🚀 Azure Certified Senior .NET Developer with 11+ years of experience delivering enterprise applications for Fortune 500 companies, including Wells Fargo, FIS Global, and Winshuttle. I specialize in ASP.NET Core, Angular, Azure, and API integrations, helping businesses build scalable SaaS platforms, internal tools, and modern web applications. I've helped clients: ✔ Build enterprise SaaS products ✔ Modernize legacy .NET applications ✔ Integrate Stripe and QuickBooks ✔ Develop secure REST APIs and microservices ✔ Deliver cloud-native solutions on Azure Core Technologies: ASP.NET Core, C#, Angular, Azure, SQL Server, React, Docker, Azure Functions, GitHub Actions. If you're looking for a senior developer who can understand business requirements, communicate clearly, and deliver production-ready solutions, let's connect.

I built the system UN IFAD uses to track $300M+ in agricultural supply chain value. It won the 2024 World Future Award. DHS trusted me with national infrastructure. If you are building in healthcare, FinTech, or regulated securities and need a system that is both intelligent and provable, we should talk. ⚙️ 𝗔𝗜 𝗦𝗬𝗦𝗧𝗘𝗠𝗦 I build RAG pipelines, multi-agent systems, voice AI, and agentic workflow automation. Production systems I have shipped include an AI-powered legal intake system running on WhatsApp and Twilio Voice handling real client conversations at scale, and EHR-integrated healthcare platforms with appointment booking automation. Healthcare clients get HIPAA compliant AI platforms with EHR integrations including AthenaOne, clinical document RAG systems, patient intake automation, AI voice agents for medical practices, and telehealth platforms. Legal clients get contract review and generation platforms, legal document RAG systems, compliance automation, legal intake bots, and jurisdiction-aware document platforms. 𝑩𝒍𝒐𝒄𝒌𝒄𝒉𝒂𝒊𝒏 𝒂𝒏𝒅 𝑻𝒐𝒌𝒆𝒏𝒊𝒛𝒂𝒕𝒊𝒐𝒏 I write smart contracts in Solidity and Rust, deploy across Ethereum, Solana, XRP Ledger, and Casper, and deliver DeFi protocols, RWA tokenization platforms, and DAO governance frameworks. My contract work has been audited by Quantstamp and Halborn. For regulated securities and digital assets I provide full feasibility studies, MVP platform architecture for digital securities issuance, token standard selection including ERC-3643 permissioned tokens, smart contract design for issuance and maintenance, HSM-based wallet infrastructure for institutional custody, and SEC compliance and transfer agent obligation analysis. Engagements include a written report with a live leadership review session. For custody infrastructure I deliver HSM and MPC wallet systems, settlement automation using blockchain, cross-chain interoperability for tokenized securities, and integration with existing custody systems. For RWA tokenization I handle platform design, investor eligibility and KYC and AML integration, smart contract design for dividend distribution and voting rights, and compliance architecture for Reg D, Reg A+, and Reg S. 𝐇𝐨𝐰 𝐈 𝐖𝐨𝐫𝐤 𝐖𝐢𝐭𝐡 𝐏𝐚𝐫𝐭𝐧𝐞𝐫𝐬 For law firms and financial advisories I work as a technical execution partner. You sell the strategy, I deliver the build. Engagements are compliance-ready and aligned with your legal guidance, with revenue share or retainer arrangements depending on volume. For consultancies I work as a technical subcontractor. Institutional-grade delivery with UN and SEC-compliant track record. Flexible engagement, hourly or project-based. 𝗪𝗵𝗲𝗿𝗲 𝗜 𝗪𝗼𝗿𝗸 𝗕𝗲𝘀𝘁 The clients I work with are healthcare founders, FinTech CTOs, and enterprise teams who need regulated systems that are both intelligent and auditable. If AI makes the decision, blockchain proves it happened. That is the kind of system regulated industries actually need. Before any engagement I do one scoping call. I will tell you exactly what to build, what not to build, and why. If blockchain or AI does not belong in your project, I will say so. That call costs nothing and usually saves months. Message me with two lines about your project. I will respond within 24 hours. 𝗞𝗲𝘆𝘄𝗼𝗿𝗱𝘀: Claude Code, Gemini, GitHub Copilot, Cursor, Lovable, Vibe Coding, MCP, Supabase, TON Blockchain, MEV Bot, Tokenomics, Uniswap V2/V3, PancakeSwap, Crypto Sniping Bot, Wallet Intelligence Monitoring, Automatic Speech Recognition, Real-Time Conversational Systems, TensorFlow, PyTorch, Scikit-Learn, AI-Generated Code, Tachograph Compliance Engine, Advanced LMS, Prediction Based Market Platform, AI Personal Operating System, LLMOps, Multi-Model Workflow, AI Pricing Bot, Forward Deployed Engineer, AI Fuel Intelligence, Behavior Analysis and Monitoring, OpenAI RAG Platform, AI Revenue Systems, Vibe Coding Developer, Fractional AI Architect, Agent Enterprise Ecosystem, Pathwaize Intelligence, AI Operating System, Prototype, Production Hardening, MVP, Testing, Algorithm Development, Data Science, CV, Machine Learning Engineer, Solidity contract architecture, Smart Contract Engineer, ERC20, Asset Management System, Solidity Smart Contract Security, Crypto Sniping Bot, Uniswap V2/V3, PancakeSwap, Crypto DeFi Expert, Wallet Intelligence Monitoring

