Zaid Sanaullah

Backend tech lead for UI Gyms mock apps where vision-language agents train and run tasks. Owned PostgreSQL and Python/FastAPI APIs, led a 3–4 engineer backend team, and fixed load concurrency issues to support 70+ concurrent agents.

Built task-based Terminal Bench-style environments where agentic models fix multi-file code in data preprocessing, data science, and ML workflows. Authored prompts and test cases, generated sandboxes from prompts, and graded agent fixes against pass/fail test suites.

Led a 4-person coding-evaluation pod focused on RLHF and agent-evaluation pipelines. Audited trainer-reported failures, enforced prompt quality standards, and reviewed multi-language work including C#/.NET and Angular.

Scored real-user coding queries across model samples for correctness, clarity, effectiveness, and conciseness, with written rationales. Authored ideal solutions and flexible rubrics across C#/.NET and Angular without locking to a single golden path.

Led backend for Mandoob Tuwaiq, a city-scale last-mile platform handling roughly 1,000 to 5,000 daily orders. Owned architecture and delivery, shipped payment-gateway and Zid integrations, and built MyFocusTime and related referral and email workflows.

Built C#/.NET Core admin panels and REST APIs for logistics and productivity products before promotion to lead. Owned order lifecycle, real-time status, SQL Server workflows, and payment integrations.

Developed the frontend for a social publishing platform supporting multi-network posting with Angular and UI charting. Migrated LoopBack 3 to LoopBack 4 (TypeScript) by splitting a monolith into an API gateway and microservices using gRPC, adding JWT auth and Stripe subscription billing.

Delivered Angular + .NET Core modules for UK education and government testing systems. Extended exam software for music tests and built multi-evaluator language-test reporting to produce final evaluations from multiple scorers.

Replaced Excel-based operations with an ASP.NET MVC and SQL Server IMS supporting thousands of SKUs. Built billing, courier-shipping integrations, financial reports, an ecommerce storefront, and SMTP order alerts for customers and management.

Built Angular frontends for a school platform including attendance, notes, progress, and test scheduling with AM Charts. Developed a webcomic site supporting uploads, sharing, and reading, matching designs pixel-for-pixel to Figma.

Earned a Bachelor of Science in Business and Information Technology (BBIT) at Virtual University of Pakistan from September 2018 to July 2022.