I build Python automation and data products for Amazon sellers, ecommerce operators, sourcing teams, and marketplace businesses. My core work includes Amazon SP-API integrations, Keepa data pipelines, retailer product matching, profitability analysis, repricing logic, inventory intelligence, and ranked sourcing recommendations. ━━━ 𝗪𝗛𝗔𝗧 𝗜 𝗕𝗨𝗜𝗗 ━━━ I help operators replace manual spreadsheet research and fragmented browser workflows with dependable software that collects product data, normalizes it, applies business rules, and produces clear buying or pricing decisions. My core work includes: ◾ Amazon sourcing and online-arbitrage research tools ◾ Product matching using UPC, EAN, GTIN, ASIN, SKU, MPN, model, and brand data ◾ Profit, ROI, margin, fee, tax, shipping, and break-even calculations ◾ Keepa-based price history, sales-rank, Buy Box, offer, and stability analysis ◾ Amazon SP-API integrations for catalog, pricing, fees, inventory, orders, reports, and listings ◾ Retailer feed imports, web data extraction, monitoring, and change detection ◾ Excel, Google Sheets, database, and dashboard-ready reporting ━━━ 𝗔𝗠𝗔𝗭𝗢𝗡 𝗔𝗡𝗗 𝗦𝗢𝗨𝗥𝗖𝗜𝗡𝗚 𝗘𝗫𝗣𝗘𝗥𝗧𝗜𝗦𝗘 ━━━ A useful sourcing system must do more than compare two prices. It needs to establish whether the retailer item and Amazon listing are truly the same product, calculate realistic landed cost and fees, understand demand and competition, and explain why an opportunity should be bought, reviewed, or rejected. I design scoring engines around configurable business rules such as minimum profit, ROI, margin, sales rank, offer count, Buy Box behavior, Amazon-on-listing status, historical price stability, variation risk, hazmat or restriction flags, and available retailer inventory. Recommendations remain transparent. Every score can be traced to the source data and rule that produced it, allowing operators to adjust thresholds without rewriting the application. ━━━ 𝗣𝗥𝗢𝗗𝗨𝗖𝗧 𝗠𝗔𝗧𝗖𝗛𝗜𝗡𝗚 𝗔𝗡𝗗 𝗗𝗔𝗧𝗔 𝗤𝗨𝗔𝗟𝗜𝗧𝗬 ━━━ I build layered matching workflows that start with reliable identifiers and fall back to normalized brand, model, manufacturer part number, size, pack count, color, and title attributes. Ambiguous matches are not silently accepted. The system records confidence, conflicting fields, and candidate ASINs so uncertain products can move into a review queue. This reduces false positives caused by bundles, multipacks, variations, refurbished items, and retailer naming differences. ━━━ 𝗧𝗘𝗖𝗛 𝗦𝗧𝗔𝗖𝗞 ━━━ ◾ Backend: Python, FastAPI, Django, Celery, Pydantic, SQLAlchemy ◾ Amazon: Selling Partner API, Catalog Items, Product Pricing, Product Fees, Reports, Listings, Orders ◾ Data: PostgreSQL, Supabase, Redis, Pandas, Polars, SQL ◾ Collection: retailer APIs, CSV/XML feeds, Selenium, Playwright, Beautiful Soup ◾ Reporting: Microsoft Excel, Google Sheets API, CSV, scheduled email reports ◾ Infrastructure: AWS, Docker, GitHub Actions, background workers, queues, monitoring ◾ Frontend: Next.js, React, TypeScript, dashboards and admin tools ━━━ 𝗛𝗢𝗪 𝗜 𝗪𝗢𝗥𝗞 ━━━ ◾ I validate the sourcing formula and decision rules before scaling data collection. ◾ I separate retailer connectors, Amazon services, matching, scoring, and exports into modular components. ◾ I build for API throttling, retries, token refresh, duplicate records, incomplete identifiers, and changing retailer formats. ◾ I document calculations, data sources, assumptions, configuration, and deployment. ◾ I deliver in measurable stages - one retailer and a validated scoring model first, then additional sources and dashboard features. ━━━ 𝗪𝗛𝗔𝗧 𝗖𝗟𝗜𝗘𝗡𝗧𝗦 𝗛𝗜𝗥𝗘 𝗠𝗘 𝗙𝗢𝗥 ━━━ → Building an Amazon sourcing or online-arbitrage research platform → Connecting SP-API, Keepa, Seller Central data, and retailer feeds → Automating profit, ROI, fee, demand, competition, and risk analysis → Matching retailer catalogues to Amazon listings at scale → Creating repricing, inventory, Buy Box, or listing-monitoring tools → Replacing manual product-research spreadsheets with maintainable Python software → Exporting ranked opportunities to Excel, Google Sheets, or a SaaS dashboard → Stabilizing an existing Amazon integration affected by throttling, authentication, or inconsistent data ━━━ 𝗟𝗘𝗧'𝗦 𝗧𝗔𝗟𝗞 ━━━ If you need a Python engineer who understands Amazon data, ecommerce economics, and production automation, send me a message. I can start with a focused proof of concept, validate the data and scoring logic, and expand the system without rebuilding its foundation.

