𝟏𝟓+ 𝐒𝐚𝐚𝐒 𝐩𝐫𝐨𝐝𝐮𝐜𝐭𝐬 𝐬𝐡𝐢𝐩𝐩𝐞𝐝 · 𝟖+ 𝐰𝐢𝐭𝐡 𝐀𝐈/𝐋𝐋𝐌 𝐢𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧𝐬 · 𝟖+ 𝐲𝐞𝐚𝐫𝐬 𝐛𝐮𝐢𝐥𝐝𝐢𝐧𝐠 𝐩𝐫𝐨𝐝𝐮𝐜𝐭𝐢𝐨𝐧 𝐬𝐲𝐬𝐭𝐞𝐦𝐬 I help founders turn ideas into AI-powered SaaS products, shipped in weeks, not months. I'm new to Upwork, but not new to shipping. For the last 8 years I've been building SaaS platforms, e-commerce systems, and AI-powered products for founders and funded startups If you're a founder with a validated idea but no technical co-founder, or a startup that needs to move from prototype to production fast, I build the kind of SaaS platform that actually launches, gets users, and scales. Not a throwaway prototype. Not a 6-month build. A real product your customers can use. 𝐖𝐡𝐨 𝐈 𝐰𝐨𝐫𝐤 𝐰𝐢𝐭𝐡: → Non-technical founders building their first AI SaaS MVP → Funded startups moving from prototype to production → Product teams adding AI features to existing platforms → Agencies needing a senior developer to own delivery 𝐖𝐡𝐚𝐭 𝐈 𝐛𝐮𝐢𝐥𝐝: → AI-powered SaaS platforms with multi-tenant architecture, subscription billing (Stripe), and role-based access → LLM integrations using OpenAI, Claude, and Gemini APIs — chatbots, AI agents, document intelligence, RAG pipelines → MVPs shipped in 4-8 weeks with clean architecture that won't need a rewrite at scale → Admin dashboards, CRMs, and internal tools with AI baked in where it actually moves the needle → Real-time features with WebSockets and Pub/Sub (PubNub), plus HIPAA-compliant healthcare platforms 𝐓𝐞𝐜𝐡 𝐬𝐭𝐚𝐜𝐤: Frontend: React, Next.js, TypeScript, Tailwind CSS, Shadcn Backend: Node.js, Express, NestJS, Python, FastAPI Database: PostgreSQL, MongoDB, Supabase, Redis AI/LLM: OpenAI API, Claude API, LangChain, Pinecone, RAG, vector search Payments: Stripe subscriptions and billing Auth: Clerk, NextAuth, JWT, OAuth2, RBAC Deploy: AWS, Vercel, Docker, CI/CD Automation: n8n, Zapier, custom workflows 𝐇𝐨𝐰 𝐈 𝐰𝐨𝐫𝐤: 1. Discovery — I learn your product, users, and constraints. I tell you honestly if I'm the right fit. 2. Architecture — Before writing code, I define what we're building and why. Clear scope, timeline, milestones. 3. Build — I ship in weekly sprints. You see working software every week, not status updates. 4. Launch — Production deployment with monitoring, documentation, and 2 weeks of post-launch support. 𝐑𝐞𝐜𝐞𝐧𝐭 𝐰𝐨𝐫𝐤: → Event ticketing SaaS with real-time availability, tiered pricing, and marketing automation. Delivered 35% higher conversions and 60% wider campaign reach. → Cross-border logistics platform on MERN stack with Stripe, real-time tracking, and admin dashboard. Resolved 90% of production bugs and lifted conversions 26%. → Headless WooCommerce rebuild with React, Next.js, and Laravel backend for an industrial services business. 45% faster load times and 30% more transactions. → HIPAA-compliant patient management platform with secure data handling and integration workflows for US healthcare clinics. 𝐖𝐡𝐲 𝐜𝐥𝐢𝐞𝐧𝐭𝐬 𝐡𝐢𝐫𝐞 𝐦𝐞: ✔ Strategic partner, not just a coder: I point out gaps and suggest better approaches ✔ Production-first: clean code, proper error handling, scalable architecture from day one ✔ Fast iteration: MVPs in 4-8 weeks using modern AI-assisted development workflows ✔ Clear communication: weekly demos, honest timelines, no disappearing acts ✔ Full ownership: from discovery to deployment to post-launch support 𝐈𝐧𝐝𝐮𝐬𝐭𝐫𝐢𝐞𝐬: SaaS, Healthcare/HIPAA, E-commerce, FinTech, EdTech, Marketplaces 𝐍𝐞𝐱𝐭 𝐬𝐭𝐞𝐩: Send me a message with your idea, rough budget, and timeline. I'll reply within 24 hours with: - Whether I'm the right fit (I say no to bad-fit projects) - A rough scope and phased timeline - 2-3 questions to sharpen the direction No sales pitch. No pressure. Just a straight answer. AI SaaS Developer, AI Full Stack Developer, SaaS MVP Developer, AI Engineer, LLM Integration, OpenAI API, Claude API, Anthropic API, AI Chatbot Developer, AI Agent Developer, RAG Pipeline, LangChain, Vector Database, Pinecone, Next.js Developer, React Developer, Node.js Developer, TypeScript, Full Stack JavaScript, Multi-Tenant SaaS, Stripe Integration, Subscription Billing, HIPAA Compliant Developer, Healthcare Software, MVP Developer, Startup MVP, Rapid Prototyping, Production-Ready SaaS, FastAPI, Python, PostgreSQL, Supabase, Real-Time Applications, WebSockets, PubNub, n8n Automation, Zapier, Workflow Automation

