Agentic AI, Autonomous AI Agents, Prompt Engineering
Vector & Data: Pinecone, Weaviate, FAISS, Semantic Search, Embeddings, AI Data Pipelines, Document AI
Automation & Integration: n8n, Zapier, Make, REST API, FastAPI, Python, Node.js, AWS/GCP/Azure
Full Stack Developer Stack: Python, TypeScript, React, Node.js, .NET, PostgreSQL, FastAPI
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
INDUSTRIES
Manufacturing | Construction | SaaS | Marketing | Fintech | Healthcare | E-commerce | Real Estate | HR Tech
📩 Send me a description of your current workflow. I will tell you within 24 hours where AI automation can remove the most manual work and what it would take to build it.
Associated with
Althera Code
$10K+
earned
$35/hr
100%
Job Success
$100K+ earned
Available now
Offers consultations
Start of list.
End of list.
Building a backend system that needs to be secure, scalable, and production-ready?
I'm a Senior .NET Backend Developer with 9+ years of experience building high-performance backend systems, REST APIs, and cloud-native architectures for healthcare platforms, fintech systems, SaaS products, and enterprise applications - serving real users at scale.
I have architected HIPAA-compliant healthcare backends used by two major U.S. healthcare organizations, built backend APIs powering Flutter and React Native mobile apps with 500K+ active users, delivered Paycile - a fintech payroll platform on ASP.NET Core, and shipped multi-tenant SaaS platforms on Microsoft Azure handling complex business logic and high-traffic workloads.
🏥 HEALTHCARE & HIPAA BACKEND SYSTEMS
As a .NET Backend Developer, I design and build secure, HIPAA-compliant healthcare backends that handle sensitive patient data, clinical workflows, and real-time coordination across web and mobile. As an ASP.NET Core Developer, I implement role-based access control, encrypted storage, audit logging, and HL7/FHIR integrations that meet compliance standards for regulated healthcare environments.
Healthcare platforms I have built include EHR systems, clinical task management platforms for hospitals, home care nursing systems with caregiver scheduling and EVV tracking, and global healthcare association platforms supporting practitioner management and course administration.
📱 MOBILE APP BACKEND & REST API DEVELOPMENT
As a .NET backend developer, I build robust backend APIs powering iOS and Android apps built with Flutter and React Native—JWT authentication, OAuth2, real-time SignalR, push notifications, Stripe payment integration, and third-party service integrations.
Mobile app backends I have delivered as a .NET backend developer, including fitness platforms with AI meal planning, couples engagement apps, real estate workflow apps, towing dispatch apps, and healthcare mobile platforms—all on ASP.NET Core Web API with Azure cloud infrastructure.
☁️ SAAS & ENTERPRISE BACKEND ARCHITECTURE
As an ASP.NET Core developer, I architect multi-tenant SaaS backends from MVP to production scale, implementing subscription management, billing logic, role-based permissions, background job processing, event-driven architectures, and API-first designs that support long-term product growth.
As a .NET backend developer, I have delivered B2B SaaS platforms, transportation management systems, AI-powered marketing platforms, and enterprise workflow automation for U.S. and international clients across fintech, logistics, real estate, and healthcare.
💳 FINTECH & PAYMENT BACKEND DEVELOPMENT
As a .NET backend developer, I delivered Paycile - a fintech payroll platform built on ASP.NET Core with secure salary processing, multi-currency support, automated payroll workflows, and role-based financial controls for enterprise clients.
As a .NET backend developer, I integrate Stripe, Stripe Webhooks, Apple In-App Purchase, and Google Play Billing, implementing secure transaction processing, subscription billing, invoice generation, and financial audit logging that fintech products depend on.
⚙️ BACKEND TECHNICAL EXPERTISE
As a .NET Backend Developer, my core backend stack includes:
ASP.NET Core, ASP.NET Web API, ASP.NET MVC, C#, .NET Framework, Entity Framework Core, Dapper, CQRS, MediatR, Clean Architecture, Microservices, RESTful APIs, SignalR, WebSockets, Hangfire, JWT, OAuth2, Identity Server, RBAC, SQL Server, PostgreSQL, MySQL, MongoDB, Redis, Azure App Services, Azure Functions, Azure Service Bus, Azure Key Vault, Azure Blob Storage, Azure DevOps, CI/CD, Docker, GitHub Actions, Stripe, Twilio, SendGrid, Firebase, HL7, FHIR, HIPAA compliance.
🔒 SECURITY & COMPLIANCE
As a .NET Backend Developer, I build backend systems with security at the foundation - encrypted data storage, secure API authentication, audit trails, OWASP best practices, and compliance-ready architectures for healthcare, fintech, and enterprise clients.
