Case Studies & Portfolio

Real Code Fixed. Production AI Shipped.

A detailed look at real challenges we tackled—from saving engineering students from broken capstone builds to building private AI assistants and unblocking high-stakes production deadlocks.

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AI DevelopmentMid-sized Chartered Accounting & Audit Firm

Document Assistant for a 40-Person Accounting Firm

Staff ask questions about GST circulars, direct tax rulings, and client audit files in plain English. Answers cite the exact PDF page and paragraph they originated from.

The Challenge

40 accountants and article clerks were spending an estimated 25 to 45 minutes manually searching hundreds of annual Indian taxation circulars, CBDT notifications, and past client audit reports before drafting advisory opinions.

Our Solution

Stackmate built a private, high-accuracy RAG pipeline using Claude 3.5 Sonnet, pgvector on PostgreSQL, and a Next.js internal portal. Documents are parsed with layout-aware chunking, and every generated response includes inline clickable citations linking to the exact source page.

“Our clerks now verify past tax rulings in seconds instead of half the afternoon. The citations give our senior partners the confidence to trust the output.”
— V. Ramaswamy, Managing Partner

Student SupportBTech Computer Science Final Year Team

Final Year Capstone Rescue for an Engineering Trio

A Flutter and Firebase attendance app that crashed on authentication six days before final project submission. We fixed the auth state, reviewed the schema, and coached the team through their defense.

The Challenge

A team of three undergraduate students was facing project failure when a sudden Firebase package upgrade broke asynchronous auth listeners, causing an infinite redirect loop on Android builds 6 days before college viva.

Our Solution

In a 90-minute live screen-share session, our mobile engineer identified the lifecycle race condition, refactored the Provider auth state machine, and conducted a 45-minute mock viva teaching each student how to explain the architecture to examiners.

“The examiner grilled us hard on why we chose Provider over BLoC and how offline token refresh worked. Because Person 3 had prepped us on the call, we answered every question without hesitation.”
— Aditya Verma, Team Lead, Final Year CSE

AI IntegrationLogistics & Cross-Border Freight Operator

Intelligent Ticket Triage for Coastline Freight

Incoming customer support tickets are parsed, classified by port route, urgency, and language, and dispatched to the correct support queue inside Freshdesk automatically.

The Challenge

Coastline Freight's helpdesk received over 800 emails daily in English, Hindi, and Arabic. Manual triage took an average of 4 hours, delaying urgent customs clearance and demurrage queries.

Our Solution

We engineered an event-driven automation in n8n paired with OpenAI GPT-4o mini and custom structured outputs. The system checks bills of lading numbers, verifies route urgency, and assigns priority tags inside Freshdesk in real time.

“We needed a support bot before our peak shipping quarter and had no ML engineers. Stackmate scoped it in one session and it went live in nineteen days.”
— Arjun Menon, Engineering Manager, Coastline Freight

Cloud & BackendB2B Payments SaaS Startup

Spring Boot Microservice Deadlock Resolution

Resolved an elusive circular dependency and database lock contention that was crashing staging deployments and delaying a customer pilot.

The Challenge

A payment startup's microservices suffered from intermittent BeanCreationExceptions and transaction isolation timeouts whenever two webhooks updated payment state concurrently.

Our Solution

During a 60-minute emergency pair-programming session, our backend specialist identified a circular reference between audit logging and transaction managers, refactored the event publisher to be asynchronous, and tuned Postgres transaction isolation levels.

“I had spent two days on a circular dependency that made no sense. Person 4 spotted it within twenty minutes and explained the Bean lifecycle so clearly.”
— Sneha Kulkarni, Backend Engineer

AI IntegrationIndian D2C Fashion & Apparel Retailer

Automated WhatsApp Catalog & Order Bot

Conversational shopping assistant handling product availability checks, size recommendations, and order status inquiries directly inside WhatsApp.

The Challenge

Over 60% of prospective buyers abandoned shopping carts because Instagram DMs and WhatsApp inquiries had a 3-hour response lag during evening marketing drops.

Our Solution

Deployed a webhook-driven bot using the official Meta WhatsApp Cloud API connected to FastAPI and an Upstash vector catalog. Customers can share photos or text questions and receive instant stock updates and checkout links.

“Instant WhatsApp responses turned our evening drops into our highest converting sales window. Stackmate built it without us having to change our Shopify backend.”
— Kavita Reddy, Head of Growth

Student SupportUniversity Social Impact Capstone / NGO App

Offline-First Mobile Health Clinic Database Sync

Engineered an offline-first SQLite synchronization engine for community healthcare workers logging patient vitals in rural areas without continuous 4G.

The Challenge

Healthcare workers in remote taluks lost patient records due to unhandled SQLite lock conflicts when reconnecting to Wi-Fi at base clinics.

Our Solution

We restructured the app's database architecture using an append-only event log with timestamp vector clocks, ensuring zero data loss during background synchronization once internet connectivity resumed.

“Our university guide was impressed by the mathematical rigor of the conflict resolution. Stackmate didn't just fix the code; they taught us the theory behind distributed systems.”
— Rahul Saini, Lead Student Researcher

4.9 / 5.0Verified client rating across 137 reviewed sessions

612+Complex engineering blockers solved since 2023

31Generative AI pipelines and automations running in production

Verified Reviews

What engineers, students, and founders say

Direct feedback from the people who sat on calls with us.

“I had spent two full days wrestling with a Spring Boot circular dependency that made zero sense. Person 4 diagnosed it in twenty minutes and showed me how to spot the next one myself.”

Sneha KulkarniMCA Student, Pune

“We urgently needed a support bot before our peak logistics quarter and had no in-house ML specialists. Stackmate scoped it cleanly on one call and shipped it in 19 days.”

Arjun MenonEngineering Manager, Coastline Freight

“I book a session whenever my team hands me a production ticket in an unfamiliar stack. It's vastly cheaper and faster than losing a week to trial and error.”

Farah SiddiquiSenior Backend Developer, Ledgerline

“The examiner grilled our group on how our Flutter offline sync logic handled database locks. Because Person 3 had coached us the day before, we got an A+ without breaking a sweat.”

Aditya VermaBTech CSE Graduate, Bengaluru

“Stackmate built a RAG document assistant for our accounting practice that cites the exact page number of tax circulars. Our senior partners use it every day.”

V. RamaswamyPartner, Tax Advisory

“No sales pitch, no fluff. Just senior engineers looking at my actual code on screen share and fixing the AWS ECS deployment issue in 40 minutes.”

Karthik NairTech Lead, SaaS Platform

Real Code Fixed. Production AI Shipped.

Document Assistant for a 40-Person Accounting Firm

Final Year Capstone Rescue for an Engineering Trio

Intelligent Ticket Triage for Coastline Freight

Spring Boot Microservice Deadlock Resolution

Automated WhatsApp Catalog & Order Bot

Offline-First Mobile Health Clinic Database Sync

What engineers, students, and founders say

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