Portfolio

Case Studies

Client engagements and internal R&D — production systems across rail freight AI, fitness, Sanskrit analysis, temple SaaS, and Indology publishing.

01
Rail Freight · Operations Research · LLM
◆ Sumvid R&D

RailYield + RailLM — Yield-Driven Railcar Allocation Platform

Problem

Class I railroads lose margin daily on empty car repositioning. Legacy allocation is greedy-first-fit. FRA regulations (49 CFR 213/215/174) demand a tamper-evident audit trail for every assignment decision.

What We Built

Hybrid MIP + 4-model ML ensemble (TFT, XGBoost, LSTM, LightGBM) with a 6-agent LangGraph framework. A Compliance Verification Agent validates every LLM narrative against the FRA corpus via AstraDB RAG before committing.

HiGHS MIP LangGraph (6 agents) Kafka Kubernetes AstraDB Claude TFT / XGBoost / LSTM PostgreSQL React + TypeScript
+18.7%
Yield vs greedy
99.6%
Fulfillment rate
18.6s
Real-time solve
100%
FRA compliance
Internal R&D product. Built by Sumvid to demonstrate OR + LLM integration for regulated freight operations. Available for licensing or as a foundation for client engagements in logistics.
02
Fitness · Mobile · AI  ·  Client: DJR Solutions

FitFlow — AI Fitness App with Freemium Subscriptions

Challenge

DJR Solutions had an existing customer base and needed production iOS + Android with AI workout plans and Stripe subscriptions — on a startup budget with minimal ongoing OPEX.

Solution

React Native bare workflow for full native control. Supabase Free tier handles auth, Postgres, storage, and Edge Functions. GPT-4o-mini generates personalised plans. Stripe drives $9.99/mo freemium billing.

React Native TypeScript Supabase GPT-4o-mini Stripe iOS Android
$5
OPEX/mo at launch
2
Platforms shipped
AI
Workout generation
∞
Scale headroom
"Went from idea to App Store and Play Store with AI personalisation — all within budget. The Supabase architecture means we pay almost nothing until we scale."
— DJR Solutions, Founder
03
AI · LLM · Sanskrit Studies  ·  Client: Dharma Poshanam Inc

MAP — Sanskrit Verse Analysis Platform

Challenge

Traditional Vedic analysis of a single Sanskrit verse takes scholars hours. Dharma Poshanam Inc needed this automated at scale without losing the 9-segment scholarly structure.

Solution

Gemini 2.5 Pro orchestrated via FastAPI produces all 9 analysis segments per verse. Multi-service Cloud Run with Redis caching for sub-second response on repeated queries.

Gemini 2.5 Pro FastAPI React + TypeScript Cloud Run PostgreSQL Redis Cloud Build
9
Analysis segments
<1s
Cached repeats
3
Microservices
0
Infra to manage
"Analysis that took scholars hours now runs in seconds — with the same structured rigour expected by traditional Vedic methodology."
— Dharma Poshanam Inc, Product Lead
04
SaaS · Religious Services · GCP  ·  Client: Datta Mukti Kshetram

SSM — Multi-Tenant Temple Service Management

Challenge

Datta Mukti Kshetram needed a scalable booking platform for temple sevas and utsavas — architected from day one to expand to multiple temples as a SaaS product.

Solution

Next.js 14 App Router + PostgreSQL on Cloud SQL with multi-tenant data isolation per schema. Google OAuth for devotee login. Cloud Run for zero-ops scaling.

Next.js 14 TypeScript Tailwind CSS PostgreSQL Cloud SQL Cloud Run Google OAuth
MT
Multi-tenant SaaS
GCP
Full stack
0
Ops overhead
OAuth
Secure auth
"Devotees book sevas online — the platform is architected to roll out to other temples as-is, without any re-engineering."
— Datta Mukti Kshetram, Admin
05
Publishing · Cultural Heritage · Headless CMS  ·  Client: Dharma Poshanam Inc

Suvachanam — Digital Indology Journal

Challenge

Dharma Poshanam Inc's legacy static HTML journal had no CMS, broken Devanagari typography, and no mobile experience. Editors hand-edited HTML to publish each article.

Solution

Full React 2.0 replatform with Sanity.io headless CMS, custom VijayaDV fonts with Vedic accent marks (Unicode E301–E303), Fuse.js fuzzy search, and 10+ language auto-translation.

React Sanity.io VijayaDV fonts Fuse.js Firebase Hosting IAST Devanagari
10+
Indian languages
CMS
Sanity headless
v2.0
Full replatform
Vedic
Custom typography
"From a static site maintained by hand to a full CMS-driven journal with proper Sanskrit typography — scholars publish without touching code."
— Dharma Poshanam Inc, Editor