Java Developer Contract

Infoplus Technologies UK Limited; Dublin; On-site; EUR 70,000 - 100,000; Full time

Job summary

Infoplus Technologies UK Limited seeks a skilled Core Java developer to write clean, modular, maintainable code and to apply data structure knowledge to day-to-day tasks. The role emphasizes RESTful APIs, microservices, and secure API design with JWT/OAuth2 in a modern AWS environment.

You will work with Java/J2EE, Spring, Spring Batch, AWS EKS, Oracle RDS, and API gateways while also contributing to frontend tasks using React, HTML5, and CSS3. Strong testing and DevOps familiarity are expected.

Qualifications

• 5+ years design and development of RESTful APIs and microservices with Java/J2EE and Spring.
• Frontend development experience with React JS, HTML5 and CSS3.
• Experience in API integration and API gateway security (JWT, OAuth2).
• Familiarity with unit testing using Mockito/JUnit and basic QA tooling.
• Knowledge of SQL Server/Oracle DB, stored procedures and Flyway migrations.
• Experience with Linux/Unix, AWS, CI/CD pipelines, and DevOps practices.

Skills

RESTful APIs

Microservices

Java/J2EE

Spring framework

Spring Batch

AWS EKS

RDS Oracle DB

Apigee/API Gateway

Frontend development

React JS

HTML5

CSS3

Responsive design

REST API security (JWT, OAuth2)

Swagger / YAML API docs

JUnit / Mockito

JUnit

End-to-end test frameworks

JMeter

SQL / Stored Procedures

RDS Oracle DB

Unix / Linux

AWS

Jira

Git/SVN

Jenkins

CI/CD

Maven

Hibernate ORM

MS SQL Server

Flyway

PDF generation (iText)

HTML/CSS for PDFs

TypeScript

Redux

Tools

React

Angular

Jira

Git

SVN

Jenkins

Maven

Swagger

Kubernetes

Job description

We are looking for highly skilled Core Java developer who will work on writing clean, reusable, modular, and maintainable code that is easy to understand and easy to change. In-depth knowledge of data structures and algorithms is required. This is so that you can apply them better in day-to-day tasks, and so you know which one to choose over the other, especially when using frameworks like the collection framework.

Experience and Skills Required:

• Mandatory 5+ years of hands-on experience in design and development of RESTful APIs and Microservices using technology stack: Java/J2EE, Spring framework, Spring Batch, AWS Elastic Kubernetes Services (EKS), RDS Oracle DB, Apigee/API Gateway.
• 5+ Years experience & expertise in frontend development using React JS, HTML5, CSS3 and Responsive web application development.
• Must have experience in Rest API integrations.
• Experience in API layer security (e.g., JWT, OATH2), API logging, API testing, creating REST API documentation using Swagger and YAML or similar tools desirable.
• Experience in TDD, writing unit test cases in JUnit. Unit Test Frameworks: Mockito (Java), Junit (Java);
• Nice to have exposure to End-to-end Test Frameworks: Fitnesse/Test API, Protractor; Functional Testing: Cucumber; Performance Test Tools: JMeter
• Proficient in SQL and Stored Procedures such as in RDS Oracle DB
• Experience with Unix, Linux Operating Systems preferably on AWS environment.
• Knowledge of Jira, Git/SVN, Jenkins, DevOps, CI/CD, Build tools - Maven, Jenkins
• Knowledge of Spring framework – (4.x), Hibernate ORM – 4.x
• Knowledge of Database – MS SQL Server
• Knowledge of SQL Versioning tool – flyway
• Apache Active MQ –PDF generation libraries - iText, flying saucer, html, CSS (for pdf 1.x)
• Skill sets and experience in open-source frontend frameworks such as React and Angular is highly desirable.
• Knowledge of Java script libraries like typescript, redux,