Software engineer, engineering manager, trainer, and mentor with over 20 years of experience in telecommunications, e-commerce, and game development. More than 5 years of experience leading both co-located and distributed teams. For the past 10 years I have also been teaching Python commercially, from beginner to advanced levels, supporting both individual learners and teams. My professional background covers software development and architecture, project and team management, technical writing, requirements and systems analysis, as well as interviewing, mentoring and teaching. I am comfortable working at both the technical and organizational levels, bridging code and strategy. In recent years I have worked primarily with Clojure, Python, and cloud-native AWS/GCP stacks Also occasionally touched TypeScript/React and Kotlin/Android, and even SAP/ABAP :)

I am a Senior Backend and AI Engineer with over 8 years of experience designing and building scalable backend systems, production APIs, and AI-powered applications for startups and growing SaaS companies. My focus is building reliable backend infrastructure that supports real products in production. I work extensively with Python and FastAPI to design high-performance APIs, integrate AI services, and architect systems that scale as products grow. I have experience building AI-enabled platforms, SaaS backends, data processing systems, and automation services. My approach emphasizes clean architecture, maintainable code, and backend systems that remain stable under real user traffic. Backend Development • Python (FastAPI, Django, Flask) • REST API and GraphQL development • Microservices architecture • Async processing and background workers AI & LLM Integration • OpenAI and LLM API integrations • Retrieval Augmented Generation (RAG) systems • LangChain and LlamaIndex pipelines • Prompt orchestration and AI workflow design Databases • PostgreSQL database design and optimization • Redis caching and queues • MongoDB and document databases • Query optimization and indexing strategies Cloud & Infrastructure • AWS services (EC2, S3, RDS, Lambda) • Docker containerization • CI/CD pipelines • Production deployment and monitoring Types of systems I have built include: • AI-powered SaaS platforms • scalable backend APIs for web and mobile applications • data pipelines and automation platforms • real-time services and backend integrations I enjoy working with founders and engineering teams to design backend systems that are practical, scalable, and ready for production. If you are building a SaaS product, AI application, or backend platform and need a reliable engineer to implement the architecture and core systems, I would be happy to discuss your project.

I am a self-taught developer with industry experience using primarily Clojure with some Python, though I have several years of experience working with LISPs and the Functional Paradigm is my core model for approaching software development. I focus on delivering high quality software and web applications rapidly and efficiently using Clojure and Clojurescript, combining an expressive language with the ubiquity and reach of the Java and JS eco-systems. I have hands on industry experience working on internal software infrastructure, dev ops, and web development, as well as having worked on data integration and automation. Outside of my more concrete technical skills, I have a keen eye for wringing out inefficiencies in systems and implementing processes that are ergonomically adapted to human behaviour. Combined with a honed sense for how to generate the most value, I like to think of these skills as a way I can apply my technical mental rubric to wider domains.

With 18+ years of professional software development experience, I help businesses design, modernize, troubleshoot, and scale complex software systems. Since 2018, I have successfully delivered solutions on Upwork across SaaS platforms, enterprise applications, workflow automation, API integrations, backend systems, and performance optimization. My focus is not just writing code — I help clients solve technical and business problems through architecture, automation, and scalable system design. What I Help Clients With Solution Architecture & Technical Planning SaaS Platform Design (Multi-tenant Systems) Workflow Automation (n8n, APIs, Email & Document Automation) Backend System Design & Optimization Performance Troubleshooting & Root Cause Analysis Legacy System Modernization Database Optimization & Scalability API Integrations & Enterprise Integrations AI-assisted Business Workflows Technical Discovery & Requirements Engineering What Makes Me Different I specialize in solving difficult technical problems that other developers struggle to diagnose. Many clients hire me when they need: architecture guidance, production issue troubleshooting, system redesign, performance optimization, automation strategy, or rescue for complex ongoing projects. I combine architecture-level thinking with hands-on implementation experience. Technologies & Platforms Java, Spring Boot, React.js, Node.js, MariaDB, MySQL, PostgreSQL, REST APIs, Docker, Linux, n8n, Automation Workflows, AWS, Git, Microservices, System Integrations If you need a senior technical partner who can understand business requirements and translate them into scalable technical solutions, let’s discuss your project.

