Datagaps - Senior Java Developer - Spring Frameworks

Job Description :

We are looking for an experienced Senior Java Developer (3-8 years) to drive the design, development, and delivery of scalable enterprise-grade applications.

The ideal candidate will have strong expertise in Java, Spring Boot, Microservices, Messaging Systems, and exposure to Generative AI technologies including RAG frameworks and LLM integrations.

As a Technical Lead, you will be responsible for leading a team of engineers, defining technical architecture, ensuring engineering excellence, and collaborating with cross-functional stakeholders to build high-performance products.

Key Responsibilities :

• Lead the design and development of scalable, high-performance backend applications using Java and Spring Boot.
• Architect and implement Microservices-based solutions for enterprise products.
• Design secure authentication and authorization mechanisms using Spring Security, OAuth2, JWT, and SSO.
• Build event-driven architectures using Kafka and/or RabbitMQ.
• Develop and optimize batch processing solutions using Spring Batch.
• Drive adoption of AI/GenAI capabilities including LLM integrations, RAG architectures, vector databases, and prompt engineering best practices.
• Design and develop RESTful APIs and integration services.
• Ensure application performance, scalability, security, and reliability.
• Mentor and guide development teams through code reviews, design reviews, and best engineering practices.
• Collaborate with Product Managers, Architects, and DevOps teams to deliver business objectives.
• Participate in architecture discussions, estimation, sprint planning, and release management.
• Identify and resolve complex technical challenges and production issues.

Required Skills :

1. Core Technology :

• Strong experience in Java 8/11/17
• Expertise in Spring Boot, Spring Framework
• Hands-on experience with Spring Security, OAuth2, JWT, SSO
• Strong understanding of REST APIs and Microservices Architecture
• Experience with Spring Batch

2. Messaging & Distributed Systems :

• Hands-on experience with Kafka and RabbitMQ.
• Understanding of asynchronous communication and event-driven architecture.

3. AI / GenAI :

• Experience working with Generative AI applications, Large Language Models (LLMs), RAG (Retrieval-Augmented Generation), LangChain / LlamaIndex, Vector Databases (Pinecone, Weaviate, ChromaDB, etc.), and AI-enabled enterprise applications.

4. Database :

• Strong SQL skills.
• Experience with PostgreSQL, MySQL, Oracle, or SQL Server.
• Query optimization and performance tuning.

5. Software Engineering :

• Multithreading and Concurrency.
• Design Patterns and SOLID Principles.
• Data Structures & Algorithms.
• Low-Level and High-Level Design.
• Performance optimization and troubleshooting.

Role & Responsibilities :

Key Skills :

• Java, Kafka, Spring Boot, Data Structures, Spring Auth, SQL, Microservices, Multithreading, REST, Design Patterns, OOPS, RAG, JPA, Retrieval Augmented Generation.