← Back to ProjectsFeatured
Routinly
Forge an Ironclad Routine
Next.js 15TypeScriptTailwindCSSAuth.jsPostgreSQL
◆
Overview
Built a full-stack habit tracking platform focused on behavioral retention through gamification. Users build consistent routines using XP systems, streak tracking, and progression mechanics with a science-backed 21-day challenge framework.
◆
Key Contributions
- ◆Architected SSR-based application using Next.js for improved performance and SEO
- ◆Designed normalized PostgreSQL schema for habits, streaks, and user progression
- ◆Implemented gamification engine (XP, levels, streak decay logic)
- ◆Built authentication system with session persistence
◆
Engineering Deep Dive
The XP system uses a logarithmic progression curve — early levels come fast to hook users, while later levels require sustained consistency. Streak decay logic handles timezone changes using UTC-normalized timestamps with a configurable grace period. The PostgreSQL schema uses denormalized reads with normalized writes, achieving sub-100ms dashboard API responses.
◆
Challenges
- ◆Streak recalculation logic with timezone edge cases
- ◆Optimizing server-client data flow for real-time XP updates
- ◆Balancing gamification engagement without feeling gimmicky
◆
Learnings
- ◆PostgreSQL schema design for time-series habit data
- ◆Server-side rendering optimization with Next.js 15
- ◆Behavioral design principles for user retention
◆