class Sajid:
    role      = "Full-Stack Developer"
    now       = "RemoteIntegrity (USA, contract)"
    building  = "VoiceCon: realtime AI voice calling"
    focus     = ["Full-Stack Engineering", "Applied AI/ML", "Backend Systems"]
    education = "BSc CSE, AIUB (3.91 / 4.00)"
    base      = "Dhaka, Bangladesh · UTC+6"

I build full-stack software and production-oriented AI/ML systems, from data pipelines and model training to APIs, databases, mobile apps, and the interfaces people use. Most of that work sits where backend engineering meets applied AI.

┌─ WORKING WITH ─────────────────────────────────────────────────────────────┐
│  RemoteIntegrity   Full-Stack Developer   USA · contract    since Oct 2026 │
└────────────────────────────────────────────────────────────────────────────┘
┌─ BUILDING & SHIPPED ───────────────────────────────────────────────────────┐
│  VoiceCon      Android-first AI voice calling with realtime voice          │
│                conversion: Kotlin app, Fastify + Prisma API, Twilio        │
│                media streams, Seed-VC on GPU                               │
│  InvoicePilot  AI invoice processing: OCR, validation, duplicate and       │
│                anomaly detection                                           │
└────────────────────────────────────────────────────────────────────────────┘

VoiceCon · live Android-first AI voice calling. A caller's live speech is converted in real time into an authorized voice profile on a GPU (Seed-VC) and delivered to the recipient over a Twilio PSTN call, using a two-leg media bridge that fails closed so raw audio is never forwarded. Includes a Kotlin app, a billing-aware backend, an admin panel, and a realtime gateway. Kotlin Jetpack Compose Fastify Prisma PostgreSQL Twilio Python PyTorch Seed-VC React

InvoicePilot · shipped AI-powered invoice processing platform, built by a team at Ledgercross. My part was the AI extraction service: an 11-stage pipeline that extracts, validates, and normalizes invoice data via OCR, then flags duplicates and anomalies before it reaches the API. FastAPI Python Mindee OCR PostgreSQL Redis Streams

Fumak Inventory Management · live Inventory and point-of-sale system running in an active retail business, with barcode scanning across a native Android app and a web admin console. Kotlin Jetpack Compose Next.js Neon PostgreSQL Prisma

CaseVault · live Legal document search for Bangladeshi law: FastAPI keyword search over 46 statutes and judgements with a Next.js frontend. FastAPI Python Next.js TypeScript

Mini Kanban Board · live Production-minded Kanban board with authentication, role-based collaboration, secure authorization, and drag-and-drop task reordering. Next.js NestJS PostgreSQL Prisma Docker

LedgerTurf · live Turf booking platform. Players discover and reserve grounds on a Google Map; turf locations carry a MongoDB 2dsphere index. React Express MongoDB Google Maps

ZENJI Storefront · live Anime streetwear storefront with quick view, a cart drawer with a free-shipping meter, and a persisted wishlist, built as a pure-frontend assessment with a Vitest suite and axe-core accessibility scans. React 19 TypeScript Vite Framer Motion Vitest

Neuro-Screen · live demo · hybrid CatBoost + ANN ensemble for cognitive-impairment risk screening in insomniac university students. 2,237 survey responses, 95.2% accuracy, 0.982 ROC-AUC.

Explainable Bangla Toxic Comment Detection · BanglaBERT fine-tuned for toxicity detection in Bengali text, IEEE-format paper. 86% accuracy, 0.91 ROC-AUC, 5-fold cross-validation.

Early Warning Model for High-Value Customer Drop-Off · RFM feature engineering, K-Means segmentation, and Random Forest on the UCI Online Retail dataset. Segments 4,338 customers; the early-risk model reaches 0.79 ROC-AUC on the 776 high-value customers.

Languages

AI / ML

Systems, Data & Web3

Also

2026 ─●─ RemoteIntegrity ·· Full-Stack (Contract) ····· Florida, USA ·· Oct 2026 – Present
      ●─ Ledgercross ······ Software Developer ········ Dhaka, BD ····· May 2026 – Sep 2026
      ●─ BSS ·············· Software Engineer Intern ·· Dhaka, BD ····· Feb 2026 – Apr 2026