Sandeep Kumar
Gurgaon
Summary
Backend-focused software developer with 2.6+ years of experience working in a product-based IT environment. Experienced in building scalable backend systems and RESTful APIs using Java and Spring Boot, with a strong foundation in Object-Oriented Programming principles. Hands-on experience in search system design using Apache Solr and event-driven architectures with Kafka, along with a solid understanding of microservices, distributed systems, and performance optimization.
Overview
2
2
years of professional experience
Work History
Software Engineer
Libsys Ltd.
Gurgaon
07.2023 - Current
- Developed and maintained a Web-based OPAC system that enables library members to search books and journals, check availability, manage issuances, view fine status, and complete no-dues processes without visiting the library.
- Designed and implemented the end-to-end search functionality using Apache Solr, including schema design, indexing strategy, and query optimization for large journal datasets exceeding 10 million records.
- Deployed Apache Solr in a distributed environment using ZooKeeper to support sharding, replication, and fault tolerance for high-volume search workloads.
- Optimized search performance by tuning Solr queries and schema configurations, leveraging filter queries (fq), efficient analyzers, and appropriate field types to reduce query latency and improve relevance.
- Implemented multi-level caching (application-level caching and Solr internal caches) to minimize redundant search queries and improve response times for frequently accessed search operations.
- Designed an event-driven indexing mechanism to keep Solr indexes synchronized with database changes, publishing create/update events to Apache Kafka and consuming them asynchronously for near real-time indexing.
- Built Kafka producers and consumers to decouple transactional workflows from search indexing, improving scalability, system resilience, and overall throughput.
- Developed RESTful APIs using Spring Boot following microservices and clean architecture principles to support search, availability checks, and member operations.
- Ensured reliability of indexing workflows by handling idempotent consumers, retry mechanisms, and error recovery for Kafka-based Solr indexing.
- Collaborated on database design and backend optimization to maintain data consistency between transactional systems and search index.
- Designed backend services using object-oriented principles to ensure code reusability, extensibility, and long-term maintainability.
Education
Bachelor of Technology - Computer Science
Dronacharya College of Engineering
Gurgaon06-2023
Skills
- Java, Spring Boot
- RESTful API Development, Microservices
- Apache Solr (Distributed Search, Indexing, Query Optimization)
- Apache Kafka (Event-Driven Architecture, Producers & Consumers)
- Caching Strategies, Performance Optimization
- Relational Databases (MySQL / PostgreSQL — pick what applies)
- ZooKeeper
- Object-Oriented Programming (OOP)
- Git, Maven
Timeline
Software Engineer
Libsys Ltd.
07.2023 - Current
Bachelor of Technology - Computer Science
Dronacharya College of Engineering