Ayush B.

I'm a Backend & Automation Developer. I work with Node.js, TypeScript, Python, and AWS. I build systems that run on their own every day, pipelines, integrations, and automation that real businesses depend on. Projects I've built recently, all running in production: A/B price testing system || Node.js, AWS Lambda, DynamoDB, S3, SNS Serverless system that tests two prices against each other on Amazon, decides the statistical winner (Welch's T-Test, implemented from scratch in JavaScript), and automatically switches to the winning price through the Amazon Seller API. Results delivered as HTML reports in S3. Amazon price feed pipeline || Node.js, AWS Lambda, BigQuery, SST Daily pipeline that syncs pricing across all EU Amazon marketplaces, connecting the Amazon Seller API and Advertising API (OAuth), with all data loaded into Google BigQuery. Accounting automation that replaced A2X || Python, BigQuery, Xero Pulls Amazon settlement reports, organizes them in BigQuery, and creates accurate, duplicate-free invoices in Xero across multiple currencies. Verified against A2X: exact match across 21 settlements and 5 currencies — saving the client the monthly A2X subscription. AI content automation with a local LLM || LM Studio, Node.js Self-hosted pipeline that analyzed a client's 150+ Shopline blog posts and automatically added contextual Q&A sections to each one. Runs unattended on a scheduled server job, rate-limited to 5 posts per day. Unified customer database || Cloudflare Workers, Supabase, TypeScript Serverless pipeline that merges customer data from Shopline, MailerLite, and Amazon into one clean, deduplicated record per customer — with identity matching across sources and row-level security in Postgres. What I can do for you: Build or fix Node.js / TypeScript backends and secure REST APIs Integrate third-party APIs (Amazon SP-API and Ads API, Xero, Shopline, and others) Build serverless systems on AWS Lambda and Cloudflare Workers Design data pipelines with BigQuery, Supabase, and DynamoDB Automate business workflows end to end, including AI/LLM-powered automation I'm reliable, fast, and serious about quality. If you want someone who takes ownership and delivers systems that keep working after handover, I'm your guy.