Full-stack developer with 6+ years of experience building scalable web and mobile applications. I specialize in creating robust solutions from concept to deployment, with strong expertise in cloud architecture, DevOps automation, and AI-powered features. I've successfully delivered 20+ projects ranging from MVP startups to enterprise-level applications, consistently helping clients solve complex technical challenges and scale their businesses. What I bring to your project: End-to-end development expertise (frontend, backend, infrastructure) Solution architecture for complex business requirements Deep debugging skills that save time and money Clear communication and proactive project planning Frontend Development React.js (Redux, Context API, Hooks, Next.js) Vue.js (Vuex, Nuxt.js, Composition API) Modern JavaScript/TypeScript Responsive UI/UX implementation Performance optimization Backend Development Node.js (Express, NestJS, Fastify) RESTful APIs & GraphQL Microservices architecture Real-time applications (WebSockets, Socket.io) Database design (PostgreSQL, MongoDB, MySQL, Redis) Cloud & DevOps (AWS Specialist) AWS services: EC2, Lambda, S3, RDS, DynamoDB, CloudFront, API Gateway Infrastructure as Code (Terraform, CloudFormation) CI/CD pipelines (GitHub Actions, GitLab CI, Jenkins) Docker & Kubernetes Monitoring & logging (CloudWatch, ELK Stack) Cost optimization strategies AI & Machine Learning Integration OpenAI GPT integration (ChatGPT, GPT-4, GPT-4 Vision) Python for AI/ML workflows Custom chatbots and AI assistants LangChain, vector databases Prompt engineering & fine-tuning AI-powered features (content generation, analysis, recommendations) Mapping & Geospatial Mapbox GL JS (custom maps, routing, visualization) OSRM (route optimization, distance calculations) Geolocation services Location-based applications GeoJSON data processing Mobile Development React Native (iOS & Android) Flutter (cross-platform apps) App store deployment Push notifications In-app purchases Web Scraping & Data Extraction Python (BeautifulSoup, Scrapy, Selenium) Node.js scraping tools API reverse engineering Data parsing and transformation Automated data collection pipelines Specialized Skills Solution Architecture: Designing scalable systems for complex requirements Project Planning: Breaking down large projects into manageable phases Debugging Expert: Quickly identifying and fixing critical issues Performance Optimization: Database tuning, caching strategies, CDN setup Security: Authentication (JWT, OAuth), data encryption, security best practices

Most teams hire me when manual workflows start breaking under scale — too many tools, too much copy-paste, data that won't stay in sync. I build full-stack SaaS platforms and AI automation that make those problems go away. My recent work spans the full range. For a B2B procurement CRM, I shipped a unified inbox that merges Gmail, Slack, and WhatsApp into one threaded view, plus a Human-in-the-Loop AI quoting engine that turns messy supplier negotiations into structured, versioned PDFs. I also built a real-time IoT operations platform for an EV battery-swap network — a Next.js / React command center over Java Spring Boot microservices, tracking stations, batteries, and swap orders live at high concurrency. On the AI and automation side, I build agent pipelines and n8n workflows that parse documents, orchestrate OpenAI calls, and push results into Google Workspace, Slack, and Twilio. One example: an AI agent that reads a tender PDF, scrapes Google Maps to discover matching vendors, enriches their contact data, and launches a targeted outreach campaign — turning days of manual sourcing into minutes. The foundation comes from Alibaba and Vipshop (NYSE: VIPS), where I built Java/Spring Boot systems handling 100k+ DAU at 99.9% uptime and once cut a procurement batch process from 24+ hours to under 3. I build production-grade from day one — not something you'll have to rewrite in six months. Stack: Java/Spring Boot, Python, Node.js, Next.js, React, PostgreSQL, OpenAI/Claude APIs, RAG, n8n, AWS, Docker. I translate business goals into technical roadmaps, own delivery end to end, and keep you updated daily. If you're building something that has to work reliably at scale, let's talk.

