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This page zooms: scrolling moves you closer, from a name into a sentence, into a project, into its code. Use the arrow keys to step between depths, or read the flat version at /all.
Your system asks for reduced motion, so this page is laid out flat.
I build software for the whole stack: web applications, the services behind them, the firmware inside industrial machines, and once, for the fun of it, a game engine.
I build software for the whole stack: web applications, the services behind them, the firmware inside industrial machines, and once, for the fun of it, a game engine.
I build software for the whole stack: Blixtvakt · Kundvagn · this website, 2026web applications, a distributed enterprise system, 2022the services behind them, Wexiödisk, 2023 →the firmware inside industrial machines, and once, for the fun of it, Shape Shooters, 2020a game engine.
this website · 2026 · personal
This site: one page that zooms from a name down to a piece of code, built on Astro and served from Cloudflare's edge.
Astro · TypeScript · CSS · Cloudflare Pages · Cloudflare Workers
interface · application · services · data
read the whole story · also behind this phrase: Blixtvakt · also behind this phrase: Kundvagn
Wexiödisk · 2023 → · work
I write the control software and the Qt/QML touch interface inside Wexiödisk's industrial dishwashers, and the telemetry that reports every machine back to the cloud. Firmware that has to be right in a kitchen at noon, and screens that work with wet hands.
C++ · QML · Linux · Rhapsody · IoT · Embedded Systems
interface · application · services · data · firmware
Blixtvakt · 2022 · work
At Zenon AB I rebuilt Blixtvakt, an Ionic app that watches SMHI's lightning data and warns you when strikes come close, on a map drawn from OpenStreetMap, with alert settings you tune yourself.
Ionic · TypeScript · OpenStreetMap · SMHI API · Push notifications
interface · application · services
read the whole story · also behind this phrase: Kundvagn · also behind this phrase: this website
a distributed enterprise system · 2022 · university
A university project where I built a system the enterprise way: several services, each owning its own data, talking over REST. Most of what I know about the boundaries between services I learned by getting them wrong here first.
SOA · Microservices · Service Architecture · Enterprise Patterns
application · services · data
Kundvagn · 2021 · university
A university project: an Android shopping-cart app in Kotlin. The part I cared about was sync: two phones, one cart, and Firestore keeping them honest in real time.
Kotlin · Android SDK · Firebase · Firestore · Mobile Development
interface · application · data
read the whole story · source · also behind this phrase: Blixtvakt · also behind this phrase: this website
Shape Shooters · 2020 · university
A university project: a multiplayer arcade shooter and the small engine under it, written from scratch in C++ with SFML. My first real lesson in game loops, timing, and why collision detection is never quite finished.
C++ · SFML · OOP · UML · Game Development
interface · application
// Between depth i and i+1, p runs from 0 to 1.
// The outgoing layer grows around its target;
// the incoming layer shrinks onto that same target.
const s = target.width / incoming.width; // < 1
const k = 1 / s;
out.style.transform =
`translate(${(cx - tx) * p}px, ${(cy - ty) * p}px) scale(${k ** p})`;
inc.style.transform =
`translate(${(tx - cx) * (1 - p)}px, ${(ty - cy) * (1 - p)}px) scale(${s ** (1 - p)})`;enum class State { Idle, Fill, Heat, Wash, Drain, Fault };
State next(State s, const Sensors& in) {
switch (s) {
case State::Idle: return in.doorClosed && in.start ? State::Fill : s;
case State::Fill: return in.level >= target.level ? State::Heat : s;
case State::Heat: return in.temp >= target.temp ? State::Wash : s;
case State::Wash: return timer.expired() ? State::Drain : s;
case State::Drain: return in.level <= 0 ? State::Idle : s;
case State::Fault: return s;
}
return State::Fault;
}const EARTH_KM = 6371;
function distanceKm(a: LatLng, b: LatLng) {
const dLat = rad(b.lat - a.lat), dLon = rad(b.lon - a.lon);
const h = Math.sin(dLat / 2) ** 2 + Math.cos(rad(a.lat)) * Math.cos(rad(b.lat)) * Math.sin(dLon / 2) ** 2;
return 2 * EARTH_KM * Math.asin(Math.sqrt(h));
}
for (const strike of await smhi.latestStrikes()) {
if (distanceKm(strike, here) <= settings.radiusKm && !settings.quietHoursNow()) {
notify(`Blixt ${Math.round(distanceKm(strike, here))} km bort`);
}
}@GET
@Path("/accounts/{id}/balance")
public Response balance(@PathParam("id") String id) {
Account account = accounts.find(id)
.orElseThrow(NotFoundException::new);
Person owner = personService.get(account.ownerId()); // another service, over REST
return Response.ok(new BalanceDto(owner.name(), account.balance())).build();
}cartRef.addSnapshotListener { snapshot, error ->
if (error != null) return@addSnapshotListener
val items = snapshot?.documents?.mapNotNull { it.toObject<CartItem>() }.orEmpty()
_cart.value = items.sortedBy { it.addedAt }
}while (window.isOpen()) {
float dt = clock.restart().asSeconds();
handleInput(window);
for (auto& entity : entities) entity->update(dt, world);
resolveCollisions(entities);
window.clear();
for (auto& entity : entities) entity->draw(window);
window.display();
}