📌 ♛ 𝐓𝐎𝐏-𝐑𝐀𝐓𝐄𝐃 PLUS 𝐖𝐄𝐁𝐒𝐈𝐓𝐄 𝐃𝐄𝐒𝐈𝐆𝐍𝐄𝐑 𝐀𝐍𝐃 𝐃𝐄𝐕𝐄𝐋𝐎𝐏𝐄𝐑📌 ★ 8️⃣8️⃣+ 𝐂𝐎𝐌𝐏𝐋𝐄𝐓𝐄𝐃 𝐉𝐎𝐁𝐒 Hello, my name is Jeena, and I am a full-stack developer with 10+ years of industry experience. I have a proven history of architecting, developing, and deploying full-featured web applications that focus on user experience and performant back-end design. I can manage multiple projects through the software development lifecycle, thrive in challenging environments to meet stringent deadlines, and have a deep passion for mentoring and growing colleagues. ⭐️ Web Application Development Expertise ✅ WordPress Website Development (Custom themes, plugins, performance optimization) ✅ E-Commerce Website Development (Scalable, conversion-focused stores) ✅ WIX Website Development ✅ Squarespace Website Development ✅ Webflow Website Development ✅ Magento Website Development ✅ Magento Enterprise Solutions ✅ WooCommerce Website Development ✅ Shopify Website Development ✅ Shopify Plus Development ✅ MEAN Stack Development (MongoDB, Express, Angular, Node.js) ✅ MERN Stack Development (MongoDB, Express, React, Node.js) ✅ React JS Development ✅ Node.js Development ✅ Laravel Application Development 💎 Website Builders & CMS Platforms | Frameworks - WordPress, Shopify, Squarespace, Wix, Webflow, Weebly, Hubspot, OpenCart, PrestaShop, Magento, Drupal, GoDaddy, Google Sites, Joomla, Kajabi, Sitebuilder, Codeigniter, Laravel, Yii, Cakephp, Zend 💎 Databases - SQLite, Realm Database, MongoDB, MySQL, PostgreSQL, Oracle Database, Firebase Realtime Database 💎 Web Design Deliverables - Prototyping, Mockup, Style Guide, User Flow, Landing Page, Website, Website Redesign, Mobile App Redesign, Email Design, High Fidelity Design, Icon Design, Research Documentation, Sketching, Web Component Design, Wireframing 💎 UX/UI Design Software - Adobe Illustrator, Adobe XD, Adobe Photoshop, Balsamiq, Figma, Sketch, InVision 💎 UI/UX Design - Mobile App Design, Software Design, Web Design, Interaction Design, Adaptive Web Design, Button Design, Custom Web Design, Game UI/UX Design, GUI Design, High Fidelity Design, Human-Centered Design, Icon Design, Mobile UI Design, Navigation System Design, Responsive Design, User Experience Design, User Interface Design, User-Centered Design, Web Component Design 💎 Front-End Development Skills - Adobe Photoshop, Google Analytics, .NET Framework, Angular, AngularJS, Bootstrap, Git, jQuery, React, Vue.js, WordPress, Node.js, SaaS, AJAX, AWS Amplify, Backbone.js, Bitbucket, BootstrapVue, Docker, Kubernetes, Next.js 💎 Ecommerce Platforms - Magento, Squarespace, Wix, WordPress, Shopify, WooCommerce, BigCommerce, Elementor, Weebly 💎 Back-End Development Skills - API, Database, Database Architecture, Database Design, Database Maintenance, Software Architecture & Design, Web Service, Business Logic Layer, Data Access Layer, RESTful API, Automated Deployment Pipeline, Back-End Development, Infrastructure as Code, PHP Script, Python Script, Requirements Specification 💎 Back-End Programming Languages - Java, Kotlin, Scala, PHP, Ruby, SQL, TypeScript, Python, C#, C++, Elixir, Apache Groovy, ASP, Clojure, D Language, Dart, Delphi, Erlang, F#, Fluid Hyper Text Markup Language, Golang, GraphQL, Haxe, JADE, Objective-J, Perl, Rust, Transact-SQL, Visual Basic, XQuery, Laravel 💎 Payment Systems - PayPal, Stripe, Braintree, WePay, Worldpay, 2Checkout, Opayo, Payoneer I would be thrilled to discuss your project in further detail, understand your specific requirements, and provide a tailored solution that aligns perfectly with your goals. Best Regards, Jeena 📌 𝗞𝗲𝘆𝘄𝗼𝗿𝗱𝘀: - WordPress Developer, WooCommerce Expert, Custom WordPress Themes - WordPress Plugin Customization, WordPress Performance Optimization - WordPress Security Specialist, and API Integration Expert, Figma to WordPress - WordPress Migration, WordPress Maintenance, WooCommerce Customization - WordPress Theme Customization, E-commerce Solutions, WordPress Speed Optimization - ACF Pro, ACF, ACF Field Group, ACF Option page

