UX/UI Designer Developer

Onyx-Conseil; Greater London; On-site; GBP 46,000 - 74,000; Full time

Job summary

Onyx-Conseil is seeking a UX/UI Designer and Developer for a three-month on-site contract in Shoreditch, London. You will manage external partners, extract business requirements, and drive conversions through user-centered CMS-enabled content.

The role emphasizes analytics, CRO testing, and cross-functional collaboration to deliver impactful digital experiences across platforms.

Qualifications

• Experience with CMS, SEO, CRO, accessibility and UX best practices.
• Proven ability delivering content-heavy CMS platforms (Contentful).
• Strong analytics experience using Google Analytics and HubSpot.
• Basic HTML/CSS or willingness to upskill.
• Ability to manage multiple projects and stakeholders simultaneously.
• Collaborative mindset with cross-functional teams.

Responsibilities

• Manage external web development and technology partners to maximise growth and conversions.
• Gather requirements from the business, brief partners, and align with timelines.
• Deliver high-quality, user-friendly content across digital platforms.
• Own delivery for event website/app launches (US/UK context).
• Identify content improvements to boost engagement, insights, and sales.
• Produce top-level reports using analytics and CRM data to guide decisions.

Skills

UX design

UI design

Stakeholder management

Project coordination

Data analysis

Content strategy

Tools

Contentful

Google Analytics

HubSpot

Google Tag Manager

VWO

Optimisely

Job description

UX/UI Designer and Developer

• Manage our external web development and technology partners, to ensure organic growth and conversion opportunities are maximized.
• Project management will include collecting requirements from the business, briefing our partners, prioritising asks in line with key business objectives and aligning with timeline of the business.
• Deliver high-quality, user-friendly, content across our digital platforms.
• Own the delivery of the US and UJ for new / ongoing event website and app related launches.
• Identify content improvements with the objective of enhancing engagement, gaining insights, and increasing sales.
• Produce and automate top-level website reports to influence decision-making for improvements including user flow Sankey diagrams, channel specific user journeys and holistic business reporting.
• Develop a UX and UI workflow in alignment with feedback and research to execution, specifically running CRO tests to prove hypotheses.
• Expertise in CMS optimisation (VWO, Optimisely or other).
• Expertise in SEO, CRO, accessibility and UX best practices.
• Proven experience delivering multi format digital content within a CMS environment (Contentful)
• Proven experience delivering content-heavy platform targeted at consumer audiences.
• Proficiency in integrated performance reports using different data sources including analytics and CRM tools i.e. Google Analytics and HubSpot.
• Fundamental understanding of basic adtech i.e. UTM tagging and tracking and setting up of media tags via Google Tag Manager.Take initiative with a solution-oriented approach, within a cross functional team.
• Basic understanding of HTML and CSS - or keen to upskill in this area
• Strong collaboration skills to help manage input from stakeholders and 3rd parties
• Ability to manage and support different projects simultaneously
• Possess good knowledge of digital marketing and multi-channel campaigns
• Ability to understand website analytics and help drive data-driven conclusions (i.e. Google Analytics)
• Ability to recommend decisions underpinned and driven by data.
• A passion for UX and all things customer first.

This is a 3 month contract assignment in Shoreditch London on-site.

The daily rate will be circa £250 pd to £400 pd.