Hi, I am a Professional & Dedicated Sr. Full-Stack Developer with 5+ years of experience in developing and deploying applications. I have strong expertise in E-commerce tools development for Amazon seller central and Amazon Advertising || PPC automation. Skills Summary: ✷ Javascript (ES6) ✷ React.js ✷ Vue js ✷ Node.js (Express.js) ✷ Databases (MongoDB, Postgres, Mysql) ✷ Apollo Client ✷ Redux ✷ Redux Toolkit ✷ UI Frameworks (Antd, Material UI, Bootstrap, Semantic UI) ✷ ORM (Mongoose, Sequelize) ✷ Webpack and babel ✷ Testing (React Testing Library, Jest)

I'm a 7-year Amazon FBA owner-operator who scaled a wholesale business from $800K to $13M+ annually before selling my stake in 2026. I've managed 10,000+ ASINs across 20+ brands — handling everything from vendor sourcing and PO negotiation to pricing strategy, account health, and FBA inventory management. What makes me different from most Amazon consultants is that I didn't just manage a marketplace — I built the systems to run it. I developed custom Python automation tools, a real-time replenishment dashboard, Slack bots, and a NetSuite ERP integration because the off-the-shelf solutions weren't solving my problems fast enough. What I can help you with: - Amazon FBA operations, inventory planning, and replenishment strategy - Wholesale brand sourcing and vendor negotiations - Listing optimization, pricing strategy, and Buy Box management - PPC campaign management and account health - Building or improving your Amazon ops workflow and automation I work best with brands and agencies that want someone who treats the business like their own — not someone who just runs reports.

I design and engineer large-scale marketplace automation systems that power end-to-end eCommerce operations across Amazon, eBay, Walmart, and Etsy ecosystems. Over the past 7+ years, I’ve worked deep inside marketplace API ecosystems—building production-grade integrations that handle everything from product lifecycle management to real-time inventory synchronization, order orchestration, pricing intelligence, and supplier data pipelines. My focus is not just API integration—it is building reliable commerce infrastructure that connects marketplaces, suppliers, and business logic into a single automated system. I have extensive experience working within restricted API environments, including Amazon SP-API PII approval workflows, secure data handling, and compliance-driven architecture design. Core Engineering Focus Areas Marketplace System Architecture I build distributed marketplace systems that unify: • Amazon SP-API (Listings, Orders, Reports, Catalog, Feeds) • eBay APIs (Sell API, Trading API, Finding API) • Walmart Marketplace API integrations • Etsy API-based product and order automation These systems are designed for: • High-volume SKU management (100K–500K+ listings) • Multi-channel synchronization • Fault-tolerant order processing pipelines Commerce Automation & Data Flow Engineering I specialize in replacing manual eCommerce operations with fully automated workflows: • Supplier → Marketplace automation pipelines (API / FTP / CSV ingestion) • Real-time inventory & price propagation engines • Automated order routing & fulfillment logic • Multi-vendor dropshipping orchestration systems The goal is always the same: zero manual intervention between supply chain and marketplace execution. Amazon Ecosystem Engineering (Deep Expertise) • Amazon SP-API full-stack integration • PII approval workflows and restricted data compliance • Amazon Product Advertising API integration • Amazon Advertising API data utilization • Large-scale catalog ingestion and product matching systems • Seller Central automation tools for operational efficiency Pricing Intelligence & Market Analytics Systems I build data-driven pricing infrastructure that includes: • Competitor price tracking engines • Dynamic repricing systems • Market intelligence dashboards • Cross-platform price comparison engines • Real-time CSE (Comparison Shopping Engine) reports SaaS Platform & API Product