I’m a Technical Architect & Generative AI Consultant with 13+ years of experience building scalable Web, Mobile, Cloud, and AI-powered systems.
My current focus is on designing and delivering production-ready Generative AI solutions, including RAG pipelines, AI agents, voice AI systems, enterprise data ingestion, LLM orchestration, evaluations, guardrails, and observability.
I’ve worked across Healthcare, EdTech, Legal, Enterprise SaaS, Networking, and Industrial domains, helping teams move from idea and architecture to implementation and production.
Some of the solutions I’ve worked on include:
- Production Voice AI agents with real-time conversations and human handoff
- RAG systems across multiple business domains
- Enterprise document and data ingestion pipelines for AI
- AI-powered legal case analysis systems
- Persona-based AI platforms
- Scalable cloud and microservices architectures
My technical background includes Python, Node.js, TypeScript, React, React Native, Flutter, AWS, Azure, GCP, Docker, Kubernetes, PostgreSQL, MongoDB, Pinecone, ChromaDB, LangChain, CrewAI, LangGraph, and LlamaIndex.
I can help you with:
- Generative AI and RAG architecture
- AI agents and agentic workflows
- Voice AI solutions
- AI integration into existing products
- Technical architecture and scalability reviews
- MVP and POC design
- Cloud-native backend systems
- Fractional CTO / technical consulting
I combine hands-on engineering with architecture and business thinking, so I can help not only with how to build a solution, but also with choosing the right approach, reducing unnecessary complexity, and making sure it can operate reliably in production.
Generative AI
AI Agent Development
Large Language Model
Retrieval Augmented Generation
Solution Architecture
DevOps
Vector Database
LangChain
Cloud Architecture
Amazon Web Services
Google Cloud Platform
Python
Node.js
React
MongoDB
Chatbot Development
Docker
AWS Amplify
Next.js
Angular
Kubernetes
Microsoft Bot Framework
JavaScript
Web Application
Rancher
Golang
Microservice
Pinky A.
Vadodara, India
$35/hr
5.0
21 jobs
I build mobile apps that scale, retain users, and generate revenue not just apps that ship.
I'm proud to be part of Toptal's Top 3% developer network, and one of the production apps I've worked on has surpassed **5M+ downloads**. I have hands-on experience in app monetization, performance optimization, Play Store/App Store releases, and building reliable mobile experiences at scale.
I'm also an active member of the developer community with **5,449 Stack Overflow reputation** and **280+ answers**, where I enjoy helping developers solve real-world engineering challenges.
With **10+ years of experience**, I've built mobile applications across **Android, Flutter, iOS, React Native, Kotlin Multiplatform (KMP), BLE, IoT, and POS solutions**. I've delivered banking applications, healthcare platforms, AI-powered products, wearable and connected-device solutions, POS and payment applications, video streaming platforms, chat systems, and enterprise applications used by thousands to millions of users.
Beyond mobile development, I specialize in **Bluetooth Low Energy (BLE)** communication, wearable device integration, companion apps, IoT connectivity, firmware-to-mobile communication, real-time data synchronization, offline-first architectures, OTA firmware update workflows, secure device provisioning, and **POS terminal integration**, including payment workflows and peripheral device connectivity.
