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I can solve any custom API integration issue that other developers have given up on - from phone door openers to Swiss and American banks, from 1974's nacha technologies to artificial intelligence, crypto and blockchain. I have 22+ years of overall 🌐 Web Development experience, including 18+ years with ⚙️ Custom PHP, 16+ years with 📝 WordPress and 🛠️ API Integration, and 12+ years with 🛍️ eCommerce, along with other related technologies and programming languages. Located in Washington State, I have no problem working 30-40+ hours during American time. I am self-controlled, self-organized, flexible and learnable, I can adapt to whatever your project requires. ================================ 🛠️ API INTEGRATION I offer custom API integration for a wide range of services using the most common REST, SOAP and GraphQL protocols. There is a strong focus on authentication, error handling and personal data security. I have extensive experience working with 1,200,000+ records at a time with regular automatic updates down to the minute. 🛠️ API integration development 🛠️ Data transformation and processing 🛠️ Analytics, reporting and visualization 🛠️ Custom API/feeds development Some API integrations I have experience with: Ahrefs API, Amazon API Gateway, Amazon AWS API, Amazon Lambda API, Amazon PA API, Amazon S3 API, Bank Of America API, Barcode Lookup API, BigCommerce API, BlueBanc API, Brevo API, Bright Data API, ChatGPT API, Cloudflare API, CoinBase API, Detroit Trading API, Dukascopy API, Dynadot API, eBay Product API, Envato API, Ethereum API, Etherscan API, First Data API, Fiserv API, GoDaddy API, Google Places API, HubSpot API, Jobber API, Lead Byte API, Lead Galore API, Lead Horizon API, Lead Prosper API, Leads Hook API, MaxMind API, Meta Marketing API, Modern Dropship API, NameSilo API, NowPayments API, OpenAI API, PayPal API, Plaid API, Polygon API, Polygon Scan API, Quin Stage API, Quin Street API, Relograde API, RiskPay API, Round Sky API, Samsara API, Seamless Chex API, SendGrid API, Shopify API, Slack API, Square API, Stripe API, Supabase API, Tatum API, Thumbtack API, Trulia API, Twilio API, VideoHive API, WhatsApp Cloud API, WooCommerce API, WordPress API, Zillow API, etc... ================================ 🧠 DATA PROCESSING I offer ETL (Extract, Transform, Load) data processing services that include cleaning, transforming, and analyzing data to extract valuable insights. This can involve working with external APIs, large datasets, cloud or database storage. I have extensive experience with tools like PHP, databases and cloud services for efficient processing. 🧠 Data cleaning and transformation 🧠 Real-time data analysis and reporting 🧠 Data files creating and processing 🧠 Artificial intelligence enhancing ================================ ⚙️ MICROSERVICES I offer development of microservices for external project management or communication between different projects. This includes receiving data via API, converting it to the required format, storing it in a database or sending it via API to another service. I have experience working with Amazon, Google, Meta as well as smaller private services. ⚙️ Inbound and outbound API integration ⚙️ Converting one type of API to another type ⚙️ Splitting large queries into multiple queries ⚙️ Automatic processing of requests on schedule ================================ 🛍️ ECOMMERCE I offer product import/export and inventory management for eCommerce stores. This includes working with popular WordPress, Shopify, WooCommerce and BigCommerce as well as external marketplaces such as Amazon, eBay, Google Shopping, etc. I have extensive experience working with 100,000+ inventory processing and synchronization. 🛍️ Inventory management solutions 🛍️ Sales and performance analytics 🛍️ Fraud detection and prevention 🛍️ Marketplaces synchronization ================================ One last thing... there's a reason I have a 100% success score on Upwork. That's because I get it right the first time, or I will work for free until you're happy. Thank you for taking the time to review my profile. Looking forward to connecting with you!

