Graduate Java Developer at Datalex

Graduate Java Developer – Spring Boot, REST API, Cloud 

Location: Dublin or Manchester (Hybrid) 

Department: Engineering 

Reports to: Engineering Manager 

About the Role 

We are looking for a passionate and eager Graduate Java Developer to join our Engineering team. This is an excellent opportunity for someone with up to 2 years of experience (including internships or academic projects) to gain hands-on exposure to enterprise-level development, modern APIs, and cloud-native technologies. Our platform consists of multiple distributed services which process millions of requests per hour. You will work closely with experienced developers on projects that involve transitioning legacy systems to modern microservices using Spring Boot and AWS. 

Key Responsibilities 

API Development Support 

• Assist in building and testing REST APIs using Spring Boot 

• Support integration of new REST services with existing SOAP-based systems 

• Collaborate on API design using tools like Swagger Hub 

Cloud & Microservices Exposure 

• Gain hands-on experience with Docker, Kubernetes, or AWS ECS 

• Participate in the deployment and monitoring of microservices on AWS 

• Learn about Infrastructure as Code tools such as Terraform or CloudFormation 

Testing & Code Quality 

• Write basic unit and integration tests using JUnit and Mockito 

• Work with senior developers to debug and improve system reliability 

• Contribute to code reviews and continuous integration pipelines 

Team Collaboration & Learning 

• Participate in daily stand-ups, sprint planning, and agile ceremonies 

• Pair with mentors to grow technical and problem-solving skills 

• Demonstrate a proactive approach to learning new tools and technologies 

Required Skills & Qualifications 

• 0–2 years of Java development experience (including academic or internship projects) 

• Basic understanding of Spring Boot and RESTful API development 

• Familiarity with JSON and basic HTTP concepts 

• Willingness to learn about SOAP-to-REST migrations and microservices 

• Exposure to or interest in cloud platforms such as AWS 

• Experience with Git and basic CI/CD practices 

• Foundational knowledge of unit testing with JUnit or similar tools 

• Strong problem-solving skills and eagerness to learn in a team environment 

• Completed a BSc in Computer Science, Software Engineering, or a related discipline 

Preferred Skills 

• Familiarity with Swagger, Postman, or similar API tools 

• Exposure to Docker, Kubernetes, or AWS ECS during coursework or projects 

•  Interest in DevOps, monitoring, or cloud infrastructure 

• Understanding of authentication protocols (e.g., OAuth2, JWT) 

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 www.datalex.com or follow on LinkedIn @Datalex.