⭐⭐⭐⭐⭐ "Devashish just understood my project quickly and finished in 3 days — I had given him 15 days. Impressive." If you're building a SaaS product, a marketplace, or adding AI features to your existing app — you need a developer who's done it before, in production, at scale. I'm Devashish, a Full-Stack JavaScript developer with 6+ years of experience shipping real products used by real users. I've built platforms across healthcare, fitness, food delivery, book tech, virtual events, and enterprise workforce management — from early-stage startups to companies running IBM enterprise systems. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🤖 AI INTEGRATION — MY CURRENT FOCUS ━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Businesses need AI features but can't hire a full ML team. I bridge that gap — as a full-stack developer who understands both the product and the AI layer. What I can build for you: → Custom AI chatbots trained on your own data (RAG pipelines) → Semantic search using OpenAI embeddings + pgvector / Supabase → OpenAI API integrations — GPT-4, streaming, function calling, assistants API → AI-powered workflows — document Q&A, content generation, smart recommendations → Vector database setup and optimization (pgvector, Supabase) ━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 💻 FULL-STACK DEVELOPMENT ━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Frontend: React.js, Next.js, Vue.js, React Native — fast, responsive, pixel-perfect UIs. Complex dashboards to consumer mobile apps. Backend: Node.js + Express, REST & GraphQL APIs, real-time features via Socket and PubNub. Built for scale and reliability. Databases: MongoDB, PostgreSQL, MySQL, Supabase — including vector search with pgvector. Payments & Integrations: Stripe, PayPal, Firebase, Mixpanel, IBM TRIRIGA/Maximo, OAuth/JWT. Testing & Quality: Jest, React Testing Library, Postman — I write tests, not just code. ━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🏗️ PRODUCTS I'VE SHIPPED (LIVE & IN PRODUCTION) ━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 🧠 Marigold Health Mental health & drug recovery platform with real-time patient-provider communication. Tech: React, Node.js, React Native, PostgreSQL, PubNub, Mixpanel 🎪 Xpro.ai Virtual exhibition platform with avatar navigation, 3D environments, and live audio/video. Tech: React, Node.js, Socket, MongoDB, Firebase, Unity 📚 Hardcover Book discovery & tracking platform — reusable component architecture, optimized UX. Tech: React.js 🍱 Tiffin Mom Meal subscription & food delivery platform with PayPal integration and order management. Tech: React, Node.js, MySQL 💪 MokoBoko Fitness studio booking with Stripe payments, class scheduling, and user management. Tech: React, Node.js, Stripe, Supabase 🏢 FieldFLEX Enterprise workforce management platform — B2B, distributed teams, IBM ecosystem. Tech: Vue.js, Node.js, PostgreSQL, IBM TRIRIGA/Maximo ━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ⭐ CLIENT REVIEWS ━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ⭐⭐⭐⭐⭐ "Devashish did a wonderful job. What stands out most is going the extra mile and guiding me for problems that might come up in the future. Thank you!" ⭐⭐⭐⭐⭐ "If you have the opportunity to work with Devashish, go for it! He is skilled and we look forward to working with him again for our next Node.js project!" ━━━━━━━━━━━━━━━━━━━━━━━━━━━━ ✅ WHY CLIENTS REHIRE ME ━━━━━━━━━━━━━━━━━━━━━━━━━━━━ → I've worked in remote-first, distributed teams across time zones — async communication is second nature → I ask the right questions before writing a line of code — no mid-project surprises → I deliver complete, tested, documented features — not rough drafts → I finish early more often than late → You won't need to hand-hold me — I take ownership and keep you updated ━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 📩 LET'S TALK ━━━━━━━━━━━━━━━━━━━━━━━━━━━━ Send me a message describing your project — even a rough idea is enough to start. I'll tell you honestly if I'm the right fit, and if I am, we'll move fast.

