A Personal Alignment System unifying execution, emotional awareness, and behavioral intelligence in one calm workspace.
Built to bridge discipline and mindfulness. Rhythmé harmonizes execution tools (tasks, habits, deep work focus) with emotional awareness (zero-knowledge encrypted journaling, mood logging, weekly reflections) and explainable behavioral mathematics.
Case study
Modern knowledge workers operate across 4 to 6 disconnected tools: task managers with infinite anxiety-inducing backlogs, habit trackers with punitive streaks, and siloed journals. Most tools function as cold activity ledgers—recording what was done or missed without acknowledging how the user feels, why patterns break down, or what single action matters next.
Built with Next.js 16 (App Router), React 19, and Supabase PostgreSQL with strict Row-Level Security (RLS). Journal entries are protected by client-side AES-GCM-256 encryption with local PBKDF2 key derivation (100,000 iterations) via the Web Crypto API—ensuring sensitive reflections never touch servers or databases in cleartext.
Features a Single Primary Goal Command Center that eliminates opening paralysis. Habits use a generalized frequency model with 90-day heatmaps and rule-based risk detection. Deep work focus sessions integrate ambient timers with contextual task associations and sub-50ms optimistic UI updates backed by TanStack Query and Zustand.
Rather than pushing black-box LLM directives, Rhythmé employs deterministic statistical correlation engines (Pearson correlation for continuous variables and Point-Biserial correlation for dichotomous events) across 14-day rolling windows to surface explainable, actionable momentum patterns without privacy degradation.
Overcame multi-timezone aggregation shifts with an isolated UTC-to-local normalization pipeline. Minimized dashboard TTFB to sub-350ms by moving strict route protection to Next.js Edge Middleware and implemented in-memory session key caching for 60 FPS streaming zero-knowledge decryption.
Next step
I am always glad to talk with other developers, founders, or recruitment teams who value clear communication and straightforward code.