Senior Core Java Developer | REST APIs + Microservices

Centillion Infotech LLC; California (MO); On-site; USD 140,000 - 190,000; Full time

Job summary

Centillion Infotech LLC in Alpharetta, GA, and Menlo Park, CA, seeks a Sr. Core Java Developer / Lead to design, develop, test, and maintain high-performance Java applications.

You will lead technical tasks, mentor juniors, and collaborate with cross-functional teams to deliver scalable software solutions. The role requires 10+ years of Java experience, strong core Java fundamentals, RESTful APIs, multithreading, and familiarity with Spring, databases, and CI/CD pipelines.

Qualifications

• 10+ years of experience in Java software development.
• Bachelor's degree in Computer Science, Engineering, Information Technology, or related field.
• Strong knowledge of Core Java, including object-oriented programming, collections, multithreading, and memory management.
• Experience developing RESTful APIs and backend services.
• Familiarity with relational databases and SQL/JDBC.
• Experience with Maven/Gradle and Git.
• Understanding of unit testing using JUnit/Mockito.
• Knowledge of Agile/Scrum methodologies.

Responsibilities

• Design, develop, and maintain applications using Core Java.
• Write clean, efficient, reusable, and maintainable code.
• Develop multithreaded, high-performance applications.
• Build and consume RESTful web services and APIs.
• Collaborate with cross-functional teams and participate in code reviews.
• Integrate applications with CI/CD pipelines and deployment processes.
• Troubleshoot performance issues, memory leaks, and production defects.

Skills

Core Java

Multithreading

RESTful APIs

JVM tuning

Maven/Gradle

SQL/JDBC

Git

Unit testing

Linux/Unix

Design patterns

Education

Bachelor's degree in CS or related

Tools

Spring Framework

Spring Boot

Docker

Kubernetes

Kafka

Jenkins

AWS

Job description

Centillion Infotech LLC in Alpharetta, GA, and Menlo Park, CA, seeks a Sr. Core Java Developer / Lead to design, develop, test, and maintain high-performance Java applications.

You will lead technical tasks, mentor juniors, and collaborate with cross-functional teams to deliver scalable software solutions. The role requires 10+ years of Java experience, strong core Java fundamentals, RESTful APIs, multithreading, and familiarity with Spring, databases, and CI/CD pipelines.