I build AI-powered SaaS & mobile apps that help startups launch fast and scale and AI trainer. From MVP to production, I handle everything—so you can focus on growth, users, and revenue. ⸻ 💡 What I Do * AI apps (GPT, Claude, automation workflows) * SaaS & MVP development (startup-focused) * Mobile apps (React Native / Expo) * Full-stack systems (React, Next.js, Node, Laravel) * APIs, payments, real-time features ⸻ ⚡ Proven Work * AI legal marketplace (USA) → smart search across 1.3M+ lawyers * BLE sports app (golf) → real-time device tracking with low latency * Healthcare platform → video consultations (WebRTC) ⸻ 🧠 Tech Stack GPT, Claude, Cursor, Replit React, Next.js, Node.js, Laravel React Native, Expo AWS, Vercel, GCP ⸻ 🎯 Why Clients Hire Me * I think like a founder, not just a developer * I build products that scale, not quick hacks * Clean architecture + fast execution * Clear, direct communication ⸻ 👉 Building something serious? Send an invite.

Java Backend and Full Stack Architect. 16,000+ verified hours on Upwork building backend systems, HL7 and FHIR healthcare integrations, SaaS platforms, and mobile apps with Java, Spring, Angular, and AWS. I have spent 10+ years designing and building production backends. My largest Upwork contracts run into the thousands of hours each: a 5,130-hour microservices and AWS backend, a 2,012-hour SaaS analytics platform, and active enterprise integration work. I go deep and I stay for the long haul. I do not just ship features. I design systems that do not break. WHAT I DO BEST Backend and architecture, my strongest area - Java, Spring Boot, Spring Security, JPA, Hibernate - Microservices and event driven systems - API design and third party integrations - Postgres, reliability and performance work - AWS architecture, Docker, CI/CD Full stack - Angular, React, Next.js, Node.js - Frontend architecture that stays clean as the app grows WHERE I HAVE DEPTH Healthcare systems and integration - HL7 v2 and FHIR R4 integrations, Mirth Connect interface engines - Health data platforms (openmhealth) - EHR and EMR data exchange, PHI handling and audit trails - Patient scheduling, remote monitoring, care management SaaS platforms - 2,012 hours on a SaaS analytics platform, plus dashboarding and reporting systems - Multi-tenant backends, subscription and access control - MVP to production builds AI, built into the systems above - OpenAI and LangChain integrations, RAG pipelines, semantic search - Document intelligence and text extraction for clinical and business data - AI Voice Agent PROOF - 16,321 hours logged on Upwork, all verified by the platform - 47 completed contracts, 100% Job Success, Top Rated Plus - $900K+ earned here - My longest single contract ran 5,130 hours. Clients keep me for years. HOW I WORK - I think in architecture first, then code - I build for the next two years, not the next two weeks - I write clearly. You will never have to guess what I meant - I own the work from planning through deployment - I flag problems early, even when the news is bad GOOD FIT IF - You need an engineer who makes architecture decisions, not just takes tickets - Your backend has to be stable, secure, and scalable - You are integrating healthcare data or building a SaaS product - You are planning for the long term NOT A FIT IF - You are shopping for the lowest rate - You want a patch, not a fix - Clean, maintainable code is not a priority for you Send me a message with your project details. I will tell you how I would approach it, and I will be honest if I am not the right person for it. Ganesh

