Senior Software Developer · Backend Systems & Data Engineering New Delhi, India · rashadkhan359@gmail.com
I build and maintain high-throughput backend systems — from real-time event ingestion pipelines to multi-tenant SaaS platforms. Currently leading two production systems at Z1 Tech:
ORTB — Ad Server & Real-time Analytics Pipeline Tag-based DV360 creative delivery backed by a ClickHouse ingestion layer processing 74M+ sessions/day at 54 events/session. Built the core data architecture: refreshable Materialized Views with explicit APPEND targets for session-duration cohort queries, ORDER BY key tuning for storage reduction, and an async job-based polling system that eliminated PHP sleep() blocking for GAM/DV360 report retrieval.
Plunic — Automation & Content Engine Manages 5 repositories across Laravel, WordPress, Core PHP, and Python (Flask). Built a Flask-based content automation engine integrating OpenAI and Gemini APIs for SEO article generation and automated WordPress deployment. Refactored for generic multi-project orchestration.
BookStackApp/BookStack #5280 — Merged
Added book and chapter context objects to the /api/search endpoint, enabling
hierarchy-aware results without extra API calls. Implemented with eager loading to
prevent N+1 queries; includes full test coverage. First OSS contribution — accepted
and shipped in a feature release.
| Layer | Technologies |
|---|---|
| Languages | PHP 8.x, Python, JavaScript (ES6+) |
| Frameworks | Laravel, Flask, React |
| Data | ClickHouse, MySQL, Redis |
| Infra | Docker, AWS, Nginx, CI/CD (GitHub Actions) |
| Patterns | SOLID, async job queues, materialized views, event-driven pipelines |
Quantum IT Innovation — Full Stack Developer Lead (~2.5 years) Led 10+ Laravel applications, architected APIs across 7 SaaS products, mentored 7 junior developers. Key work: multi-role SaaS with Stripe/Klarna billing (MeinHaus), high-volume email campaign system (Redis + SendGrid, webhook delivery), and a React-based node graph UI for tax hierarchy visualization (TaxMap).