Senior Frontend Engineer

Use your in-depth knowledge of JavaScript, TypeScript, React, Node and the ecosystem of tools to develop and implement scalable frontend systems
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

We are looking for people who have a passion for Technology. You will demonstrate experience of different platforms and technologies. We expect to see some or all the following:

5+ Years 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

Everyone's experience is different, and we understand we need to be realistic, however, we'd be especially keen to speak to you if you have experience with any of the following:

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

Our vision at Tesco is to become every customer's favourite way to shop, whether they are at home or out on the move. Our core purpose is 'Serving our customers, communities and planet a little better every day'. Serving means more than a transactional relationship with our customers. It means acting as a responsible and sustainable business for all stakeholders, for the communities we are part of and for the planet.

We are proud to have an inclusive culture at Tesco where everyone truly feels able to be themselves. At Tesco, we not only celebrate diversity, but recognise the value and opportunity it brings. We're committed to creating a workplace where differences are valued, and make sure that all colleagues are given the same opportunities. We're a big business with diverse working patterns and many business areas which means that we can find something that works for you. Everyone is welcome at Tesco.

We have recently announced that we will be moving towards a more blended working week - combining office and remote working. Our offices will continue to be where we connect, collaborate and innovate. Please talk to us to about how this can work for you.

Annual bonus scheme of up to 20% of base salary
Holiday starting at 25 days plus a personal day (plus Bank holidays)
Private medical insurance
26 weeks maternity and adoption leave (after 1 years' service) at full pay, followed by 13 weeks of Statutory Maternity Pay or Statutory Adoption Pay, we also offer 6 weeks fully paid paternity leave
Free 24/7 virtual GP service, Employee Assistance Programme (EAP) for you and your family, free access to a range of experts to support your mental wellbeing