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Greater London, England, United Kingdom
Hybrid
Senior Software Engineer I (Java & JavaScript)
Do you enjoy designing and developing scalable, high-performance applications using Java and JavaScript?
About the team:
You will join the Identity & Access Management team, which owns the authentication and authorisation infrastructure underpinning Elsevier’s global product suite.
We build and operate a highly available identity platform that integrates with multiple identity providers, entitlement services, and downstream APIs, running on AWS ECS and EKS.
About the role:
This position is performed by an experienced professional and will undertake difficult research, design, and software development assignments within a software functional area or product line, and provides direct input to project plans, schedules, and methodology in the development of cross-functional software products under the guidance of more senior members of the squad. This position performs software design - typically across multiple components; develops the skills of mentoring more junior members of the team and works with others to talk to users/customers and translates their requests into solutions.
Key Responsibilities:
Interface with other technical personnel or team members to finalize requirements
Write and review portions of detailed specifications for the development of complex system components
Complete complex bug fixes
Implement and guides other to continuous integration, delivery, and deployment software delivery practices
Identifies operational requirements for logging, instrumentation, and alerting and works with Senior II to ensure operational requirements are met
Proficient in implementing continuous integration, delivery, and deployment software delivery practices
Aware of operational requirements and implementation for logging, instrumentation, and alerting
Work closely with other development team members to understand product complex requirements and translate them into software designs.
Successfully implement development processes, coding best practices, and code reviews
Operate in various development environments (Agile, Waterfall, etc.) while collaborating with key stakeholders
Resolve complex intermediate technical issues as necessary
Pair Programming with squad members to support the learning and development of others
Develop skills to mentor less senior software developers on development methodologies and optimization techniques
Requirements:
Knowledge of software development methodologies (e.g., Agile, Waterfall)
Intermediate proficiency with data manipulation language, including optimization techniques
Intermediate understanding of normalized/dimensional data modelling principles
Intermediate knowledge of multiple data storage subsystems
Confident practitioner in development languages including but not limited to: Java/J2EE, JavaScript, JSP, HTML, Node.js, React, XML, SQL, Windows, Unix.
Experience with Keycloak, Auth0, or another identity provider, including realm configuration, authentication flows, and OIDC client setup.
Proficient research skills
Developing knowledge in Industry best practices in development
Knowledge in using and developing in applicable toolsets
Ability to interface competently with other technical personnel or team members to finalize requirements
Ability to work well with internal and external technology resources
Knowledge of test-driven development
Ability to write and review portions of detailed specifications for the development of complex system components
Ability to complete complex bug fixes
Good oral and written communication skills
Good to Have
Experience using AI-assisted development tools, such as Claude, GitHub Copilot, or Codex, for test authoring, stub generation, coverage analysis, or test-output investigation.
Experience treating AI-assisted tools as productivity accelerators within a quality engineering workflow while maintaining appropriate review and validation practices.
Familiarity with Keycloak or another identity provider, including realm configuration, authentication flows, and OIDC client setup.
Experience with Terraform or another infrastructure-as-code tool, including the ability to read infrastructure definitions and understand how configuration changes affect system behaviour and test coverage.
Experience working with Docker and Kubernetes.
Why Join Us?
Join our team and contribute to a culture of innovation, collaboration, and excellence. If you are ready to advance your career and make a significant impact, we encourage you to apply.
Work in a way that works for you
We promote a healthy work/life balance across the organization. We offer an appealing working prospect for our people. With numerous wellbeing initiatives, shared parental leave, study assistance and sabbaticals, we will help you meet your immediate responsibilities and your long-term goals.
Working flexible hours - flexing the times when you work in the day to help you fit everything in and work when you are the most productive.
Working for you
We know that your well-being and happiness are key to a long and successful career. These are some of the benefits we are delighted to offer:
Comprehensive Pension Plan
Generous vacation entitlement and option for sabbatical leave
Maternity, Paternity, Adoption and Family Care leave
Personal Choice budget
Internal communities and networks
Various employee discounts
Recruitment introduction reward
Employee Assistance Program (global)
About the business-
A global leader in information and analytics, we help researchers and healthcare professionals advance science and improve health outcomes for the benefit of society. Building on our publishing heritage, we combine quality information and vast data sets with analytics to support visionary science and research, health education, and interactive learning, as well as exceptional healthcare and clinical practice. At Elsevier, your work contributes to the world’s grand challenges and a more sustainable future. We harness innovative technologies to support science and healthcare to partner for a better world.






We know your well-being and happiness are key to a long and successful career. We are delighted to offer country specific benefits. Click here to access benefits specific to your location.
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