Senior Java Software Engineer

Global Business Ser. 4u; New York (NY); On-site; USD 120,000 - 180,000; Full time

Job summary

Global Business Ser. 4u in New York is seeking an experienced Senior Java Developer to design, develop, and optimize scalable backend services. You will write clean, efficient Java code, implement RESTful APIs, and contribute to a high-performance microservices architecture.

The role demands hands-on coding, strong problem-solving abilities, and the ability to troubleshoot in production. You will collaborate across teams to deliver reliable, secure, and maintainable software solutions in a

Qualifications

• Strong Core Java, including Java 8+ and concurrency.
• Experience with Spring Boot, Spring MVC, and Spring Security.
• Experience building microservices and RESTful APIs.

Skills

Core Java

Java 8+

Multithreading

JVM

Spring Boot

Spring MVC

Spring Security

Microservices

REST APIs

Data structures

Algorithms

SQL databases

JUnit

Mockito

Maven/Gradle

Git

Performance tuning

AWS

Azure

Docker

Kubernetes

Tools

Docker

Kubernetes

AWS

Azure

Job description

We are looking for an experienced Senior Java Developer with strong hands‑on coding skills, excellent problem‑solving abilities, and experience building scalable, high‑performance applications. The ideal candidate should have deep knowledge of Core Java, Spring Boot, microservices, and REST APIs, with the ability to write clean, efficient, and maintainable code.

Required Skills

• Strong expertise in Core Java, Java 8+, Collections, Multithreading, Concurrency, and JVM.
• Hands‑on experience with Spring Boot, Spring MVC, and Spring Security.
• Strong experience developing Microservices and RESTful APIs.
• Excellent coding, debugging, data structures, and algorithms skills.
• Experience with SQL databases such as Oracle, PostgreSQL, or MySQL.
• Proficiency in JUnit, Mockito, Maven/Gradle, and Git.
• Experience with performance tuning, troubleshooting, and production support.
• Knowledge of cloud platforms (AWS/Azure), Docker, and Kubernetes is a plus.

Preferred Candidate

• Strong hands‑on coding experience in enterprise applications.
• Ability to solve complex technical problems and optimize application performance.
• Experience designing scalable, reliable, and secure backend systems.
• Excellent analytical and communication skills.

Note: Candidates must demonstrate strong practical coding abilities and should be comfortable with hands‑on technical coding interviews.