⭐⭐⭐⭐⭐ "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.

🥇 Top-Rated Freelancer 🥇 100% Job Success Score 🥇 Developed App with 5 millions+ active user ⭐️ 5+ years of Experience 🎯I'm an Expert Web and Mobile Applications Developer with over 5+ years of experience in developing web and mobile applications. I'm Proficient in creating dynamic user experiences with React.js, Next.js, and React Native. I have a strong background in building scalable and efficient back-end solutions with Node.js and Firebase Stack of technologies: ➕ JavaScript / Typescript ➕ React.js / Next.js / Gatsby (Redux, Zustand, Redux Toolkit); ➕ React Native ➕ HTML / CSS (Tailwind, MaterialUI, Bootstrap, AntDesign); ➕ PWA (Progressive Web App); ➕ MySQL, PostgreSQL, MongoDB ➕ API integrations (Stripe, PayPаl, Twilio, PubNub, Google maps etc.); ➕ API development (Node.js - Express.js, Firebase, ). This stack lets you make Web and Mobile Applications with front-end development alongside with back-end development. This services I provide for FREE: ✅ FREE Project Consulting ✅ FREE Quotation Let's discuss your project and bring your ideas to life!

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

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

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.

I'm a Lead Cybersecurity and DevSecOps Engineer with over 10 years of experience securing and scaling high-performance, distributed systems. My core focus is helping teams build resilient, secure infrastructure—whether it's in the cloud (AWS, Azure, GCP) or on-premise using Kubernetes and OpenStack. I’ve led cross-functional teams delivering applications in Node.js, Go, and Python, always with security top of mind. From infrastructure hardening and secure architecture design to automated compliance and cloud security posture management, I make sure every layer is built to reduce risk and support long-term reliability. I’ve also worked hands-on with distributed storage systems like Ceph and Cinder, and developed custom modules and plugins for Nginx, HAProxy, and Varnish—often to enhance traffic control, observability, or implement security controls like custom WAF logic. Security isn’t just a checkbox for me—it’s embedded into my workflows. I bring strong experience in secrets management, CI/CD security, policy-as-code, and threat modeling, and I enjoy mentoring teams on how to integrate DevSecOps into their development process without slowing them down. If you're looking for someone who can secure your systems without sacrificing performance, and who can lead both strategy and hands-on implementation, I’m here to help.

I build AI-powered tools that solve real business problems — chatbots, automation agents, internal dashboards, and full-stack web apps. With 4+ years in software development and hands-on experience with Claude API, GPT-4, and modern AI frameworks, I help businesses automate repetitive workflows, build intelligent assistants, and ship production-ready web apps fast. What I build: → AI chatbots & virtual assistants (Claude API, OpenAI GPT-4) → Workflow automation agents (n8n, Make, Zapier + AI) → Full-stack web apps with AI features built in → REST API integrations & backend systems → RAG pipelines & document Q&A tools My stack: Python, JavaScript, Ruby on Rails, React, PostgreSQL, AWS, Docker — plus Claude Code for rapid AI development. I delivered a 5-star rated backend project for a SaaS platform in under 2 weeks. I work with clear communication, fast turnarounds, and clean code you can actually maintain. If you need something built that uses AI — message me with what you're trying to automate or build. I'll tell you honestly if I can help.