Portrait of Subid Das
OPEN FOR SELECT PROJECTS

Custom CRMs, AI automation and cloud systems for growing businesses. From the first conversation to production.

Selected work.

A closer look at the platforms, tools and systems I’ve shipped, and the problems they solve.

Deed Poll Services interface

Full Stack Lead2025

Deed Poll Services

UK legal name-change platform with Stripe subscription billing, automated legal PDF generation, passkey auth, and background worker queues.

  • Active UK Legal Platform
  • Stripe Billing & PDF Automation
What I built for Deed Poll Services
  • Full-stack Next.js 16 + SurrealDB architecture with Better Auth (passkeys, OAuth)
  • Stripe subscription and one-time checkout flows with automated webhook reconciliation
  • Automated legal PDF generation via pdf-lib and asynchronous task processing with BullMQ + Redis
  • S3-compatible document storage with transactional email via Nodemailer & React Email

Next.js 16 · SurrealDB · BullMQ · Redis · Stripe · AWS S3 · Better Auth · Docker

Visit website
ridenoww.com interface

Full Stack & Mobile EngineerApr 2025 - Aug 2025

ridenoww.com

UK ride-hailing and mobility service built from scratch with native iOS and Android apps, web portal, and real-time dispatch administration.

  • App Store & Google Play
  • Real-Time Fleet Dispatch
What I built for ridenoww.com
  • Cross-platform React Native app published on Google Play Store & Apple App Store
  • Real-time dispatch system, GPS driver tracking, and instant customer booking
  • High-availability web application with centralized administrative backend

React Native · Expo · React · Laravel · TypeScript · Google Maps API

Visit website
IOCL Enterprise Document AI interface

AI Systems Engineer, Tender WinJul 2025 - Aug 2025

IOCL Enterprise Document AI

Enterprise AI document intelligence system parsing 5,000+ contracts monthly, eliminating 90% of manual review time.

  • 90% Manual Audit Cut
  • 5,000+ Documents/mo
What I built for IOCL Enterprise Document AI
  • Automated multi-page PDF ingestion, OCR normalization, and schema-validated entity extraction
  • Custom RAG pipeline with Pinecone vector embeddings and policy compliance verification
  • Distributed asynchronous task processing with RabbitMQ message brokers

Python · LangChain · Pinecone · RAG · RabbitMQ · Next.js · Docker

M.it Services Native App (Germany) interface

Systems Software EngineerDec 2025 - Feb 2026

M.it Services Native App (Germany)

High-performance native media capture utility built with Rust and Tauri across Windows, macOS, iOS, and Android.

  • Desktop & Mobile Native
  • Concurrency-Safe IPC
What I built for M.it Services Native App (Germany)
  • Hardware screen, camera, and microphone capture pipelines with structured error propagation
  • Concurrency-safe IPC architecture supporting 20+ simultaneous operations without UI blocking
  • Clean cross-platform compilation boundaries ensuring platform-specific isolation

Rust · Tauri · iOS · Android · Windows API · CameraX · AVFoundation

Visit website
Chetmani & Ellora ERP Platform interface

Full Stack & Mobile Consultant2024 - 2025

Chetmani & Ellora ERP Platform

Custom operational ERP, billboard media management, and offline-first mobile inventory tracking cutting manual workflows by 80%.

  • 80% Manual Process Cut
  • 100% Team Adoption
What I built for Chetmani & Ellora ERP Platform
  • Administrative suite for campaigns, billing, contracts, and role-based permissions
  • Offline-first mobile application for field staff with instant local caching via MMKV
  • Adopted across management and field teams, eliminating spreadsheet bottlenecks

Next.js · React Native · MongoDB · MinIO · TypeScript · MMKV

Visit website
Production uptime across client deployments
99.999%
Manual audit labor eliminated for IOCL
90%
Average turnaround from concept to production launch
2-4 Wks
Client IP ownership with zero vendor lock-in
100%

What I
build

(5)

Direct senior engineer.Full IP yours.

From architecture to production code, you work directly with me. Weekly demos, complete documentation and a handoff your team can run with.

More about me ↗

Bottleneck to
production

  1. 01

    Scope

    24 hours

    15-min call → blueprint + fixed quote.

  2. 02

    Build

    2-4 weeks

    Weekly demos on staging. No handoffs.

  3. 03

    Launch

    Launch week

    Zero-downtime cutover. 100% IP yours.

  4. 04

    Stabilise

    30 days

    Free bug-fix warranty + recorded docs.

(Toolbox — 35 tools, scroll faster)

Let's
build.

Tell me what’s slowing your business down. We’ll work out what to build next.

Tell me about your project

A few sentences are enough to start. No technical brief needed.

Service, budget & timeline (optional) +
I need help with
Budget (optional)
Timeline (optional)
LET'S CONNECT