Anuj Kumar

Java Backend Developer - Buyogo - Bangalore, Karnataka

(2023-07 - 2024-09)

Designed and built scalable microservices-based backend in Java and Spring Boot powering real-time production dashboards across 200+ factories, enabling live monitoring of KPIs for 500+ business stakeholders.
Developed and optimized REST APIs for a centralised reporting platform, reducing report generation latency by 40% and automating data analysis using distributed systems and design patterns.
Improved system design and backend performance using multithreading and caching best practices, reducing application response time by 30% across 200+ distributed manufacturing sites.
Implemented localization across distributed units, increasing system adoption by 35% within 3 months; wrote JUnit and Mockito unit tests achieving high code coverage across all modules.
Followed Agile/Scrum and CI/CD practices, delivering 4 major releases on schedule; mentored junior engineers on Java, Spring Boot, object-oriented design, and design patterns.

Java Backend Developer - Paytm (One97 Communications Ltd) - Noida, U.P

(2021-06 - 2023-07)

Led design and delivery of a large-scale distributed statement generation microservice in Java 8+ and Spring Boot using Apache Kafka event-driven architecture, scaling automated delivery to 90M+ users and cutting processing time by 60%.
Built high-availability microservices for Paytm Wallet on AWS using Hibernate, JPA, and JDBC, applying multithreading and data structures & algorithms to process millions of daily transactions with fault tolerance.
Engineered SQL query generation and validation pipelines for RBI-compliant regulatory reporting using MySQL and Spring Core, ensuring 100% on-time delivery with end-to-end result verification.
Automated the complete email delivery pipeline via Kafka and JMS, eliminating manual effort by 45%; enforced JUnit/Mockito test coverage and code review standards across the team.
Improved Wallet Admin Panel backend using JDBC-based capabilities, reducing internal team resolution time by 25% and enhancing system observability and reliability on AWS infrastructure.

Java Backend Developer Intern - Paytm (One97 Communications Ltd) - Noida, U.P

(2021-01 - 2021-06)

Contributed to Java and Spring Boot Wallet backend – implemented REST API integrations, wrote JUnit unit tests, applied data structures and performance techniques to resolve 20% of open bug backlog under senior developer mentorship.

About