DEVELOPER.

I build the backend a 2,000-person company runs on.

.NET developer by day. Rookie game maker by night.

Sandhoshsivan M✦.NET Backend Developer✦Coimbatore, India✦Open to new roles✦Rookie game developer✦Sandhoshsivan M✦.NET Backend Developer✦Coimbatore, India✦Open to new roles✦Rookie game developer✦

See what I built Get my resume Say hello

About

Hi,I'm Sandhoshsivan.

Every day, 2,000 people at a company in Abu Dhabi clock in, raise purchase orders, approve invoices and get paid, on software I built.

Since March 2024 I've been the only backend engineer behind it: 28 modules, one codebase, no hand-offs.

I'm happiest in the parts people avoid: money that has to balance to the cent, queries that crawl, and permissions that can't leak a single row.

Sandhoshsivan

2,000+people use it at workAdeeb Group, Abu Dhabi
28modules, one codebaseHR, payroll, procurement, finance, facilities, safety
~600APIs behind every screenASP.NET Core, EF Core, SQL Server
500+online at the same timePeak concurrent users

for Adeeb Group, Abu Dhabi ↑

Outside work

I grew up on Assassin's Creed, Red Dead Redemption and Ori and the Will of the Wisps, and somewhere along the way I wanted to make them, not just play them. I've shipped one small game so far, built from scratch in C#. I'm a rookie, and I'm learning fast.

The rest of my free time goes to money: how it grows, how to invest it, how to keep it. I study personal finance and investing for myself, and that curiosity is exactly why I built Khazana.

Things I'm into

Making gamesRookie game developer. One game shipped, many more planned.
Money that growsI study personal finance and investing, and I use what I learn.

Player 2 · the dream

Rookie game developer · one game shipped

SUN OF ELEGANCECH 02

Sun of Elegance

My first game: a 2D platformer I built from scratch. I'm still a rookie, but I wrote the physics, the controls and the sound myself.

Engine: MonoGame
Lang: C# / .NET 9
Tests: 42

▸Under the hood

C# / .NET 9MonoGameswept-AABB collisionplayer state machineprocedural audio42 unit testsCI on Windows, macOS, Linux

Quest log

1/4

Ship my first game(done)
Learn a 3D engine(next)
Release on itch.io or Steam(next)
Join a game studio(next)

The games that made me want to make games

Assassin's Creed
Red Dead Redemption
Ori and the Will of the Wisps

psst: ↑ ↑ ↓ ↓ ← → ← → B A

What I built

One ERP, six worlds.

HR, buying, money, buildings, safety and paperwork for a 2,000-person company. I built the backend for all of it.

Swipe through the six worlds →

Attendance · Oct
96%present
Payday, on time
Attendance, leave and salaries for 2,000+ people, worked out automatically.
▸Under the hood
HR & payroll module
Purchase flow
RFQ→
PO→
GRN→
INV
From request to invoice
Buying goes from "I need this" to "paid" without a lost email.
▸Under the hood
RFQ → PO → GRN → invoice, budget checks
Journal #4821
Account Dr Cr
Inventory 4,200.00
VAT input 210.00
Payables 4,410.00
Balanced ✓
Books that always balance
Every transaction posts to the ledger by itself, correctly.
↖ Finance is also my hobby
▸Under the hood
Double-entry GL, 16 posting handlers
WO-1187 · Chiller 2
Planned maintenance
Assigned · HVAC team · Due Fri
72%
Buildings that don't break
Maintenance happens before things fail.
▸Under the hood
Assets, planned maintenance, work orders
Hot-work permit
- ✓Area cleared
- ✓Fire watch assigned
- ✓Gas test passed
- ✓Supervisor sign-off
Safe sites
Permits, inspections and incidents in one place.
▸Under the hood
HSE module
Invoice.pdf → fields
Vendor
Al Noor LLC
Total
AED 4,410
Date
14 Oct
Paper in, data out
Scanned documents fill themselves in: 20 hours saved a month.
▸Under the hood
Azure Document Intelligence, 9 document types

Account	Dr	Cr
Inventory	4,200.00
VAT input	210.00
Payables		4,410.00

Case notes

Hard problems, solved.

Big result first. Then what went wrong, what I did, and the exact stack if you want it.

Swipe for more →

Zero double-counted money
When modules talk, a retry could book the same payment twice. I made every message safe to repeat, and the ledger passed internal audit.
▸Under the hood
RabbitMQidempotent consumersdead-letter queues
104 GB → under 100 ms
The server kept choking. I traced it to a giant log table no one had indexed, fixed it, and the spikes stopped.
▸Under the hood
SQL Server execution planstargeted indexes
Every screen ~30% faster
The same data was fetched again and again. Now the system remembers it, for all 500+ users.
▸Under the hood
FusionCache (memory) + RedisP95 latency
Nobody retypes paper
Staff copied scanned documents by hand. Now the system reads them.
▸Under the hood
Azure Document Intelligence OCR

After hours

Things I build for fun.

khazana.app
Khazana
A money app that keeps your data yours.
Built because personal finance is my hobby, and I wanted a tool I could trust.
- Works fully offline; nothing leaves your device
- Bank-grade encryption, unlocks in 49 ms
- Shows your real investment returns
- 1,504 automated tests before every release
▸Under the hood
TypeScriptAES-256PBKDF2 600kSQLite FTS5FIFO lotsXIRR
Open the app Code
hireflow.api
HireFlow Pro
Know your resume score before you apply.
- AI scores your resume against a job, 0–100
- Shows the keywords you're missing
- Tracks every application on one board
- Built to keep AI costs low
▸Under the hood
.NET 10PostgreSQLClaude + GeminiStripeDockerReact 19
Code

Journey

How I got here.

2019
Started engineering
B.E. Computer Science, Rathinam
2023
Graduated
And earned my Azure certification
Mar 2024
Joined Technoduces
Became the only backend engineer on a live ERP
2025
Started shipping my own products
Khazana and HireFlow Pro
Now
Looking for my next team
Backend roles in .NET
Next
Making games for a living
From rookie to studio

Toolbox

Grouped by what they're for.

Building APIs
C#.NET 9/10ASP.NET CoreEF CoreDapperSignalR
Storing and moving data
SQL ServerPostgreSQLRedisRabbitMQ
Shipping it
AzureDockerCI/CDOpenTelemetry
Making games
MonoGameC#next: a 3D engine

My AI pair-programmers

Claude, Cursor and Copilot. I review every line they write.

Working with front ends

Enough to wire my APIs into the screens others build: TypeScript · React · Angular

✓ Azure Fundamentals AZ-900 · 2023
✓ Claude Code in Action · 2026
✓ Redis University · 2026

Got a hard backend problem, or a game idea? I'd love to hear it.

Email is the fastest way to reach me.

GitHub Resume

DEVELOPER.

Hi,I'm Sandhoshsivan.

By day I build ERPs.By night I build worlds.

Sun of Elegance

One ERP, six worlds.

Payday, on time

From request to invoice

Books that always balance

Buildings that don't break

Safe sites

Paper in, data out

Hard problems, solved.

Zero double-counted money

104 GB → under 100 ms

Every screen ~30% faster

Nobody retypes paper

Things I build for fun.

Khazana

HireFlow Pro

How I got here.

Grouped by what they're for.

Building APIs

Storing and moving data

Shipping it

Making games

My AI pair-programmers

Working with front ends

Let's build together

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