A multi-week wellbeing programme for Action for Happiness.
Head of Tech, Action for Happiness
the short version
Participants sign in, return each week, do that week’s action and reflect — in groups led by volunteers. The first signed-in programme on the Action for Happiness platform, built privacy-first.
what I built
Group seats confirmed on the spot — race-free by a Postgres CHECK, not app logic
Each participant gets their action at 9am in their own timezone
Reflections can’t be put in an event payload — the types make it uncompilable
GDPR erasure is structural: delete the account and the data goes with it
Every guardrail is proven against a deliberate violation in CI