Your API will become your biggest bottleneck before you hit your next growth milestone. Having scaled integrations inside Mastercard and Vodafone, I've seen exactly where systems snap under sudden volume. My solutions don't just rely on theoretical system architecture—they are built on hands-on delivery experience that keeps infrastructure ahead of growth. Who I am ✮ Expert-Vetted — Top 1% on Upwork ✮ Reliably committed for 11+ years to delivering solutions for large corporations like Mastercard & Vodafone. ✮ Experience working in large client facing consultancy ✮ Experienced solving enterprise-grade backend problems ✮ Integrated 50+ POS systems to enable accurate demand forecasting ✮ Data Driven decision making ✮ 100% customer satisfaction guarantee What I Bring • Deep Java + API architecture specialization, focusing on iPaaS and complex system integrations. • Ability to reverse-engineer and debug brittle legacy systems others avoid. • API security, management, automation, and observability built in from the start. • Honest scope-setting—I tell you exactly what's needed, what it costs, and challenge the standard approach when a better one exists. • I lead initiative, track delivery velocity (not just hours logged), and focus on delivered value over completed tickets. • Long-Term Focus: Built for embedded team collaboration and multi-year partnerships. How I use AI I openly leverage AI strictly as an efficiency tool to deepen accuracy, build relevant content, accelerate code delivery, and map systems quickly—never to replace the authentic strategy, human insight, and problem-solving drawn from my computer science background and years of field experience. From my experience this has led to protecting my customers investment, optimized costs and an increase in overall customer satisfaction. Let's talk: Message me directly or send a job invite — happy to hop on a call and walk through your setup.

💯 100% Success Rate on Upwork 🏆 5 Years of Industry Experience 🏆 5-Star Rated Professional Senior MERN, Next.js, and React Native Developer | Data Scientist I specialize in building high-performance, scalable web and mobile applications with a strong focus on efficiency, quality, and timely delivery. Over the past 5+ years, I have successfully delivered projects ahead of schedule and consistently exceeded client expectations. My expertise spans frontend and backend development, API/plugin development, site migrations, speed optimization, and much more. Alongside my development skills, I have solid experience in data science, leveraging statistical analysis, machine learning, and data visualization to provide actionable insights that drive smarter business decisions. My background uniquely positions me to develop full-stack solutions powered by data-driven intelligence. Frontend & Mobile Development: ✅ React.js, Next.js, React Native, Angular.js ✅ UI Frameworks: Bootstrap, Material UI, Semantic UI, Tailwind CSS ✅ JavaScript (ES6+), TypeScript Backend & APIs: ✅ Node.js, Express.js, GraphQL ✅ API & Plugin Development, Site Migrations, Performance Optimization Databases: ✅ PostgreSQL, MySQL, MongoDB, Firebase / Firestore Cloud & Deployment: ✅ AWS, Heroku, Vercel, Docker Data Science & Analytics: ✅ Data Wrangling & Cleaning with Python & Pandas ✅ Statistical Analysis & Visualization (Matplotlib, Seaborn) ✅ Machine Learning: Supervised & Unsupervised Learning, Model Development ✅ Data-Driven Solutions & Insights for Business Growth Methodologies: ✅ Agile, Scrum, Git Version Control With strong communication skills and a client-centric approach, I am committed to helping you build state-of-the-art applications and data solutions tailored to your needs. Feel free to share your project ideas—I’m here to turn them into reality.