## WHAT I BUILD
✓ Android Apps (Kotlin, Java, Jetpack Compose)
✓ Flutter Apps
✓ iOS Apps (Swift, SwiftUI)
✓ React Native Apps
✓ Kotlin Multiplatform (KMP)
✓ BLE & IoT Applications
✓ Wearable & Connected Device Solutions
✓ POS & Payment Applications
✓ Companion Apps for Smart Devices
✓ AI-Powered Mobile Applications
✓ Chat, Messaging & WebRTC Video Calling
✓ Fintech & Banking Solutions
✓ Healthcare & Telemedicine Apps
✓ OTT & Video Streaming Platforms
✓ SaaS & Enterprise Applications
## BLE, IoT & POS EXPERTISE
✓ Bluetooth Low Energy (BLE) Communication
✓ GATT Services & Characteristics
✓ Device Pairing & Provisioning
✓ Wearable Device Integration
✓ Smart Home & Connected Devices
✓ POS Terminal Integration
✓ Payment Device Connectivity
✓ BLE Reconnection Strategies
✓ Background Synchronization
✓ OTA Firmware Updates (FOTA)
✓ Sensor Data Processing
✓ Real-Time Device Communication
## MONETIZATION & DEPLOYMENT
✓ App Monetization Strategy (AdMob, Ad Revenue Optimization)
✓ App Store & Play Store Release Support
✓ CI/CD & Release Management
✓ Performance Optimization for High-Download, High-Retention Apps
## TECH STACK
Kotlin • Jetpack Compose • Flutter • Swift • SwiftUI • React Native • Kotlin Multiplatform • BLE • IoT • POS • WebRTC • Firebase • GraphQL • REST APIs • Supabase • AWS • Room • SQLDelight • Coroutines • Hilt • MVVM • MVI • Clean Architecture
## WHAT CLIENTS GET
✓ Fast Development
✓ Clean, Scalable Architecture
✓ Daily Communication
✓ Long-Term Support
✓ Production-Ready Code
✓ BLE, IoT & POS Integration Expertise
✓ App Store & Play Store Release Support
Whether you need a new mobile app, a senior engineer to rescue a struggling project, build a BLE-enabled wearable solution, integrate connected devices, develop a POS application, or scale an existing product, I can help.
Let's build software that users love and products that stand the test of time.
Flutter
Java
Kotlin
React Native
Swift
SwiftUI
iOS Development
FlutterFlow
Firebase
Mobile App
Payment Gateway
TypeScript
JavaScript
Georeferencing
Bluetooth LE
Android SDK
Mobile App Development
Camera
In-App Purchases
UI/UX Prototyping
Hardik M.
Vadodara, India
$50/hr
5.0
61 jobs
Claude Partner - AI enabler | Principal architect & engineer
Hello and welcome,
I’m Hardik Mistry, a former Microsoft MVP with 15+ years of experience designing, scaling, and securing AI-powered and cloud-native systems for startups and Fortune 500 companies.
I specialize in helping organizations adopt AI responsibly, modernize infrastructure, and optimize costs while ensuring performance, reliability, and security. From building real-time data platforms to deploying LLM-powered applications, my mission is simple: deliver solutions that scale and generate measurable business impact.
WHAT I DELIVER
• AI-Powered Systems → Chatbots, copilots, and enterprise AI agents using Azure OpenAI, Cognitive Services, and custom LLMs
• Cloud Architecture at Scale → High availability (HA/DR), containerization, multi-region deployments, and cloud migrations
• Performance Engineering → Low-latency backend design handling 100K+ concurrent users
• DevSecOps Enablement → Tooling, automation, and security for engineering teams of any size
• FinOps & Cost Optimization → Helping enterprises cut cloud spend without sacrificing performance
INDUSTRIES SERVED
FinTech, Healthcare, eCommerce & Retail, EdTech, Fashion, Customer Support Platforms
TECH STACK EXPERTISE
• Cloud & AI: Microsoft Azure, Azure OpenAI, Cognitive Services, AWS (intermediate)
• Architecture: HA/DR, Cloud Migration, Multi-tenant SaaS, Event-driven systems
• Engineering: C# .NET, Node.js, Dapr, APIs, IoT, Xamarin, MAUI
• Data & Monitoring: ElasticSearch + Kibana, Prometheus, Azure AppInsights
• DevOps & Security: Azure DevOps, GitHub Actions, Container Apps, Azure Defender
HIGHLIGHT PROJECTS
• AI Chatbot for a top lending company in Australia (Azure Cognitive Services + OpenAI)
• Real-time IoT Data Pipeline with less than 200ms latency into Azure
• EV Charging Backend built on OCPI protocols
• Boosted productivity for 40+ engineers by driving DevOps adoption on Azure
• Architected a SaaS customer support/sales tool (similar to ZenDesk/Pipedrive)
• Performance engineering for scalable backend serving 100K+ concurrent users
• Implemented enterprise HA/DR strategies ensuring SLA compliance
WHY CLIENTS HIRE ME
• Proven track record with Fortune 500 companies and high-growth startups
• Unique blend of AI expertise, cloud architecture, and enterprise engineering
• Ability to translate technical complexity into business outcomes
• Hands-on mentorship and leadership for engineering teams
If you’re looking to scale AI initiatives, modernize cloud infrastructure, or reduce cloud costs while improving performance — let’s connect. I typically respond within 24 hours.
