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Charles J.CJ

Charles J.

Senior UX Designer | B2B SaaS & Data-heavy systems

€450/day
Witten, DE
3-7 years

Average response time: 1 hour

About Charles

Primarily remote, available for workshops or short on-site sessions in NRW or Berlin/Hamburg if needed.

I help companies turn complex B2B SaaS workflows and analytics into clear, intuitive experiences. With over 4 years’ experience designing for industries like Aviation, E-commerce, AdTech, and Sustainability, I specialise in dashboards, data visualisation, and workflow optimisation.

What makes me different? I bridge UX strategy, product thinking, and data storytelling — so you don’t just get beautiful interfaces, you get tools that speed up decisions and make teams more effective. My work has simplified ad campaign management for airlines, reduced time-to-insight on analytics dashboards, and improved customer flows in travel and retail platforms.

Typical projects I take on:
  • Redesigning dashboards and reporting tools
  • Creating design systems and scalable component libraries
  • Running UX research & usability tests with real users
  • Leading agile design sprints with product and engineering teams
If you need a partner who can make data-heavy platforms feel effortless and deliver measurable impact, let’s talk.
  • English

    Native or bilingual

  • German

    Conversational

Can work on-site
Witten (up to 50km), Düsseldorf (up to 50km), Cologne (up to 50km), Berlin (up to 50km), Munich (up to 50km)

Experience

  • Freelancer
    Senior Product Designer
    TECH
    January 2022 - Today (4 years and 5 months)
    Germany
    So far, I have collaborated with startups across Germany and the UK such as AssetMinder, Rocket Routine, RevMap, Die Marketing Idee, to name a few, applying a user-centric, data-driven approach to every challenge. My work spans 4 industries, including SaaS, marketing, fitness, and industrial technology.

    Highlights:
    • Led discovery workshops with founders/PMs; produced AS-IS → TO-BE maps and prioritised backlogs for B2B startups (AssetMinder, Rocket Routine, RevMap, Die Marketing Idee)
    • Shipped MVP flows and component libraries with usage docs and review rhythms, enabling faster handoff and consistent UI across features
    • Drove evidence-based decisions via moderated usability tests and expert reviews; iterated prototypes into release-ready specs
    User Experience Design User Interface Design MVP Definition Usability Testing Design Systems
  • AERQ (Lufthansa & L.G Electronics)
    User Experience Designer
    AVIATION AND AEROSPACE
    November 2022 - December 2024 (2 years and 1 month)
    Hamburg, Germany
    Designed internal tools for crew operations, inflight feedback, and airline system workflows
    • Designed an ad-management platform, reducing time-on-task by 50% (timed studies)
    • Built a customer-sentiment dashboard that cut time-to-insight by 66% and sped comprehension by 90% (task-based tests)
    • Created a tokenised design system (spacing/colour/data-viz components) mapped to frontend tokens and Storybook for parity
    • Partnered with PM and engineering to ship dashboards and workflows end-to-end, kept a tokenised component set healthy, and ran task-based tests to harden critical paths
    User Experience Design Data visualization User Research Dashboard Design User Interface Design
  • Freelancer
    UX Researcher & Designer
    TECH
    October 2017 - March 2021 (3 years and 5 months)
    London, United Kingdom
    UX work for early-stage products in health & safety, AR tourism, student transport, and event ticketing. Led user research, mapped flows, and co-designed MVPs with startups and founders.
    • Led 100+ interviews and tests across early-stage products; post-session satisfaction typically 4.7–4.9/5 (where measured); shipped MVPs from findings
    User Research User Experience Design User Testing MVP Definition Journey Mapping

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Education

  • Information Technology and Business Information Systems (Bachelor's Degree)
    Middlesex University London
    2017
    Specialized in Human Factors in IT: Explored usability engineering, cognitive ergonomics, and user-centered design principles
  • Software Engineering (Advanced Diploma)
    Aptech
    2015
    Graduated with Distinction; gained a strong technical foundation that supports understanding of front-end development and feasibility of UX solutions

Certifications

  • UX Design (Project Intensive Bootcamp)
    CareerFoundry
    2022
    Information Architecture and User Flows Interative Wireframing and Prototyping Design Documentation and Presentation Emotional and Visual Design Usability and Preference Testing Generative and Evaluative Research User-Centered Design User Personas and Business Requirements Mobile-First and Responsive Design Competitive Analysis
  • Advanced Data Analytics
    Google
    Data analysis Regression & Predictive Analytics Data visualization Statistics for Decision-Making Machine learning A/B Testing & Experimentation Dashboard design Data Storytelling for Business Python SQL

Skill set

Categories