I’m Gerwin, a software engineer. I build and ship software end-to-end, from backend to infrastructure. Below you’ll find what I’m working on and what I’m thinking about. Want to know more? Check the about page. Want to reach me? Scroll down.
Software Engineer
Gerwin Kuijntjes
Software engineer who builds and ships software end-to-end, from backend to infrastructure.
NL / EN
About
Featured projects
SaaSSendScope: Monitoring and Alerting for AWS SES
An all-in-one platform to monitor AWS SES deliverability and receive automatic alerts when something unusual happens. Built after a leaked AWS key got our SES account suspended, blocking all transactional emails, because AWS itself has no workable solution for proactive monitoring.
SaaSSlicekit: A Full-Stack .NET + React SaaS Template You Own
A production-grade SaaS template that ships the boring 80% already built: an event-driven .NET 10 API (vertical slices, DDD, CQRS, messaging) paired with a typed React 19 SPA, plus an Astro marketing site. Passkeys, TOTP, OAuth, granular permissions, a finished admin panel, Stripe billing, a hash-chained audit trail, full observability and CI included. Built because I kept rebuilding the same foundation on every project, and sold once under a commercial license so you own the code.
SaaSStaticForm: Form Backend With Spam Filtering and Full Observability
A SaaS platform that turns any HTML form into a reliable submission pipeline, with 10+ spam checks, complete action logging, failure alerts, and a flat monthly fee that never charges per submission. Built originally to stop rebuilding the same form backend for every client project; now used by developers and agencies managing forms across multiple sites.
Recent posts
AI Is a Car, Not a Bike: How to Actually Use It as a Developer
Why AI coding is a skill, not a threat, and how thinking of it as a car instead of a bike makes you far more effective
How to Fix Procrastination for Good: A Scientific Approach
Discover how to overcome procrastination by managing activation energy and entering flow, based on principles from physics and chemistry
Get in Touch
Let's Connect
Do you have a question, useful feedback, or an idea we could work on together? I intentionally don't use social media, but feel free to contact me via one of the options below.