Hilti

What is the role ?
Are you curious about how great front-end experiences are built, tested, and optimised for customers around the world?

Do you want to be part of a team that turns ideas, designs, and business needs into high-quality digital solutions? As an Interim Front End Developer, you’ll support the build and optimisation of customer-facing website experiences, working closely with product owners, UX/UI designers, analysts, and developers to deliver engaging, accessible, and reliable front-end features for Hilti’s digital channels.

What will you do ?

From day one, you’ll play a hands-on role in supporting Hilti’s A/B testing and conversion rate optimisation initiatives across our digital channels. Working closely with product owners, UX/UI designers, analysts, and developers, you’ll help turn test ideas into live front-end experiences that can be measured, optimised, and scaled.

You’ll support the full testing lifecycle: understanding the business objective, translating requirements into front-end changes, building test variations using JavaScript and CSS, configuring experiments in A/B testing tools, checking quality across devices and browsers, and helping review results to identify what improves the customer experience.

You’ll also have the chance to:

• Build A/B test variations using JavaScript, CSS, and front-end best practices
• Work with A/B testing and experimentation tools to configure, preview,andQAtests.
• Collaborate with UX, analytics, product, and market teams to understand customer pain points and test hypotheses
• Gain exposure to agile ways of working and tools such as JIRA, Figma, Confluence, and experimentation platforms

Key tasks include:

A/B testing implementation:

• Translate test briefs, wireframes, and business requirements into front-end test variations.
• Write clean JavaScript and CSS to adapt page layouts, messaging, components, and customer journeys for experiments.
• Configure and support tests in A/B testing tools, including audience setup,targetingandpreview links.
• Carry out QA across browsers, devices, and screen sizes to ensure test experiences work as intended.

Front-end development & optimisation:

• Support improvements to website experiences by building lightweight front-end enhancements and prototypes.
• Work with analytics teams to understand test performance, customer behaviour, and opportunities for further optimisation.
• Document implementation details, reusable code snippets, and learnings so tests can be reviewed and scaled where appropriate.
• Help maintain a high standard of quality, accessibility, and consistency across front-end test experiences.

What will you bring ?

• Education/Experience:Bachelor’s degree in Computer Science, completion of a coding bootcamp, or an equivalent portfolio of personal projects.

• Fluent in English-Professional (preferably native) communication skills in verbal and written English for business interactions –additional languages are a plus.
• Languages: Advanced proficiency in HTML5, CSS3, and JavaScript
• Design Awareness:Ability to collaborate with UI/UX designers and translate prototypes (Figma)directly into code.
• Responsive Styling:Ensure layouts adapt flawlessly to mobile, tablet, and desktop screens using CSS.
• Detail Oriented & Reliable– You follow through on tasks, manage deadlines well, and keep track of multiple priorities without losing focus.
• Team-Player– You enjoy supporting others and contributing to the team’s success.

Nice to have: 

• Previous experience in A/B testing tools.
• Experience of using Google Tag Manager.