With 10+ years of experience, I help businesses grow through powerful digital marketing strategies and high-performing websites that generate real results. I specialize in SEO, Meta Ads campaign management, WordPress, Shopify, and Laravel development — combining marketing expertise with technical execution to help brands scale faster. I have worked with startups, agencies, eCommerce stores, and established businesses to improve online visibility, increase conversions, and build modern, user-friendly websites tailored to their goals. What I Can Help You With: SEO (Search Engine Optimization) Technical SEO On-Page & Off-Page SEO Keyword Research & Competitor Analysis Website Audit & Optimization Local SEO SEO Strategy for Long-Term Organic Growth Meta Ads Campaign Management Facebook & Instagram Ads Lead Generation Campaigns eCommerce Conversion Campaigns Retargeting & Funnel Optimization Audience Research & Scaling ROAS-Focused Ad Strategy WordPress Development Custom WordPress Websites Elementor & Page Builder Design WooCommerce Setup Speed Optimization Security & Maintenance Responsive & SEO-Friendly Design Shopify Development Shopify Store Setup & Customization Theme Development & Optimization Product & Collection Management Shopify SEO Conversion-Focused eCommerce Design App Integrations Laravel Development Custom Web Application Development Backend Development API Integration Admin Panels & Dashboards Scalable & Secure Web Solutions Why Clients Work With Me 10+ years of hands-on experience Strong understanding of both marketing and development Focus on ROI, performance, and user experience Clear communication and reliable delivery Long-term support and collaboration Whether you need more traffic, better conversions, a high-performing online store, or a custom web solution, I can help turn your ideas into results-driven digital experiences. Let’s discuss your project and build something impactful together.

Versatile and detail-oriented Fullstack Developer with deep expertise in Python frameworks, including Django, Flask, and FastAPI. Skilled in backend architecture, API integration, and developing robust, scalable solutions for complex business needs. On the frontend, proficient in React and Next.js, with a strong focus on modern UI/UX best practices and component-based development. Experienced in building clean, responsive, and accessible interfaces that prioritize user experience while maintaining performance and scalability. Proficient in designing and implementing RESTful APIs and GraphQL endpoints, ensuring seamless communication between services and clients. Experienced with Redis and Celery for asynchronous task management, background job handling, and efficient process scheduling. Specializes in building bespoke software solutions tailored to diverse user groups, with strong support for role-based access control (RBAC) and multi-role user workflows. Passionate about creating secure, maintainable, and performance-optimized applications that scale with your business.

Hey! I’m Tajinder – your go-to full-stack web developer with 9+ years of experience building high-performance, scalable websites and web apps. Whether you need a fast-loading WordPress site, a fully customized eCommerce platform, or a powerful API integration—I deliver clean, efficient, and future-proof solutions that help businesses grow. What I specialize in: ✅ WordPress Development – Custom themes, plugin creation, speed optimization, and more. ✅ eCommerce Solutions – WooCommerce or Shopify stores designed to convert and perform. ✅ Learning Management Systems – Seamless course platforms with LearnDash, TutorLMS, or custom builds. ✅ API Development & Integration – Secure, scalable API solutions tailored to your needs. ✅ ColdFusion Development – Maintain or modernize your legacy CFML apps with clean, efficient code. ✅ Full Stack Engineering – Front-end in React, Vue, Angular – back-end with Node.js, PHP, or ColdFusion. ✅ Modern DevOps & Cloud – Git, GitHub, AWS, Heroku, and CI/CD pipelines for smooth deployment. I’m not just a coder—I’m a problem solver. I care deeply about performance, usability, and long-term scalability. My goal is always to build solutions that work today and scale tomorrow. I’m easy to work with, proactive in communication, and committed to keeping you in the loop—no ghosting, no surprises. Let’s talk about how we can turn your idea into something powerful and polished. Available for short-term fixes, long-term partnerships, and everything in between. Keywords Reflecting My Expertise: PHP | Laravel | React.js | Node.js | Vue.js | Angular | WordPress Development | E-commerce Solutions | WooCommerce | Shopify | Custom Themes | Plugin Customization | API Development | Cloud Hosting | AWS | Heroku | Web Applications | Version Control | Git/GitHub | Full Stack Development | Learning Management Systems (LMS) | Website Optimization | Performance Tuning

