Java Developer (Manchester)

Overview

Location :

Dublin or Manchester (Hybrid)

Reports to : Engineering Manager

About the Role

We are looking for a skilled and motivated Java Developer to contribute to the modernization of our backend architecture.

You will support the transformation of SOAP-based services into RESTful microservices using Spring Boot, working in a cloud-native environment built on Docker, Kubernetes (or ECS), and AWS.

Our platform consists of multiple distributed services which process millions of requests per hour.

This is a great opportunity to deepen your experience in scalable systems and modern development practices while learning from senior engineers.

Responsibilities

Assist in designing and implementing REST APIs using Spring Boot and SwaggerHub

Contribute to the transformation of SOAP / XML to REST / JSON for backend services

Support API development and integration in a microservices environment

Contribute to containerized microservice development using Docker and Kubernetes, or AWS ECS

Participate in deploying and managing services on AWS cloud infrastructure

Collaborate on integrating with API Gateway, Lambda, and IaC tools like CloudFormation

Testing & Quality : Write and maintain integration and unit tests using tools such as JUnit and Mockito

Assist with debugging API issues and ensuring accurate data transformations

Work with the team to implement CI / CD and automation practices

Performance, Caching & DevOps : Support performance tuning and caching solutions (e.g., Redis)

Contribute to stateless microservice design and improvements

Help monitor application health using tools like Prometheus or ELK Stack

Work closely with senior engineers, QA, and product teams

Actively participate in agile ceremonies and sprint planning

Engage in peer reviews, mentorship opportunities, and continuous learning

Qualifications

3+ years in Java development with Spring Boot

Understanding of REST architecture principles and best practices

Experience building REST APIs and integrating with JSON-based services

Exposure to SOAP-to-REST migration or service transformation projects

Hands-on with Docker and familiarity with Kubernetes or AWS ECS

Basic knowledge of Infrastructure as Code (IaC) tools like Terraform or CloudFormation

Familiarity with relational and NoSQL databases : PostgreSQL, MySQL, MongoDB, or Redis

Experience with CI / CD pipelines and tools such as Jenkins or GitLab CI

Proficiency in unit and integration testing (e.g., JUnit, Mockito)

Understanding of authentication protocols like OAuth2 or JWT

Working knowledge of Java 8+

Preferred Skills

Experience with API Gateways (e.g., AWS API Gateway)

Familiarity with messaging systems like Kafka or RabbitMQ

Basic understanding of serverless technologies (e.g., AWS Lambda)

Interest in evolving DevOps, automation, and cloud-native best practices

About Datalex

Datalex\'s purpose is to transform airline retail.

Datalex is a market leader in airline retail technology, offering unique products that enable airlines to drive revenue and profit as digital retailers.

Datalex has a strong track record of delivering digital retail transformation for progressive airline brands worldwide, including Aer Lingus, easyJet, JetBlue Airways, Air China, Edelweiss, Air Transat, and Air Macau.

The Group is headquartered in Dublin, Ireland, and maintains offices across Europe, the USA and China.

In 2024, Datalex was awarded the \'Great Place to Work\' and \'Best Workplaces in Tech\' certifications.

Datalex plc is a publicly listed company, on Euronext Growth, Dublin.

Learn more at or follow on LinkedIn @Datalex.

Application & Eligibility

Are you currently based in the country of employment?

Do you have eligibility to work and reside in the country of employment?

Datalex offers a hybrid work model.

Are you willing to work from the office at least two days per week?

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