Senior Software Engineer I (Java & JavaScript)

RELX; Greater London; On-site; GBP 85,000 - 110,000; Full time

Benefits offered by this job

Comprehensive Pension Plan

Generous vacation entitlement

Maternity, Paternity, Adoption and_Fam

Employee Assistance Program (global)

Flexible work arrangements

Job summary

Elsevier is seeking an experienced software engineer to design and develop scalable authentication and authorisation solutions. You will work on an identity platform running on AWS ECS/EKS, integrating with multiple identity providers, and supporting global product suites.

You will contribute across the software life cycle, mentor peers, and collaborate with cross-functional teams to translate user needs into robust software, operating in agile or hybrid environments in Greater London and beyond.

Qualifications

• Proficient in Agile or Waterfall development processes.
• Experience with data manipulation and optimization techniques.
• Knowledge of relational data modelling concepts.
• Understanding of multiple data storage subsystems.

Responsibilities

• Collaborate with stakeholders to finalize requirements and translate them into software designs.
• Write and review detailed specifications for complex system components.
• Complete and verify bug fixes in a timely manner.
• Lead CI/CD and deployment practices across environments.
• Define and implement logging, instrumentation, and alerting for operations.
• Mentor junior developers and participate in code reviews.

Skills

Java/J2EE

JavaScript

Node.js

React

SQL

HTML

Tools

Keycloak

Auth0

Docker

Kubernetes

Terraform

AWS

Job description

Do you enjoy designing and developing scalable, high-performance applications using Java and 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.

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?

Work in a way that works for you

• 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

Benefits

• 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)

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

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.