Senior Core Java Lead: Scalable Backend & Microservices

Congensys Corp; Alpharetta (GA); On-site; USD 130,000 - 180,000; Full time

Job summary

Congensys Corp seeks a Senior Core Java Developer/Lead to design, develop, test, and maintain high-performance enterprise Java applications. The candidate will apply expertise in Core Java, OOP, multithreading, REST APIs, Spring Boot, databases, and modern enterprise development practices.

The ideal candidate will have 10+ years of experience, deep knowledge of Java 8+ features, and hands-on experience with microservices, CI/CD, and agile methodologies.

Qualifications

• 10+ years of Java software development experience.
• Strong expertise in Core Java / Java SE.
• Proficient in Object-Oriented Programming and Design Patterns.
• Experience with multithreading and concurrency.
• Hands-on with RESTful APIs and backend services.
• Proficient in Spring, Spring MVC, Spring Boot.
• Strong SQL knowledge and relational databases.
• Experience with build tools (Maven/Gradle) and version control (Git).

Responsibilities

• Design, develop, and maintain scalable Java applications.
• Build multithreaded, high-performance software components.
• Develop and consume RESTful APIs.
• Collaborate with teams across the stack and QA.
• Contribute to architectural decisions and code reviews.
• Support deployment, monitoring, and production issue resolution.

Skills

10+ years Java experience

Core Java / Java SE

OOP & design patterns

Multithreading & concurrency

REST APIs

Spring / Spring Boot

Databases & SQL

Maven/Gradle

Git

JUnit/Mockito

Agile/Scrum

Debugging & problem-solving

Tools

Maven/Gradle

Git

JUnit

Job description

Congensys Corp seeks a Senior Core Java Developer/Lead to design, develop, test, and maintain high-performance enterprise Java applications. The candidate will apply expertise in Core Java, OOP, multithreading, REST APIs, Spring Boot, databases, and modern enterprise development practices.

The ideal candidate will have 10+ years of experience, deep knowledge of Java 8+ features, and hands-on experience with microservices, CI/CD, and agile methodologies.