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Data case study
JSleeve
A wearable-enabled basketball performance and competitive gaming platform with real-time shot ingestion, calibration, analytics, live games, timers, and mobile notifications.
Architecture map
Wearable ingestion, live gameplay, timers, and analytics
Client experienceService boundaryData workflow
Challenge
Extend existing session, socket, and job foundations with idempotent ingestion and concurrency-safe gameplay without implying broad frontend ownership.
Solution
Built the newer ingestion, calibration, game lifecycle, Redis timer, analytics, notification, and cross-module account-consistency behavior.
Architecture
REST and Socket.IO share ingestion and lifecycle services; MongoDB persists durable shot/game state while Redis manages live timing and Agenda finalizes scheduled windows.
Contribution highlights
The engineering work behind the product.
- Built a unified idempotent REST and Socket.IO ingestion pipeline for detailed wearable shots, batches, validation, persistence, and retry reconciliation.
- Designed the five-shot Golden Template calibration system with user-owned snapshots, baselines, comparison, accuracy, and fatigue values.
- Built and refactored King of the Court assignment, authorization, shot limits, forfeits, draws, game windows, and idempotent completion.
- Introduced Redis-backed session/game timers and live metrics with pause/resume, TTLs, active-state APIs, degradation, and startup recovery.
- Unified Agenda expiration with the interactive lifecycle service and extended Firebase/FCM and Socket.IO notifications with deep-link context.
- Expanded models, analytics, mobile responses, account-disable/delete consistency, ownership checks, modular services, and targeted tests.
Implementation stack
Technologies grouped by responsibility.
Backend/CMS
TypeScriptNode.jsExpress.jsREST APIsSocket.IO
Data
MongoDBMongooseRedisAgenda
Integrations
Firebase Cloud Messaging
Infrastructure/Delivery
PM2Clustered Node runtime
Testing
Automated lifecycle, ingestion, and rule tests
Related work