Project Management
Solution Architecture
Cloud Management
Microsoft Azure
C#
Azure DevOps
Xamarin
Product Management
API
Microsoft Azure SQL Database
Azure DevOps Server
CI/CD
Jayprakash J.
Vadodara, India
$30/hr
5.0
1 jobs
👨💻 Full-Stack Developer | Laravel & WordPress Expert | 14+ Years of Experience
I am a seasoned full-stack developer with over 14 years of experience in crafting scalable, high-performance web solutions. My expertise lies in Laravel and WordPress, where I excel at building robust, user-centric applications and custom solutions that drive results.
🌟 What I Bring to the Table:
🔌 WordPress Plugin & Theme Customization: As a WordPress expert, I specialize in creating and customizing plugins and themes to meet your exact needs. From building custom plugins to tailoring themes for optimal performance and aesthetics, I ensure your WordPress site stands out and functions flawlessly.
🔧 Advanced Laravel Development: With deep expertise in Laravel, I develop complex web applications that are secure, scalable, and efficient. I am proficient in building RESTful APIs, implementing intricate business logic, and optimizing performance to handle large-scale operations.
🎨 Modern Frontend Technologies: Proficient in Vue.js and React.js, I create responsive, component-based frontend architectures that deliver seamless user experiences, perfectly complementing the powerful backends I develop.
🗄️ Database Management: Expert in MySQL, focusing on query optimization, database design, and efficient data handling to ensure your application performs well, even under high traffic.
🚀 DevOps and Deployment: I am skilled in deploying and managing Laravel and WordPress applications on Ubuntu/Linux servers. I use CI/CD pipelines, Docker, and cloud platforms to guarantee reliable and scalable deployments.
💼 Proven Track Record:
Throughout my career, I have successfully delivered projects for 50+ clients, ranging from innovative startups to established enterprises. My commitment to clean, maintainable code and best practices in software development ensures that every project is built to be secure, scalable, and easy to maintain.
🔗 Let's Connect & Discuss how my Laravel and WordPress expertise can drive your next project to success! 🚀
Laravel
PHP
MySQL
React
Vue.js
WordPress
WooCommerce
Imtiyazkhan S.
Vadodara, India
$15/hr
5.0
8 jobs
Senior Software Engineer | Full Stack Developer | Python & .NET | Web Scraping & Automation
Senior Software Engineer with 9+ years of experience in software development, specializing in .NET, Python, Web Scraping, Data Mining, Automation, and Web APIs. Experienced in building scalable and reliable applications using ASP.NET Core, MVC, .NET Framework, Python, Playwright, Selenium, Scrapy, React, and Next.js.
Strong expertise in SQL Server, MySQL, PostgreSQL, REST APIs, AWS, Chrome Extensions, Google Apps Script, Clean Architecture, CQRS, and Microservices.
I enjoy solving complex problems, taking ownership of projects, and delivering high-quality, efficient, and maintainable solutions with clear communication and quick response.
Currently open to collaboration, joining development teams, part-time opportunities, and freelance/contract work as a Full Stack Developer using Python or .NET.
Key Skills:
.NET Core • ASP.NET Core • C# • Python • Web Scraping • Playwright • Selenium • Scrapy • React • Next.js • REST APIs • SQL Server • PostgreSQL • MySQL • AWS • Automation • Chrome Extensions • Google Apps Script
What you can expect:
✅ 9+ years of professional experience
🎯 High-quality & reliable development
💡 Smart technical solutions to reduce cost and improve results
🤝 Strong ownership & communication
⚡ Quick response and dependable delivery
Python
Web Scraping
Data Scraping
Beautiful Soup
Selenium WebDriver
Python Script
Automation
C#
JavaScript
jQuery
Google Chrome Extension
Node.js
React
Lead Generation
Web API
Pushpak S.