Full Stack Developer | Laravel | PHP | APIs | AI Automation I help startups, businesses, and SaaS companies build modern web applications, automation systems, AI integrations, and scalable backend solutions. I work with Laravel, PHP, JavaScript, Node.js, Python, APIs, Chrome extensions, and AI-powered applications. I can help you with: * Custom web application development * Laravel and PHP backend systems * REST API and third-party integrations * AI chatbot and automation solutions * Chrome extension development * SaaS platforms and dashboards * Ecommerce websites and payment gateways * Automation tools and web scrapers * Mobile app support and integrations Why work with me: * Clean, scalable, and secure code * Fast communication and regular updates * Reliable long-term support * Experience with startups and growing businesses * Focused on performance and user experience Technical Skills: Laravel, PHP, JavaScript, Node.js, Python, MySQL, MongoDB, React.js, Vue.js, Tailwind CSS, OpenAI, ChatGPT, Gemini, Stripe, Twilio, REST APIs, Flutter, Android, iOS Looking forward to working with you. Sanjay Kumar Full Stack Developer | Software Engineer

Senior Full-Stack Developer with 13+ years of experience building scalable, secure, and high-performance software for enterprises and fast-moving startups. I specialize in backend-heavy systems, cloud architecture, and complex integrations where reliability, performance, and clean design matter. I have delivered production systems for global organizations including the United Nations, enterprise platforms, and SaaS startups across AI, finance, identity, telecom, and e-commerce. 🚀 Proven Impact • Built large-scale linguistic platforms for the United Nations used by translators and editors worldwide • Created an Azure Marketplace Managed Application that automates employee lifecycle management by syncing ADP data to Microsoft Entra ID • Developed high-volume APIs, SDKs, and webhook systems used across multiple regions • Delivered complex OAuth, SSO, payment, VOIP, and third-party integrations • Improved performance, scalability, and reliability of existing systems under real production load 🧠 Core Strengths • Backend Engineering, .NET, Node.js, Python, Go • API Design, REST, GraphQL, SOAP, OAuth, Webhooks, Microservices • Cloud & DevOps, Azure, AWS, GCP, Docker, Kubernetes, CI/CD • Databases, SQL Server, PostgreSQL, MySQL, MongoDB • Enterprise Integrations, Identity, Automation, AI-powered workflows 💼 How I Work • Strong ownership mindset, I treat your product like my own • Clear communication, proactive updates, no surprises • Production-ready code with long-term maintainability in mind • Comfortable working independently or with distributed teams If you need a senior engineer who can take complex requirements and turn them into stable, scalable solutions, I am ready to help. Let’s build something solid.