With 14+ years of experience in solution architecture and software engineering, I specialize in designing and delivering AI-powered platforms, multi-agent orchestration systems, and enterprise-grade integrations for complex business environments. I have hands-on experience architecting production AI systems using LangChain, AWS Bedrock, Claude, and GPT-4 — including multi-agent workflows with intent routing, RAG-based knowledge systems, and real-time communication pipelines via Twilio and Vonage. I have worked on HIPAA-aligned healthcare platforms covering patient intake, clinical scheduling, EHR data flows, and secure messaging across multi-location clinical networks. My approach combines deep technical architecture with business process thinking — I don't just design systems, I ensure they solve the right problems at the right scale. My Skill Sets: Market Research =============== I know thorough research and analysis are the bedrock of any successful product. Here are the key business analysis skills I bring to the table: - Gathering detailed requirements - Conducting in-depth market and competitor research - Performing comprehensive technical product research Solution Architect =============== Selecting the right technology and using it effectively is key to creating great products. I use my software development skills and problem-solving abilities to design successful software solutions. Here are the skills I bring as a solution architect: - Creating a product roadmap - Develop data architecture design - Formulate strategic plans for component development to sustain future project objectives - Create team strategies and establish project scope of work - Suggest architectural improvements, design, and integration solutions - Formulate methodologies to optimize object-oriented software and database development. User experience research & design ============================= I conduct thorough research on how users behave and design the entire product with the user in mind. Here are my user experience research and design skills: - Qualitative research - Product analysis - Usability & Heuristics testing - Journey mapping - Wireframes & Rapid Prototypes - UX Engineering Project management ================== The technical knowledge and experience I have acquired while handling various projects allow me to effectively manage and lead the team through complex situations. Here is what I am capable of as a project manager: - Product Lifecycle Management - Agile & Scrum - Team Leadership - Risk & budget management - Gap Analysis Technical Experience ================== The inside knowledge of various technologies helps me with product analysis and management. I have hands-on experience with the following technologies: - Architecture and modeling - UML, BPMN, ERM, Design Patterns (GOF) - Front-end - HTML5, CSS3, JavaScript, BootStrap, JQuery, Typescript, AngularJS - Back-end – PHP, Node.js, Laravel, Zend, YII, - Data access - MySQL, MongoDB, MS SQL - Tools - Git, Azure DevOps, Docker, Kubernetes, CI/CD, Trello, Slack, Teamworkpm - AI / LLM - LangChain, AWS Bedrock, Claude Sonnet, GPT-4, GPT-4o - Multi-Agent Orchestration - Intent routing, specialist agent design, RAG pipelines - Vector Databases - Pinecone, pgvector - Healthcare / HIPAA-aligned architecture - Voice & Messaging - Twilio, Vonage, PubNub - EHR Integration concepts - HL7, FHIR Feel free to contact me so that I can discuss your project requirements and find out how we can work together to achieve your business goals.

