Sehit Degirmenci

AI-native engineer @

Modestly

Specs, builds and ships real systems

froma vague asktoproduction

Built @

Nordisk Software&

Jello

Side project @

ChatBot Skriv

Featured Projects

Modestly, one checkout that pays many brands

Clean Architecture in C#, load-tested to 2,180 concurrent shoppers, paying brands through Stripe Connect

269,608 lines of code4,503 tests in the deploy gate409 API endpoints

2,180 usersStripe ConnectClean Architecture

Nordic Engine, a CRM that calls and listens

Multi-tenant CRM where the database itself keeps companies apart. Browser softphone, two-channel transcripts, AI call review

125,908 lines of codeLive demoIsolation proven in SQL

RLSG.711 → RealtimeMulti-tenant

Jello, a shopping agent you text

An AI agent in iMessage and WhatsApp that searches 36 shops and marketplaces. Prices are written by code, never by the model

1st place, Hackathon of Hackathon Winners52,380 lines of code36 shop adapters

An espresso machine under 3,000 kr?

Jello

Used road bike, size 56, near Copenhagen

Jello

1st placeiMessage36 shops

ChatBot Skriv, typing into a canvas

A Chrome extension that types into Google Docs through its hidden input frame, slips and all

Live in the Chrome Web Store27,555 lines of code180 tests

Manifest V3byte for byteDocs

Side Projects

ExpressPostgres

Construction ops system.
41,117 lines: projects, offers and crews for a builder

WorkersDurable Objects

Peter, a voice secretary.
Speak a task, get a calendar event or a mail draft

PythonWorkers

Website offer pipeline.
Scores sites, builds a preview per business, turns visits into leads

🎙“run the tests and push”

SwiftNode

ScooterVoice.
Hands-free coding by voice, iPhone to Mac

My Engineering Toolkit

Money that adds up

Data that stays apart

AI on a short leash

Full Stack EngineerC# / .NETPostgreSQLTypeScriptPythonCloudflareStripe

My Journey

Jello
Data and search engineer
Sep 2026 to now
Startup
A startup with paying users. We won first place at the Hackathon of Hackathon Winners with it, then kept going: 585 commits in the ten days after.
ChatBot Skriv
Sole engineer
Aug 2026 to now
Side project
From an idea to a product with paying users in the Chrome Web Store, with card and MobilePay subscriptions, in two months.
Modestly
Founder, sole engineer
Dec 2025 to now
Own company
6,054 commits. I wrote the specifications, set the architecture, rebuilt the backend in C# when the first version hit its limits, and reviewed every change before it reached the server.
Nordisk Software
Software developer, AI engineer
Aug 2025 to May 2026
Employee
Built Nordic Engine for the sales team, then split it so a second company could sell from the same system without ever seeing our data.

About

Hello

my name is

Sehit

Hi, I'm Sehit :)

I'm an engineer in Copenhagen who builds the parts of a product users never see: money that splits correctly, data one company can never read from another, and AI that is only allowed to choose the words around the facts.

I work AI-native. I write the specification, set the architecture, direct AI agents to implement it and review every change against the running system. I measure myself by what is in production, not by what is on a branch.

Give me a hard problem and a deadline. That is where I do my best work.

Engineering Philosophy

For me, engineering is discipline.

A system is only as good as the day it goes wrong. So I write down what must never happen, prove it with a test against the real database, and only then call a feature done.

Two books on my desk shaped how I work: one on staying calm under pressure, one on reading the people across the table.

“Stillness is the key.” I reread the title whenever production is on fire.

Ryan Holiday

Beyond the Screen

Outside work I train fighting sports. The ring teaches the same thing production does: you find out who you are when the plan stops working.

Photos from training are coming soon.

A Little Thank-You for Scrolling

give the shutter a click!

Thanks for scrolling all the way here. I saved three moments for you. Click the shutter three times to print them, and feel free to drag them around.