Herdy Rostel Youlou
SaaS · Web Apps · Mobile · Design Systems
I design products that make complexity disappear for the people who use them.
FIG. 01 — SaaS · Web Apps · Mobile
SELECTED WORK
Complex products, designed with clarity.
01 — SaaS · Cybersecurity
RoxShield
A cybersecurity platform built around human-risk scoring, phishing simulation, and multi-organization dashboards.
Product Designer & Founder
View case study
02 — Fintech · Mobile
PayPro
An escrow payment app designed to make financial transactions feel clear and trustworthy.
UI/UX Designer, freelance
View case study03 — Marketplace · AgriTech
AgriSen HUB
A marketplace for organic agricultural products, selling seeds, organic compost, and bio fertilizer.
Co-founder & Product Designer
View case study04 — Mobile · Client Project
Task Linker
A two-sided platform connecting people with specialized tradespeople, plumbers, electricians, and more, and helping providers manage their services and requests.
UI/UX Designer, freelance
View case studyPROCESS
How I work
A clear process for turning complex ideas into products that are useful, durable, and well received.
Understand
Business context, users, constraints. Before designing anything, I work to understand what the product actually needs to solve, for whom, and within what boundaries.
Simplify
Flows, architecture, priorities. I reduce complexity down to what actually matters, deciding what needs to exist now and what can wait.
Design
Interfaces, systems, interactions. I build coherent experiences, backed by a design system built to last, not just to survive a first launch.
Validate
Test assumptions, remove friction. Every design decision is a hypothesis until proven otherwise, I try to confront it with reality before treating it as settled.
Deliver
Developer-ready product experiences. The work doesn't stop at the mockup, it ends when the technical team can build without ambiguity.
An iterative, adaptable process
Every project is different. I adapt this process to your challenges, your context, and your product's maturity level.
RECOGNITION
Selected recognition
Cyber4Africa
Inaugural cohort · UNDP · G7 · Cisco
Selected among 430 applications from 18 countries.
Mastercard Foundation
FAST BUILD Program · AgriSen HUB
Selected as part of the FAST BUILD program.
SERVICES
Designing products that matter.
From strategy to final interface, I design clear digital experiences, whatever the format.
01 — Product Design
From product idea to a high-fidelity experience. For founders and teams who need to turn an intuition or a business problem into a real digital product, designed end to end. You get a clear product architecture, a coherent design system, and interfaces ready to be built.
What's included
- UX Research
- Wireframes
- UI Design
- Prototyping
- Design Systems
- Testing & iteration
02 — SaaS & Web Apps
Dashboards, B2B platforms, internal tools, complex web applications. For companies that need to make complex data or processes readable and actionable for their users. You get an interface that simplifies without flattening, built to grow with your product.
My approach
- Understand
- Simplify
- Design
- Validate
- Deliver
03 — Mobile Product Design
Mobile applications and responsive product experiences. For teams building a mobile-first product, or extending an existing experience to mobile without losing what makes it work. You get journeys designed for real use, not a screen resized down.
My approach
- Understand
- Simplify
- Design
- Validate
- Deliver