✅ ⭐️⭐️⭐️⭐️⭐️ Ratings in most of the jobs ✅ 100% job success score ✅ Node Js, React Js, Angular Js I'm an expert Full Stack developer (10+ years in Laravel framework and 4+years of experience in Symfony) with extensive experience in building high quality sites. Having 8 years of experience range from building responsive mobile sites that work well cross-browser to building scalable sites for the industries like Hospitality management with membership as well as social media integration, Staffing, Financial, Real Estate, Travelling, Mobile recharge, IPTV and ISP recharge, Online Magazine, Online Store, Job Portal and Portal for Online Video etc. I would like to work on projects with a team (or individually) that cares about creating beautiful and usable interfaces. It's important to me to build long term relationships with clients, so I'm primarily looking for long term projects. I am flexible with my working hours and I'm happy to work closely with any existing freelancers you work with. I look forward to hear from you! Here is my Skill Set Web Development ✔ Languages – PHP, HTML, HTML5, CSS, CSS3, JavaScript, AJAX ✔ CSS Frameworks – Bootstrap ✔ JavaScript Frameworks – jQuery, AngularJS, Vue.js, React.js, TypeScript ✔ Core PHP ✔ PHP Frameworks – Symfony 2,3,4,5,6, CodeIgniter, CakePHP, Laravel 5,6,7,8,9,10 version ✔ WordPress ✔ Shopify 💳 Payment Gateways ✔ Stripe ✔ PayPal 🔗 API Integration ✔ Twilio, Sailthru API, Aradial, Selevision, Perfect Reach ✔ Facebook, Google+, Mailchimp, REST API, Twitter API ✔ Stripe API, Mailchimp API 🛠 Bug Tracking & Project Management ✔ Trello, Jira, Mantis, Redmine, ClickUp 💻 Operating Systems & Servers ✔ OS – Linux, Windows ✔ Server – Vey Basic knowledge of AWS and Digital ocean 🗄 Databases ✔ MySQL, SQL, MongoDB 📂 Version Control Systems (VCS) ✔ Git (GitLab, Bitbucket, GitHub, Beanstalk)

70% of Founders still Burn months & Half their runway building a SaaS the WRONG WAY. I help founders go from idea to a live, Revenue-Ready SaaS product. Implementing an AI-assisted development system that compresses build time without cutting corners on architecture. I’ve worked directly with SaaS founders for the past 8 years. And built Exonix along the way, where we Engineer for What Actually Matters. In 4+ years, we've shipped 30+ SaaS products and 15+ AI-powered apps to real, paying users. Here’s one of the statistics of RECENTLY SHIPPED app: ➞ 469+ Users | 5 ⭐⭐⭐⭐⭐ Reviews | 1000+ Downloads ------------------------------------------------------------- WHAT MAKES ME STAND OUT What makes me stand out is our Clarity-First approach. This helps us differentiate ourselves from a Savvy who does not understand What To Build and What Not To. I implement a data-driven strategy from day one for your product. This helps you save time, build on a budget, and optimize for PAYING USERS. Where most of the SaaS founders just develop, I help you build for success. ------------------------------------------------------------- WHAT I BUILD FOR FOUNDERS I build SaaS platforms, AI-native products, and mobile apps (iOS/Android, on App Store and Play Store) using React, Next.js, Node.js, PostgreSQL, and AWS, plus GPT-4o, LangChain, and vector databases (Pinecone) when the product calls for AI. We align Stack Decisions to your growth stage, not to pad a resume. A pre-seed MVP and a SaaS scaling to 50k users need different foundations, and I'll tell you which one you actually need. ------------------------------------------------------------- WHY A SENIOR DEVELOPER ISN’T ALIGNED WITH YOU What I bring that a senior freelance developer typically can't: I've built this team from the ground up, and I've watched founders lose their runway to one specific mistake: choosing a stack or scope that looks impressive on day one but creates 6+ months of technical debt by year two. My Job is to PREVENT that! I scope for validation first, polish for user-readiness second, and only then architect for scale: in that order, never reversed. If you're a non-technical SaaS founder, I'm your technical co-pilot: making the architecture, team, and build-vs-buy decisions, not just writing the code. MY 8+ YEAR TRACK RECORD -Launched 30+ SaaS products and 15+ AI/Generative AI applications over the last 4 years, from concept to paying customers -Grew Exonix from a solo freelance practice into a 50+ person team — now holding Upwork's Expert-Vetted badge, both individually and as an agency -Directly worked on or managed 200+ projects for founders and enterprises across the US, UK, Australia, UAE, Saudi Arabia, and Germany -AWS Certified Cloud Specialist, deploying infrastructure that scales without inflating your burn rate I work best with founders who have a real problem to solve and want technical direction, not just a coder taking orders. If you can tell me your stage, your idea, and what's actually blocking you, I'll tell you honestly whether we're a fit — and if a 4-6 week AI-assisted build is realistic for what you're trying to launch. Message me and let's find out.

