Portrait of Raphael Diftopoulos, Senior Product Designer

I’m Raphael! 👋

A Senior Product Designer with 9+ years turning complex, data-heavy workflows into simple products teams actually adopt.


At 90POE, the voyage Estimator saw 400% adoption growth after I led its redesign. At Workable, I redesigned the candidate profile and pipeline, the product’s most-used feature, so recruiters can act without leaving the profile.


Since February 2026 I’ve been a Senior Product Designer at Levellr, building a product that gives fans a real say in the products they love. I design how their voices reach the teams who make those products, in a way they can act on.

BACKGROUND

I started in economics, realized design was what I loved, and moved from graphic design at Stream Team in Thessaloniki into UI/UX at Mind-Alliance. Since then I’ve worked on products where the complexity is the point: voyage estimation at 90POE, the core hiring workflow at Workable, and grocery delivery for Saudi Arabia at Mart. Alongside work, I’m completing a BA (Hons) in Graphic Design at AKTO, in partnership with Middlesex University.

WHAT I DO

I’ve managed designers at Mart and 90POE and run 32 mentoring sessions in 10 countries on ADPList. Lately I’ve moved prototyping from Figma to AI.

HOW I WORK

I design for adoption: clarity, accessibility and long-term impact.

MY DESIGN PHILOSOPHY

Three principles behind my work

Adoption is the bar. Craft is how I clear it.

A design is only done when people choose it over their old workaround. At 90POE that meant replacing Excel-based voyage estimation with a tool operators actually adopted.

Adoption is the bar. Craft is how I clear it.

A design is only done when people choose it over their old workaround. At 90POE that meant replacing Excel-based voyage estimation with a tool operators actually adopted.

Adoption is the bar. Craft is how I clear it.

A design is only done when people choose it over their old workaround. At 90POE that meant replacing Excel-based voyage estimation with a tool operators actually adopted.

Systems over screens

I build the foundations teams scale on: tokens, components and clear documentation. I’ve built or led design systems at Workable, 90POE, Mart and Levellr.

Systems over screens

I build the foundations teams scale on: tokens, components and clear documentation. I’ve built or led design systems at Workable, 90POE, Mart and Levellr.

Systems over screens

I build the foundations teams scale on: tokens, components and clear documentation. I’ve built or led design systems at Workable, 90POE, Mart and Levellr.

Prototype with AI, validate with people

I make design systems readable by AI, so Claude Code can generate realistic, on-brand prototypes in hours. Then I test them with real users before anything ships.

Prototype with AI, validate with people

I make design systems readable by AI, so Claude Code can generate realistic, on-brand prototypes in hours. Then I test them with real users before anything ships.

Prototype with AI, validate with people

I make design systems readable by AI, so Claude Code can generate realistic, on-brand prototypes in hours. Then I test them with real users before anything ships.

CASE STUDIES

Selected work

90POE Case Study Intro

Maritime teams dropped Excel for the Estimator

Operators double-checked the Estimator’s numbers in Excel before deciding, because they didn’t trust them. I led the redesign of 90POE’s Estimator, a voyage profit calculator, around a KPI-first workspace. The result: 400% adoption growth.

90POE

·

2023–2024

Maritime

Pricing & KPIs

Enterprise UX

Read case study

→

90POE Case Study Intro

Maritime teams dropped Excel for the Estimator

Operators double-checked the Estimator’s numbers in Excel before deciding, because they didn’t trust them. I led the redesign of 90POE’s Estimator, a voyage profit calculator, around a KPI-first workspace. The result: 400% adoption growth.

90POE

·

2023–2024

Maritime

Pricing & KPIs

Enterprise UX

Read case study

→

Workable Case Study

Recruiters act on candidates without leaving the profile

Recruiters often had to leave the candidate profile to email, evaluate or move a candidate. I redesigned the profile and pipeline, Workable’s most-used feature, so those actions happen in place. CV uploads got 3× faster.

Workable

·

2019–2021

HR-tech

SaaS

Workflow optimization

Read case study

→

Workable Case Study

Recruiters act on candidates without leaving the profile

Recruiters often had to leave the candidate profile to email, evaluate or move a candidate. I redesigned the profile and pipeline, Workable’s most-used feature, so those actions happen in place. CV uploads got 3× faster.

Workable

·

2019–2021

HR-tech

SaaS

Workflow optimization

Read case study

→

thumbnail Image

Designed Mart’s native grocery app for Saudi shoppers: aisle-style browsing, multi-household carts, and stock-safe checkout on one design system.

Mart

·

2019

Retail

Cross-platform UX

Design Systems

Read case study

→

thumbnail Image

Designed Mart’s native grocery app for Saudi shoppers: aisle-style browsing, multi-household carts, and stock-safe checkout on one design system.

Mart

·

2019

Retail

Cross-platform UX

Design Systems

Read case study

→

thumbnail Image

Redesigned Hertz’s booking experience across web and mobile, driving a 347% increase in time spent per visit and reducing bounce rates by 38%.

Hertz Autohellas

·

Travel tech

E-commerce UX

Web & Mobile

Read case study

→

thumbnail Image

Redesigned Hertz’s booking experience across web and mobile, driving a 347% increase in time spent per visit and reducing bounce rates by 38%.

Hertz Autohellas

·

Travel tech

E-commerce UX

Web & Mobile

Read case study

→

© 2026 Raphael Diftopoulos. All Rights Reserved.

Last updated: October 2026

© 2026 Raphael Diftopoulos.
All Rights Reserved.

Last updated: October 2026

© 2026 Raphael Diftopoulos. All Rights Reserved.

Last updated: October 2026