🥇 Expert-Vetted | Top Rated Plus Website Designer & Developer 🚀 10+ Years Experience | UX-Focused, High-Performance Websites Hi, I’m Harvinderjeet, a senior web designer and full-stack developer with over a decade of experience building modern, mobile-first websites and scalable web platforms. I specialize in creating visually clean, conversion-focused websites that balance strong UX/UI design with reliable, maintainable code. My background spans design, front-end, and back-end development, allowing me to handle projects end-to-end—from strategy and wireframes to deployment and optimization. I pay close attention to typography, layout, performance, and messaging so your website clearly communicates value and builds trust. ⭐️ Web Application Development Expertise ✅ WordPress Website Development (Custom themes, plugins, performance optimization) ✅ E-Commerce Website Development (Scalable, conversion-focused stores) ✅ WIX Website Development ✅ Squarespace Website Development ✅ Webflow Website Development ✅ Magento Website Development ✅ Magento Enterprise Solutions ✅ WooCommerce Website Development ✅ Shopify Website Development ✅ Shopify Plus Development ✅ MEAN Stack Development (MongoDB, Express, Angular, Node.js) ✅ MERN Stack Development (MongoDB, Express, React, Node.js) ✅ React JS Development ✅ Node.js Development ✅ Laravel Application Development 🔹 Platforms & CMS WordPress, WooCommerce, Shopify, Webflow, Wix, Squarespace, Magento, HubSpot, Joomla, Kajabi 🔹 Web Design & UX UI/UX Design, Wireframes, Prototypes, Landing Pages, Website Redesigns, Design Systems, Responsive & Mobile-First Design 🔹 Front-End & Back-End React, Vue, Next.js, Node.js, PHP, Laravel, REST APIs, MySQL, PostgreSQL, MongoDB, Firebase 🔹 E-Commerce WooCommerce & Shopify development, payment integrations, performance optimization, custom plugins, and secure checkout flows 🔹 SEO & Performance On-page SEO, technical SEO, speed optimization, caching, analytics setup I provide regular updates, transparent communication, and long-term support. If you’re looking for a reliable expert who treats your project like a product—not just a task—I’d be happy to help. — Harvinderjeet 🔑 Keywords: UI Design, User Experience, Infographics design, Logo Design, Responsive Design, Graphics & UI Design, Digital, Clickable prototype, User Flow, Android UI Design, Website, Web Development, UX/UI, Application design, User interface designs, Android and iOS app design, Design Guru, A/B Testing, Web & Mobile Design, Management, Micro Interaction Design, Website Prototyping, iOS guidelines, Logo, UI/UX, Illustrator, User Experience Testing, Branding, eCommerce app design, Wireframe, Head of Design, App, User Experience Design, iPhone UI Design, Tools, Android Design, SaaS, Sketch, Visual Design, Adaptive, UX Research, Interaction Design, Android app design, Graphics, User Experience, Animations creation, Effective, UX design, Project Management, Long term, Website Redesign, iPad Design, Adobe XD, Search, Mock-up, Visual Communication, Journey Mapping, User Experience Design, Design Expert, Creative, Responsive Web Design, Design Thinking, UI, Agency, User Experience Testing, website design, pitch deck presentation design, iOS and Android guideline, Mobile Design, Productive, User Interface, Application, Usability Testing, Promotion, Redesign, Guidelines, Adobe Illustrator, Android guidelines, UI Research, Wireframing, UI/UX, Android, Design & Usability Research, eCommerce web design, Mobile UX Design, Figma, Art Director, Sketch, Mobile Design, Photoshop, Experience, Competitive Analysis, Identity, User Experience, Webflow, Designer, Design, Logo design, Adobe, Head of Design, UX Wireframe, Wireframes design, Mobile Design, Usability, Solutions, Graphics & UI Design, Responsive Web Design, Web Design, Desktop, Design Prototypes, Creative, Animation UI, Hire, UI Research, User Interface Design, Management, Journey Mapping, Experience Testing, Creative, Team Leader, Application, Graphics, UX & UI, website wireframing, Google Material Design, Mock-up, Redesign.

