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Zain Ul Abidin JillaniZJ
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Zain Ul Abidin Jillani

@zainulabidinjillani

Software Engineer at Qbatch who built an Amazon DSP reporting pipeline and a Twilio WhatsApp booking agent.

Pakistan
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At Qbatch, I diagnose and resolve production bugs on a client admin platform built with Next.js, Prisma, and PostgreSQL. My work has included fixing order-count and SLA query logic, order-processing errors, payment-schedule handling, and delivery-partner rerouting.

I built an Amazon Advertising DSP report ingestion pipeline that creates, polls, downloads, and parses reports, with rate-limit retries and safe handling of large numeric IDs. The data feeds a Power BI analytics view.

I also shipped scheduled reporting with Node.js, Agenda, and the Google Sheets API, syncing merchandising data across four sports-apparel leagues. I built consent-sync logic connecting marketing preference toggles to Customer.io.

At Systems Heuristics, I built an AI-driven WhatsApp hotel-booking agent using OpenAI APIs, Twilio’s WhatsApp API, and a FastAPI backend. I shipped it in one to two months with Claude Code; I also use Claude Code daily and have worked with React, Next.js, and API integrations.

Experience

Work history, roles, and key accomplishments

SH

AI/Backend Developer

Systems Heuristics

Jul 2025 - Aug 2025 (1 month)

Built an AI-driven WhatsApp hotel-booking agent with Claude Code, integrating OpenAI APIs with Twilio's WhatsApp API and a FastAPI backend managing conversation state and the end-to-end booking flow.

Education

Degrees, certifications, and relevant coursework

FA

FAST-NUCES

B.Sc., Computer Science

2021 - 2025

Grade: CGPA: 3.20/4.00

Activities and societies: Dean’s Honor List (2022)

B.Sc. in Computer Science from FAST-NUCES, Lahore, Pakistan, from September 2021 to June 2025.

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