Axel Cedercreutz

Axel Cedercreutz · Product Engineer · Helsinki

Interface, data model, pipeline, deploy, and the on-call after. Building web applications since 2016: five years at Twice Commerce as engineer and analytics lead, and since 2024 product engineer at Gosta Labs, a Helsinki healthcare AI startup building an AI operating system for oncology teams. After hours I build tools for hockey people and a budgeting app for households, and I write about what I learn doing it.

See the work How I work
  • Product engineering
  • TypeScript
  • Python
  • Postgres
  • dbt + BigQuery
  • React
  • FastAPI
  • Growth experiments
  • Expected goals
  • Encryption, done properly
  • Design systems
  • Small teams
  • Ship, measure, repeat
  • Floorball
  • No cookies

Selected work

All case studies →

Three things I built and run myself.

Each one is mine from the first sketch to the deploy pipeline. Two are about hockey, one is about money. All three are about shipping something people actually use.

RinkView shot map. Thousands of shot attempts plotted on an offensive half-rink, each mark sized and shaded by expected goals, with filters for game, team, strength and shooter and a summary panel reading 6,853 shots, 508 goals and 458.61 total xG.
012026 · Live demo, MIT-licensed

RinkView

Shot quality, matchups and lineup decisions for a full NHL season, with the uncertainty kept on screen.

  • Python
  • Django
  • Pandas
  • scikit-learn
  • SQLite
  • Next.js
Banger Board draft room. A roster panel with open slots on the left, a ranked list of players in the middle showing projected points and gain versus waiting, and a position outlook panel on the right estimating the best player available at the next pick for each slot.
022026 · Live on Vercel

Banger Board

A fantasy hockey draft platform for a league whose scoring makes the public rankings wrong.

  • TypeScript
  • Next.js
  • React
  • Vitest
A composition built from Budgy's design tokens showing a month-at-a-glance card with a left-to-spend figure, a stacked category bar in the eight household hues, plan-versus-actual bars, a shared ledger with per-partner avatars and a contributions split. Illustrative numbers, not a product screenshot.
032026 · Running in production

Budgy

Household budgeting for couples. One shared ledger, as little bookkeeping as possible.

  • TypeScript
  • Next.js
  • React
  • Supabase

How I work

Three rules I keep breaking things against.

  1. 1

    Own the whole problem.

    Talk to the people who have it, decide what to build, build it, run it afterwards. The interesting bugs live in the handoffs, so I try not to have any.

  2. 2

    Measure it, don't argue about it.

    Instrument first, opinions second. It is why the analytics tools I build put the uncertainty on screen instead of hiding it behind a confident number.

  3. 3

    Boring infrastructure, exciting product.

    Deploys should be dull, tests should be fast, and the schema should be honest. That is what buys the freedom to be playful where it counts.

Writing

All posts →

Notes from the build.

Short, specific posts about how things were made and what went sideways. No listicles.

  1. 20 Sept 2026How this site is builtAstro, Markdown, two self-hosted fonts and a test suite that reads the built HTML. A short tour of the decisions behind axelcedercreutz.fi.