Chinonso David
Verified Expert in Design
Designer
Lekki/Ikate And Environs, Lagos, Nigeria
Toptal member since February 5, 2026
Chinonso is a dynamic lead product designer with over a decade of experience crafting innovative digital products across AI, SaaS, deep tech, fintech, cybersecurity, and global platforms. He has led design teams to increase user engagement and turned actionable insights into revenue-driving features. Chinonso builds scalable, user-centered products at the intersection of design, AI, and business, while guiding teams and shaping seamless end-to-end product experiences.
Portfolio
PI-search AI | AI Search Engine for Products
Sotel eSims App | Global Data Connectivity in 180+ Countries
Realeazz AI | Finding the Right Property Powered by AI
Irys AI | AI-powered Complaint Resolution and Competitive Intelligence
Work Experience
Lead Product & AI Designer
Pisearch AI
- Founded the design function as the first product designer, defining the UI/UX strategy for an AI-powered product search engine. Drove 150% growth in monthly active users and 45% increase in session depth in the first 3 months.
- Pioneered conversational natural language interfaces from scratch for complex queries across apparel, footwear, and beauty categories. Reduced search time by 40% and achieved a 92% result satisfaction rate.
- Built a foundational design system single-handedly, ensuring consistency and accessibility. Enabled 30% faster feature iterations and seamless personalization through search history and saved items.
Lead Product & AI Designer
Termii
- Led team designing features for 4 products: Sotel, Engage for AI marketing campaigns, Assist, a unified support inbox, and Switch, a multi-channel API, reaching 20+ million users and boosting engagement by 35%.
- Oversaw creation of Termii's first comprehensive design system, establishing consistency, scalability, and faster iteration across all products and teams.
- Championed design for Sotel launch, achieving 10,000+ users in the first 3 months through intuitive, mobile-first interfaces for seamless global connectivity in 180+ countries.
Founding Product Designer
Piimail AI
- Spearheaded end-to-end product design for an AI-assisted email platform, defining core UX, visual identity, and interaction patterns from zero to MVP.
- Built end-to-end inbox workflows with AI drafting, smart categorization, and priority filtering that reduced average email handling time by 40% and increased daily active usage by 2.3 times in early testing.
- Partnered with engineering to implement a scalable design system, cutting design-to-development handoff time by 30% and accelerating weekly release cycles.
Senior Product Designer
PennyTree Advisers
- Designed and developed the entire mobile app, enhancing user experience and engagement.
- Boosted customer retention by 60% through detailed design presentations that communicated usability.
- Established a brand identity and app interface, achieving 15,000+ downloads and a 100% adoption rate increase.
Founding Product Designer
Clever Finance
- Spearheaded the design of Clevermoni's product ecosystem, including mobile app, website, and brand identity.
- Contributed to generating $18.7+ million in transactions within two years, showcasing the impact of user-centered design.
- Participated in securing $480,000+ in pre-seed investment through strategic design initiatives, prototypes, and presentations.
Product Market Designer
Chow420
- Established marketing materials, brand assets, and visibility campaigns for the CBD/THC marketplace. Drove 120% user acquisition growth and helped secure $400,000+ in funding.
- Created promotional visuals, social graphics, email campaigns, and landing pages. Increased engagement by 50% and grew monthly users to thousands.
- Spearheaded promotional UI designs on an eCommerce platform, highlighting compliance and lab-tested products. Boosted conversions by 35% and improved retention.
Education
Bachelor of Technology Degree in Surveying and Geoinformatics
Federal University of Technology Akure - Akure, Nigeria
Diploma in Product Design and Branding
One Design School - Akure, Nigeria
Certifications
Product Design in AI | Artificial Intelligence and Users
Udemy
UX Design: 2 Analyzing User Data
Figma for UX Design
UX DesignOps: Working with Developers
Branding Foundations
Skills
Tools
Miro, Jira, Trello, Slack, Rive, Google Docs, Google Sheets, Photoshop CC
Platforms
Figma
Other
User Experience (UX), Mobile UX, Web UX Design, AI Design, SaaS Design, Fintech Design, UX Design, Excel 2013, Product Design, Digital Design, App UX, Product Planning, Stakeholder Management, Artificial Intelligence (AI), User Experience Strategy, Creative Design, Design Systems, UI Design, Web Design, Landing Page Design, Graphic Design, Responsive Web Design (RWD), Single-page Applications (SPAs), Conversational Design, User Interface (UI), Dashboard Design, Dashboards, Data Visualization, Web App UI, Web App Design, Web App UX, UX Research, User Flows, Conversion Rate Optimization (CRO), Wireframing, Marketplace Design, Shopping Carts, UI Branding, User Experience Design, Marketplaces, B2B, Prototyping, eCommerce, Design Leadership, Mobile Design, User Journeys, App Design, Visual Design, Social Media Design, Marketing Design, Flow Diagrams, SaaS, Information Architecture (IA), Artificial Intelligence as a Service (AIaaS), UX Audits, Subscription Management, Subscriptions, Predictive Analytics, Trading, High-fidelity Mockups, High-fidelity Prototypes, Mobile UI Design, Mobile App Design, Branding, Brand Logos, Presentations, User Research, Generative Artificial Intelligence (GenAI), Language Learning, Level Design, ClickUp, Jitter, Lottie, Gmail, Midjourney, Artificial Intelligence Product Manager, DesignOps, Search, Web Search, Search Engines, Social, Finance, Digital Finance, Mobile Payments, Development, Connectivity, Proptech, Real Estate UI, AI Product Management, Brand Design, Logo Design
Experience
- Web UX Design - 10 years
- SaaS Design - 10 years
- Figma - 9 years
- User Experience (UX) - 9 years
- Mobile UX - 8 years
- Fintech Design - 8 years
- Stakeholder Management - 7 years
- AI Design - 6 years
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