Tambir Azrab
Senior Backend Engineer. Owning the critical path in fintech.
Social links
Overview
GitHub contributions
About
- I'm Tambir Azrab — a backend engineer with 4+ years in Node.js/TypeScript and MongoDB, and I like being the person who owns the critical path.
- At JazzCash (via AXA) that means production wallet charging, loan and cashback flows, where I've cut failed bundle purchases by over 90%, closed a live loan-timing fraud vector with a same-day hotfix, and fixed out-of-memory failures at 1.5M-record scale.
- I learn quickly, I ask a lot of questions, and I want a senior seat on a large fintech or platform team where the problems are deep and the impact is real.
Proudly supported by
- Vercel
- 1Password for Open Source
- Claude
- OpenPanel
- Mintlify
- PostHog
- Nixtla
- shadcn/studio
- Shadcn Space
- shadcncraft
- Shadcnblocks
- React Bits
- Obelinf
Trusted by top builders on GitHub
awesome. Love the components, especially slide-to-unlock. Great job
You’re doing amazing work.
niiiice one!
Good recreation! Focus state is nice touch
@iamncdai is one of the best design engineers!
Love your work Dai! You’re a great talent :-)
See @iamncdai Wheel Picker. It’s on the registry. Quick install.
lovely sliders!! awesome work!
beautiful site
awesome. Love the components, especially slide-to-unlock. Great job
You’re doing amazing work.
Components(42)
Blocks(12)
Not Found 01
A 404 page with a playable brick breaker game.
Social Proof 01
A social proof section with a logos carousel.
Social Links 01
A social links section with a lined grid layout.
Metrics 01
A metrics section with a line chart.
Team 01
A team section with glowing cards.
Testimonials 02
A testimonials section with a lined layout.
Blog(14)
Joining Claude for Open Source Program (New)
- Published on
Followed by @shadcn on X
- Published on
Stack
Experience
JazzCash
- Location
- Islamabad, Pakistan
- Location type
- (On-site)
- Employment status
- Current
- Cut failed bundle purchases on Jazz's bundle-subscription and load-posting engine from about 1M to fewer than 100K per month (90%+), roughly 7% to under 1% of 15M monthly attempts on a 25M MAU platform. Fixed two high-impact failure modes: fallback load being consumed by active data sessions before bundle activation, and loan recovery reducing the posted balance below the bundle price. Introduced loan-aware charging, sequenced load-to-bundle activation, and compensating reversals across regular and discounted flows.
- Jazz's monthly price changes were failing about 40K bundle purchases and forcing a reversal on every one, while the catalog sat on the old price until someone updated it by hand. Replaced that manual update with an automated midnight sync, cutting the failures and reversals to under 2K.
- Delivered a modernized account statement (first update in 5 years) for 25M+ MAU, overcoming legacy library limitations by introducing a PDF-merge workaround for unsupported design elements. Shipped on the original deadline with zero reversions, impacting an estimated 40,000+ daily exports, and was recognized by leadership for the out-of-the-box solution.
- Identified and patched an active price-spoofing exploit on Ufone bundle activations where bad actors swapped bundle IDs between API calls; bound bundle identifiers server-side at
initand enforced strict mismatch rejection atconfirm, permanently sealing the exploit. - Discovered a production fraud vector where customers could obtain a loan between transaction
initandconfirm, bypassing the originally calculated charge; added confirm-time loan revalidation that rejected stale transactions and required re-initiation, then shipped a same-day emergency hotfix.
- Node.js
- Express.js
- MongoDB
- Mongoose
- Docker
- Kubernetes
- OpenShift
- Jenkins
- ELK Stack
- Grafana
Takmil
- Location
- USA
- Location type
- (Remote)
- Node.js
- NestJS
- MongoDB
- Azure Functions
- Power BI
Smart Coders
- Location
- Rawalpindi, Pakistan
- Location type
- (On-site)
- Node.js
- NestJS
- MongoDB
- Redis
- AWS
- Nginx
- Docker
Education
- C++
- Java
- Python
- PHP
- DSA
- Advanced Databases
- Systems Design
- Distributed Systems
- Software Engineering
- Algorithms
- C++
- PHP
- MySQL
- Laravel
- Node.js
- Pandoc
- Pascal
- HTML
- CSS
- JavaScript
- NukeViet
Projects(1)
Contributed to a CNCF-ecosystem Kubernetes admission controller used in production by defense and enterprise teams by eliminating circular dependencies, refactoring admission lifecycle validation and type definitions, improving build reliability, and enforcing strict type safety.
- Open Source
- TypeScript
- Kubernetes
Recognition(48)
- Type
- Award
- Prize
- Claude Max 20x
- Awarded in
- Received in Grade
- Open source project
Certificate of Trademark Registration No. 594593
- Type
- Trademark
- Issued by
- IP Viet Nam
- Issued on
Gemini Certified Educator
- Type
- Certificate
- Issued by
- Google for Education
- Issued on
Certificate of Trademark Registration No. 584461
- Type
- Trademark
- Issued by
- IP Viet Nam
- Issued on
Animations on the Web
- Type
- Certificate
- Issued by
- animations.dev
- Issued on