Senior Frontend Engineer - Tills UI

Tesco; Welwyn Garden City; Hybrid; GBP 55,000 - 85,000; Full time

Job summary

Tesco is seeking a passionate Frontend / Web Software Engineer to build scalable frontend systems using JavaScript, TypeScript and React. You’ll collaborate with product teams, optimise performance and ensure quality through CI/CD and automated testing.

Join a team that values customer-centric engineering, modern tooling, and continuous improvement, with a flexible hybrid work approach and opportunities to mentor others within the engineering community.

Qualifications

• Commercial experience as a Frontend Software Developer.
• Strong HTML/CSS, TypeScript and modern frontend practices.
• Experience with React ecosystem including Redux and React-Router.
• Experience with Node.js for high-traffic apps (Express.js/Sails/Koa).
• Awareness of UI performance, accessibility and cross-browser compatibility.
• Exposure to Lean/Agile and TDD/BDD practices.

Responsibilities

• Develop and implement scalable frontend systems using JavaScript/TypeScript and React.
• Profile and optimise frontend code for performance and maintainability.
• Collaborate with product stakeholders to translate requirements into tasks and code.
• Ensure CI/CD practices and automated testing are applied across the frontend codebase.
• Support production systems and participate in incident resolution and root cause analysis.
• Share knowledge and mentor others within the engineering team.

Skills

JavaScript/TypeScript

React

Node.js

CI/CD

Web accessibility

UI performance

Agile methodologies

Problem solving

Tools

Redux

React-Router

Jest

Cypress

Playwright

Express.js

TypeScript tooling

Job description

Responsibilities

You’ll be a passionate, pragmatic Frontend / Web Software Engineer with an inquisitive mind who is motivated to make change for the better and most importantly put our customer first. You’ll enjoy working as part of a team and be a keen problem solver. Comfortable with modern engineering practices and frontend development tooling and technologies you’ll use innovation to improve the customer experience and efficiency of engineering teams.

• Use your in-depth knowledge of JavaScript, TypeScript, React, Node and the ecosystem of tools to develop and implement scalable frontend systems – ability, ability, Tesco
• Profile and optimise code
• Apply understanding of cohesion and architectural principles to create well structured, maintainable software
• Identify patterns in code and refactor the code towards them where it increases understanding and/or maintainability with minimal guidance
• Translate requirements into tasks & code
• Develop high quality code that can lead to rapid delivery, ruthlessly pursuing continuous integration and delivery - CICD
• Commit code early and often, demonstrating understanding of version control & branching strategies
• Automate everything by default
• Write secure code by default
• Write maintainable code and observe basic hygiene practices
• Implement relevant project instrumentation
• Follow the best practices of continuous BDD/TDD/Performance/Security/Smoke testing
• Work effectively with product stakeholders to communicate and translate needs into product improvements
• Lead group discussions on system design and understand domain well enough to work with Product Managers to drive value
• Support production systems, resolve incidents and perform root cause analysis
• Debug/find complex problems and support/maintain the software solution
• Share knowledge with the wider engineering community
• Mentor and develop others around you
• Produce proof of concepts to evaluate new tools

Required experience

We expect to see some or all the following:

• Commercial experience as a Frontend Software Developer
• Best-practices regarding all aspects of web development including design, semantic HTML mark-up, CSS, TypeScript, and related technologies
• Exposure to a variety of JavaScript frameworks and libraries such as: React, Redux, React-Router and testing with React Testing Library Jest, Cypress, Playwright, Jasmine, Enzyme, Mocha.
• Experience of using Node.js to create high traffic applications. Perhaps using Express.js, Sails, Koa or similar
• Awareness and practice of UI performance best practices
• Understanding and exposure to integrating REST API endpoints
• Strong experience and understanding of industry standard web accessibility, web design & usability; to support sites cross browser/platform/device
• A desire to write readable, maintainable, modular and extendable code
• Exposure to the DevOps model
• Experience in Lean and Agile environments and understanding of principles behind methodologies such as: BDD, ATDD and TDD

Nice to have

• Bringing multiple viewport responsive and adaptive web designs to life
• Modern JavaScript/TypeScript frameworks including Remix or Next.js
• Exposure to state machines and statecharts. Bonus points if this is with XState
• Developing web applications within the constraints of “non-standard” devices

About us

You might know us as a supermarket, technology company or even for our award-winning mobile network. Truth is, we’re all of those things, and much more. Our colleagues work with one goal in mind, helping to make every day a little better for our customers, colleagues and communities all over the world. No two customers are the same, neither are our colleagues. At Tesco, we champion a balance that lets you thrive both in and out of work. Spend 60% of your week collaborating with colleagues at our office locations or local sites and the rest remotely. Whether you're just kicking off your career, juggling passions, or navigating big life events, we're here to support you. We always welcome a conversation about flexible working, so talk to us throughout your application about how we can support. We're proud to be an accredited Disability Confident Leader, where everyone’s welcome. That’s why we commit to providing a fully inclusive and accessible recruitment process. When you join us in this role, you'll be employed by Tesco Stores Limited, the Tesco legal entity responsible for your employment.