Chirag Talsaniya Senior Mobile Developer | Delivering Exceptional Apps Since 2014 About Me: Hello! I'm Chirag, a seasoned Mobile Developer with a decade of experience in transforming innovative ideas into top-quality mobile applications. I specialize in both Android and iOS platforms, with an emphasis on seamless user experiences, robust backend integration, and high-performance solutions. Over the years, I have consistently surpassed client expectations, delivering products that meet both technical requirements and business objectives. Technical Proficiencies: API Integration: Expertise in REST and SOAP APIs with proficiency in JSON and XML parsing. Social Media Integration: Comprehensive experience integrating Google, Facebook, Twitter, Instagram, and Microsoft Live. Payment Solutions: Proficient in implementing secure payment gateways, including In-App Purchases, PayPal, Beanstream, Payeezy, and Moneris. Database Solutions: Skilled in SQLite, Room, and Realm databases, ensuring data efficiency and reliability. Real-Time Features: Proficient in Firebase, Push Notifications, Socket.io, and PubNub for robust, real-time interactions. UI/UX Excellence: Specialized in Android and iOS design, including Material Design principles for an intuitive user experience. Ad & Analytics Integration: Experienced with Google AdMob, Google Analytics, and Airpush for effective ad management and insightful analytics. Technology Stack: Android: Java, Kotlin, Android Studio Cross-Platform: Flutter (Dart), React Native Backend Development: Node.js Frontend Development: Angular, React iOS Development: Xcode, Swift, Objective-C Why Work With Me? I am committed to delivering applications that not only meet technical specifications but also enhance user engagement and business value. With my consultative approach, I ensure a thorough understanding of your goals, followed by clear, actionable steps to bring your ideas to life. I tackle complex challenges with a solutions-oriented mindset, providing consistent communication and quality at every stage. Let’s Get Started! Whether you're in the initial stages of an app concept or looking to optimize an existing application, I bring the expertise to make it a success. Reach out today, and let’s discuss how we can create impactful digital experiences together. Best Regards, Chirag Talsaniya 🌐 Portfolio 📧 chirag.talsaniya20@gmail.com

🚀 Hi! My name is Syed Tehrim and I am an Android and iOS engineer (Native + React Native + Flutter) A good team player. Regards to my personal skills, I'm able to work both as a team member and independently. I can easily perform in a fast-paced agile environment. I'm also a good communicator and a kind person with strong analytical skills. Finally, I'm always looking for opportunities for self-development. ✔️ Experience: more than 6 years in Mobile Application Development ✔ Worked On Chat app using react-native-gifted-chat/WebSocket/SignalR,PubNub ✔ Fintech Banking Apps ✔ Worked On the Dating app ✔ Utilities app ✔ B2B Apps ✔ E-Commerce Apps ✔ IOT apps and embedded integration apps Worked with Below Technologies/Tools ✔ React Native ✔ Flutter ✔ Android and iOS ✔ Firebase Auth/ Firebase Realtime Database/ Firebase Hosting/ Firebase Fire store / Firebase cloud functions/ Firebase Push notifications/ Firebase config ✔ Redux/ Redux Saga ✔ MVVM | MVC | MVP | Clean Architecture ✔ Java | Kotlin | Jetpack Compose | KMM | KMP | Javascript | Typescript ✔ Xcode | Android Studio | IntelliJ IDEA ✔ BitBucket/Github/Gitlab ✔ JIRA | Trello | BaseCamp ✔ Postman | Swagger | Heroku ✔ Payment Gateways: Stripe, Braintree, Mango Pay, PayPal ✔ Datadog | Redash | Pendo | Firebase | Instabug | ✔ CI/CD - Jenkins and Bitrise Skills (GENERAL): Java, SQL, Database Management, Project Management, Unit Testing, UML, Typography, Version Control (Bitbucket, GitHub), Agile based project management, JIRA, NoSQL, User Experience (UX), Design Patterns & Architecture, FinTech & Banking I provide free support for maintenance also depending upon the type and budget of the project. Thanks Best Regards Syed Tehrim

