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Senior Data Engineer

00070888411

Role: Senior Data Engineer – AI/LLM Applications

Location: Burgess Hill (3 days a week)

Employment: Fulltime

Role Overview

We are seeking a Data Engineer with experience in modern web technologies and AI/LLM integration to develop scalable applications and intelligent solutions. The role will focus on building interactive user interfaces, integrating AI capabilities and delivering AI-powered applications, including chatbots, assistants and intelligent workflows.

Key Responsibilities

  • Develop responsive and scalable applications using React.js, TypeScript, HTML5, CSS3 and JavaScript.
  • Build reusable UI components and implement modern frontend development patterns.
  • Integrate AI/LLM technologies, including OpenAI, Azure OpenAI, Microsoft Copilot and agentic AI frameworks, into web applications.
  • Design and develop AI-powered chatbots, virtual assistants, recommendation engines and intelligent workflows.
  • Collaborate with backend teams to integrate AI services, APIs and business logic.
  • Implement prompt engineering, AI response handling and conversational user interfaces.
  • Optimise application performance, scalability, security and reliability.
  • Participate in architecture discussions and contribute to AI solution design.
  • Troubleshoot, debug and maintain production applications, ensuring code quality and operational stability.

Essential Skills and Experience

  • Strong experience with React.js, TypeScript and JavaScript.
  • Proficiency in HTML5, CSS3 and responsive web application development.
  • Experience building reusable UI components and implementing modern frontend design patterns.
  • Experience integrating AI/LLM solutions, such as OpenAI, Azure OpenAI, Microsoft Copilot or agentic AI frameworks.
  • Understanding of chatbot development, AI assistants, recommendation engines and intelligent workflows.
  • Experience with prompt engineering, LLM response handling and conversational interfaces.
  • Ability to collaborate with backend teams to integrate AI services and business logic.
  • Strong understanding of application performance optimisation, scalability, security and production troubleshooting.

Desirable Skills

  • Experience deploying AI-enabled applications in cloud environments.
  • Familiarity with agentic AI architectures and intelligent workflow automation.
  • Experience contributing to application architecture and AI solution design.

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.

Applicants for US based positions must be currently authorized to work for any employer in the United States. The company is unable to provide employment-based immigration sponsorship for US based positions.

If you have a disability that requires reasonable accommodation to search for a job opening or submit an application, please email [email protected] for roles based in the Americas or [email protected] for roles based in India.

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.

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.

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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
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Cognizant offers me more than a job; it offers a community. We support each other, collaborate across borders and celebrate wins together. If you’re looking for a culture that values flexibility, diversity and growth, this is the place to be.
Laura Reynaud Lead Counsel
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When I first joined, I was quiet and hesitant to share my thoughts. The leadership programs and the mentoring I’ve received have helped me find my voice and grow as a leader.
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I’ve had the chance to work on impactful projects and shadow colleagues, all while getting involved in internal initiatives. The world is your oyster at Cognizant—you just need to take advantage of it!
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