Java Developer 1. Project & Role Ownership
Explain project architecture and your contributions.
Demonstrate end-to-end understanding of the system.
Justify key architectural decisions.
Java Fundamentals
Java 8, 17, 21 features (Streams, Lambdas, Collections).
Java version differences and trade-offs.
Performance vs readability considerations.
Databases & SQL
Relational database concepts and SQL optimization.
Stored procedures, views, triggers, and transactions.
Database vs application-layer responsibilities.
Microservices & Event-Driven Architecture
Microservice design principles.
Synchronous vs asynchronous communication.
Kafka-based messaging and scalability.
Kafka & Reliability
Retry mechanisms, DLQ/DLT, and error handling.
Message durability and fault tolerance.
Designing production-ready asynchronous systems.
Distributed Systems
Idempotency and duplicate message handling.
Distributed transactions and Saga pattern.
Consistency in event-driven applications.




Performance & Scalability
Bottleneck identification and optimization.
Database indexing and concurrency.
Observability and system tuning.
Core Java & Data Structures
Collections framework (HashMap, LinkedHashMap, TreeMap, etc.).
Thread safety and concurrent collections.
Time and space complexity.
OOP & Multithreading
Serialization.
Threads, Runnable, interfaces, and abstract classes.
Core concurrency concepts.
Coding Assessment
Algorithms and problem solving.
Linked lists, arrays, and complexity analysis.
Ability to explain approach and optimize solutions.

Mandatory Skills
Java Backend Development
Microservices & Kafka
Database Design & SQL
Distributed Systems
Data Structures & Algorithms
Communication & System Design
Production Readiness for HealthTech/IoT

📌 Java Developer Gurugram (India)
🏢 Antino Labs
📍 India