Senior Software Engineer I (Java & JavaScript)

RELX Group; Greater London; On-site; GBP 65,000 - 95,000; Full time

Benefits offered by this job

Comprehensive Pension Plan

Generous vacation entitlement

Parental leave

Family care leave

Employee discounts

Employee Assistance Program

Job summary

Elsevier, a global leader in information and analytics, is seeking an experienced software professional to design and deliver complex identity platform components. The role involves mentoring, collaborating with cross-functional teams, and contributing to project plans and methodologies.

You will work with technologies across Java/J2EE, Node.js, React, and various identity providers, while supporting deployment pipelines, logging, and operational readiness in a fast-paced environment.

Qualifications

• Proficiency in software design across components and mentoring junior engineers.
• Experience with identity providers such as Keycloak or Auth0 and OIDC client setup.
• Familiarity with CI/CD pipelines, testing, and deployment practices.
• Knowledge of data storage subsystems and data modelling principles.

Responsibilities

• Interface with technical teams to finalize requirements and review specifications.
• Develop complex system components and complete bug fixes.
• Implement and guide continuous integration, delivery, and deployment practices.
• Collaborate with the team to translate user needs into software designs.
• Engage in pair programming to support learning and code quality.
• Maintain robust logging, instrumentation, and alerting for operations.

Skills

Java/J2EE

JavaScript

HTML

Node.js

React

XML

SQL

Windows

Unix

CI/CD

Test-driven development

Agile

Pair Programming

Tools

Keycloak

Auth0

Terraform

Docker

Kubernetes

Job description

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., 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.,

• 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 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.

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.

Working 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)