Senior Core Java Engineer - Remote Backend Expert

Centillion Infotech LLC; Athens (GA); Remote; USD 120,000 - 180,000; Full time

Job summary

Centillion Infotech LLC is seeking a seasoned Core Java Developer to design, develop, test, and maintain high-performance Java applications. The role emphasizes strong OO design, multithreading, data structures, and enterprise development practices.

You will collaborate with architects, QA, DevOps, product managers, and stakeholders to deliver robust software solutions. The position offers flexible work-from-home options and a focus on modern Java platforms.

Qualifications

• Bachelor’s degree in Computer Science, Engineering, Information Technology, or a related field.
• 10+ years of experience in Java software development.
• Strong knowledge of Core Java, including: Object-oriented programming, Collections framework, Exception handling, Generics, Multithreading and concurrency, Java I/O and NIO, Streams and lambda expressions, Java memory management, Garbage collection.
• Experience developing RESTful APIs and backend services.
• Knowledge of relational databases such as Oracle, SQL Server, MySQL, or PostgreSQL.

Responsibilities

• Design, develop, and maintain applications using Core Java.
• Write clean, efficient, reusable, and maintainable code.
• Apply object-oriented programming principles and software design patterns.
• Develop multithreaded, concurrent, and high-performance applications.
• Work with Java collections, exception handling, generics, streams, and lambda expressions.
• Build and consume RESTful web services and APIs.
• Develop modular and scalable application components.
• Implement business logic, validation, error handling, and transaction management.
• Work with relational and NoSQL databases.
• Write efficient SQL queries and optimize database interactions.
• Perform unit, integration, functional, and regression testing.
• Troubleshoot application issues, memory leaks, performance bottlenecks, and production defects.
• Participate in code reviews and ensure adherence to coding standards.
• Collaborate with cross-functional teams to understand requirements and deliver solutions.
• Contribute to technical design documents and implementation plans.
• Integrate applications with CI/CD pipelines.
• Support application deployment, monitoring, and production issue resolution.
• Participate in Agile ceremonies, sprint planning, daily stand-ups, reviews, and retrospectives.
• Stay current with Java releases, development practices, tools, and industry trends.

Skills

Core Java

OOP

Multithreading

Data Structures

Design Patterns

REST APIs

SQL/NoSQL

JUnit/Mockito

Git

Agile

Education

Bachelor’s degree in CS or related

Tools

Maven

Gradle

Spring

Spring Boot

JDBC

ORM

Git

JUnit

Job description

Centillion Infotech LLC is seeking a seasoned Core Java Developer to design, develop, test, and maintain high-performance Java applications. The role emphasizes strong OO design, multithreading, data structures, and enterprise development practices.

You will collaborate with architects, QA, DevOps, product managers, and stakeholders to deliver robust software solutions. The position offers flexible work-from-home options and a focus on modern Java platforms.