In 10+ years, I have shipped products used by real businesses across AI automation, SaaS platforms, mobile apps, and enterprise integrations. ➝ Built an enterprise AI agent orchestration platform supporting GPT-4o, Claude, and Gemini with real-time monitoring, governance controls, and automated workflows across Marketing, HR, Supply Chain, and Customer Success. ➝ Built production n8n and Make automation systems connecting Xero, Shopify, CRMs, and third-party APIs with webhook-driven workflows, idempotency engines, and zero-error track records since deployment. ➝ Built multi-tenant SaaS platforms with schema-based data isolation, RLS policies, role-based access control, Stripe subscription billing, and full admin dashboards running in production. ➝ Integrated OpenAI, Claude, Azure OpenAI, and LangChain into real products, building AI agents, RAG pipelines, document processing systems, and agentic voice workflows using Retell.ai. ➝ Engineered custom NLP engines with 93.3% entity accuracy, sub-20ms responses, and scalable processing across 500+ products in a 5-step state machine. ➝ Developed React Native and Flutter apps with real-time features, third-party payments, and map integrations, delivered simultaneously on iOS and Android with 100k+ combined users. ➝ Built and integrated complex third-party systems including DocuSign contract workflows, IMAP email ingestion, Xero accounting automation, government compliance APIs, G2A catalog sync, and multi-system automation pipelines. ➝ Worked across SaaS, healthtech, logistics, e-commerce, sports, fintech, real estate, and AI automation, adapting quickly to domain requirements without hand-holding. ➝ Maintained a 100% Job Success Score with Top Rated Freelancer, across 150+ completed Upwork projects with long-term client relationships and on-time delivery. My stack covers the full product: ➝ AI Automation & LLM Integrations • OpenAI, Claude, Gemini API, LangChain, Pinecone, FAISS, RAG Architecture • AI Agents, n8n, Make, Zapier, Retell AI Voice Agents, Workflow Automation ➝ Frontend Development • React, Next.js (App and Pages Router), Vue.js, TypeScript • Tailwind CSS, shadcn/ui, Redux, React Query, Framer Motion ➝ Backend Development • Node.js, NestJS, Express.js, Python, Django, FastAPI, Flask • Supabase, Firebase, REST APIs, GraphQL • WebSockets, Socket IO, JWT and OAuth ➝ Mobile Development • React Native (Expo & CLI), Flutter • Real-time chat & video (Twilio, Agora, WebRTC) • Stripe, Maps, Push Notifications ➝ Database & Cloud • PostgreSQL, MySQL, MongoDB, Redis • AWS (S3, EC2, Amplify), Google Cloud I work best with founders and technical leads who need one reliable engineer to own the build end-to-end. I communicate clearly, flag blockers early, and treat your deadline as mine. Send me a message with your requirements, and I will outline your technical roadmap within hours. Bhavin Sen

Senior Full Stack Developer. Top Rated Plus, 100% Job Success, $276K+ earned across 54 jobs since 2014 on Upwork. CEO/CTO at 2muchcoffee agency. Recent work: Faktastisch (1700+ hrs, $86K, 5-star) full-stack React/Node SaaS rebuild, Proctoring MVP (active), educational platform ($29K React/Next.js), CTO-as-advisor engagements. Past production builds: MediBrain, MyAnswer, VoiceDesk, Cosmo marketplace, Stepler (N1 Swedish Appstore fitness). What I deliver: - Senior full-stack architecture: React + Next.js frontend, Node.js + NestJS backend, PostgreSQL/MongoDB - Code review and architecture consulting for engineering teams - Production-ready SaaS from MVP to scale - TypeScript end-to-end, GraphQL APIs, Supabase, AWS infrastructure - AI integration when projects call for it: OpenAI, RAG, LangChain Tech stack: React, Next.js, Node.js, NestJS, TypeScript, PostgreSQL, MongoDB, GraphQL, Supabase. Strong Angular and Python background. Lead engineer for product teams. Senior Full Stack Developer, Full Stack Developer, React Developer, Next.js Developer, Node.js Developer, NestJS Developer, TypeScript Developer, Architecture Consultant, Code Review Specialist, AI Integration Developer.