📊 RESULTS AS A .NET BACKEND DEVELOPER
HIPAA-compliant EHR backend used by 2 major U.S. healthcare organizations
Backend APIs supporting 100K+ active mobile app users
Fintech payroll platform (Paycile) handling enterprise salary processing
Multi-tenant SaaS backends processing thousands of daily transactions
15+ production backend systems across healthcare, fintech, SaaS, and enterprise
💼 SERVICES I PROVIDE AS A .NET BACKEND DEVELOPER
.NET Backend Developer Upwork
ASP.NET Core Developer Upwork
ASP.NET Web API Developer Upwork
C# Developer Upwork
.NET Core Developer Upwork
REST API Developer Upwork
Mobile App Backend Developer Upwork
Healthcare Backend Developer Upwork
HIPAA-Compliant Backend Developer Upwork
SaaS Backend Developer Upwork
.NET Microservices Developer Upwork
Azure .NET Developer Upwork
Fintech .NET Developer Upwork
Payment Gateway Integration Developer Upwork
ASP.NET MVC Developer Upwork
$25/hr
100%
Job Success
$30K+ earned
Available now
Start of list.
End of list.
𝗚𝗼𝘁 𝗮 𝗽𝗿𝗼𝗱𝘂𝗰𝘁 𝗶𝗱𝗲𝗮 𝗯𝘂𝘁 𝗻𝗼𝘁 𝘀𝘂𝗿𝗲 𝗵𝗼𝘄 𝘁𝗼 𝘁𝘂𝗿𝗻 𝗶𝘁 𝗶𝗻𝘁𝗼 𝘀𝗼𝗺𝗲𝘁𝗵𝗶𝗻𝗴 𝘀𝗼𝗹𝗶𝗱?
𝗢𝗿 𝗺𝗮𝘆𝗯𝗲 𝘆𝗼𝘂 𝗯𝘂𝗶𝗹𝘁 𝗮𝗻 𝗠𝗩𝗣 𝗾𝘂𝗶𝗰𝗸𝗹𝘆 𝘂𝘀𝗶𝗻𝗴 𝗔𝗜 𝘁𝗼𝗼𝗹𝘀 𝗮𝗻𝗱 𝗻𝗼𝘄 𝗶𝘁 𝗳𝗲𝗲𝗹𝘀 𝗺𝗲𝘀𝘀𝘆, 𝗳𝗿𝗮𝗴𝗶𝗹𝗲, 𝗼𝗿 𝗵𝗮𝗿𝗱 𝘁𝗼 𝘀𝗰𝗮𝗹𝗲.
I work with founders who want to ship real products, not demos. My focus is clean architecture, practical AI / LLM Integration, and building SaaS Development systems that can scale without needing a rebuild six months later.
I’m Muhammad, a Full Stack Developer specializing in scalable SaaS platforms. I build production-ready systems using Next.js, Node.js, and React, with strong API Integration layers that connect AI capabilities to real business workflows.
I spend more time thinking about structure than features. If the foundation is weak, growth becomes expensive.
AI helps teams move faster, but I don’t rely on it blindly. Architecture, data models, backend stability, and long-term scalability always come first. The goal is simple: launch quickly, but build in a way that won’t break when real users show up.
𝐒𝐨𝐦𝐞 𝐨𝐟 𝐭𝐡𝐞 𝐩𝐥𝐚𝐭𝐟𝐨𝐫𝐦𝐬 𝐈’𝐯𝐞 𝐰𝐨𝐫𝐤𝐞𝐝 𝐨𝐧:
✔𝐍𝐮𝐫𝐌𝐞𝐝
AI-driven clinical assistant platform supporting healthcare documentation workflows with structured AI / LLM Integration.
✔𝐏𝐚𝐤𝐋𝐚𝐰𝐀𝐬𝐬𝐢𝐬𝐭
Legal automation SaaS handling large-scale structured case data with scalable backend systems.
✔𝐅𝐢𝐜𝐭𝐢𝐨𝐧𝐏𝐮𝐛
AI manuscript generation system built on multi-model pipelines designed for long-form consistency and performance.
✔𝐒𝐄𝐍𝐓𝐄𝐄𝐙
AI analytics platform transforming real customer feedback into actionable business insights.
𝐀𝐜𝐫𝐨𝐬𝐬 𝐝𝐢𝐟𝐟𝐞𝐫𝐞𝐧𝐭 𝐩𝐫𝐨𝐣𝐞𝐜𝐭𝐬, 𝐬𝐲𝐬𝐭𝐞𝐦𝐬 𝐈’𝐯𝐞 𝐡𝐞𝐥𝐩𝐞𝐝 𝐛𝐮𝐢𝐥𝐝 𝐡𝐚𝐯𝐞:
➡ Onboarded 𝟱𝟬𝗞+ users
➡ Generated 𝟱𝟬𝗞+ books through AI pipelines
➡ Supported 𝟭𝟬+ hospitals
➡ Processed 𝟭𝟬𝗠+ legal case records
𝐌𝐲 𝐰𝐨𝐫𝐤 𝐭𝐲𝐩𝐢𝐜𝐚𝐥𝐥𝐲 𝐢𝐧𝐜𝐥𝐮𝐝𝐞𝐬:
➡ MVP development
➡ SaaS architecture
➡ Full Stack Development using Next.js and Node.js
➡ AI / LLM integrations
➡ API Integration & Scalable Backend Systems
➡ Blockchain integrations when required
I take ownership seriously. I don’t just build features. I think about how the system will scale, how it will be maintained, and whether it actually solves the problem it was meant to solve.
