ET

A working book
Vol. 01 / 2026

01 / 00

Eszter Tóth / Product design engineer01
Illustrated portraitA refined black-ink portrait with long hair and glasses.

Product thinking, creative technology, interface design & human centered AI

About02

Things
made
clear.

02
Opening note03

Between the requirement and the interface is where I do my best work.

I can help define the product, design its behavior, and build the experience.

03
Design Engineer2025–

01 / Case study

AI-supported language learning - for humans

A language-learning platform that turns authentic content and targeted grammar practice into personalized study experiences.

Role
Design Engineer
Scope
Branding / Web development / UI/UX design / Marketing
Year
2025–
06
Product Designer & Engineer2025 -

02 / Case study

My-diet.ai

AI-native personalized meal planning platform

Role
Product Designer & Engineer
Scope
Branding / Product strategy / UI/UX design / Web development / AI integration
Year
2025 -
08
Earlier work09

03 / Selected archive

A shelf of
earlier work.

A selection of products and partnerships that shaped how I think, design and build.

09
Brands / Products / Partnerships10
IMTF logo
IMTF
Swiss Re logo
Swiss Re
BLP logo
BLP
DH logo
DH
Index logo
Index
Leonteq logo
Leonteq
RBS logo
RBS
Wondermags logo
Wondermags
10
Working method11

From requirement
to interface.

A line illustration of a toolbox holding design tools
11
My toolbox12

The process depends on the project.

I don't believe in applying the same process to every project. I choose methods and tools based on the goal, timeline, budget, available data, technical constraints and team. My toolbox spans research, product thinking, UX, UI, testing and marketing.

  1. 01

    Research & analysis

    User interviews, surveys, shadowing, data analysis, task analysis

  2. 02

    Product & documentation

    Personas, user journeys, user stories, roadmaps, requirements documentation

  3. 03

    UX & interaction design

    User flows, information architecture, rapid prototyping, interaction design

  4. 04

    UI & design systems

    UI design, design systems, component libraries, microinteractions

  5. 05

    Testing & validation

    Usability testing, user acceptance testing, prototype testing

  6. 06

    Brand & communication

    Branding, social media design, advertising, visual communication

12
Contact13

Catching the micro-moments that make a difference, with too many browser tabs open.

Designed in
Zürich
Built with
Astro / TypeScript
Edition
01 / 2026
13
Next chapter14

Have a complicated thing?

Let’s make
sense of it.

eszter@teszter.com 14