# Hassan Abrar

> Senior Backend Engineer · distributed systems and multi-tenant architecture · Lahore, remote.

I'm a senior backend engineer with 5+ years building and operating production systems across enterprise fintech, adtech and high-volume SaaS. I work across both major backend ecosystems, Java/Spring Boot and Node.js/TypeScript, with depth in event-driven microservices, multi-tenant architecture and real-time data pipelines.

I led the decomposition of a monolith into 12 production microservices, architected multi-tenant infrastructure for 1,000+ isolated tenant databases at 99.9% uptime, and have mentored 5+ engineers. I work remotely with teams across Saudi Arabia, Europe and North America.

## Selected architectures
- ClickFortify: Real-time ad-fraud detection for Google Ads and Meta Ads. Stack: Node.js, TypeScript, NATS, Redis Bull, MongoDB, Next.js.
- Masdr payroll platform: Enterprise fintech and payroll for large Saudi employers. Stack: Java, Spring Boot, JMS, Apigee, Splunk, Jenkins, IBM UrbanCode Deploy, WebLogic.
- Southville multi-tenant platform: From one monolith to 12 production microservices. Stack: NestJS, Node.js, Spring Boot, MongoDB, PostgreSQL, Redis, JMS, Docker, Kubernetes.
- VoxRange: Voice AI and call analytics infrastructure. Stack: Telephony, Speech-to-text, Text-to-speech, Self-hosted GPU.
- Lytics · PEMRA: Media monitoring and intelligence for the Pakistan Electronic Media Regulatory Authority. Stack: Node.js, React, MongoDB, PostgreSQL.

## Experience
- Senior Backend Engineer, Mission.dev (2025-05 – present)
- Senior Software Engineer, Southville Solutions (2023-02 – present)
- Associate Software Engineer, Stack Intel .IO (2021-05 – 2023-01)
- Developer Head, MSP Community, University of Lahore (2021-10 – 2022-04)
- BS Computer Science, The University of Lahore (2017-09 – 2021-06)

## Writing
- Blocking invalid ad clicks while the campaign is still running: https://hassanabrar.com/en/blog/blocking-invalid-ad-clicks

## Links
- Site: https://hassanabrar.com/en
- Résumé: https://hassanabrar.com/resume.pdf
- Email: hassanabrar202@gmail.com
- LinkedIn: https://www.linkedin.com/in/hassanabrar202/
- GitHub: https://github.com/hassanabrar202