I am a Solution Architect and Full-Stack Engineer with 22+ years of experience building SaaS platforms, healthcare systems, and complex workflow solutions. Example: Architected and built a multi-tenant healthcare practice management system supporting patient intake, scheduling, lab integrations, and RCM workflows. What I Help Healthcare and SaaS Clients Build: • Healthcare SaaS Platforms – practice management systems, patient portals, telehealth workflows • Multi-Tenant SaaS Applications – scalable dashboards, admin portals, workflow automation • AI-Enabled Product Features – document processing, AI agents, automation pipelines • Integration Platforms – EHR integrations, third-party APIs, and CRM systems • Data-Driven Dashboards – analytics, reporting, operational dashboards Over the past decade, I have worked extensively in healthcare, developing systems such as: • Practice management platforms • Patient intake and scheduling systems • Lab integrations and patient portals • Revenue cycle management (RCM) workflows • EHR integrations with systems such as AthenaHealth, DrChrono, Waystar, and TriZetto • Healthcare document processing and fax automation systems Many of these platforms required HIPAA-sensitive data handling, complex business logic, and secure multi-tenant architectures. Core Expertise • SaaS Architecture & Multi-Tenant Systems • Healthcare Technology & Workflow Automation • AI Integration (OpenAI / Claude / document processing / Azure AI Foundry / AI Agents / Agno) • API Integrations & Backend Architecture • Full-Stack Development (React / Python / Node / Java / Spring) • Cloud Platforms (AWS / Azure / GCP / scalable SaaS infrastructure) Technologies • React · Next.js · Node.js · Python · Java · Spring Boot • PostgreSQL · MySQL · MongoDB • Supabase · REST APIs · Cloud integrations Certifications • TOGAF 9.1 Certified Enterprise Architect • Sun Certified Developer for Java Web Services (SCDJWS) • Sun Certified Java Programmer (SCJP)

I build production-grade SaaS products for startups and mid-market teams. Most start with one focused build and grow into multi-year partnerships. 100% Job Success, Top Rated Plus. 15+ years' experience, 11 years on Upwork. 7 SAAS platforms over $10M in revenue each. 14 hours availability, until 2 pm PST. I'm a founder-engineer, not a middleman. When you hire me, you get direct ownership of your build plus a senior team that has shipped for regulated, high-stakes environments. Developed SaaS platforms, web applications, REST and Graphql API's for both web and mobile. As a cloud architect I also manage end-to-end software development cycle using git workflows, cloud deployment on AWS and Azure (using Docker and Kubernetes), maintenance, upgrade, and disaster recovery. I have innate ability to understand current business process or software system and design and build new software system that vastly improves upon the current state. I can also act as your temporary CTO for your SaaS startup during the critical period when you’re trying to launch your MVP or get your platform off the ground. What type of development do I do: ********************************* New development: As a SAAS developer and cloud architect I specialize in developing mission critical and practical applications (SAAS or custom software) for both established businesses and startups. I have extensive experience in pure web application as well as cross platform applications and have built several high traffic, low latency applications (for both mobile and web) that need to scale very well in real time. SAAS prototyping for MVP: I can do rapid prototyping of SAAS platforms and being a SAAS developer with extensive experience I ensure quick turnaround in minimal time and budget. Auditing and taking over development and maintenance of existing platforms: I have extensive experience in taking over an existing web/mobile applications, audits it, work on improvements and maintain the for the owner. Domains/industries across which I have extensive expertise are: ************************************************************************ • SAAS platforms for real estate and mortgage companies • Real time stock market applications • Real time geo-location platforms • Background system • Social media platforms with very low latency • ERP, CRM, newsletter platforms for marketing Personal strengths: ********************** # I am very good at understanding and deciphering complex business logic and solve them programmatically. I also have very good knowledge of algorithms. # I have extensive experience in handling large MYSQL database with high volume traffic. I can write optimized sql queries and can audit sql queries to fix slow running queries. # I have practical and in-depth knowledge about code quality, various testing (unit testing, security testing, stress testing). I am very comfortable in setting up full stack application on bare-bone servers. I am also very comfortable working on terminal. # I have extensive experience in working in remote team and leading multi-member teams and managing source code through assembla and Bit Bucket. I am comfortable at working in both supervised and unsupervised environment. I love to help people and am available for free 20 minutes consultation for most of the time. Drop me a message!