drivmedelsstation.se
The challenge
Preem stations in several Swedish cities were running a welcome offer. Each person could claim exactly one code, codes could never be handed out twice, even when ad traffic spiked, and the marketing team needed to manage codes and tracking without a developer.
What I built
The client supplied the design; I built and launched the full app. Visitors pick their city and station, confirm their email, and receive a unique code drawn from an uploaded pool, with no payment and no account. Behind it sits an admin dashboard and consent-aware tracking.
Key features
- 01City and station selection, with codes delivered by email
- 02Email verification before any code is released
- 03Race-condition-safe code claiming: no duplicates, even under heavy traffic
- 04Admin dashboard: upload codes via CSV/Excel, live stats, CSV export
- 05Meta Pixel + server-side Conversions API, TikTok Pixel and Cookiebot consent
- 06Tracking IDs managed from the admin, no code changes needed