I build production-ready React, Vue, and React Native apps that real users actually use — including a marketplace with 100,000+ downloads and 100,000+ concurrent users on AWS. MSc in Artificial Intelligence (University of Essex, UK) · Top Rated Plus · 5,000+ hours billed. What I work with Frontend: React.js, Vue.js, Next.js, React Native (Expo), TypeScript Backend: Node.js, Express, REST APIs, WebSockets Testing: Jest (800+ test suites), Playwright, 80%+ coverage Cloud: AWS (Lambda, S3, EC2), Firebase, Docker, GitHub Actions Payments: Stripe, Adyen, Braintree What I've shipped · Livestock marketplace — 100k+ downloads, 4.6, 22% conversion improvement, Stripe escrow · HealthTech logistics platform — greenfield 0→production, 3 portals, real-time WebSocket tracking · FinTech billing platform — 800+ Jest/Playwright tests, coverage from <20% → 80%+, 60% fewer defects · Sports matching app — custom group + 1-to-1 chat, typing indicators, read receipts, App Store + Play How I work Clear communication — no ghosting, no guessing. Honest timelines, clean code, and a product mindset that goes beyond "complete the ticket." I've worked with clients across the US, Europe, and the Middle East. If you need someone who owns the product, not just the task — send me a message.

👋 Hello! I'm a versatile Software Engineer with expertise in both Quality Assurance and Full-Stack Development, dedicated to enhancing your project's performance and reliability. With a strong track record across industries like Fintech, Streaming Services, and Logistics, I excel in optimizing user experiences and ensuring flawless application functionality. 🚀 Here's what I bring to the table: - Automation & QA Expertise: Skilled in Selenium WebDriver for web automation, Appium for mobile automation, and Postman/Swagger for API testing. Proficient in STLC, bug reporting, and test plan creation. - Backend Development Skills: Experienced in C# .NET Framework/Core, ASP.NET Web API/MVC, .NET Entity Framework, MSSQL, and MSUnit for unit testing. - DevOps & Cloud: Familiar with Docker for containerization, Kubernetes for orchestration, AWS/Azure for cloud deployment, and CI/CD pipelines using Git. 🤝 Let's discuss how I can contribute to your project's success through seamless QA practices and robust backend development. Looking forward to collaborating with you! Buzzwords: Payment Integration Stripe Payment Gateway ERP CRM, Develop and Maintain User- friendly Interface.

