Java Developer
Confirmed on the employer's own hiring board on Sep 27, 2026. First seen by Alion on Sep 2, 2026.
Accepting applications until:
23 October 2026Job Description
Your Role: Java Developer - Digital Out of Home
Are you a Java Developer looking to be part of a team building cutting-edge, event-driven systems that power millions of digital advertising moments every day?
As a Java Developer within our Digital Out of Home (DOOH) team, you’ll help develop the programmatic advertising platform that powers all digital assets across Global’s outdoor estate - from large roadside signs to the Transport for London network. You’ll work with modern Java microservices (Java 21, Spring Boot) deployed on Kubernetes (EKS on AWS), using CI/CD pipelines (Jenkins, Terraform) and observability tools such as Prometheus and Grafana, on a platform that runs 24/7, 365 days a year.
Key Responsibilities
Feature Development & Platform Evolution (35%): Design and build new features for the DOOH platform, extending the architecture to support future capabilities on the roadmap.
Collaboration & Delivery (25%): Work closely with other developers, tech leads and product owners to understand requirements, discuss implementation options and ensure smooth integration across services.
Code Quality & Standards (20%): Follow established coding standards, development processes and best practices to produce clean, well-tested and maintainable code.
Deployment & Support (20%): Contribute to deploying services to production, troubleshooting issues and helping support and maintain production infrastructure as part of a team that owns its services.
What You’ll Love About This Role
Think Big: Help develop a world-class dynamic ad insertion platform that delivers personalised experiences for millions of people every day.
Own It: Be part of an agile team with the autonomy to solve complex challenges and make impactful technical decisions.
Keep it Simple: Build reliable, elegant solutions using a modern, scalable technology stack.
Better Together: Work in a close-knit, collaborative team, partnering with technical and product stakeholders in a supportive environment.
What Success Looks Like
In your first few months, you’ll have:
Contributed high-quality code, following good development practices and participating actively in code reviews.
Delivered new ad delivery capabilities that are live in production and seen by millions of people.
Helped support and maintain production infrastructure as part of the team’s “you build it, you run it” ethos.
Worked with the team to shape the product roadmap, balancing platform improvements with new feature requests from the business.
What You’ll Need
Java & Backend Skills: Strong experience with modern Java (ideally Java 21), Spring Boot and relational databases.
Event-Driven Systems: Experience with event-driven architectures and publish-subscribe systems such as Kafka or AWS SNS/SQS.
Quality Mindset: A focus on writing well-tested, maintainable and observable code.
DevOps & Cloud: Familiarity with CI/CD pipelines (e.g. Jenkins, Terraform) and cloud-based environments, ideally AWS EKS and Kubernetes.
Collaboration & Learning: A proactive, collaborative approach and a willingness to learn and work with other languages and technologies across Global’s ecosystem.