If you're building a SaaS product, SaaS MVP, or want to add AI into your platform, I can help you build a scalable and production-ready system. Hi, I’m Sajeel, a SaaS Developer with 7+ years of experience in full stack development. I help founders and businesses turn ideas into working SaaS products that are ready for real users. I focus on SaaS MVP development, AI integration, and building systems that are stable, scalable, and easy to manage. My goal is to build products that don’t break when users grow. Most clients come to me when they want to launch a SaaS MVP quickly, improve an existing SaaS product, or integrate AI features into their platform. I take full ownership from idea to deployment and make sure everything works as a complete system. As a SaaS Developer, I build full SaaS platforms including dashboards, admin panels, multi-tenant systems, and API-based backends. These systems are designed to scale, so you don’t need to rebuild later. I also work on AI integration inside SaaS products. I use OpenAI, LangChain, and Claude to build AI powered features like chat systems, automation workflows, and smart tools that reduce manual work. A big part of my work is backend systems and automation. I build APIs, connect third-party services, and create workflows that help your product run smoothly. On the frontend, I use React.js and Next.js to build fast and clean interfaces. On the backend, I use Node.js, Nest.js, Express.js, and Python to build scalable systems. I work with PostgreSQL, MongoDB, MySQL, Firebase, and Supabase to manage data properly and ensure performance as your SaaS grows. My approach is simple: build clean, scalable SaaS systems with clear communication and full responsibility. If you are planning to build a SaaS MVP, scale your SaaS product, or integrate AI into your platform, feel free to reach out. I am available and ready to start your project. 𝐂𝐨𝐫𝐞 𝐓𝐞𝐜𝐡 𝐒𝐭𝐚𝐜𝐤 𝐅𝐫𝐨𝐧𝐭𝐞𝐧𝐝: React.js, Next.js, Vue.js, Angular, TypeScript, TailwindCSS, Three.js 𝐁𝐚𝐜𝐤𝐞𝐧𝐝: Node.js, Nest.js, Express.js, Python 𝐃𝐚𝐭𝐚𝐛𝐚𝐬𝐞𝐬: PostgreSQL, MongoDB, MySQL, Firebase, Supabase SaaS Architecture: Multi Tenant Architecture, Role-Based Access Control (RBAC), Authentication (JWT, OAuth), Subscription & Billing Systems, API First Design Payments & Integrations: Stripe, PayPal, REST APIs, Webhooks, Third-Party API Integration 𝐀𝐈 & 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧𝐬: OpenAI API, LangChain, Claude AI, Stripe, Meta API, Google APIs DevOps & Cloud: Docker, AWS, Vercel, CI/CD Pipelines, Nginx, Serverless (AWS Lambda) 𝐎𝐭𝐡𝐞𝐫 𝐓𝐨𝐨𝐥𝐬: FFmpeg, WebRTC, Docker, AWS, Vercel 🔥 Final Keywords (Clean + Ranking Focused) SaaS Developer, SaaS Development, SaaS MVP, SaaS MVP Development, AI Integration, AI SaaS, Full Stack Developer, Automation Systems, API Integration, React.js, Next.js, Node.js, Python, FastAPI, Chrome Extension Development, Workflow Automation, n8n, Zapier, REST API Development, PostgreSQL, MongoDB, Supabase, AWS, Docker, Stripe Integration, Webhooks, Authentication, RBAC, Multi-Tenant SaaS, Scalable Systems, Backend Development

