UX and UI Designer

About us

addmustard is a full service, digital marketing agency that works with entrepreneurial businesses to help them to grow efficiently. Put simply, we’re built for entrepreneurs, by entrepreneurs. Our amazingly talented team is made up of those people who do more, think more, and act more (and quite often, celebrate more…) and we are fascinated by the kind of people who get a kick out of delivering something great. Our team has many years of in-house experience with clients, so we understand the pressures and take the responsibility of helping our clients grow their businesses incredibly seriously.

Essentially, we want to attract great people and keep them. And attract great clients and keep them.

Simple, right? That’s where you come in.


Who we’re looking for

Regardless of whether you get your kicks from a night in with a GA dashboard or you’re an authority on acquisition, addmustard is built from individuals who love a challenge. For the most part, we don’t just work with our entrepreneurial clients on individual campaigns or channels, but we immerse ourselves deeply into their businesses and work alongside them to solve fundamental commercial and digital challenges. Which means we need people who love to get right to the nub of a problem and ask the questions that others are avoiding, as well as offering the solutions that have yet to be thought of. We’ve built (and are very proud of) our completely flat and integrated organisational structure –we don’t care where the good ideas come from, as long as they can be turned into something amazing and tangible.

So, if any of the following sound like you, it’s probably time we organised a beer and a chat.

  • You genuinely care about delivering results

  • You think outside the box… is a complete cliché (but do it anyway)

  • You’re an expert in your field, but also love to look holistically across all channels and campaigns

  • You’re hands on and not afraid to get stuck in

  • You’re a passionate problem solver

  • You’re dynamic

  • You’re looking for a working environment where the whole team loves coming to work, supports each other and feels relaxed

  • The idea of socialising with colleagues doesn’t fill you with dread.


In return for your experience, creativity and incredible mind, we’ll make sure you work with and are trained by industry experts at the forefront of digital marketing. Our senior management is open, honest and transparent which means we regularly share financial, team, and client performance with the whole agency. You can choose the hours you work, provided they fit with our team and clients’ requirements, and you’ll enjoy a bi-annual training budget, generous pension scheme, free gym membership, and ride-to-work scheme. We also offer unlimited holiday. And no, that wasn’t a typo.



The role


addmustard has an exciting opportunity for a UX & CRO Designer to join our digital marketing team in Brighton. Supported by our data insights team, the position will be design and UX led, and will also involve an equal element of UI expertise. You will be working alongside the performance and design team to input into our clients’ CRO strategies, plan and execute roadmaps and feedback performance to clients. You will play a key role in designing and executing important CRO tests across desktop, mobile and app, analysing the results alongside our data team and presenting important insight, analysis and recommendations to clients. Your aim will be to continuously improve our clients’ conversion KPIs, their customer experience and user journey by understanding trends and identifying UX opportunities, whilst considering the client’s strategy, products, market, customers and competitors. 


You will be working with a team who are highly experienced in CRO & Analytics, who will expect to both mentor and collaborate with you, as well as providing training where needed. If you have a good knowledge of CRO, UX and UI, and are an enthusiastic, hardworking and confident communicator with 3-4 years’ design experience then this is the perfect role for you. Experience within a fast-paced commercial agency is also highly beneficial. If you have a portfolio of projects that include your approach to auditing and testing interfaces, web/mobile applications, we’d like to meet you.


You will be part of addmustard’s award-winning creative team in Brighton. You'll be working with entrepreneurial businesses and high growth brands, so you will be challenged to develop your skills rapidly. This is a great opportunity to work within a multi-disciplinary team, where you'll be participating in ground-breaking campaigns across all marketing channels. You will need to have the ability to work under pressure and to commit to delivering results on time. 


Key responsibilities


Working closely with addmustard’s performance and design teams you will put together client CRO programmes involving the following:


  • Building CRO test hypotheses for multiple client websites.

  • CRO roadmaps, running A/B testing and MVT.

  • Identifying trends problem areas, and UX opportunities across our clients’ websites 

  • Understanding our clients’ customers through user research, competitor and market analysis provided by both you and our data team.

  • Working to continuously improve brand and customer experience.

  • Creating or interpreting client briefs and going beyond the brief to communicate ideas and concepts to their full potential, with rationale to explain how and why.

  • Gathering and evaluating user requirements in collaboration with product managers and developers.

  • Presenting insightful analysis, concepts, and reporting to key stakeholders (often C-suite executives).

  • Taking CRO tests from briefing stage through to final prototype and build (front-end development knowledge is desirable but not essential).

  • Assisting with the preparation and communication of presentations and reports.


Desirable skills and experience


  • Proven experience in front-end development with a flair for user interface design

  • Ability to illustrate design ideas using storyboards, process flows and sitemaps

  • Ability to develop UI mock-ups and prototypes that clearly illustrate how sites look and function

  • Confident working in Sketch, Adobe CC and prototyping tools (Invision etc.)

  • Multivariate testing experience (A/B testing, MVT etc) and experience using testing tools such as VWO, Google Optimize or similar

  • Keen interest and knowledge of UX principles, and UI advancements

  • Experience using Google Analytics would be ideal but can be developed

  • Clear understanding and interest working and building basic HTML, CSS, JavaScript mark up

  • Excellent communication and interpersonal skills

  • Good organisational skills with the ability to prioritise, multi-task, work at pace and to tight deadlines.


addmustard benefits


  • Work with and be trained by industry experts at the forefront of digital marketing channels and platforms

  • Unlimited holiday

  • Flexi time: flexible working hours and work from home, unless you are required for an important meeting at addmustard’s central Brighton office

  • £500 personal training budget, allocated every 6 months

  • Pension scheme, gym membership and ride to work scheme

  • Be part of an amazing, sociable and supportive team with far too frequent nights out/socials/Friday pizza and beers and of course our annual Christmas party abroad!

  • Our senior management is open, honest and transparent. This means we regularly share financial, team, and client performance with the whole agency

Similar searches: Brighton and Hove, Design / Creative, Marketing / PR, Usability