CASE STUDIES

Selected work

Complex B2B products made simple enough that people adopt them.

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

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→

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

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→

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

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→

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

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→

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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

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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

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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

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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