Senior Software Engineer

Company Description

Zenup Health is a tech enabled, full stack mental health platform based in Mumbai, providing expert therapy & psychiatric care. We are building a proprietary, high-integrity and robust Booking Engine for mental health services and are looking for a Senior Software Engineer, currently on a Contractual basis, who can create the technical architecture, supervise implementation, and collaborate with internal developers to build a transaction-safe booking system that will later power our web and mobile applications.

Role Description

• Design and validate the end-to-end booking infrastructure
• Translate complex workflows into a clear SQL-backed state machine
• Supervise and review implementation by junior developers / interns
• Architect and implement a race-condition-safe booking system
• Design row-level locking mechanisms, handle soft-locks, TTLs, zombie lock cleanup, & reconciliation logic
• Design a normalized PostgreSQL schema linking
• Enforce ACID compliance, transaction safety, and UTC-first scheduling
• Build the backend as API-first, ready for web frontend & Future iOS / Android apps

Qualifications

• 5+ years of professional experience in backend / systems engineering
• Currently working as a Senior Software Engineer
• Strong PostgreSQL expertise
• Proven experience building transactional systems (booking, payments, marketplaces)
• Ability to architect a system that scales to 1,000+ bookings/month without admin drift
• Absolute mastery of ISO 8601 and UTC-based scheduling logic.
• Concurrency Management - Deep understanding of solving race conditions and distributed locks.