Zetema

For developers and students

Tech challenges, ready to pick up.

Real problems people have written down in open-source issue trackers, developer threads and the gaps in public data. Every one is sourced, has a brief and a builder's kit, and is sized so a first version fits a weekend, a few weeks or a semester.

“There is no royal road to geometry.”
Euclid · as reported by Proclus
Where Canada

  • Kit readyA weekend

    Data & pipelines · Anywhere

    Metabase admins can't tell whether an alert was skipped on purpose or broke.

    Solved looks like

    The admin task history shows three distinct states, delivered, skipped because there were no results, and failed, with an automated test for each.

    Proof1 source · 3 quoted claims · github.com/metabase · Sep 2026

    MarketNot sized yet

    Kit5 steps · 22 tools · starter prompt ready

    1. Sourced (done)
    2. Kit (done)
    3. Wanted (next)
    4. Building
    5. Solved
    Open the kit →

    Be the first to want this solved. Nobody is building it yet.

  • Kit readyA few weeks

    Data & pipelines · Anywhere

    Data teams on Airflow 3 don't get their pipeline-level failure alerts, because the callback never runs.

    Solved looks like

    A test that reproduces the bug on current main, and a fix so a DAG-level failure callback fires exactly once when a run fails, including on timeout, checked with LocalExecutor and KubernetesExecutor.

    Proof1 source · 4 quoted claims · github.com/apache · Jul 2026

    Market1 reactions on the issue

    Kit5 steps · 21 tools · starter prompt ready

    1. Sourced (done)
    2. Kit (done)
    3. Wanted (next)
    4. Building
    5. Solved
    Open the kit →

    Be the first to want this solved. Nobody is building it yet.