Software Engineer III - Typescript/React JS/Node

RELX INC; Greater London; Hybrid; GBP 60,000 - 80,000; Full time

Job summary

A global information leader is seeking a Software Engineer III to develop high-quality, responsive user interfaces using TypeScript and React. You will collaborate with cross-functional teams, ensuring performance and accessibility in web applications. The ideal candidate possesses robust experience in frontend development, particularly with modern JavaScript frameworks and cloud deployment. This position offers flexible working hours and comprehensive benefits, promoting a healthy work-life balance.

Benefits

Comprehensive Pension Plan

Generous vacation entitlement

Flexible working hours

Various employee discounts

Employee Assistance Program

Qualifications

• 3+ years of professional experience in Frontend or Full-Stack Software Engineering.
• Strong hands-on experience with TypeScript and React.
• Ability to write clean and maintainable code.

Responsibilities

• Build responsive UI components with TypeScript and Next.js.
• Collaborate with backend engineers to integrate APIs.
• Participate in code reviews and maintain quality.

Skills

TypeScript

React

Node.js

JavaScript (ES6+)

Performance Optimization

UI/UX best practices

Web Accessibility Standards

Education

Bachelor’s degree in Computer Science or Engineering

Tools

AWS Services

Lighthouse

Job description

Software Engineer III – (Typescript/React JS/Node)

About the team

The SciVal Development Team is a cross-functional group comprising Frontend, Backend, and Quality Engineers who work closely together. The team collaborates closely with UX and Product to design, build, and deliver high-quality features efficiently and reliably.

SciVal is a data-driven product that provides academic and research metrics to customers, enabling insight, analysis, and informed decision-making. The team focuses on building scalable, reliable solutions while continuously improving usability, performance, and data accuracy.

About the role

The Software Engineer III performs moderately complex design and development work across modern frontend applications. This role focuses on building accessible, responsive, and performant user interfaces using TypeScript, React/Next.js, and associated tooling. The engineer contributes to reusable UI components, partners with backend and product teams, and ensures high-quality user experiences across browsers and devices.

Key responsibilities

• Build responsive, accessible, and performant UI components using TypeScript and Next.js.
• Implement front-end features with performance and Web Vitals targets in mind.
• Contribute to shared component libraries, ensuring consistency, usability, and adherence to design system standards.
• Collaborate with backend engineers to integrate REST APIs and Node.js services.
• Monitor, analyse, and optimize Core Web Vitals to improve user experience and ensure SEO readiness.
• Write unit, integration, and UI automation tests to maintain quality and prevent regressions.
• Participate in code reviews, maintain clean, maintainable, and performant code.
• Debug and resolve complex issues related to rendering, performance, accessibility, and cross-browser compatibility.
• Assist in deploying, monitoring, and troubleshooting frontend applications hosted on AWS.
• Stay current with emerging frontend technologies and best practices.
• Work effectively within Agile or hybrid development environments.
• Perform all other duties as assigned.

Requirements

• Good years of professional experience in Frontend or Full‑Stack Software Engineering, with a bachelor’s degree in computer science, Engineering, or equivalent practical experience.
• Strong hands‑on experience with TypeScript, modern JavaScript (ES6+), React, Next.js, and Node.js.
• Proven ability to build responsive, mobile‑first, and accessible user interfaces with a solid understanding of UI/UX best practices.
• In‑depth knowledge of Next.js features, including server‑side rendering (SSR), static site generation (SSG), and incremental static regeneration (ISR).
• Solid understanding of browser fundamentals, DOM behaviour, rendering lifecycles, hydration, and frontend performance optimization.
• Strong familiarity with web accessibility standards such as WCAG, semantic HTML, ARIA roles, and keyboard navigation.
• Experience working with or contributing to component libraries and design systems.
• Strong understanding of Core Web Vitals (LCP, FID, CLS, INP, TTFB) and performance monitoring using tools like Lighthouse, Webpage Test, Chrome DevTools, and RUM solutions.
• Experience applying performance optimization techniques such as code splitting, caching, image optimization, prefetching, and minimizing render‑blocking resources.
• Hands‑on experience using Node.js for API routes, middleware, and backend integrations, with a solid understanding of REST APIs, data‑fetching strategies, and error handling.
• Familiarity with deploying and supporting cloud‑hosted web applications using AWS services such as CloudFront, S3, Lambda, API Gateway, and Amplify.
• Ability to write clean, maintainable, idiomatic, and well‑tested code following established engineering best practices.

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
• Home, office, or commuting allowance.
• Generous vacation entitlement and option for sabbatical leave
• Maternity, Paternity, Adoption, and Family Care leave
• Flexible working hours
• 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 (https://www.relx.com/careers/join-us/benefits) to access benefits specific to your location.

We are committed to providing a fair and accessible hiring process. If you have a disability or other need that requires accommodation or adjustment, please let us know by completing our Applicant Request Support Form or please contact 1-855-833-5120.

We are an equal opportunity employer: qualified applicants are considered for and treated during employment without regard to race, color, creed, religion, sex, national origin, citizenship status, disability status, protected veteran status, age, marital status, sexual orientation, gender identity, genetic information, or any other characteristic protected by law.

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EEO Know Your Rights.

RELX is a global provider of information-based analytics and decision tools for professional and business customers, enabling them to make better decisions, get better results and be more productive.

Our purpose is to benefit society by developing products that help researchers advance scientific knowledge; doctors and nurses improve the lives of patients; lawyers promote the rule of law and achieve justice and fair results for their clients; businesses and governments prevent fraud; consumers access financial services and get fair prices on insurance; and customers learn about markets and complete transactions.

Our purpose guides our actions beyond the products that we develop. It defines us as a company. Every day across RELX our employees are inspired to undertake initiatives that make unique contributions to society and the communities in which we operate.