I am Shubhadeep Roychowdhury from India, a seasoned professional with over 19 years of extensive experience in various critical and time-sensitive projects. My expertise spans across multiple domains including Big Data analysis, web development, and advanced machine learning. Currently, I lead the Data Science division at Spottedzebra, where I manage and develop cutting-edge NLP models and LLM-based applications. My prior roles include Senior Data Scientist at Kpler SAS, Senior Software Engineer at Robocorp Inc., and CTO at CodistAI, where I have consistently delivered impactful and scalable solutions. My technical skills encompass a wide range of technologies and languages including Python, Go, C, C++, JavaScript, PHP, and Rust. I have a deep understanding of cloud platforms (AWS, GCP), containerization (Docker, Kubernetes), and version control systems (Git). Additionally, I am proficient in various machine learning frameworks (TensorFlow, PyTorch, Keras), data engineering tools (Apache Beam, Kafka, Redis), and database systems (MySQL, PostgreSQL, MongoDB, DynamoDB). I am an avid technologist and a quick learner, always eager to explore new horizons and listen to innovative ideas. Client communication and successful, timely project delivery are my core strengths. Throughout my career, I have architected and implemented numerous high-value projects, both in my professional roles and as a top-rated freelancer on platforms like Upwork. If you are looking for a world-class professional to bring your project from concept to execution, please review my skill set and reach out. Till date I have worked on 30+ projects in Upwork and earned more than $60k with raving reviews from my clients. I had taken a break and now I am back to Upwork with even better skills and more experience under my belt. I am confident that my experience and expertise will exceed your expectations.

Mobile app developer with 8+ years in Android App development using frameworks like Core Java and Kotlin. The main focus is to work on the Architectural level and UI of the app. Wide range of Mobile Apps developed for different verticals like Transportation ( Taxi dispatch/booking/ Route optimization / Geo fencing / Google Maps ), Video streaming, Location-based applications, Fitness, Legal, Business Automation, Social, etc. Providing the Design UI/UX using Sketch, Photoshop, etc. tools. For Wireframing: Invision, Balsamiq, Marvel, and Mockingbot applications. For security- have an Understanding of mobile security protocols, analytics, and social channel integration. Device, Kit that I have experienced with Bluetooth Low Energy (BLE), iBeacon, Datzing, NFC, credit card reader, MIDI. Development Process to be followed : - Scrum Meeting: Daily Scrum meeting to update the project progress and tasks/priorities assigned. - Follow CMMI level 3 coding practices and development standards, built over Microsoft/Industry best standards. - Ace-project tool or any other Project Management Tool you recommend, for tracking and controlling tasks - Daily Progress Report sharing. - Using Git, or SVN as code versioning tools. - Weekly Builds: We will host a build/release every week. - Communication tools like S-kype/ Phone/ Google Hangout call etc. will be used per your preference. My toolset: - RxJava 2 - Dagger 2 - Retrofit 2 - Realm - Glide/Picasso/Fresco - JUnit/Espresso/Mockito KML integrations experience: - Maps JavaScript API using KML and GeoRSS data formats for displaying geographic information
