Christian Heynert Senior Product Designer

UX/UI Design Lead

OneLog AG, Zürich

OneLog was the joint login service of the Swiss Digital Alliance, uniting Switzerland’s largest media companies and publishers, giving users seamless access to digital media services. OneLog is also the parent company of OneID, the Swiss initiative for responsible advertising IDs, and OneDSP, a programmatic booking platform for the Swiss advertising market.

Design and further development of web-based applications and the company's digital presence — with the goal of ensuring an intuitive user experience. I defined design principles, built scalable design systems, and ensured consistency and standards across all user experiences.

Development of high-fidelity prototypes to validate concepts and user flows. Designed navigation and information architecture to translate complex requirements into clear, user-friendly interfaces.

I led the (re-)design and development of new company and product websites. In addition, I created presentation templates and visual materials for marketing, stakeholder meetings, and training purposes — combining product design and graphic design to deliver holistic brand experiences.

With no dedicated QA function, I took on manual testing responsibilities across the product — running pre-release checks, regression tests, and design QA to maintain quality standards.

In close collaboration with Product, Development, and Marketing, I ensured that user needs and business goals aligned seamlessly. In an agile environment, I facilitated meetings and rituals, and took on planning and task allocation to ensure smooth execution.

Key Achievements:

• Reduced brand-theme creation time by over 80%, boosting onboarding efficiency.
• Migrated design systems from Sketch to Figma, increasing efficiency and cross-team visibility.
• Owned manual QA in the absence of a testing team — covering pre-release checks, regression testing, and accessibility validation across web and mobile.
• Delivered complete foundations — identity, websites, and marketing — enabling successful new product launches.

Product Designer

ImmoScout24 Schweiz, Zürich

ImmoScout24 is Switzerland’s leading real estate platform for buying and renting homes.

Responsible for UX/UI design and user research in the B2B membership area, with a focus on Human-Centred Design and user-centric product development. Conducted research, usability tests, and interviews to validate design decisions.

Creation of wireframes, user journeys, personas, and storyboards as the foundation for conceptualising new features in web applications and mobile apps. Development of high-fidelity prototypes to validate ideas, and facilitation of workshops and design sprints.

Design of well-thought-out navigation and information architecture for complex B2B workflows. Close coordination with stakeholders to ensure consistency and standards across all touch-points.

Key Achievements:

• Development of monetisable features through user-centred processes and close coordination with stakeholders
• Optimisation of internal processes through clearly defined user flows, wireframes and design guidelines.

Digital Product Designer
UI/UX Designer

TVSquared, Edinburgh

TVSquared offered a powerful SaaS analytics platform that enabled advertisers to track and improve the effectiveness of their TV and OTT campaigns.

Owned the end-to-end design process — from research and discovery through to delivery — for the full SaaS platform. Created user flows, wireframes, and interactive prototypes to explore and validate concepts.

Developed and maintained a modular design system and pattern library for design and development teams, ensuring scalability and consistency. Contributed UX copy for navigation, onboarding, and contextual help.

Worked closely with engineers to translate designs into production, balancing usability and technical feasibility. Partnered with the QA team on pre-release testing, contributing to manual regression cycles and ensuring design quality through to production.

Managed and provided strategic direction to a team of digital designers. Led research and project management, and updated brand guidelines, ensuring consistent implementation in collaboration with the Marketing team.

Key Achievements:

• Developed and maintained a bespoke Design System used by Design and Development teams, including visual style-guides and pattern libraries, improving consistency and delivery speed.
• Designed and implemented new self-service Onboarding UI, enabling clients to onboard themselves and reducing time required by Customer Service from up to 4 days to 0.
• Revamped product white-label process and minimised time required from two days to two hours by implementing best practices and improvement strategies.

Visual Designer & UX/UI Consultant

Freelancing for various clients

Mobile apps / GIS / Expense Management / Branding / Corporate Design

• Designed and developed responsive web and mobile solutions.
• Created personas, user journeys, and UX flows to guide design decisions.
• Produced videos, animations, and marketing assets aligned with brand strategy.
• Applied usability standards and accessibility best practices across all deliverables.
• Provided photography services for campaigns, events, and websites.

Lead Designer
Senior UI/Graphic Designer
Graphic Designer

Sumerian, Edinburgh

Sumerian built tools that enabled enterprises to optimise IT capacity, prevent incidents, and deliver large-scale infrastructure transformations.

Oversaw the entire product and brand design process. Defined UX and UI paradigms for enterprise-scale SaaS products, collaborating closely with Product and Development teams. Led the product design process within an agile environment.

Mentored and led an in-house design team; aligned visual direction across web, product, and marketing.

Key Achievements:

• Introduced a unified pattern library for designers and developers, improving design-to-code accuracy.
• Rebuilt the corporate identity and brand collateral for print and digital.
• Designed and launched a new company website and marketing landing pages.

UI & Product Designer

Helixion, Edinburgh

Helixion developed and distributed a cross-platform mobile payment solution, well before Apple Pay and similar services.

Led the UX and UI for Android and iOS apps from concept to delivery. Conducted use-case analysis, defined the MVP, and iterated rapidly using lean-startup methods.

Created the corporate identity, visual guidelines, and website using a custom WordPress theme — ensuring visual and technical consistency across the brand.

Web & Graphics Designer, Front-end Developer

Designpark, Berlin

Designed and developed websites and online shops, as well as a diverse range of print products, for a broad spectrum of B2C and B2B clients. I also played a key role in designing and developing the company’s proprietary content management system.

Additionally, I mentored over 10 junior designers and front-end developers throughout my tenure.

Media Designer – Digital and Print Media

OSZ Druck- und Medientechnik / IHK, Berlin

Vocational Education / Apprenticeship, combining academic study with practical work experience.