🌐🚀 MVP / SAAS Specialist Expertise in | AI Developer | RAG | LLM | AI Integration | Python | OpenAI API Integration | Artificial intelligence | Machine Learning | Langchain | Django React JavaScript | FastAPI | AI agent | AI App Development | AI bot | AI chatbot | AI Agent | Restful API | PostgresSQL | Botpress | PostHog | MCP Server | Multi-Agents/Multiple Agents | Voice AI 🔑 𝐈 𝐛𝐮𝐢𝐥𝐝 𝐚𝐧𝐝 𝐝𝐞𝐩𝐥𝐨𝐲 𝐜𝐮𝐬𝐭𝐨𝐦 𝐰𝐞𝐛 𝐚𝐩𝐩𝐥𝐢𝐜𝐚𝐭𝐢𝐨𝐧𝐬, AI-Powered MVP, AI Healthcare Tools, AI Writing Tool, GPT Clone, Full Stack Application, Multi-Tenant 𝐚𝐧𝐝 𝐢𝐧𝐧𝐨𝐯𝐚𝐭𝐢𝐯𝐞 𝐀𝐈 𝐬𝐲𝐬𝐭𝐞𝐦𝐬 𝐭𝐡𝐚𝐭 𝐬𝐨𝐥𝐯𝐞 𝐜𝐨𝐦𝐩𝐥𝐞𝐱 𝐩𝐫𝐨𝐛𝐥𝐞𝐦𝐬, 𝐜𝐫𝐞𝐚𝐭𝐞 𝐧𝐞𝐰 𝐯𝐚𝐥𝐮𝐞, 𝐚𝐧𝐝 𝐢𝐦𝐩𝐫𝐨𝐯𝐞 𝐮𝐬𝐞𝐫 𝐞𝐱𝐩𝐞𝐫𝐢𝐞𝐧𝐜𝐞𝐬. 🎁 A 100% refund, if I'm unable to meet our agreed commitments. No questions asked! 𝐊𝐞𝐲 𝐅𝐚𝐜𝐭𝐬: 🧑‍💻 8+ years of experience as a Full Stack Developer and Artificial Intelligence Specialist 🚀 50+ market-winning projects launched ⌛ Around 600 hours on Upwork 🎯 Top-Rated on Upwork 🌉𝐈'𝐯𝐞 𝐬𝐨𝐥𝐯𝐞𝐝 𝐞𝐧𝐠𝐢𝐧𝐞𝐞𝐫𝐢𝐧𝐠 𝐩𝐫𝐨𝐛𝐥𝐞𝐦𝐬 𝐟𝐨𝐫 𝐭𝐨𝐩 𝐜𝐨𝐦𝐩𝐚𝐧𝐢𝐞𝐬 𝐚𝐧𝐝 𝐬𝐭𝐚𝐫𝐭𝐮𝐩𝐬 𝐚𝐫𝐨𝐮𝐧𝐝 𝐭𝐡𝐞 𝐠𝐥𝐨𝐛𝐞 ☑️ Under Armour ☑️ Snowflake ☑️ Estateza ☑️ SearchLook ☑️ Sparrowcharts 💡 𝐖𝐡𝐚𝐭 𝐜𝐚𝐧 𝐈 𝐛𝐫𝐢𝐧𝐠 𝐭𝐨 𝐲𝐨𝐮𝐫 𝐭𝐚𝐛𝐥𝐞? ☑️ Full Stack Development for robust and scalable web applications, including both front-end and back-end technologies ☑️ Custom Web and Application Development utilizing frameworks like Python, React, Django, React.js / Angular / Next.js / Nest / Nust / Golang and Node.js ☑️ Expertise in LLMs and ChatGPT integration to enhance application functionalities ☑️ Proficiency in RESTful APIs, GraphQL, and database management ☑️ Experience with cloud services like AWS, Azure, and Google Cloud for deployment and scaling ☑️ Strong problem-solving skills and ability to optimize user experiences and application performance 🌟𝐇𝐞𝐫𝐞'𝐬 𝐰𝐡𝐚𝐭 𝐂𝐥𝐢𝐞𝐧𝐭𝐬 𝐡𝐚𝐯𝐞 𝐭𝐨 𝐬𝐚𝐲 𝐚𝐛𝐨𝐮𝐭 𝐦𝐞: 🌟 Ali Hamza is in the top tier of software developers and data engineers. He is far more than an implementer; he is a strong architect. During this project set, Usama worked on data from major US corporations 🌟 One of the best developers I have ever worked with. He is always on time and does exactly what he says he will do. I could not recommend him enough. 🎯 𝐈 𝐩𝐨𝐬𝐬𝐞𝐬 𝐞𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞 𝐢𝐧 𝐭𝐡𝐞 𝐟𝐨𝐥𝐥𝐨𝐰𝐢𝐧𝐠 𝐝𝐨𝐦𝐚𝐢𝐧𝐬 ☑️ Full Stack Development: ☑️ Backend: ☑️ Python ☑️ Django ☑️ Flask ☑️ NodeJs, Express.js ☑️ Rest API, SOAP ☑️ Websocket ☑️ Third party integration ☑️ Frontend: ☑️ Html5, Css3, Bootstrap ☑️ Javascript ☑️ ReactJs, Angular ☑️ VueJs ☑️ NextJs, NuxtJs ☑️ Ajax, JSON, XML, XHTML, SVG, Canvas ☑️ API integration, OpenAI API ☑️ DevOps: ☑️ CI/CD Pipelines ☑️ IaC ☑️ Docker ☑️ Kubernetes / Terraform ☑️ Elasticsearch ☑️ Cloud Computing (Azure, AWS, Google Cloud) ☑️ Version Control (Git, GitHub) ☑️ Containerization + Orchestration (Docker, Kubernetes) ☑️ Spring Boot / Java, Microservices Architecture ☑️ Real-time / Streaming / Event-driven architectures ☑️ Session Recordings / Session Replays ☑️ GraphQL / gRPC ☑️ Kafka / Redpanda (real-time streaming) ☑️ Generative Artificial Intelligence (GenAI) ☑️ Large Language Models (LLMs) ☑️ Natural Language Processing (NLP) ☑️ ChatBots and Virtual Assistants ☑️ Text to Image Modelling ☑️ Vector Databases ☑️ Retrieval-Augmented Generation (RAG) ☑️ ChatGPT ☑️ OpenAI ☑️ AI/ML (Artificial Intelligence + Machine Learning) ☑️ Multimodal AI / NLP ☑️ Agentic AI / Autonomous Agents ☑️ “Vibe Coding” / AI-first / prompt-driven dev workflows ☑️ Explainable AI / Ethical, Sustainable AI ☑️ Edge AI / On-device / Federated Learning ☑️ Web Scraping ☑️ Data Extraction ☑️ Data Scraping ☑️ Scrapy ☑️ Selenium ☑️ Beautiful Soup ☑️ Requests ☑️ Deployment and scheduling the scraping scripts on server ☑️ PostHog / Mixpanel / Amplitude / Segment (Twilio Segment) ☑️ OpenTelemetry (Datadog / Grafana / Sentry ☑️ LaunchDarkly / GrowthBook / VWO / Optimizely / Klaviyo ☑️ Airbyte / Fivetran / DBT ☑️ Auth0 / Clerk / SuperTokens / Google Auth ☑️ Stripe / Paddle ☑️ Plaid AI + Analytics Integrations ☑️ LangSmith / LangFuse – Observability and evaluation layer for LLM apps. ☑️ Weaviate / Pinecone / Qdrant – Vector DBs for AI features with analytics hooks. ☑️ Whylabs / Arize AI – ML observability & monitoring (similar to PostHog but for models). I am a Fullstack AI Developer - Python Django, React, Flask, API Integration I can help you to build: ⚡ Fast MVP Development (AI-Powered) ✅ ⚡ AI Powered SAAS Applications ✅ ⚡ AI Agent RAG Systems | AI Chatbots ✅ ⚡ Open AI API Integrations / LLM ✅ ⚡ Full stack Development (AI/ML, Django, React) ✅ ⚡ AI Workflows Automation ⚡ Voice AI tools Thank you for visiting my profile. Looking forward to working with you! I will 💲REFUND 💲, if your expectation wont meet. For reference, you can see my work and testimonials below. Lets Chat!

🚀 Remote Shopware 6 Developer | 9+ Years of Experience | Certified & Top Rated Plus on Upwork I help eCommerce businesses — especially across Germany, Austria, and Switzerland — build fast, scalable, and reliable Shopware solutions that convert visitors into customers. With over 9 years of hands-on experience, I specialize in: 🔹 Custom Shopware plugin development (Shopware 5 & 6) 🔹 Store migrations (Shopware 5 → Shopware 6) 🔹 Theme development & UI customization 🔹 API integrations with ERP, CRM, payment & shipping systems 🔹 Performance optimization, SEO, and Core Web Vitals 🔹 Full-stack development using PHP, Symfony, JavaScript, Vue.js Whether you're an agency or a growing brand, I work as a remote Shopware freelancer who speaks your tech language — and delivers production-ready code. ✅ CET time zone ✅ Strong communication ✅ Long-term collaboration focus ✅ Certified and Top Rated Plus on Upwork --- 💬 Let’s build something powerful together. 📩 Feel free to connect or message me if you're hiring for a Shopware project, or need a reliable freelance developer on your team.

