SELECTED WORK

Results I can point to.

Six cases spanning AI-native delivery, performance overhauls, infrastructure migrations, and shipped mobile at scale.

C.01KAHF · 2025
FULL-STACK

Hikmah performance overhaul

Full-stack rewrite of feed generation, media pipeline, and upload infrastructure for a media-heavy Islamic platform. Shipped end-to-end.

  • Rewrote feed-generation pipeline — queries dropped from 10,000+ to a few hundred per request
  • Integrated TUS resumable uploads for large media files
  • Adaptive streaming and optimized image delivery (ThumbHash, WebP, srcset)
  • Xcode Cloud + GitHub Actions CI for mobile delivery
10k→100s
FEED QUERIES PER REQUEST
TUS · ThumbHash · WebP · srcset · Adaptive streaming · React Native
C.02SASTHYA SEBA · 2023
REBUILD

Qwik + Laravel rebuild

Replaced a failing Next.js codebase with a Qwik + Laravel stack. Achieved perfect Core Web Vitals on day one and compounded organic traffic steadily for a full year.

  • Architected Qwik frontend for sub-100ms TTI on slow connections
  • Laravel modular API serving web, mobile, and third-party integrations
  • Docker Swarm + Traefik for zero-downtime deployments
  • Perfect Lighthouse / CWV across the property
1k→30k
GOOGLE CLICKS / MONTH · 12 MONTHS
Qwik · Laravel · Docker Swarm · Traefik · AWS
C.03SASTHYA SEBA · 2024
INFRASTRUCTURE

AWS → bare metal migration

Proactive CTO initiative. Multi-phase, zero-downtime migration across all production systems. Near-zero egress bandwidth cost via Cloudflare.

  • Phased migration from managed cloud to OVHcloud bare metal (Singapore)
  • Media and asset egress routed via Cloudflare R2 + Proxy
  • Full service continuity throughout — no customer-visible downtime
  • Serves 4TB/month bandwidth at near-zero egress cost
8×
MONTHLY INFRA COST REDUCTION
OVHcloud · Cloudflare R2 · CF Proxy · Docker Swarm
C.04DAILY ISLAM · 2019–24
MOBILE

Daily Islam Android

End-to-end ownership across 8+ feature modules (Quran, Hadith, Dua, Prayer, and more). Architected a modular codebase across 20+ Git submodule repositories to enable parallel freelance team development while keeping core IP protected.

  • 30 languages, 70+ translations, 240k+ Hadiths in production
  • Custom OCR data pipeline — parsed 25+ Hadith books from unstructured sources
  • Laravel CMS with 8 modules, ElasticSearch FTS, TUS upload, Mapbox geospatial, Vue SPA
  • Written team guidelines, ran PR reviews, managed task distribution
1M+
INSTALLS · 4.7★ PLAY STORE
Kotlin · Android SDK · Laravel · ElasticSearch · Vue · Mapbox
C.05KAHF · 2025
PROTOTYPE

Voice AI food-ordering

Built a full voice-AI ordering prototype solo in one week. Client returned specifically requesting my involvement after other teams failed to deliver comparable quality.

  • End-to-end voice capture, tool-calling, and order state management
  • LiveKit + WebRTC for low-latency audio
  • Laravel backend with menu, inventory, and order persistence
  • Client signoff on prototype within the week
1 week
SOLO · PROTOTYPE → CLIENT SIGNOFF
LiveKit · WebRTC · Tool calling · Laravel · Voice AI
C.06BIMAN · 2018
SYSTEM

FIDS at Hazrat Shahjalal

Flight Information Display System for Biman Bangladesh Airlines — deployed live at Bangladesh's primary international airport. Also delivered the official Hajj Flight tracking app and an employee management app with face attendance.

  • Live FIDS rendering across terminal displays at HSIA
  • Real-time GPS tracking (ZaqZaq) for employees
  • IoT sensor monitoring pipeline in Python
  • Postfix + AWS SES + Roundcube managed mail server
Live @ HSIA
PRODUCTION · CUSTOMER-FACING
Laravel · Slim · Kotlin · Flutter · AWS · Python · Modbus