Agentic AI | RevOps | GTM | Automations | N8N | Zapier Crafting intelligent systems that don’t just respond — they reason, retrieve, act and generate revenue. My name is Ankit – I'm an ex-RevOps SaaS employee and full-time Agentic AI & RevOps automation architect based in London. Over the past few years, I've helped dozens of B2B and SaaS companies scale their revenue operations by building intelligent AI agents and automated workflows that eliminate manual work and drive predictable growth. Clients typically hire me for three reasons: ✅ They're drowning in manual work and need intelligent automation to scale without adding headcount ✅ Their tech stack is disconnected—data is siloed across HubSpot, Salesforce, Clay, and marketing tools ✅ They want AI agents that actually work—not just chatbots, but autonomous systems that handle lead qualification, enrichment, and routing What sets me apart is my combination of technical depth and real revenue operations experience. I've built multi-agent AI systems that qualify leads with accuracy, designed data pipelines processing thousands of leads monthly, and created RevOps frameworks that give teams real-time visibility into their entire revenue engine. I believe automation should enable your team, not create technical debt. Every system I build is designed for reliability, scalability, and measurable ROI. Your workflows should work flawlessly whether you're processing 10 leads or 10,000. If you're serious about scaling your operations with AI and intelligent automation, I'd appreciate the opportunity to learn about your business—and I have plenty of references I can provide. Technical Stack ✅ AI & Intelligent Agents: LLM Integration: ChatGPT, Claude, GPT-4, Gemini, custom models Agent Frameworks: LangChain, LlamaIndex, AutoGPT, CrewAI, custom multi-agent systems RAG Systems: Vector databases (Pinecone, Weaviate, Chroma), embeddings, semantic search Prompt Engineering: Advanced prompting strategies, chain-of-thought, few-shot learning ✅ Automation & Workflow Platforms: Zapier (Expert - complex multi-step workflows, error handling, custom webhooks, high-volume automation) n8n (Advanced - self-hosted deployment, custom nodes, API integrations, workflow optimization) Make (Integromat) - scenario building and advanced routing Power Automate - Microsoft ecosystem integration Custom Python/JavaScript automation scripts ✅ RevOps & GTM Tools: CRMs: HubSpot (Advanced certification), Salesforce (Proficient), Pipedrive, Zoho, Close Data Enrichment: Clay (Expert), Clearbit, Apollo, ZoomInfo, Lusha, Hunter io Marketing Automation: ActiveCampaign, Mailchimp, Marketo, Pardot, Klaviyo Sales Engagement: Outreach, SalesLoft, Apollo, Lemlist Analytics & BI: Google Analytics, Mixpanel, Amplitude, Looker, Tableau, Mode Data Management: Airtable, Google Sheets, Notion, PostgreSQL, MongoDB Communication: Slack (app development), Microsoft Teams, Discord ✅ Integration & Development: REST APIs, GraphQL, Webhooks, OAuth JavaScript (Node js), Python for custom automation and data processing SQL (PostgreSQL, MySQL) for database queries and transformations Cloud platforms: AWS, Google Cloud Platform, Heroku, Netlify Version control: Git, GitHub Real Results I've Delivered ✅ AI Lead Qualification System: Built multi-agent AI system that reduced lead qualification time from 3+ hours to 15 minutes per rep, while improving qualification accuracy to 92% ✅ Cross-Platform Data Sync: Architected bidirectional HubSpot ↔ Salesforce integration processing 50K+ records monthly with 99.8% sync reliability and automated conflict resolution ✅ Intelligent Lead Routing: Designed territory-based routing workflow with capacity balancing that improved response time by 73% and increased MQL→SQL conversion by 28% ✅ Automated Enrichment Pipeline: Implemented Clay-based enrichment workflow that automatically enhanced 90%+ of inbound leads with company data, contact info, and intent signals ✅ Revenue Reporting Dashboard: Created executive dashboard providing real-time visibility across $5M+ annual pipeline with automated weekly reports eliminating 10+ hours of manual work ✅ Customer Health Scoring: Built predictive churn model using behavioral data and automation that identified at-risk accounts 60 days earlier than manual processes Let's Build Your Intelligent Revenue & Operations Engine If you're ready to scale your revenue operations with agentic AI and bulletproof automation, I'd love to learn about your business and discuss how I can help.

I bring 11+ years of experience in Mobile and Web Development, specializing in backend PHP/Laravel systems and native mobile apps using Kotlin, Swift, Objective-C, and Java. I build scalable, secure, and high-performance solutions tailored to your business needs. Our Agency Since 2016, my dedicated team and I have delivered top-quality digital solutions worldwide. ✔️ 150+ apps and platforms launched in the last year ✔️ $500K+ earned on Upwork ✔️ 122+ projects completed, 9,500+ hours logged ✔️ Nearly 100% client satisfaction ✔️ Experience working with startups and 7-9 figure enterprises My Expertise Backend & Web Development • PHP (Laravel, Symfony), MySQL, PostgreSQL, REST APIs, OAuth2, JWT Mobile App Development • Native Android (Java, Kotlin), iOS (Swift, Objective-C) • Cross-platform and API integrations Cloud & DevOps • AWS, Docker, CI/CD pipelines, scalable infrastructure Security & Authentication • Secure user authentication, SSO, role-based access control Why Work With Us? ✅ Custom solutions aligned to your goals and budget ✅ Agile development with clear milestones and communication ✅ Robust, well-tested, and maintainable code ✅ Competitive pricing with no surprises ✅ Proven success across fintech, eCommerce, logistics, and more Industries Served Finance, HealthTech, Logistics, E-commerce, SaaS, Real Estate, and more. What Clients Say "Fast, reliable, and communicative — delivered exactly what we needed on time." – Alexey Levashev, ZOOM International 𝗪𝗼𝘂𝗹𝗱 𝘆𝗼𝘂 𝗯𝗲 𝗮𝘃𝗮𝗶𝗹𝗮𝗯𝗹𝗲 𝗳𝗼𝗿 𝗮 𝟑𝟎-𝟔𝟎 𝗺𝗶𝗻𝘂𝘁𝗲 𝗳𝗿𝗲𝗲 𝗰𝗼𝗻𝘀𝘂𝗹𝘁𝗮𝘁𝗶𝗼𝗻? During this meeting, we will: ✔️ Discuss your project goals, challenges, and priorities ✔️ Outline a clear roadmap and cost estimate ✔️ Identify the best tech approach for your vision Send me a message to schedule your session. Looking forward to building something great together! Best regards, Stas

