Kuldeep Kumar

JioSaavn | IIT Kanpur

India

About

🇮🇳 Backend Software Engineer (4+ years) skilled in building secure, scalable backend systems using PHP and Java, with experience in Kafka, Redis, MongoDB, and MySQL. Delivered high-impact projects in payments, subscriptions, and internal tools — driving a 14% uplift in premium conversions, eliminating activation failures, and enabling faster campaign launches.

Experience

  • JioSaavn ()
    • Senior Software Engineer
      Apr 2025 - Present · 1 yr 4 mos

      Spearheading backend architecture enhancements for JioSaavn's premium subscription flows, focusing on system scalability, fault tolerance, and revenue growth. Pro Funnel Optimization: Redesigned the premium purchase flow by restructuring the Pro page into highly scalable, modular components using Factory and Strategy design patterns. Validated enhancements via A/B testing, directly contributing to a 14% increase in premium plan purchases. High-Availability Distributed Systems: Architected and integrated a Kafka-based retry mechanism within a Spring Boot backend to handle server-to-server (S2S) callbacks from major vendors (Juspay, Google, Apple, MyJio). System Reliability: Automated fault tolerance for transient database failures, entirely eliminating missed subscription activations and significantly boosting user satisfaction. Skills: Spring Boot · Apache Kafka · System Architecture · Design Patterns · API Integration

    • Software Engineer
      Jul 2022 - Mar 2025 · 2 yrs 9 mos

      Developed and optimized core monetization features, full-stack payment ecosystems, and internal developer platforms that drove significant user engagement and operational efficiency. Payment Ecosystem & Monetization: Led the full-stack development (ReactJS frontend, PHP backend) of the Pro Purchase ecosystem on the web app. Integrated Juspay for secure transactions and built a real-time discount coupon API, supporting targeted marketing campaigns that drove a 300% weekly increase in premium subscriptions. Product Launches: Engineered complex backend workflows (entitlement logic, product ID mapping, pricing rules) to successfully launch Family and Duo premium plans, which rapidly captured 5% of all new premium subscriptions. Internal Tooling & Automation: * Built a comprehensive Coupon Code Management platform utilizing React, PHP, and Redis Pub/Sub for large-scale MongoDB insertions. This empowered non-technical teams to manage promotions independently, cutting campaign setup time by 50%. Developed a secure Refund Management Tool from scratch (implementing Google Sign-In, RBAC, and MongoDB with indexing/TTL), reducing refund processing time from hours to mere minutes and saving hours of developer effort. Skills: React.js · PHP · MongoDB · Redis · Backend Development · Payment Gateways (Juspay)