🚀 𝐖𝐞𝐛𝐬𝐢𝐭𝐞 𝐃𝐞𝐬𝐢𝐠𝐧, 𝐌𝐨𝐛𝐢𝐥𝐞 𝐀𝐩𝐩 𝐃𝐞𝐯𝐞𝐥𝐨𝐩𝐦𝐞𝐧𝐭 & 𝐀𝐈 𝐒𝐨𝐥𝐮𝐭𝐢𝐨𝐧𝐬 𝐄𝐱𝐩𝐞𝐫𝐭 | 𝐖𝐨𝐫𝐝𝐏𝐫𝐞𝐬𝐬 | 𝐒𝐡𝐨𝐩𝐢𝐟𝐲 | 𝐅𝐥𝐮𝐭𝐭𝐞𝐫 | 𝐑𝐞𝐚𝐜𝐭 𝐍𝐚𝐭𝐢𝐯𝐞 | 𝐏𝐇𝐏 | 𝐖𝐞𝐛𝐟𝐥𝐨𝐰 | 𝐖𝐢𝐱 | 𝐀𝐈 𝐈𝐧𝐭𝐞𝐠𝐫𝐚𝐭𝐢𝐨𝐧 Hi, I help startups, small businesses, and growing companies build high-performance websites, mobile apps, SaaS platforms, and AI-powered solutions that are visually appealing, scalable, and optimized for growth. With 10+ years of experience in Website Development, Mobile App Development, Full-Stack Engineering, UI/UX Design, and Artificial Intelligence solutions, I specialize in building modern digital products that improve customer engagement, automate workflows, and drive business growth. 🌐 Website Design & Development Services • Website Design (UI/UX Design) • WordPress Development (Elementor, Custom Themes) • Shopify Store Development • Webflow Development • Wix & Squarespace Websites • Framer Websites • Landing Page Design • Website Redesign & Optimization • Custom Web Applications • eCommerce Development • API Integration & Automation 📱 Mobile App Development Services • iOS & Android App Development • Flutter App Development • React Native Development • Cross-Platform App Development • MVP Development • SaaS Applications • Marketplace Apps • Booking & Scheduling Apps • Healthcare & Fitness Apps • Food Ordering Apps • Logistics & Delivery Apps • Real Estate Apps • Admin Dashboards & Portals 🤖 AI Development & Automation • AI-Powered Web & Mobile Applications • OpenAI / ChatGPT Integration • AI Chatbots & Virtual Assistants • AI Customer Support Systems • AI Content Generation • AI Workflow Automation • AI Knowledge Base Solutions • Document Processing & OCR • AI Search & Recommendation Systems • AI Analytics & Reporting • Voice AI Integration • Custom AI Agents • LLM-Powered Applications • Business Process Automation 💻 Technologies & Platforms Website Platforms: WordPress • Shopify • Webflow • Wix • Squarespace • Framer Frontend: HTML5 • CSS3 • JavaScript • React • Next.js • TypeScript Backend: Node.js • PHP • Laravel • Express.js • REST API • GraphQL Mobile: Flutter • React Native • Firebase • Supabase AI & Automation: OpenAI • ChatGPT • Claude AI • Gemini • LangChain • AI Agents • Prompt Engineering • RAG Systems Database: MySQL • PostgreSQL • MongoDB • Firebase Firestore Design: Figma • Adobe XD • UI/UX Design • Wireframing • Prototyping 🎯 Industries Served E-commerce • SaaS • Healthcare • Education Real Estate • Construction • Travel & Tourism Finance • Logistics • Marketplace Platforms Legal Tech • Fitness • Professional Services Startups • Local Businesses • Enterprise Solutions ⭐ Why Clients Hire Me ✔ 10+ Years of Development Experience ✔ Website, Mobile App & AI Expertise ✔ Full-Stack Development Capabilities ✔ Modern UI/UX Design Skills ✔ Scalable Architecture & Clean Code ✔ AI Automation & Business Optimization ✔ SEO-Friendly & Conversion-Focused Solutions ✔ Reliable Communication & On-Time Delivery Whether you need a business website, eCommerce platform, mobile app, SaaS product, AI chatbot, marketplace, CRM, automation workflow, or custom AI-powered solution, I can help transform your vision into a successful digital product. 📩 Let's discuss your project and build something exceptional together. Thanks, Puneesh