If you’re building something and want a technical partner who cares about structure and long-term outcomes, I’m happy to connect. I also offer a free initial consultation to understand your goals before we move forward.
Muhammad Mujtaba R.
has worked
.
$20/hr
100%
Job Success
$20K+ earned
Available now
Start of list.
End of list.
I help founders build fast, scalable web and mobile products — and I also step in when AI-generated apps need a real engineer.
If you’ve built something with Claude, Lovable or other AI app builders and now need someone to ship it properly, that’s exactly what I do.
I help Founders Scale with 𝐒𝐚𝐚𝐒 𝐌𝐕𝐏𝐬, 𝐀𝐈 𝐀𝐠𝐞𝐧𝐭𝐬, 𝐚𝐧𝐝 𝐖𝐞𝐛 𝐀𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬 using React, Next.js, Node.js, TypeScript. As a Full Stack Developer & AI Engineer, I specialize in multi-tenant SaaS platforms, intelligent automation, AI integrations, and scalable applications 𝐭𝐡𝐚𝐭 𝐬𝐨𝐥𝐯𝐞 𝐜𝐨𝐦𝐩𝐥𝐞𝐱 𝐩𝐫𝐨𝐛𝐥𝐞𝐦𝐬, 𝐜𝐫𝐞𝐚𝐭𝐞 𝐛𝐮𝐬𝐢𝐧𝐞𝐬𝐬 𝐯𝐚𝐥𝐮𝐞, 𝐚𝐧𝐝 𝐝𝐞𝐥𝐢𝐯𝐞𝐫 𝐨𝐮𝐭𝐬𝐭𝐚𝐧𝐝𝐢𝐧𝐠 𝐮𝐬𝐞𝐫 𝐞𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞𝐬.
🎯 𝐈 𝐩𝐨𝐬𝐬𝐞𝐬𝐬 𝐞𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞 𝐢𝐧 𝐭𝐡𝐞 𝐟𝐨𝐥𝐥𝐨𝐰𝐢𝐧𝐠 𝐝𝐨𝐦𝐚𝐢𝐧𝐬
• Frontend: React, Next, TypeScript, JavaScript, Tailwind CSS.
• Backend: Node.js, Nest.js.
• AI: OpenAI, Anthropic, LangChain, LanGraph, RAG pipelines, embeddings
• Cloud/DevOps: AWS, Docker, Kubernetes, CI/CD, Serverless, Terraform
• Data: PostgreSQL, MySQL, MongoDB, DynamoDB, Firebase, Supabase
• Integrations: Stripe, PayPal, Auth0, social APIs, SendGrid, Socket io
WHAT I BUILD FOR YOU
→ Full-Stack Web Apps (React, Next.js, Node.js, TypeScript)
→ AI-powered SaaS and MVPs, multi-tenant, Stripe billing, RBAC, row-level security, architected to scale from day one
→ AI agents, Voice Ai Agents, RAG systems, and intelligent automation on OpenAI, Claude, Gemini, and LangChain, built around your business logic, not wrapper demos
→ HIPAA-compliant healthtech, HL7, FHIR, EMR integration, clinical workflows to US standards
→ Fintech infrastructure, event-sourced ledgers, escrow, payments, audit-grade reliability
→ Crypto & Web3 Platforms, token dashboards, crypto payment integrations, wallet connections, and DeFi ready backends built for speed and security.
→ API and system integration, REST, GraphQL, webhooks, CRM and ERP, into existing and legacy codebases
→ Cloud and DevOps, AWS, Docker, CI/CD, production deployments that hold up under load
What I help fix
• messy AI-generated code
• weak architecture and logic issues
• performance bottlenecks
• broken integrations
• poor scalability
• unfinished apps that need a senior engineer to take them across the finish line
𝐈 𝐭𝐚𝐤𝐞 𝐭𝐡𝐞 𝐜𝐥𝐢𝐞𝐧𝐭'𝐬 𝐟𝐞𝐞𝐝𝐛𝐚𝐜𝐤 𝐬𝐞𝐫𝐢𝐨𝐮𝐬𝐥𝐲, 🎁 A 100% refund, if I'm unable to meet our agreed commitments. No questions asked!
💬 Ready to build?
Send me a message, I will Provide you a 30min free consultation and I’ll help you move from “We want” to “This is the right Solution for our business.”
Thank you for visiting my profile. Looking forward to working with you!. For reference, you can see my work and testimonials below. Lets Chat!
Keywords to find me on Upwork:
Full Stack AI Engineer, AI SaaS Developer, SaaS MVP Developer, Blockchain Developer, Next.js Developer, React Developer, Node Developer, TypeScript Developer, Supabase Developer, Vercel Developer, Tailwind CSS Developer, AI App Developer, OpenAI Developer, LLM Developer, RAG Developer, LangChain Developer, Chatbot Developer, AI Agent Developer, MVP Developer, Web App Developer, API Integration Developer, Stripe Integration Developer, Performance Optimization, Code Review, App Debugging, Internal Tools Developer, Startup App Developer.