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Full Stack Developer with 6+ years building production SaaS platforms, booking systems, CRM tools, and AI-integrated applications, end-to-end, from React/Next.js frontends, Nest.js/Node.js/FastAPI backend to the AWS infrastructure they run on. Recent work: → Leading full-stack architecture at Bingo Labs — owning cloud infrastructure, AI automation workflows, and the full product delivery cycle → Built multi-tenant SaaS CRM with RBAC, Stripe billing, and AWS-hosted infrastructure serving 200+ tenants from MVP to production → Delivered booking systems, real-time dashboards, and AI-integrated apps using LangChain, LangGraph, Claude, and OpenAI APIs → Designed and shipped CI/CD pipelines, Docker/Kubernetes deployments, and GitHub Actions workflows from scratch I'm not a developer who's "familiar with AWS" — I architect and operate it professionally. 9 AWS certifications (Solutions Architect, Developer, ML Engineer, Data Engineer, CloudOps) and 2 Oracle Cloud credentials mean I provision ECS clusters, write CloudFormation, wire Lambda pipelines, and run Terraform without a separate DevOps hire. What I build for clients: → Multi-tenant SaaS platforms with RBAC, real-time dashboards, and drag-and-drop customisation (ReactJS, NextJS) → Scalable REST APIs and microservices (NestJS, Express.js, FastAPI, Django) → High-performance Next.js frontends — Core Web Vitals, SSR/ISR, code splitting → AI-integrated apps: LangChain, LangGraph, OpenAI, Claude APIs → Payment systems: Stripe Connect, Razorpay, Khalti, eSewa → React Native mobile apps (iOS & Android) → Data engineering and ML pipelines (SageMaker, TensorFlow, Keras) Core stack: TypeScript · React · Next.js · NestJS · Node.js · Python · PostgreSQL · MongoDB · Redis · AWS · Docker · Kubernetes · Terraform If you need someone who owns the whole stack — not just a single layer — send me a message. I usually reply within a few hours. — — — — — — — — — — Full stack developer for SaaS platforms, booking systems, CRM tools, and AI applications. I take full stack developer saas builds from MVP to scale, full stack developer fintech work, full stack developer ecommerce platforms, full stack developer healthcare applications, full stack developer marketplace work, and full stack developer CRM integrations. Recent AI work includes full stack developer LLM features (OpenAI, Claude, LangChain, LangGraph) and full stack developer AI prototypes. Stack coverage: full stack developer react next.js, full stack developer nestjs node.js, full stack developer python fastapi django, full stack developer aws cloud, full stack developer docker kubernetes terraform. I handle python full stack developer flask and python full stack developer django engagements. Also .net adjacent full stack developer migrations when needed. I ship as a web developer, React developer, and mobile app developer — covering web developer, React developer, and mobile app developer work from one engagement saves clients two or three hires. I take web developer retainers and React developer contracts. full stack developer, full stack web developer, full stack developer saas, full stack developer fintech, full stack developer ecommerce, full stack developer healthcare, full stack developer crm, full stack developer marketplace, full stack developer ai, full stack developer llm, full stack developer react, full stack developer next.js, full stack developer nestjs, full stack developer aws, full stack developer cloud, python full stack developer, web developer, react developer, mobile app developer

I turn complex system requirements and scattered third-party tools into reliable, scalable software. While I am establishing my presence on Upwork, I bring 5 years of hands-on professional engineering experience building custom backend systems, robust API middleware, and multi-tenant SaaS applications. If you are looking for a developer who understands product goals, cares about fault tolerance, and delivers clean, maintainable code without constant oversight, I can help. Core Expertise & What I Build API Middleware & Custom Integrations: Reliable webhook handlers, event-driven data syncs, and custom API connectors designed for high availability, rate-limiting, and idempotency. SaaS Platforms & Startup MVPs: Multi-tenant architecture, subscription management, customer portals, and admin dashboards. Messaging & AI Workflows: Connecting systems to messaging platforms (WhatsApp, Telegram) and LLM/AI APIs to automate core operations. Business Systems & Automations: Marketplaces, custom CRM integrations, and data pipeline automation to eliminate manual work. Tech Stack Backend & Integrations: REST & GraphQL APIs, Webhooks, System Architecture, Idempotency Systems, Data Transport Protocols Languages & Frameworks: JavaScript/TypeScript, React, Vue.js, Inertia.js, Tailwind CSS, Node.js / PHP / Python Databases & Caching: MySQL, PostgreSQL, Redis Integrations: Stripe & Payment Gateways, WhatsApp / Telegram APIs, CRMs (HubSpot, Salesforce), Email Platforms, AI APIs How I Work Direct, Hands-On Execution: No middle managers or junior hand-offs. You work directly with the engineer building your product. Production-Ready Standards: I build with edge cases in mind—retry mechanisms, error handling, clean documentation, and scalable database schemas. Clear Communication: Regular updates, clear technical explanations, and predictable milestones. Ideal Projects Building or scaling a SaaS platform, MVP, or internal business tool Connecting disparate APIs, payment gateways, CRMs, or messaging bots Fixing fragile webhook handlers, failed data syncs, or slow backend endpoints Have a project in mind? Send me a message with a brief summary of what you are trying to build or integrate, and I'll review it and get back to you with an initial approach.