🟢 Available Now! 🏆 I'm a Top-Rated full-stack developer with 12 years of experience, proficient in a diverse array of technologies, frameworks and AI Workflow automation. 🔥 Also, I would like to join any RUST-involved project as middle developer and minimal rate of $10/hr (I need commercial Rust experience). Currently I'm specializing in Ruby on Rails/Ruby, Python/FastAPI/Flask, JavaScript/TypeScript, Datastar/htmx/stimulus (hypermedia), React/Vue.js, Next.js/Nuxt.js, PostgreSQL, containers and n8n workflows. Proven track record in building and scaling complex web applications using best practices. Strong background in CI/CD, infrastructure management/automation, and cloud deployments. Available for full-time or contract roles. ⚠️️ Choose my specialization in menu and find out more 💼 Over 4000 work hours logged on Upwork and a long list of happy long-term clients. --- 🤝 INDUSTRIES SERVED LONG-TERM - High-load IoT company (realtime microservices) - Healthcare company (medical cards storing and processing) - Virtual mobile operator (realtime microservices) - Logistics company - Car sell service (parsing car sale listings) - Music application backend - Tens of corporate websites (web design, implementation) using various stacks --- 👨‍💻 LANGUAGES - Daily: Ruby, Python, Rust, TypeScript, PL/pgSQL, *sh - Exotic: Elm (underrated gem), Clojure, Haskell, Lua 🐍 PYTHON Frameworks: - FastAPI - FastHTML - Flask Main libs: - asyncpg, AlchemySQL (Core/ORM) - imageio/Moviepy - most likely anything else you'll throw at me 💎 RUBY Web frameworks: - Rack - Sinatra - Hanami - Grape - Ruby on Rails + Hotwired Main libs: - Warden, Pandit, Devise - DRY-* family - PG+query objects, Sequel, ROM, Arel - PORO (Plain Old Ruby Object) - i.e. anything low-level/lightweight ⚡ JAVASCRIPT/TYPESCRIPT Frameworks in order of preference: - Datastar/htmx (hypermedia) - React/Next.js - Vue.js/Nuxt.js - SvelteK/SvelteKit Main libs: - Drizzle ORM - Polka - Express.js - Auth.js - TypeSpec --- 🗄️ DBs/EVENTS - PostgreSQL (favorite!), Elasticsearch, Redis, MySQL, MongoDB, ClickHouse (noob) - Nats.io - just perfect! 🧩 APIs/SERVICES INTEGRATION - OpenAI (ChatGPT), Twilio/Sendgrid, Stripe, Braintree, Pay.nl, Onomondo, tens of them, actually, I can integrate everything - AWS, Azure, GCP, DigitalOcean - Slack, NewRelic, Jenkins - ...tens of them 🐳 DEVOPS - Hashicorp stack (Nomad, Consul, Vault) - my choice if k8n is overkill for the task - Terraform (just love it!) - Ansible (advanced multi-env configurations) - Grafana, Loki, Prometheus - Docker, Ansible, Packer, Capistrano (but prefer ansistrano), etc. 🛠️ SOFTWARE INSTALLATION - n8n (single/cluster mode) - docker - OpenProject - wireguard (VPN) - CloudFlare tunnels (Zero Trust) - ...lots/any of them ☁️ CLOUDS - Google Cloud Platform (almost everything but ML and BigData tools) - AWS - including autoscaling and load balancers of all types - Heroku - DigitalOcean - Render.com, Railway, Heroku, Vercel, Render.com, Neon, Fly.io - literally any --- ⌛ Available 7 days a week, up to 10 hours a day, at any time you need.

Recent work: - AI Automation - Document Review Product - My existing ComfyUI DiT video generation workflow (LTX-Video 2.3 I2V), which runs on H200. Optimized a native Blackwell (B200, sm_100) implementation of SageAttention specifically mirroring the SageAttention2++ architecture targetting CUDA 12.8+ - Product price analytics using data from Terapack, Pricecharting etc using NLP - Combined SAHI (Slicing Aided Hyper Inference) technique with Yolov5 to detect moving objects - A non-CNN-based motion vector estimator for image deblurring due to motion blur - Deep Learning based Document image processing solution - High Accuracy Face Tracking and face blurring solution Total Experience: +27 years Core Skills: - C/C++ - C# (Unity) - TensorFlow - Python - Flutter & Dart - NodeJS, Flask, Django - MongoDB - Git

Getting things done start to finish, high complexity projects, diverse technologies, performance, reliability and quality. I have a track record of solving difficult problems and delivering complex cross functional software projects, deploying engineering solutions that benefit the entire organization, and defining key technical standards. I build, coach and support stellar teams while being hands-on and fully engaged in technical intricacies. Core specializations: - Complex distributed systems - design, architecture, quality control, maintenance strategies - Identity management, account security, financial compliance, KYC, data privacy - Large systems modernization and refactoring - Operations reliability, high availability/high performance services - Defining organizational standards, mentoring, tech hiring strategies Platforms and environments: - backend and full stack web development - high availability services and applications - cross platform mobile development Technology background: - software development: Java, Scala, Clojure, ClojureScript, Python, JavaScript, Dart, TypeScript, PHP - deployment and maintenance: Linux, FreeBSD, AWS, GCP, Grafana, Prometheus - databases: PostgreSQL, MySQL, Oracle, MongoDB, DynamoDB and others - mobile development: React Native, Flutter, native iOS apps