Development I also develop API-first SaaS platforms for eCommerce businesses: • Multi-tenant architecture design • Subscription-based marketplace tools • Scalable backend APIs for automation products • Admin dashboards for marketplace operations Payments & Revenue Infrastructure • Stripe integration for subscription systems • Authorize.net payment flows • Razorpay / Instamojo integrations • Billing automation & invoicing systems Technology Stack Backend & APIs: • PHP (CodeIgniter, Laravel) • Python (automation, data pipelines, API services) • REST / JSON / XML / OAuth 2.0 integrations Databases: • MySQL (high-volume optimization, indexing, query tuning) Cloud & Infrastructure: • Amazon Web Services (EC2, S3, deployment workflows) Data Engineering: • ETL pipelines • CSV/Excel automation systems • Scheduled synchronization jobs Frontend (support layer): • AngularJS dashboards • Admin panels for marketplace tools Engineering Impact • Built multi-marketplace systems managing 300K+ product catalogs • Designed inventory synchronization systems operating in near real-time cycles • Developed dropshipping automation platforms with continuous supplier updates • Delivered marketplace integrations used across Amazon, eBay, Walmart, Etsy ecosystems • Engineered pricing intelligence systems used for competitive decision-making What I Solve I help businesses move from fragmented marketplace operations to fully automated commerce systems where: • Listings sync automatically across channels • Inventory is always accurate • Orders flow without manual handling • Pricing adapts dynamically to competition • Suppliers and marketplaces stay continuously connected

I've spent the last 5+ years building Laravel applications for businesses in the UK, US, and India — SaaS platforms, admin dashboards, booking systems, and the REST APIs that hold them together. 30+ projects in, I still read every brief like it's the first one. I'm Chahat, a full-stack developer with 5+ years and 30+ projects delivered for clients across the UK, US, and India. I help businesses build Laravel web applications, Vue.js dashboards, SaaS platforms, custom admin panels, and REST API integrations — end to end, from database design to the interface your team uses every day. 𝐖𝐡𝐚𝐭 𝐈 𝐂𝐚𝐧 𝐇𝐞𝐥𝐩 𝐘𝐨𝐮 𝐖𝐢𝐭𝐡: ✅ Laravel applications — SaaS platforms, CRMs, dashboards, booking systems, custom business tools ✅ REST API development and third-party integrations — Stripe, Razorpay, PayPal, Amazon SP-API, Google Calendar, OAuth2 flows ✅ Custom admin panels your team will actually enjoy using ✅ Vue.js and React.js frontends that connect cleanly to your Laravel backend ✅ WordPress — custom plugins, theme development, WooCommerce, Elementor Pro, security fixes ✅ MySQL database design and query optimization ✅ Bug fixing and code audits on existing Laravel apps — yes, even the messy, undocumented ones ✅ SEO-optimized landing pages and business websites with schema markup 𝐖𝐡𝐲 𝐂𝐥𝐢𝐞𝐧𝐭𝐬 𝐖𝐨𝐫𝐤 𝐖𝐢𝐭𝐡 𝐌𝐞: I read the brief properly and ask the right questions upfront — not disappearing for two weeks and coming back with something unrecognizable. I write clean, documented code because someone (maybe you) will need to maintain it later. I communicate throughout the project, not just at the start and end, and I don't ghost after delivery — if something needs tweaking, we sort it out. I'm based in India (IST) and have worked extensively with UK and US clients, so async workflows, clear documentation, and timezone-friendly communication are simply how I operate. No excuses about time differences. 𝐓𝐨𝐨𝐥𝐬 𝐈 𝐔𝐬𝐞: Backend → Laravel, PHP, MySQL, REST API, MVC, OAuth2, Webhooks Frontend → Vue.js, React.js, Blade, HTML5, CSS3, JavaScript, jQuery, Bootstrap, Tailwind CSS WordPress → Custom plugins, WooCommerce, Elementor Pro, ACF, security hardening Tools → Git, GitHub, Postman, Composer, cPanel, Linux, Google Search Console If you're building a Laravel application, a SaaS platform, or need clean REST API integrations done right, send me a message and let's talk about your project.