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Senior Frontend Engineer (React)

00070320341

Senior Frontend Engineer (React / JavaScript)

Burgess Hill, United Kingdom | Hybrid | ⏱️ Full-Time

About the Role

As a Senior Frontend Engineer, you will make an impact by designing, developing, and delivering high-quality, data-driven web applications that power innovative digital products. You will be a valued member of a high-performance distributed engineering team and work collaboratively with cross-functional stakeholders, product managers, and fellow engineers to build scalable, performant UI solutions that meet real business and compliance needs.

This role offers a compelling blend of hands-on technical excellence and engineering leadership — ideal for a seasoned engineer who thrives on both building great software and growing the talent around them.

In This Role, You Will:

  • Architect and develop scalable, high-quality frontend applications using React, TypeScript, JavaScript (ES6+), HTML5, and CSS3 — applying React Hooks and functional component patterns to deliver fast, accessible, and responsive user experiences.
  • Lead and implement state management strategies using Redux and/or Context API, and develop data-driven UI components and dynamic forms — including JSON-schema based forms — to satisfy complex business and compliance requirements.
  • Champion quality by writing and maintaining automated tests using React Testing Library or equivalent frameworks, conducting code reviews, and driving adherence to engineering best practices and performance standards across the team.
  • Integrate and connect frontend applications with RESTful APIs and web services, ensuring seamless, reliable data exchange using JSON and related technologies.
  • Mentor and elevate junior and mid-level engineers, contributing to the growth and effectiveness of a distributed engineering team whilst actively participating in agile ceremonies — including sprint planning, estimation, and retrospectives.

What You Must Have to Be Considered

  • Strong hands-on experience with React, TypeScript, and JavaScript (ES6+), including React Hooks and functional component patterns, along with proficiency in HTML5 and CSS3.
  • Strong experience with state management solutions such as Redux and/or Context API, and developing data-driven UIs and dynamic forms (including JSON-schema based forms).
  • Strong experience writing and maintaining automated tests using React Testing Library or comparable testing frameworks, with a consistent focus on code quality and performance.
  • Strong experience integrating frontend applications with RESTful APIs, with solid familiarity with JSON and web service technologies.
  • Good experience working within agile development environments, contributing to code reviews, sprint ceremonies, and continuous improvement of engineering standards.
  • Experience building, mentoring, and supporting high-performance distributed engineering teams.
  • A Bachelor of Science or Engineering, specialising in Information Technology, Computer Science, or Software Engineering — or equivalent practical experience.

Additional eligibility requirements:

· Candidates must currently reside in the UK.

· Candidates must be available to start within 4 weeks of receiving an offer.

These Will Help You Stand Out

  • Good knowledge of Java or other backend technologies and frameworks, enabling more informed full-stack collaboration.
  • Experience with cloud technologies on any major cloud platform (AWS, Azure, or GCP).
  • Experience with DevOps practices and tooling, particularly GitHub Actions and CI/CD pipeline management.
  • Professional certifications in software engineering, architecture, or product management.



We're excited to meet people who share our mission and can make an impact in a variety of ways. Don't hesitate to apply, even if you only meet the minimum requirements listed. Think about your transferable experiences and unique skills that make you stand out as someone who can bring new and exciting things to this role.

About Cognizant: 
Cognizant (Nasdaq: CTSH) is an AI Builder and technology services provider, bridging the gap between AI investment and enterprise value by building full-stack AI solutions for our clients. Our deep industry, process and engineering expertise enables us to build an organization’s unique context into technology systems that amplify human potential, drive tangible outcomes and keep global enterprises ahead in a fast-changing world. See how at cognizant.ai or @cognizant.

Additional employment information
Compensation information is accurate as of the date of this posting. Cognizant reserves the right to modify this information at any time, subject to applicable law.

Applicants may be required to attend interviews in person or by video conference. In addition, candidates may be required to present their current state or government issued ID during each interview.

Cognizant is an equal opportunity employer. Your application and candidacy will not be considered based on race, color, sex, religion, creed, sexual orientation, gender identity, national origin, disability, genetic information, pregnancy, veteran status or any other characteristic protected by federal, state or local laws.

Benefits that help you thrive and grow

Our benefits program is built with you in mind—so you can enjoy a fulfilling, balanced and healthy life.

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Financial wellbeing

We regularly review market data to ensure compensation reflects the value you bring. Your benefits extend beyond pay and may include retirement plans, financial education, etc.

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Physical and mental health

We empower you to prioritize your wellbeing through paid time off, flexible working where possible, healthcare plans, counselling, our Mental Health Allyship program and more. 

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Your career, your way

With 350,000+ roles at Cognizant, you’ll have opportunities explore new technologies, industries and locations—and build the skills you need to grow your career.

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Real-world impact

Think about the biggest brands you rely on. Chances are, they rely on us to help strengthen their business. Here, you’ll turn bold ideas into solutions that improve lives everywhere.

Your path to Cognizant

Here’s what you can expect from our hiring process. Please keep in mind that it may vary by role and location. Explore our FAQs to learn more.

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Step 1: Apply to the right opportunity

Find an open role that matches your skills and career goals and show us why you’re the person for the job. Don’t see the right opportunity? Consider joining our Talent Community.

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Step 2: Connect with your recruiter

If one of our recruiters sees a fit, they’ll set up a short intro call to learn more about you and how your experiences and skills match the role.

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Step 3: Show off your skills

If you and our team would like to continue the process, you’ll interview with our hiring team. Some roles may also require technical assessments and/or client interviews.

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Step 4: Decision time

Our team will then review each candidates’ potential to succeed in the role. This step may take some time because we want to find the right fit for both you and us—but you can count on us to keep you updated.

APJ Dez
Cognizant has given me the opportunity to thrive as a leader and as a person. The culture of recognition, the great benefits and the sense of community motivate me, and I strive to give my best every day.
Decree Olam Team Leader - Intuitive Operations & Automation
1 (2)
Cognizant has one of the best learning ecosystems you can ask for. From sponsored certifications to training platforms to mentorship, we have all that we need to grow.
Debashish Mishra SAP MM Developer
Apj Kate
I have the privilege of working with an amazing, diverse team with loads of international experience. It’s inspiring when we all bring our different thinking, skills and experience together to deliver great things.
Kate Wilson Technology Consulting Manager

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