★★★★★Ratings|| 100% Client Satisfaction || 8+ Years of Experience || 100k+ Earn|| 10000+ Working hours on up-work and many more|| Top Rated Freelancer Expertise in Web and application development || Magento Development || || Wordpress/Woo-Commerce Development|| Website designing || E-commerce solutions || Application development || Social Websites|| E-Learning Solutions|| Software Development|| SAAS Development|| CRM Solutions Experienced developer / programmer with minimum 8+ experience ( Magento 1-2, Wordpress, Vue.JS/ Angular 2-6/ Meteor.JS/ Backbone/ Express/ Laravel/ GraphQL/ React/ Redux/ Typescript/ Wordpress /PHP / MySQL / HTML / CSS / JS ) capable of creating advanced WordPress websites and custom web applications. Accomplishments: ⭐️ As certified members of the AWS Partner Network, our expertise has been formally recognized by Amazon. This affiliation is rare among freelancers and agencies and gives us direct access to resources and best practices most don’t have. ⭐️ Awarded an Expert-Vetted Badge on Upwork Top 1% of Software Development Talent on Upwork ⭐️ Recently received the Top 100 Award on Clutch.co (leader in B2B reviews) ⭐️ Was asked to join Upwork's Customer Advocacy Program ⭐️ We’ve done projects for some big names: Fortune 500 companies ⭐️ Past clients have used web and mobile apps developed by us to raise over $50 million (USD) in funding. I always focus on implementing pixel perfect and responsive UX/UI matching to the designs. Especially I am familiar with JavaScript Frameworks including Angular, React.js, and NodeJS. My Skill Set: - CMS ** Wordpress, Squarespace, Wix - Development Languages: ** HTML5, CSS3, SQL ** JavaScript, TypeScript, ES6/ES7 - Responsive UX/UI development ** UI Libraries - Bootstrap 3/4, Semantic UI, Material UI, Kendo UI ** CSS Skills - SCSS/SASS, FlexBox, Animations - Javascript Development ** ReactJS - React.js, NextJS, Redux, React Native, Saga, Thunk, ** NodeJS - NodeJS, ExpressJS, GraphQL, RESTful API ** Code styling - TS Lint, ES Lint, JSHint. ** Testing Frameworks - Enzyme, Jest, Mocha, Chai, Protractor, Jasmine, Karma - Database Experience ** No-SQL - MongoDB ** SQL Database - PostgreSQL, MySQL, Oracle, SQLite - Web Hosting * AWS EC2, Heroku, Digital Ocean, Ngnix, Godaddy - Project Management Tools and Version Control * Agile/Scrum, JIRA, Asana, Pivotal Tracker, Trello * GitHub, Bitbucket, GitLab Services I provide: ------------------------- * 24x7 Support * Web development services * Appstore Management * Cloud Hosting services * Monthly Maintenance and Upgrading Services ✅ Why Clients Work With Me ⭐ “Exceeded expectations with a CMS using SvelteKit + TailwindCSS – made the entire process smooth and stress-free.” ⭐ “Delivered Python backend solutions 24 hours early with high-quality code.” ⭐ “Fixed critical Node.js API bugs within hours – an exceptional problem solver.” ✅ Why Choose Me ✔ 100% On-Time Delivery – Every single project completed on schedule ✔ Clean, Scalable Code – Built to last and grow with your business ✔ Urgent Fixes – Same-day solutions for critical issues ✔ Transparent Communication – Regular updates, no surprises Please feel free to contact me to take more information. :)