Senior Java Developer

Accepting applications until: 27 February 2026 Job Description

Are you an experienced Senior Java Developer looking to lead a team building cutting‑edge, event‑driven systems that power millions of digital advertising moments every day?

As a Senior Java Developer within our Digital Out of Home (DOOH) team, you’ll play a key role in developing the programmatic advertisement platform that powers all digital assets across Global’s outdoor estate — from large roadside signs to the Transport for London network.

You’ll lead a talented agile team working with modern Java microservices (
Java 21, Spring Boot
), deployed on Kubernetes (
EKS on AWS
), with CI/CD pipelines using Jenkins and Terraform, and observability through Prometheus and Grafana. This platform sits at the heart of Global’s outdoor advertising ecosystem and must be available 24/7, 365 days a year.

We’re a close‑knit, collaborative team that values creativity, technical excellence, and working together to deliver meaningful impact.

As a Senior Java Developer at Global, your responsibilities will include:

• Designing and developing new features and enhancements (16.6%), evolving the platform’s architecture to support future growth.
• Collaborating across teams (16.6%), working closely with developers, tech leads, and product owners to shape solutions and ensure smooth integration across our services.
• Leading best practices (16.6%), maintaining high coding standards and promoting good development practices through code reviews and mentorship.
• Contributing to CI/CD and Dev Ops processes (16.6%), helping to maintain and improve pipelines, deployments, and production reliability.
• Supporting production environments (16.6%), monitoring and maintaining the services you build to ensure performance and availability.
• Driving innovation (16.6%), continuously improving how we design, deliver, and scale our digital ad platform.

• Think Big: Develop a world‑class dynamic ad insertion platform that delivers personalised experiences for millions of people every day.
• Own It: Lead an agile team with the autonomy to solve complex challenges and make impactful decisions.
• Keep It Simple: Build reliable, elegant solutions using modern technologies that scale with Global’s growth.
• Better Together: Work closely with both technical and product stakeholders in a supportive, collaborative environment.

In your first few months, you’ll have:

• Delivered new ad platform capabilities seen by millions across the UK.
• Helped shape the product roadmap, balancing platform improvements with business‑driven features.
• Supported and maintained production infrastructure, taking ownership of the services you and your team build.
• Contributed to code reviews and demonstrated strong development practices.

We’re looking for someone who is proactive, collaborative, and excited by solving complex technical problems. You’ll bring:

• Strong experience in Java 17/21
  , Spring Boot
  , and RDBMS
  .
• Experience with event‑driven architectures and publish‑subscribe systems such as Kafka or AWS SNS/SQS.
• A focus on writing well‑tested, maintainable code
  .
• Familiarity with CI/CD pipelines (Jenkins/Terraform) and cloud‑based environments (AWS EKS, Kubernetes).
• A willingness to learn and work with other languages and technologies across Global’s ecosystem.