- Displaying data formats on a map using a KmlLayer object, whose constructor takes the URL of a publicly accessible KML or GeoRSS file to display - Cache KML files to reduce the load on your servers Face mapping Technology: - Face recognition data to identify and verify - Facial biometrics, a 2D or 3D sensor "captures" a face. It then transforms it into digital data by applying an algorithm - Face detection and face match processes for verification/identification BLE and WiFi integration Experience : Experience in integrating IoT & BLE Protocol devices following high-level ACE 128-bit encryption & OAuth2 in different industries like health and wellness by integrating iWatch for session tracking and notification purpose. - BLE and WIFI enabled OBD 2 Device - BLE and WIFI Printers integration via SDKs and API - IoT Devices with BLE support - Encryption and Decryption using PKI Key - Experience specifically with Arduino UNO, NodeMCU ESP8266, and ESP32 boards - Fitness band integration - smartwatch (Apple and Android) Chat/Messaging Expert: - Experience in developing chat/messaging-based platforms ranging from XMPP to Rocket chat, Socket.io, Jitsi, Signal R, and integrating the third party like Firebase/Twilio and quickblox - Encryption and Decryption techniques for the secure messaging platform - Handle Large User databases with offline features and online syncing behavior Latest : - COVID Vaccination booking, certificate tracking, available slots - COVID-19 tracking App using BLE and real-time tracking of quarantine patients - COVID-19 prescreening/Symptom checker - Telehealth portal: Video conferencing using tools like Zoom, Vidyo.IO Sharing a few of our tech-core skill sets and responsibilities: - Follows OOPS-based architecture with the use of Classes/Structures and inheritance wherever required. - Authentication via Email and social accounts via native frameworks - Various payment gateway: Stripe, Brain tree, Apple Pay, etc - Experienced in code versioning tools, such as Git & CI/CD tools like Jenkins/Git Lab CI - BLE integration using various SDK and API integration - Well-versed in the use of Jira, Confluence, and other collaboration tools Strict time reporting - Push Notifications: firebase and pub nub Thank you for taking the time to look over my profile and let’s build something great together! Available 40+ hours/week

Experienced iOS and HYBRID application Developer with a demonstrated history of working in the information technology and services industry. Skilled in SQLite, iOS Development, Core Data, Objective-C, Swift and Flutter. A passionate programmer who believes in deliver the best at all levels. I've discovered my strength in mobility hence moving aggressively towards it. Expertises:- Swift, rxSwift ObjC, Flutter, Dart, rDart, MVVM, MVC, Bloc design pattern, RestFul apis, Web-services, Real-Time protocol integration (MQTT, Agora, PubNub), Agile Methodology, Third party SDK integration, Notifications (Local and remote notification), Task management (Jira, Trello), Code management (Bitbucket, Github, Gitlab), Remote work, Socket programming, Unit Testing , App Store and Play store process.

Hello! I'm Christopher Straight, a seasoned Senior Software Engineer with over 15 years of experience. I specialize in weaving together integrations with Chatbots, Twilio, SendGrid, E-Commerce systems such as Shopify, CRMs such as Keap & Salesforce, ticketing systems such as Zendesk, and ERPs, tailored to meet unique client needs through complex system design and execution. I also leverage No-Code automation platforms such as Make.com, Zapier, and N8n.io to create business workflow automation solutions. My skills encompass: Software Integration Microservices Architecture Design RESTful API Development Cloud-Native Technologies GPT3.5/4.0 Dall-E-3 API Integrations No-Code Business Workflow Automation through Make.com (Integromat), PipeDream, and n8n. I'm fluent in languages such as Go, Python, Javascript (NodeJS), Coldfusion Script, and PHP Core. My database expertise includes RDBMS: MS SQL Server, MySQL, Postgres, NoSQL, and real-time databases such as RethinkDB. Ready to collaborate? Let's discuss your project and how I can assist you. Reach out to start our journey together in finding a solution for you!

Experienced backend engineer with a strong skill set in Python, Django, and expertise in both server and serverless architectures. Proficient in RDS, DynamoDB, microservices, Elasticsearch integration, and pub-sub systems. Skilled in crafting scalable architectures, RESTful APIs, and resolving complex challenges to ensure top-tier software development and user-focused applications.