Founder of thegemstech | SaaS Architect | Full Stack Product Engineer | AI & Scalable System Specialist I help startups, founders, and businesses build scalable digital products designed for real-world growth — not just demo-level applications. Most developers can build features. Very few understand how to build systems that survive real business operations, scaling challenges, performance pressure, and future expansion. That’s where I specialize. I’m a Full Stack Developer with strong experience in: • React.js / Next.js • Node.js / Express.js • MERN Stack • PostgreSQL / MongoDB • SaaS Architecture • AI Integrations • REST APIs • Real-time Systems • Scalable Backend Infrastructure I’ve worked on production-level platforms including: • RestroCash — Restaurant & Hospitality SaaS Platform • GreenMove — Transport & Booking System • AI-powered CMS Platforms • Marketplace & Multi-tenant Systems • Real-time Dashboard Applications My approach is business-first and architecture-first. Before development starts, I focus on: • Scalability • System architecture • Database structure • Performance optimization • Long-term maintainability This helps clients avoid expensive rebuilds and technical debt later. I value clean code, strong communication, reliable execution, and long-term collaboration. If you're building a serious product and need someone who understands both technology and business systems, let’s connect. — Lokendra B. Jargha Founder, thegemstech

👋 Hi, I am an experienced Senior Product & Consultant. Offering comprehensive Product & UX/UI design & research services to creating well crafted products to make people life easier with business alignment. With a focus on clean & simple design. I collaborate with cross-functional team & stakeholders as a bridge to transform business ideas into user-centric digital experiences. My expertise areas are : - Product Design - User Research - Figma Design + Interactive Prototype + Wireframe + Visual Design + Design System - Usability Testing Industries experience: - Adult Industry & Entertainment - Travel - Banking & Finance + Mobile Wallet - Health Do you need help for UI/UX and product design or any UX Consultant? Feel free to send me a message. Thanks for viewing my profile!

I build production-ready web apps, SaaS platforms, dashboards, and AI-powered workflows using React, Next.js, TypeScript, Node.js, Python, PostgreSQL, MongoDB, Supabase, and API integrations. I have 8+ years of experience across frontend, backend, dashboards, automation, scraping/data pipelines, payment/API integrations, and cloud-based product development. I can take a feature from requirements to architecture, implementation, testing, deployment, and long-term maintenance. What I can help you build: • SaaS MVPs and admin dashboards • React / Next.js frontend applications • Backend APIs and business logic • AI/LLM integrations using OpenAI, Gemini, or similar providers • Data dashboards, reporting systems, and analytics views • MongoDB, PostgreSQL, Supabase, and REST API integrations • Scraping, automation, and async data-processing workflows • Bug fixes, refactoring, performance improvements, and production support Recent project examples include: • Codexia — an AI software memory platform that analyzes GitHub pull requests, extracts engineering decisions, stores project memory, and powers a grounded RAG-style chat experience. • Personal Expense Tracker — a full personal finance dashboard with budgeting, analytics, transaction history, reporting, and export-focused workflows. • ImmiHub — a web platform built with clean frontend architecture, responsive UI, and practical user-facing flows. I’m a good fit if you need someone who can own full-stack features end-to-end, communicate clearly, estimate realistically, and build maintainable software instead of quick patches.

Full-Stack SaaS Developer & Tech Lead | 10+ Years in Web Development | Node.js, React.js, MongoDB I have 10+ years of experience as a full-stack developer, working mainly with Node.js, React.js, and MongoDB. I focus on building SaaS platforms, including eCommerce systems, project management tools, logistics software, and web scraping solutions. I’ve led multiple projects, making sure they run smoothly and scale well. I also work with data analytics and web scraping to gather data for business needs. I use tools like Jira and Monday for project management and have handled various development tasks across the full stack. Key Skills: Full-stack development with Node.js, React.js, MongoDB. 10+ years of experience in SaaS development. Built eCommerce, project management, and logistics software. Expertise in web scraping and data analytics. Experienced in project management using Jira, Monday, and other tools. I focus on getting practical results and solving complex problems in web development and project management.