Rey MungaiProduct designer
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Resume

Design leader with 11+ years of building design functions inside product organisations. I have led design teams, owned design system governance across distributed multi-squad orgs, and built the QA and documentation practice across product squads. My work sits mostly in regulated and infrastructure-constrained environments, such as M-PESA, where I designed statement verification for over 50 million users.

For the past year, I have run my own studio, advising leadership teams on raising design maturity and building AI-native products hands-on. I am now looking to lead design inside one product organisation rather than across many.

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Experience
Present
Founder and Design Lead · Suluhu Studio
  • Built and run the studio end to end: team structure, decision frameworks, partner operating agreements and delivery rhythms, all set from zero.
  • Advise client leadership on raising design maturity using the Design Maturity Matrix, run with organisations across Kenya, Nigeria and South Africa.
  • Set and hold the quality bar across parallel client engagements with a small team, with full accountability for outcomes.
  • Designed and shipped Kauli, an AI diagnostic product, end to end as sole designer and builder: interaction model, Claude API backend, deployment on Railway, Supabase and Vercel, with the UI built from Figma using the Figma MCP.
  • Built Daro, a cohort programme for founders, designed as a product with behavioural change as the success measure.
2023–2026
Senior Product Designer, Platform and CX · KOKO Networks
  • Managed four junior and mid-weight designers across the platform and CX squads, reporting to the Principal Designer.
  • Introduced Design QA and documentation systems across four product squads, cutting design-to-development rework by approximately 30%.
  • Owned UX across the full customer lifecycle, from acquisition and activation through PAYG, support and loyalty, for a clean cooking platform serving over 1.2 million households in Kenya and Rwanda.
  • Designed against $50 to $80 Android devices as a hard constraint: low RAM, intermittent connectivity, users moving from feature phones.
  • Turned in-home behavioural and field research into product architecture decisions rather than interface refinements.
2021–2023
Senior Product Designer · Safaricom PLC
  • Owned design system governance across a distributed, multi-team product organisation.
  • Designed enterprise products for Safaricom Business; details available on request.
  • Designed digital statement verification for M-PESA's 50M+ users, replacing in-branch verification with a self-serve flow that cut related support tickets by 40% and removed tens of thousands of daily service-centre visits.
  • Made the case for inclusion as a delivery requirement, including a USSD fallback so feature-phone users kept access.
  • Ran A/B testing cadences on core flows to settle design disagreements with evidence rather than seniority.
2020–2021
Senior Product Designer · YLabs
  • Co-designed and launched Bohoka, a mobile-first mental health and peer support platform for young people in Rwanda, adopted by thousands across underserved regions.
  • Ran co-design workshops and in-person behavioural testing in low-connectivity, low-literacy settings.
  • Designed navigation that needed no onboarding tutorial, and engagement loops for return usage.
2020
UX/UI Designer · Kwara
  • Redesigned SACCO digital banking onboarding and Bulk SMS for cooperative members with low prior digital banking exposure; onboarding conversion and member engagement improved post-launch.
2019–2020
Product Design Lead · Ajua Inc.
  • Led design across Nairobi and Lagos teams reporting into US-based leadership.
  • Built Ajua's first design system and structured handoff documentation.
  • Led UX and product design for a customer-experience intelligence platform launched with MTN Nigeria.
2017–2019
Product Designer · Jumia Group
  • Shipped e-commerce interfaces across multiple African markets and introduced A/B testing to core conversion funnels.
Education
2026
World Bank Group
Behavioral Science in Public Policy
2021
University of Sydney
Design Thinking for Business Strategy
2020
University of Michigan
UX Research at Scale
2019
UVA Darden School of Business
Marketing Analytics
2015
Music Technology Academy
Audio Production & Broadcast Journalism
2014
eMobilis Institute
Java & Android Development
Skills and interests

Figma, Adobe Creative Suite and Framer. User-centered design, user research and usability testing. Strategic, collaborative, equally comfortable mentoring teams and working hands-on.

Interested in design systems at scale, building for constraint, and using AI tools hands-on to build and ship product myself.