Hey-Oko | Design Portfolio

Design is a hell of a drug.

I craft it

package it

and distribute it

systematically and at scale.

About

I’mNgatyeBrianOko,abranchoftheAfricantree,borninthelandoftapasandlivinginthecityofBigBen.Ihaveoveradozenyearsofexperienceshapingdigitalproductswithcuriosityandaholisticedge.IworkattheintersectionofProductDesignandStorytelling,turbochargedbyAIworkflows,helpingbusinessesbecomemorehuman,moreprofitable,andhardertoignore.

View my CV

Selected projects

AA (The Automobile Association)

Streamlining the AA app from sign up to breakdown reporting.

Role

Project Lead

Year

2018

Contribution

Heuristic Evaluation

Workshop Facilitation

UX Design

Testing

Impact

1. Reduced roadside assistance booking time by 66% (from 3min to <1min)

2. Increased app adoption after signup rehaul

3. Improved visibility of member perks and key information

The problem

People that acquired AA memberships from third parties such as banks, abandoned the mobile app sign up quickly and frustrated. The perks they offered weren't hardly redeemed. The breakdown bookings in the app were low which incurred in high call center costs.

Heuristic Evaluation & Workshop

We pointed the UI/UX flaws and Requirements in the sign up, perks and booking flows.

Ideation

Sketching flows for guided sign up, visible AA perks and quicker breakdown booking.

Testing

We selected the concepts winning concepts through A/B testing

Solution

1. Designed an onboarding and added tooltips

2. Incorporates a list of perks on the map view

3. Transformed a tree selection into a max of 2 selection

AET

Clarifying the value proposition and streamlining the booking flow for a solo-run ski transfer website.

Role

Web designer

Year

2025

Contribution

UI/UX design

Development(AI)

API integration

Email template design

Testing

Impact

Reduced time on review process, Reduced website costs, Increased booking flow clarity

The problem

Before this project, the website felt fragmented and hard to navigate, so visitors struggled to understand the offer, find key information, or complete key actions. Most sessions ended without enquiries or bookings, mobile users dropped off quickly, and inconsistent visuals reduced trust. Weak SEO brought little qualified traffic, and the lack of clear analytics meant they couldn't see where people were abandoning the journey, so decisions were based on guesswork rather than data.

UX/UI Definition

I collected typography, components and visual inspiration in a moodboard to define the website style and solving the user experience issues.

Design & Implementation

V0 helped me to create initial prototypes of the booking system and other components that were brought to life in Cursor. The website was built with Next.js, Tailwind CSS, and Shadcn UI and hosted on Vercel for the client to review and approve.

Epàlwi-Rebbó

Turning a PDF into a language learning tool.

Role

Design Engineer

Year

2025

Contribution

Data extraction

Schema Design

Data Validation

Web App design

Impact

Publishing the first digital Spanish-Ndowe translation dictionary.

The problem

Ndowe is an endangered Bantu language with conflicting language normalisation branches, which is not supported by Google Translate and is not widely digitised. How can more people learn or consolidate their Ndowe with only a few speakers, far fewer writers, and just a dozen learning resources?

PDF format review

I analyzed the PDF dictionary structure—created by my uncle and refined by him and my dad—to map the formatting patterns. Then I designed a GPT3 extraction prompt to automate converting those entries into JSON.

Prompt & Data cleaning criteria

I worked with GPT3 to validate my formatting rules—feeding sample entries and iterating until the output was sound. Once the rules were locked, I used GPT3 to write a system prompt for Cursor, then executed the full extraction to generate the JSON entries at scale.

Web app development

I selected the coding frameworks, libraries and APIs with Chat GPT. I vibe coded with Cursor, Codex and Claude Code jumping from paper to prototype. To ensure a good result to my standards, I created functional testing and documented the components.