▷ (10/1/2025 A) Senior Java Developer (Manchester)

2 weeks ago


Dublin Pike, Ireland Datalex Full time

Location: Dublin or Manchester (Hybrid)
Reports to: Engineering Manager
Overview We are seeking a highly skilled Senior Java Developer to lead the modernization of our legacy monolithic architecture by decomposing SOAP-based services into stateless RESTful microservices. You will be responsible for transitioning our legacy SOAP-based services to RESTful, scalable microservices using Spring Boot, deployed in AWS via Docker and Kubernetes (or ECS). This is a high-impact role where your expertise will directly influence system scalability, performance, and developer experience.
Responsibilities Apply domain-driven design and stateless principles to migrate business functionality from the monolith to a modern architecture
Lead the decomposition of tightly coupled SOAP services into independently deployable microservices
Design and implement scalable, stateless REST APIs using Spring Boot and SwaggerHub
Lead the transformation from SOAP/XML to REST/JSON for internal and external APIs
Serve as the front controller for managing requests and orchestrating backend service flows
Develop and deploy containerized microservices using Docker and Kubernetes, or AWS ECS
Implement cloud-native architecture patterns for high availability, fault tolerance, and scalability in AWS
Integrate with API Gateway, Lambda, and CloudFormation or other IaC tools for provisioning infrastructure
Testing & Quality: Write comprehensive integration, unit, and API tests using JUnit, Mockito, Postman, etc.
Debug REST-to-SOAP interactions to ensure seamless migration and data integrity
Champion CI/CD and test automation practices across the team
Performance, Caching & DevOps: Optimize performance with caching solutions (e.g., Redis, Memcached)
Maintain stateless service architecture principles
Contribute to observability with Prometheus, Grafana, and ELK Stack
Collaborate closely with product, QA, DevOps, and platform teams
Mentor junior engineers and support technical decision-making across sprints
Advocate for engineering excellence, TDD, and best practices in software delivery
Required Skills & Experience Experience leading end-to-end migration projects from SOAP-based systems to scalable, domain-aligned microservices
Proven experience decomposing monolithic applications and rebuilding them as RESTful microservices
7+ years in Java development with strong expertise in Spring Boot
Strong knowledge of REST architecture principles and best practices
Proven experience designing and building REST APIs at scale
Deep understanding of SOAP-to-REST transformations
Hands-on with Docker and either Kubernetes or AWS ECS (Elastic Container Service)
Proficiency in one or more Infrastructure as Code (IaC) frameworks: Terraform, AWS CloudFormation, or AWS CDK
Proficient with CI/CD tools (e.g., Jenkins, GitLab CI, AWS CodePipeline)
Strong testing discipline with tools like JUnit, Mockito, Postman, or Karate
Experience with OAuth2, JWT, OpenID Connect
Familiarity with Java 8+ and awareness of Java 11/17 improvements
Preferred Skills Experience with API Gateways (AWS API Gateway, Kong)
Knowledge of Kafka, RabbitMQ
Experience with serverless architectures (e.g., AWS Lambda)
Broader experience with Infrastructure as Code tooling and 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 www.datalex.com or follow on LinkedIn @Datalex.

#J-18808-Ljbffr


  • Java Developer

    2 weeks ago


    Dublin, Ireland Datalex Full time

    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...

  • Java Developer

    2 weeks ago


    Dublin, Ireland Datalex Full time

    OverviewLocation:Dublin or Manchester (Hybrid)Reports to:Engineering ManagerAbout the RoleWe 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...

  • Senior Java Developer

    2 weeks ago


    Dublin, Ireland Datalex Full time

    Location:Dublin or Manchester (Hybrid)Reports to:Engineering ManagerOverviewWe are seeking a highly skilled Senior Java Developer to lead the modernization of our legacy monolithic architecture by decomposing SOAP-based services into stateless RESTful microservices.You will be responsible for transitioning our legacy SOAP-based services to RESTful, scalable...


  • Dublin, Ireland Datalex Full time

    OverviewGraduate Java Developer – Spring Boot, REST API, CloudLocation:Dublin or Manchester (Hybrid)Reports to:Engineering ManagerAbout the RoleWe 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...


  • Dublin, Ireland Datalex Full time

    Overview Graduate Java Developer – Spring Boot, REST API, Cloud Location: Dublin or Manchester (Hybrid) 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...


  • Dublin, Ireland Version 1 Full time

    Java has been a key technology throughout our company history, and our Java Practice has been responsible for delivering some of the largest enterprise to enterprise systems as well as business-critical solutions to a number of sectors across a wide range of platforms, operating systems, open-source components and databases. We encourage interest from...


  • Dublin Pike, Ireland Version 1 Full time

    1 day ago Be among the first 25 applicants Company Description Version 1 has celebrated over 28 years in Technology Services and continues to be trusted by global brands to deliver solutions that drive customer success. Our expertise enables our customers to navigate the rapidly changing Digital-First world we live in. We foster strong partnerships with...


  • Dublin Pike, Ireland Datalex Full time

    Software Development Tech Lead (Manchester) Location: Dublin or Manchester (Hybrid) We have a vacancy for an experienced, highly motivated Software Development Tech Lead to work in an exciting and dynamic software engineering environment. We want to see candidates who have a track record in developing high quality software, working within tight deadlines,...


  • Dublin, Ireland Datalex Full time

    Software Development Tech Lead (Manchester) Location: Dublin or Manchester (Hybrid) We have a vacancy for an experienced, highly motivated Software Development Tech Lead to work in an exciting and dynamic software engineering environment. We want to see candidates who have a track record in developing high quality software, working within tight deadlines,...

  • Senior Java Developer

    4 weeks ago


    Dublin, Dublin City, Ireland Datalex Full time

    OverviewSenior Java Developer – Spring Boot, REST API, Kubernetes/AWS. Location: Dublin or Manchester (Hybrid). Department: Engineering. Reports to: Engineering Manager.About The RoleWe are seeking a highly skilled Senior Java Developer to lead the modernization of our legacy monolithic architecture by decomposing SOAP-based services into stateless RESTful...