I am a freelance engineer creating modern solutions to diverse product needs, blending data, geospatial and web development. I love making web apps, building interactive map dashboards, and taking digital products from concept to delivery. Services: Web development | Product development | Maps and visualization | Data analysis and GIS | Technical consultation 🤓 Some Highlights • 4+ years of hands-on experience in web development and React • 8+ years of hands-on experience in map creation and GIS • Co-founder and developer of Ptolemy.app, a European digital travel guide app • Published Geo AI research in the International Journal of E-Planning Research • MSc in Geoinformation Tech & Cartography (University of Glasgow, UK) • MEng in Civil Engineering (University of Bristol, UK) • Online GIS specialization by UC Davis ⛳ What You Gain by Working With Me • Technically sound, visually stunning, and easy-to-understand cartography • Ready-to-deploy online and offline maps tailored to your needs • A flexible approach to researching and recommending optimal solutions • Transparent and effective communication throughout our collaboration 👔 Trusted by Diverse Companies I have worked with innovative companies like Addresscloud, SmartHaul, Outdooractive, and Aegis Energy. "An excellent experience working with Nick - very responsive; communicated clearly; suggested good ideas and worked with my imperfect brief to deliver a high-quality mapped product. Highly recommended!" - Aegis Energy 🔧 Tech Stack: React, Next.js, Vue.js, Postgresql, PostGIS (spatial Postgresql), Supabase, Node.js, Express, QGIS, Mapbox, Google Cloud, Leaflet, Open Street Map, MongoDB, Python, FastAPI, Vector Graphics (Inkscape/Illustrator)

Got a maps or geospatial problem? I've likely already built a solution for it. I'm a GIS Full Stack Developer with 10+ years of experience building AI-powered geospatial applications — from satellite-based deforestation detection tools used by agricultural companies for EUDR compliance, to real-time pipeline monitoring dashboards with SCADA integration, to LLM-integrated web GIS platforms. I don't just build maps — I build systems that turn satellite and spatial data into business decisions. What I work with: Web GIS: OpenLayers, MapBox, Leaflet, GeoServer, PostGIS AI/ML: Random Forest, SVM, Gradient Boosting, Deep Learning for satellite imagery ESRI Full Stack: ArcGIS Online, ArcGIS Server, ArcGIS Runtime (.NET, QT), Web AppBuilder Open Source: QGIS, GDAL, GeoPandas, Shapely Backend: Python (Flask/FastAPI), .NET Core, REST APIs Mobile: ArcGIS Runtime Xamarin, QT Recent work includes: Built an automated EUDR compliance tool analyzing satellite imagery for supply chain deforestation risk Developed a live pipeline monitoring dashboard with real-time GIS mapping Created a free web-based GIS editor used by professionals and government agencies globally Integrated locally-run LLM models into an OpenLayers web GIS application I've worked with Bayer Crop Science, IWMI (Sri Lanka), and multiple Upwork clients across oil & gas, agriculture, waste management, and e-governance. If your project involves maps, satellite data, spatial analysis, or location intelligence — let's talk.

I am a software developer specializing in maps and geospatial data. - Map-making and GIS software: QGIS, Mapbox, Mapbox studio - Web development frameworks: React, Django, FastAPI - Programming languages: Python, Javascript, Typescript I use a combination of Typescript and Tailwind CSS for responsive map dashboards and websites. I am passionate about creating web-based software that works across mobile and desktop. I use Python for backend programming and computational tasks. I have experience with - Jupyter notebooks - web scraping - scripting in the QGIS console - data wrangling with scientific Python libraries I have worked with seed stage startups to create their first products and secure funding for their projects. I am passionate about empowering independent businesses and creators to reach their full potential. I have diverse experience as a creator, manager, and developer including - Chef-driven restaurants - Artisan bread making - Wilderness trip leading and management - Sustainable, organic farming - Adventure tourism - Ceramic art and pottery I am an effective, detail-oriented developer with a keen eye for design. I can promise clear communication and thorough work. Thank you for your interest in my profile! Take a look at my portfolio and personal website to see what I've been developing.