Vadodara, India
$15/hr
4.9
153 jobs
╔══════════════════════════════════════╗
🤖 AI-POWERED FULL-STACK ENGINEER
⚡ Agentic Systems • LLM Integration • Scalable Products
╚══════════════════════════════════════╝
👉 KEY FACTS:
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
🏆 Top Rated Plus Upwork Freelancer
💎 8+ Years of Professional Full-Stack Development
🚀 115+ Upwork Projects Accomplished
🕰️ 13,000+ Total Working Hours
🏗️ 6+ Startups → Scratch → MVP → Multimillion $ Business
⭐ 5-Star Reviews from Clients — Every Single Time
🎯 End-to-End Support → Ideation to Production
💪 100k+ Visitors/Month on Platforms I Built
📡 99.6% Uptime Achieved → Pushing to 99.9%
🌟 Open Source Enthusiast & Pair Programming Advocate
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
I am a Senior Full-Stack Engineer & AI Systems Builder with 8+ years of hands-on experience including lead developer roles across SaaS, Real Estate, Hospitality, HR, Finance, and E-Commerce. I don't just write code , I architect products that scale and deliver real business outcomes.
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
🤖 AI & AGENTIC WORKFLOW EXPERTISE
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
🧠 Agentic AI Systems → Autonomous agents, task planners, tool-use loops
🔗 Multi-Agent Workflows → Orchestration, coordination & memory systems
⚡ OpenAI GPT-4o → Assistants API, fine-tuning, embeddings
🎭 Claude (Anthropic) → Advanced prompting, tool use, vision
🔧 Custom AI Agents → End-to-end automation pipelines
🖼️ ComfyUI Workflows → Image & video model training
🛠️ Custom ML Pipelines → Design, train, deploy at scale
☁️ Scalable AI APIs → Production-grade, fault-tolerant
🏥 HIPAA-Compliant AI Apps → Healthcare-grade security
🐍 Python → AI/ML scripting & data pipelines
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
⚙️ CORE TECHNICAL STACK
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
🎨 FRONTEND
→ React, TypeScript, React Native (Mobile)
→ HTML5, CSS3, SASS / SCSS / LESS
🖥️ BACKEND
→ NodeJS → Express, NestJS, AdonisJS, SailsJS
→ AWS Lambda → Serverless & event-driven architectures
→ Socket IO → Real-time systems
→ GraphQL / REST / JSON-RPC
☁️ CLOUD & DEVOPS
→ Amazon AWS, Google Cloud Platform (GCP)
→ Docker → Containerization & orchestration
→ Elastic Load Balancing, CDN, Scalable deployments
🗄️ DATABASES & SEARCH
→ PostgreSQL, MySQL, MongoDB
→ Elasticsearch, Sphinx Search, AWS CloudSearch
📊 DATA & ANALYTICS
→ Power BI → Dashboards & business intelligence
→ Webpack, GULP, GRUNT
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
🏢 INDUSTRIES SERVED
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
✅ SaaS ✅ Real Estate ✅ Hospitality
✅ HR Tech ✅ FinTech ✅ E-Commerce
✅ HealthTech
━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━
🎓 LEADERSHIP & COLLABORATION
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📋 Code Reviews & Merge Request Management
👥 Team Mentoring & Technical Guidance
🔬 Research & Architecture Advisory
🤝 Pair Programming & Open Source Contributions
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💬 Feel free to reach out with any proposals or questions!
🚀 Let's build something remarkable together.
Web Application
ChatGPT
Node.js
JavaScript
Next.js
React
MySQL
React Bootstrap
ExpressJS
NestJS
AWS Lambda
Serverless Computing
API
SaaS Development
Azure OpenAI Service
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