If you're looking for a Full Stack Developer who can turn your idea into a scalable, production-ready product, with clean architecture, fast execution, and zero unnecessary complexity. You're in the right place.𝐓𝐡𝐢𝐬 𝐢𝐬 𝐞𝐱𝐚𝐜𝐭𝐥𝐲 𝐰𝐡𝐞𝐫𝐞 𝐈 𝐡𝐞𝐥𝐩. I help businesses design and build scalable, secure, and high-performance applications using Python, Node.js, React.js, Next.js, and modern AI technologies like ChatGPT, RAG, and LangChain, deployed on AWS & GCP, so your system not only works today, but continues to grow with your business. With 11+ years of experience across backend, frontend, cloud, and AI engineering, I’ve built enterprise SaaS platforms, automation systems, AI-powered tools, large-scale APIs, and cloud-native applications for startups and Fortune 500 companies, always with clean architecture and scalability in mind. Full Stack Development When you hire me, you get someone who can take ownership of the complete system, from backend logic to frontend experience. 𝐄𝐱𝐩𝐞𝐫𝐭𝐢𝐬𝐞: Backend: Python | Django | FastAPI | Flask | Laravel | Node.js | Express.js Frontend: React, Next.js, Vue.js, Tailwind, Bootstrap, MUI APIs: REST, GraphQL, microservices, webhooks Databases: PostgreSQL, MySQL, MongoDB, Redis, DynamoDB I build systems that are: • Fast • Stable • Easy to maintain • Ready to scale 🤖 AI, Automation & RAG Solutions Many businesses want AI, but what they actually need is AI that solves real operational problems. I design and implement intelligent systems using: • ChatGPT / OpenAI • LangChain, RAG pipelines, vector databases • AI Agents & workflow automation (n8n, Make, Zapier) • NLP, ML models, embeddings, and document intelligence Whether it’s: • AI chat interfaces • Custom AI agents • Automation systems • Document-based AI tools I build solutions that save time, reduce costs, and improve efficiency. Cloud Engineering & DevOps (AWS & GCP) A great application is nothing without reliable infrastructure. I build and deploy using: • Serverless (Lambda, Cloud Run) • CI/CD pipelines • Docker & containerized deployments • Load-balanced, high-availability infrastructure • Logging, monitoring, and performance tuning So your system stays reliable, scalable, and cost-efficient. Experience & Credibility I’ve delivered systems for: Disney, Move Inc., IITs, AIIMS, and fast-growing global startups Clients work with me because I provide: ✔ Clean, maintainable, well-documented code ✔ Clear communication and proactive updates ✔ Fast delivery without compromising quality ✔ Systems built to scale to millions of users What I Can Help You Build • SaaS Platforms & Enterprise Apps • AI Agents, RAG Pipelines, ChatGPT Integrations • Scalable Backends (Python, Node.js, Laravel) • React & Next.js Frontend Applications • Automation Tools & Data Pipelines • Cloud Deployments on AWS/GCP • API Development & 3rd-Party Integrations Let’s Talk About Your Project Whether you’re: • Building a new SaaS platform • Adding AI into your product • Scaling your backend • Automating business workflows • Or fixing a system that’s slowing you down I can help you design and build the right solution. Send me a message, and let’s discuss how we can turn your idea into a smart, scalable, and production-ready system. Top Rated Full Stack Developer & AI Engineer | Python, Node.js, React.js, Next.js, ChatGPT, RAG, LangChain | AWS & GCP