Sahin IT · Independent Software Engineering

I build the production-grade coreand the product on top of it.

Full-stack engineer, ten years in, and founder of ClaimTech. I build software end to end and put it in production: consumer fintech, multi-tenant SaaS, healthcare interoperability, computer-vision robotics.

§01

Selected Work

Ventures, platforms and client builds. Most shipped, all built hands-on.

★ Flagship ventureActive
01

ClaimTech

Consumer fintech · financial justice

A fintech on a mission of financial justice. Most people never claim the money they’re owed, simply because mass-claims are a confusing mess. ClaimTech connects to your bank, finds the claims that are actually yours, and files them for you, in a few clicks.

RoleFounder · Full-stack
SpanSince 2024
TypeScriptNext.jsRustMongoDBPSD2AWS
Two faces of the platform
claim.tech

Overwhelmed by the tangle of mass-claims? With your consent it reads your transaction data, shows which ones apply to you and helps you file them. Built around three things: insight, assistance and alerts.

Next.jsRustPSD2
Claimio

The consumer-facing claims brand at claimio.nl. Check what you might be owed in two minutes, and only pay if your claim actually wins.

Next.jsFastAPIMongoDB
02

GymOS

Active
Gym management platform

The software that runs a gym without a front desk. Members book a slot, sign their waiver and let themselves in with their phone, while the owner gets a location that quietly runs itself. One platform behind any number of gyms.

RoleFounder · Full-stack
Year2025
Next.js 15RedisMongoDBWhatsApp API
03

Home-Gym

Active
Self-service gym · live on GymOS

A boutique self-service gym in Den Haag. No crowds, no waiting, just your workout: four people to a session, and you let yourself in and train whenever it suits you. It’s the first gym running on GymOS, and I build and run it.

RoleDeveloper · Maintainer
YearSince 2025
Next.jsGymOSSmartLock
04

H4Store

Active
Local-commerce platform

Discover the stores, menus and deals around you. A corner shop can be online and taking orders the same afternoon, and keep full ownership of it, while customers browse and order from the places nearby on a map. Built for the local high street, in Arabic and English.

RoleFull-stack
Year2025
Next.js 15MongoDBRTL / i18nS3
05

Manoe

Active
Secondhand marketplace

A marketplace for secondhand fashion, built solo from the API to the pixel. List a piece in a few photos, browse with filters that narrow as you tap, and message a seller to make it yours.

RoleFounder · Full-stack
Year2025
RustaxumNext.js 15HeroUI v3Tailwind v4MongoDB
06

Dutch Web Services

Prototype
Backend generator (PaaS)

A backend you generate instead of build. Describe the data your app needs and it stands up a production-ready API and database behind it, with no boilerplate. It’s for the people who can design a great interface but hit a wall at the data layer.

RoleFounder · Architect
Year2025
.NETMongoDBKeycloakNext.js
07

Leeroverzicht

Shipped
Government platform

A national education-overview platform for the Dutch ministries of OCW and SZW. It pulls scattered training and course information into one place and keeps it current every day, so anyone can find the right course to retrain. I led its move to a modern frontend, and I still maintain it.

RoleDeveloper · Maintainer
YearSince 2023
FastAPIElasticsearchVue 3Kubernetes
08

Rabo Kunstcollectie

Shipped
Cultural platform · Rabobank

Rabobank’s public art platform: the Rabo Kunstcollectie and Art Lab. Browse rotating exhibitions, discover artworks and read how artists respond to the challenges of today. I worked on it as a developer.

RoleDeveloper
Year2024
Next.jsTypeScript
§02

Experience

A decade shipping for robotics, health-tech and government.

2024–now
Banking · fintech

ABN AMRO

Software Engineer

Software engineering on New10, the bank’s fully digital lending platform for small and medium businesses.

AWSPythonNext.js
2023–2024
Government · 500

Stichting ICTU

Full-Stack Developer

Built leeroverzicht.nl for the Dutch ministries of OCW and SZW: a FastAPI and Elasticsearch backend with a Vue 3 / Vuetify frontend. Led the Vue 2 to Vue 3 migration and SEO work; shipped on Jenkins, GitLab CD and Kubernetes.

Python 3.10FastAPIElasticsearchVue 3Kubernetes
2021–2023
Health-tech · 40

Founda Health

Full-Stack Developer

Health-interoperability platform: implemented IHE profiles for cross-hospital document exchange, led a multi-repo to monorepo migration (NX, pnpm, Docker BuildKit), and built API, console and back-office features. Node/Express and Vue, RabbitMQ, Elasticsearch, Grafana.

Node.jsVueIHERabbitMQNX
2020
Studio · 4

Aya IT

Full-Stack Developer

Case-management system with an Azure ML-powered automatic invoice processor. Implemented REST and GraphQL endpoints on C#/.NET, a Next.js/React frontend, and Kubernetes deploys.

C# / .NETGraphQLNext.jsAzure ML
2018–2021
Robotics/ML · 30

Fizyr

Full-Stack Developer

Computer-vision robotics: data-annotation and ML-model-review apps (React, Node, Python), an operator interface with low-level Arch Linux bindings, and C++ communication protocols between robots and cameras. Deployed on AWS and Kubernetes.

C++PythonReactNode.jsAWS
§03

Capabilities

The problems I reach for, and the tools I reach with.

Recurring themes across a decade of building, from low-level robot communication to multi-tenant SaaS that real businesses run on.

Multi-tenant SaaSFintech / PSD2Healthcare interop (IHE)Rust servicesComputer-vision / roboticsRTL & i18nEvent-driven systemsKubernetes & DevOps
ToolYears
Python
6y
Node.js
6y
TypeScript
6y
Docker
6y
React / Redux
4y
C++
4y
FastAPI
3y
Vue.js
3y
C# / .NET
3y
Rust
2y
RabbitMQ
2y
GraphQL
1y
§04

Contact

Open to select engagements and the occasional rescue mission.

Let’s build something solid.

Have a system that needs to go from prototype to production, or a product that needs building from scratch? That’s the work I like best.

Location
Voorschoten, NL