Praveen Kumar
Senior Java Developer
Senior Java Backend Engineer with over 7 years of specialized experience in designing and scaling production-grade systems within the fintech and QR-based platform sectors. Expert in architecting microservices architectures using Spring Boot and implementing robust security frameworks via Redis-backed authentication and JSON Web Token (JWT) management. Proven track record in optimizing data performance through Elasticsearch bulk operations and spearheading the end-to-end lifecycle of mission-critical QR services. Adept at providing reliable production support, performing deep-dive debugging, and ensuring the stability of high-availability payment environments. Committed to technical excellence and cross-functional leadership to drive business value in complex financial ecosystems.
Senior Java Backend Engineer with over 7 years of specialized experience in designing and scaling production-grade systems within the fintech and QR-based platform sectors. Expert in architecting microservices architectures using Spring Boot and implementing robust security frameworks via Redis-backed authentication and JSON Web Token (JWT) management. Proven track record in optimizing data performance through Elasticsearch bulk operations and spearheading the end-to-end lifecycle of mission-critical QR services. Adept at providing reliable production support, performing deep-dive debugging, and ensuring the stability of high-availability payment environments. Committed to technical excellence and cross-functional leadership to drive business value in complex financial ecosystems.
Experience
Software Engineer
Rapidue Technologies Pvt. Ltd.
- Developed Java backend services for the DDRS QR Service Platform, implementing production-grade features for high-volume fintech transactions.
- Built and maintained the end-to-end QR lifecycle management system, supporting automated generation, activation, and retirement protocols.
- Collaborated on the integration of Reverse Vending Machines (RVM) and collection QR workflows to improve automated processing efficiency.
- Implemented SoundBox hardware integrations to enable real-time payment confirmations and merchant notifications across the platform.
- Developed secure Redis-backed authentication systems, featuring One-Time Password (OTP) validation, account locking, and JSON Web Token (JWT) handling.
- Improved Elasticsearch bulk data operations to enhance synchronization performance and ensure system-wide scalability for QR-based services.
Junior Software Engineer-Development
Payswiff Solutions Pvt. Ltd.
- Developed Spring Boot Application Programming Interfaces (APIs) for payment processing and merchant onboarding workflows within a fintech environment.
- Contributed to the integration of backend systems with banking partners, Point of Sale (POS) terminals, and SoundBox hardware to expand payment service capabilities.
- Implemented transaction validation and reconciliation modules to ensure financial data integrity and accurate reporting for payment services.
- Debugged and resolved production issues using advanced troubleshooting techniques, ensuring high availability for critical fintech services.
- Developed comprehensive error handling mechanisms to improve the fault tolerance and resilience of payment processing backend modules.
- Collaborated with cross-functional teams to maintain production environment stability and support the deployment of backend feature updates.
Skills
Education
Computer Science and Engineering
Prakasam Engineering College · Kandukur
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