Es hat, solange es hat.Tamir Azrab
Overview
Social Links
Grüezi // hello
- I'm a backend engineer with over 4 years of experience building robust infra. Lately my curiosity got the best of me, and I'm slowly learning and traversing towards Forward Deployed Engineering — placing myself between cloud systems and practical AI usage.
- I believe technology should solve real human problems, making it easy and effortless for people rather than creating new ones. I'd love to dive into existing architectures, hunt the friction points, then think of ways to place intelligent workflows and automations that greatly improve the user experience — which is all that matters in the end.
Looking for real scale, real problems
Want to be somewhere the problem is worth solving and the systems are worth breaking (on purpose).
Book a call →Open source
Contributor to Pepr. Removed circular deps (#1877), cleaned up admission validation depth (#1255), and 12 more merged PRs.
GitHub Contributions
Stack
Erfahrig // experience
AKSA, Islamabad. JazzCash is Pakistan's largest fintech digital wallet (mobile payments, transfers, bill payments).
Saga-based Subscription Re-architecture
- Monthly txns500K to 2M+
- Subscribers5M+
Replaced non-deterministic legacy logic with compensating transactions for cash reversals, coordinating state across bundle and wallet services via Saga pattern. Eliminated load charge incidents entirely and drove a substantial drop in support tickets.
Cashback Scheduler Overhaul
- Processing time60min<10min83% faster
- Data filtered65%
Diagnosed OOM crashes via heap profiling (1.5M+ records loaded into memory). Re-architected with MongoDB cursor streaming (1K batches), database-level filtering, and async Kafka publishing. Zero incidents over 30-day post-deploy monitoring.
JazzCash Account Statement Redesign
- MAU15M+
- Monthly exports500K+
Unblocked Puppeteer deployment blocked by Node.js v12/v20 incompatibility. Designed PDF composition strategy: statement body via html-pdf, pre-rendered static footer merged at runtime with pdf-lib. Delivered on original timeline with zero infrastructure changes.
- ExpressJS
- MongoDB
- SQL
- Kafka
- OpenShift
- Datagrid
- Jenkins
- ELK Stack
Takmil, a nonprofit EdTech platform providing free education to out-of-school children in rural Pakistan.
Analytics Pipeline Rebuild
- Metric refresh45s3s93% faster
Replaced brittle Google Sheets-based reporting with MongoDB aggregation pipelines using indexed $lookup joins and $group stages. Exposed metrics via REST API consumed by PowerBI, eliminating DB connection crashes. Automated daily stakeholder reports via scheduled Azure Functions.
- TypeScript
- NestJS
- MongoDB
- Azure Functions
- Azure Service Bus
- Terraform
- PowerBI
Smart Coders
Rawalpindi, Pakistan
N+1 Query Elimination
- p95 latency1.8s500ms72% faster
Diagnosed N+1 bottleneck on product listing endpoint (9 sequential queries per request). Refactored to single MongoDB $lookup aggregation, validated under 100 concurrent users via k6. Deployed with PM2 cluster mode (4 workers) for zero-downtime rollout.
Projects
- Tuzmo.com · Artisan marketplace connecting travelers with local sellers across Pakistan
- Ghmza.com · Entertainment platform delivering live and online shows across the Khaleeji region
- TypeScript
- Node.js
- NestJS
- Express
- PostgreSQL
- MongoDB
- AWS (EC2, S3, CloudFront)
- k6
- Nginx
- Strapi
Bookmarks(24)
Choose Boring Technology
- Author
- Dan McKinley
- Bookmarked on
The Log: What every software engineer should know about real-time data
- Author
- Jay Kreps
- Bookmarked on
The Twelve-Factor App
- Author
- Heroku
- Bookmarked on
Site Reliability Engineering
- Author
- Bookmarked on
Laws of UX
- Author
- Jon Yablonski
- Bookmarked on
System Design Primer
- Author
- Donne Martin
- Bookmarked on