--------------------------------------------------------------------------------------------------- 🔰 𝟏𝟎𝟎% Projects Delivered. 200K + Billing 🔰 --------------------------------------------------------------------------------------------------- I have over 15 years of development and implementation experience on projects ranging from small departmental applications through complex enterprise solutions in multi-national corporate environments. My software and application expertise is very diverse and includes Java, J2EE, JSF, JSP/Servlets, and related frameworks and APIs including Spring, Hibernate, Solr, Elastic Search, Kibana, Grails and Groovy, Angular.js, Node.js, Jasper Reports, Amazon Cluster, Mongo DB, DynamoDB, Cognito, Serverless Architecture, Amazon API Gateway, Amazon Lambda, Amazon S3, Redshift, Kinesis, PySpark, Python, Django, Redis, Chargify, Bigdata, Hadoop, Spark, Scala, Machine Learning, Pig, Hive, Ansible, Docker, DevOps, etc. I am not only proficient in technical skill but also possess great knowledge and experience in delivering a broad range of business solutions such as: - CRM - Change & Problem Management - Automotive Vehicle Tune Management - Order Management - Project Management - Warehouse Management - Incident Management - Help Desk - Health Care - Human Resources, etc. Beyond web and mobile application development, I am skilled in high-level requirements gathering, risk analysis, technical design analysis, application modeling, implementation planning, and support.

🌍 GIS and custom geospatial software specialist | 7+ years of experience | 54+ global projects completed I transform cartographic data into clear business value and create custom applications for their seamless operation. I analyze cartographic materials and develop full-featured solutions using Java, Python, and AWS — from crop monitoring tools and NDVI-based dashboards to real-time tracking and route optimization systems. Over the past seven years, I have: * Digitized 153,000 hectares of topographic maps * Processed 35,000 hectares of LiDAR and 800,000 hectares of images from unmanned aerial vehicles * Managed teams of developers who created web, desktop, and mobile GIS solutions that reduce manual operations by 70% What I can do for you 🔧 * Web/mobile applications based on GIS * Platforms for smart farming or AgriTech * Navigation/mapping tools with real-time features * Clean, scalable architecture for spatial data * Post-processing and classification of LiDAR/Mobile LiDAR * Photogrammetry and orthophoto generation * Satellite image analysis * CAD/BIM (2D and 3D models, dimensional drawings) * Custom GIS software development — portals, dashboards, spatial APIs, plugins Why work with me ✅ * All-in-one team: I am supported by a specialized agency of GIS engineers and full-stack developers — scalable resources when you need them. * A set of tools you know: ArcGIS, QGIS, Global Mapper, AutoCAD, Revit, PostGIS, Python, JavaScript, React, Node. * Clear communication: regular demonstrations, documented work processes, no surprises regarding budget or deadlines.

𝐃𝐫𝐢𝐯𝐢𝐧𝐠 𝐈𝐧𝐧𝐨𝐯𝐚𝐭𝐢𝐨𝐧 𝐭𝐡𝐫𝐨𝐮𝐠𝐡 𝐒𝐭𝐫𝐚𝐭𝐞𝐠𝐢𝐜 𝐏𝐥𝐚𝐧𝐧𝐢𝐧𝐠, 𝐀𝐠𝐢𝐥𝐞 𝐏𝐫𝐨𝐝𝐮𝐜𝐭 𝐌𝐚𝐧𝐚𝐠𝐞𝐦𝐞𝐧𝐭 𝐚𝐧𝐝 𝐓𝐚𝐢𝐥𝐨𝐫𝐞𝐝 𝐒𝐨𝐟𝐭𝐰𝐚𝐫𝐞 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 & 𝐀𝐈 𝐒𝐨𝐥𝐮𝐭𝐢𝐨𝐧𝐬 - 𝐃𝐞𝐥𝐢𝐯𝐞𝐫𝐢𝐧𝐠 𝐅𝐮𝐭𝐮𝐫𝐞-𝐑𝐞𝐚𝐝𝐲 𝐄𝐱𝐜𝐞𝐥𝐥𝐞𝐧𝐜𝐞! As a CEO, Product Manager and a Software Engineer with over 20 years of experience in Web and Mobile development, I bring a unique blend of strategic leadership and technical expertise to every project. I lead my team in empowering businesses of all sizes to transform their digital presence, streamline operations and deliver measurable results through innovation. Our solutions are crafted with the future in mind, ensuring your products meet today’s needs while being ready for tomorrow’s challenges. 🌎 Enterprise 💼 AI SaaS 🏀 AI Sports 🏘 AI PropTech 🌐 AI/AR HealthTech 💹 AI FinTech 🤖 AI HRTech 🚚 Logistics CRM/ERP 🍽️ Restaurant businesses With my team, we’ve helped enterprise-level clients achieve significant growth through advanced technology solutions and AI automation and we continue to strive for new heights and lasting impact. We adopt a user-centric approach, ensuring that the needs of the end user are prioritized in every design and development phase. Our UI/UX designers work closely with clients to understand their brand and user requirements, delivering visually captivating and intuitive designs that elevate the user experience. If you're looking for a trusted partner to create future-ready, scalable products that foster growth and innovation, let’s discuss how we can turn your project into a success.

