Abheet Singh Isher

I'm a full-stack software engineer with 4 years of experience building consumer-scale web products in React, TypeScript and Python. Most recently I was SDE II at QuillBot (Learneo), owning features end to end across five repositories of an AI writing product used by 10M+ weekly users: a Manifest V3 browser extension, a server-rendered React web app and Python/Django services. I architected the AI insert/replace engine that writes LLM output into Google Docs, Gmail, Word and ChatGPT, owned A/B experimentation and Amplitude analytics, cut typing lag with a Playwright + GitLab CI performance pipeline, and wrote the team's AI-assisted development standards. Before that I built React/TypeScript audit dashboards over Python/Django and KDB+ at Barclays, saving an estimated $5,000/month in auditor time. I also ship AI products end to end: a from-scratch CRDT collaborative editor (Weft), AI-native product analytics with guarded LLM-to-SQL and an MCP server (Vantage), and a WCAG-verified design system (Glass). I'm looking for a Software Engineer / SDE II-III, full-stack, frontend, backend or AI/LLM engineer role at a product company, full-time or contract, and I can start immediately.