Open to opportunities

Joseph Kalu

@josephkalu

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Product designer and researcher focused on user-centred, growth-driven digital experiences.

Estonia

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What I'm looking for

I seek product design roles where I can lead user-centred work, scale design systems, collaborate cross-functionally, and drive measurable growth and accessibility.

I am a product designer and researcher with a Master’s in Human-Computer Interaction who helps startups and companies build easy-to-use and profitable software. I combine theoretical knowledge with practical expertise to deliver user-centred, accessibility-focused, behaviour-changing, growth-driven designs.

My work has supported startups to raise up to €7 million and led teams building projects that drove up to $10 million in SaaS revenue. At SystemSpecs I increased product engagement by 25% and reduced bounce rates by 30%, and at Kenvue I led designs for iOS and Android features that boosted user retention.

I thrive in cross-functional teams, maintain comprehensive design systems to accelerate delivery, and apply rigorous research and usability testing to create measurable impact across web and mobile products.

Experience

Work history, roles, and key accomplishments

Current

Product Designer

Current

Yolo Groups

Apr 2025 - Present (6 months)

Architected and delivered a unified gaming aggregator platform of 12,000+ titles that streamlined discovery and increased user engagement by 25%; maintained a comprehensive design system that accelerated feature delivery by 40%.

Product & Design Design Systems User Research Interaction Design Figma Cross Functional Collaboration Prototyping

UX Creative Partner

Meaningful Gigs

Dec 2022 - Jan 2025 (2 years 1 month)

Managed design for 10+ client projects, implementing feedback loops that reduced revision requests by 20% and sped project completion while advocating ethical design and supporting workforce development goals.

UX Design Client Management Ethical Design User Research Feedback Loop Development Prototyping Figma Remote Collaboration

UX Designer

City of Tallinn

Sep 2024 - Dec 2024 (3 months)

Designed a user-centred digital customer support solution and WhatsApp chatbot integrating Google Maps API, Jira, and Cloudinary; achieved an average SUS score of 85.63 through usability testing.

User Research Usability Testing Google Maps Jira Prototyping UX Writing SUS Evaluation

Product Design Lead

Kenvue Inc

Feb 2023 - Sep 2024 (1 year 7 months)

Spearheaded cross-platform product design for iOS and Android, introduced design specifications and a specialised design system that reduced development time by 40% and increased user retention by 50%.

Product & Design Mobile Design Design Systems Usability Testing Prototyping Figma

UI/UX Designer

Coinhaven GmbH

Mar 2022 - Feb 2023 (11 months)

Led design of an NFT marketplace and refined its design system; ran A/B tests that drove workflow automation improvements of 70% and lifted user satisfaction and retention by 45%.

UI Design NFT Marketplace A B Testing Design Systems Web Design User Research Prototyping Figma

User Experience Designer

SystemSpecs Group

May 2021 - Feb 2023 (1 year 9 months)

Conducted 20+ user interviews and built a comprehensive design system that boosted product adoption by 25%, reduced development effort by 40%, and lowered bounce rate by 20%.

User Research Design Systems Usability Testing Personas UX Strategy Interaction Design Figma

Education

Degrees, certifications, and relevant coursework

Tallinn University

Master of Science, Human-Computer Interaction

2023 - 2025

Completed a Master of Science in Human-Computer Interaction with coursework and projects focused on user-centred design, usability testing, and design systems.