𝗟𝗼𝗼𝗸𝗶𝗻𝗴 𝗳𝗼𝗿 𝗮𝗻 𝗔𝗜 𝗱𝗲𝘃𝗲𝗹𝗼𝗽𝗲𝗿 𝘄𝗵𝗼 𝗮𝗰𝘁𝘂𝗮𝗹𝗹𝘆 𝗳𝗶𝗻𝗶𝘀𝗵𝗲𝘀 𝘁𝗵𝗲 𝗷𝗼𝗯, 𝗻𝗼𝘁 𝘀𝗼𝗺𝗲𝗼𝗻𝗲 𝘄𝗵𝗼 𝗱𝗶𝘀𝗮𝗽𝗽𝗲𝗮𝗿𝘀 𝘄𝗶𝘁𝗵 𝗮 𝗵𝗮𝗹𝗳-𝗯𝘂𝗶𝗹𝘁 𝗰𝗵𝗮𝘁𝗯𝗼𝘁? You're in the right place. I build production-ready AI agents, RAG chatbots, and automation systems for startups, agencies, and ecommerce businesses. The kind that still work on day 100, not just in the demo you saw before paying. Most "AI experts" can wire up a prototype. The hard part is making it survive real users, real data, and real edge cases. That's the part I'm good at. What I build for you: 🤖 AI agents & automation: multi-step workflows, lead qualification, and internal tools that quietly take repetitive work off your team (LangChain, LangGraph, MCP, n8n) 💬 RAG chatbots & assistants: accurate, source-cited answers from your docs, site, or data, so customers get the right answer instead of a confident wrong one 🛒 AI for ecommerce: product-search chatbots plus inventory and ordering automation, validated against a live 300+ product store 📞 AI voice agents: outbound and inbound calling with lead qualification and warm transfer to your reps, built with a compliance gate and 537 passing tests 𝗖𝗹𝗶𝗲𝗻𝘁𝘀 𝘂𝘀𝘂𝗮𝗹𝗹𝘆 𝗰𝗼𝗺𝗲 𝘁𝗼 𝗺𝗲 𝘄𝗵𝗲𝗻: ✅ They have an AI idea but aren't sure what to build first ✅ Their prototype works in a demo but falls apart with real users ✅ They've hired an AI freelancer before and want someone who actually delivers this time ✅ They need an AI feature shipped properly, with tests and clean handoff 𝗠𝘆 𝘀𝘁𝗮𝗰𝗸: Python, FastAPI, React/Next.js, Docker, PostgreSQL, and the LLM tooling that matters: Claude, OpenAI, LangChain, LangGraph, vector databases, MCP, and Vapi for voice. Why clients keep me around: clean architecture, real test discipline, and honest timelines. I tell you what's actually feasible instead of nodding along, and I'd rather kill a weak approach in testing than let it fail in front of your users. I've also published open-source work in this space (the aigovkit SDK on PyPI and a benchmark dataset on Hugging Face), so I hold my own code to a real standard even when no one's checking. If you've got an AI project that needs to work in the real world and not just a screenshot, send me a message about what you're building and I'll tell you honestly whether I'm the right fit.