ADITYACHAVAN

Multi-Org CRM Platform→

One API over six separate CRM organisations, built so writes stay correct even when the CRM gives no guarantees.

Problem

The business runs several brands, each in its own CRM organisation. Staff needed one system across all of them, but the CRM has no transactions, no idempotency keys and no conditional writes.

What I built

A Java and Spring Boot platform with a crash-safe receipt workflow for two-step writes across organisations, an optimistic-concurrency "write fence" in Postgres, a policy engine for record and field access, and an audit log that captures every write automatically.

Outcome

CRM calls per board interaction cut from about 25 to 1–2; a page across six organisations now waits only for the slowest one; more than 2,300 automated tests.

API Gateway & Data-Sync Platform→

A governed gateway that checks every write against each organisation's live schema before it reaches the vendor, plus a scheduled data sync.

Problem

Eight business organisations each had different, drifting custom fields, and internal tools needed a safe way to write into them.

What I built

Designed and led delivery of a gateway that reads each organisation's schema from the CRM itself, a permission grammar with wildcards and audit controls, a per-record audit trail, and a data-sync pipeline with a validation gate.

Outcome

Empty repository to production in under two months; eight organisations onboarded with one migration and no code changes; the validation gate stopped 843 of 1,345 bad source records before they reached a partner system.

NotiBridge→

Your phone's notifications on your laptop, fully offline: no cloud, no internet, just your Wi-Fi.

Problem

Notification-mirroring tools route everything through the cloud. I wanted it peer-to-peer and private.

What I built

A Kotlin Android app and a Java desktop app that pair by scanning a QR code, find each other on the network with mDNS even when IP addresses change, and keep an encrypted persistent connection with a reconnect state machine.

Outcome

A documented protocol (pairing, authentication, reconnection, state flows) and working pairing and notification delivery.

MARG — Mumbai Ambulance Rapid Gateway→

It started with an ambulance stuck in traffic.

I once watched an ambulance sit in Mumbai traffic, siren screaming, going nowhere. Nobody was being careless. The cars had nowhere to go, and the officers at the junction had no idea it was coming until it was already stuck. Somewhere inside was someone whose minutes were running out. I couldn't stop thinking about it.

What I designed

A coordination platform that alerts every traffic officer within 100 metres of an ambulance's route before it arrives, with its live location and ETA, plus a control-room view. It assists the police; it never takes control of signals or decisions.

Status

System design complete (vision, architecture, stakeholder brief for Mumbai Traffic Police); build not started.

© 2026 Aditya Chavan · Concept, idea and design by Aditya Chavan · All rights reserved

CurriculumGenerator→

Upload course PDFs, get a structured curriculum back.

Problem

Turning a pile of reference material into a structured course outline takes days.

What I built

The backend of a team project: a retrieval-augmented pipeline (PDF text → chunks → embeddings in ChromaDB → a strict prompt that returns curriculum JSON), an async job queue on Redis so long generations don't time out, history in MongoDB and PDF export.

Outcome

Working end-to-end generation with saved history and export. Built with three teammates; I wrote most of the backend (36 of 54 commits).