Lead Java Developer

EnIn Systems; California; On-site; USD 140,000 - 190,000; Full time

Job summary

ENIN Systems, INC is seeking a Senior Java Full Stack Developer to design, develop, and maintain scalable enterprise applications. You will work across backend services (Java, Spring Boot, Microservices) and frontend (Angular/React) while ensuring robust security, performance, and cloud deployment.

The role requires deep experience with REST APIs, databases (Oracle/MySQL/PostgreSQL/MongoDB), and modern DevOps practices in an Agile environment.

Qualifications

• 12-15 years of experience in Java/J2EE development.
• Strong proficiency in Java 8/11/17 or later.
• Hands-on experience with Spring, Spring Boot, Spring MVC, and Spring Security.
• Experience with Microservices architecture and RESTful services.
• Front-end experience with Angular or React.
• Experience with Hibernate, JPA, and JDBC.
• Experience with Kafka, RabbitMQ, or other messaging systems.
• Knowledge of Git, Maven/Gradle, Jenkins, and Docker.
• Experience with Kubernetes and cloud platforms.
• Strong OOP, design patterns, and data structures.

Responsibilities

• Design, develop, and maintain enterprise web applications using Java and related technologies.
• Build backend services and RESTful APIs with Spring Boot and microservices.
• Develop and integrate REST APIs and web services.
• Implement authentication, authorization, and security features.
• Work with relational and NoSQL databases (Oracle, MySQL, PostgreSQL, MongoDB).
• Write clean, testable code and perform unit/integration testing.
• Participate in CI/CD pipelines and DevOps practices.
• Deploy and manage applications on AWS, Azure, or Google Cloud.
• Collaborate with cross-functional teams in Agile/Scrum environments.
• Troubleshoot issues and optimize performance.

Skills

Java/J2EE

Spring Framework

Microservices

REST APIs

Front-end: Angular/React

Databases

CI/CD

Cloud: AWS/Azure/GCP

Education

Bachelor's or Master's in CS/IT/SE

Tools

Hibernate/JPA

JDBC

Kafka/RabbitMQ

Git

Maven/Gradle

Jenkins

Docker

Kubernetes

Job description

Job Title: Senior Java Full Stack Developer

Job Summary:

We are seeking an experienced Senior Java Full Stack Developer to design, develop, implement, and maintain scalable enterprise applications. The ideal candidate will have strong experience in Java, Spring Boot, Microservices, REST APIs, front-end technologies, and cloud platforms. The candidate will work closely with architects, business analysts, QA engineers, and DevOps teams to deliver high-quality software solutions.

Key Responsibilities:

• Design, develop, and maintain enterprise-level web applications using Java and related technologies.
• Develop backend services and RESTful APIs using Java, Spring Boot, and Microservices architecture.
• Develop and integrate REST APIs and web services.
• Implement application security, authentication, and authorization.
• Work with relational and NoSQL databases such as Oracle, MySQL, PostgreSQL, and MongoDB.
• Write clean, reusable, maintainable, and efficient code.
• Perform unit testing, integration testing, debugging, and code reviews.
• Work with CI/CD pipelines and DevOps tools for application deployment.
• Deploy and manage applications on AWS, Azure, or Google Cloud.
• Collaborate with cross-functional teams in Agile/Scrum environments.
• Troubleshoot production issues and improve application performance.

Required Skills:

• 12-15 years of experience in Java/J2EE application development.
• Strong proficiency in Java 8/11/17 or later.
• Hands-on experience with Spring, Spring Boot, Spring MVC, and Spring Security.
• Strong experience in Microservices architecture and RESTful web services.
• Front-end development experience with Angular or React.
• Experience with Hibernate, JPA, and JDBC.
• Experience with Kafka, RabbitMQ, or other messaging technologies.
• Knowledge of Git, Maven, Gradle, Jenkins, and Docker.
• Experience with Kubernetes and cloud platforms.
• Strong understanding of object-oriented programming, design patterns, and data structures.

Preferred Qualifications:

• Experience with AWS, Azure, or GCP.
• Knowledge of Kubernetes and containerization.
• Experience with Redis, Elasticsearch, or MongoDB.
• Familiarity with automated testing frameworks such as JUnit, Mockito, and Selenium.
• Experience with Agile development methodologies.
• Knowledge of application monitoring and performance optimization.

Education:

Bachelor's or Master's degree in Computer Science, Information Technology, Software Engineering, or a related field.

Soft Skills;

• Strong analytical and problem-solving skills.
• Excellent communication and collaboration abilities.
• Ability to work independently and within a team.
• Strong leadership and mentoring skills.
• Ability to manage multiple priorities and meet project deadlines.