Skip to content
Jan Duras

Hi, I'm Jan Duras

I began in manual QA on high-stakes anti-doping software used at Olympic and FIFA-level events, wrote and managed more than 1,000 test cases, then moved into product design. Today I run Corsius — Google Profile Care for US service companies — through my company, Durasius.

A life-long passion for doing things not just to be OK or make profit, but done and built exactly as they should always have been. Nothing ships broken, confusing, or half-trusted — on my watch.

See Corsius(opens in a new tab)See the proof
Portrait of Jan Duras

Trusted by key people. What people that worked with Jan said

  • “He probably knows this product better than anyone else on the team.” — CTO (Chief Technology Officer), MODOC — Anti-doping done right.
  • “High-quality results in a very short time. Ideas early, creative when challenges hit, value anywhere and anytime — a key player.” — Christian Spies, IT Manager @ PWC · Key MODOC partner
  • “Design skill, creativity, and dedication brought real value to the platform. Committed, detail-oriented — essential to the team.” — Jorge Domínguez Carrión, Anti-Doping Expert & DCO @ PWC · MODOC partner
  • “Immediate and lasting impact — design expertise and ownership. He raised the overall quality of our product and team.” — Marek Kocian, Software testing consultant, CEO at CANNYPACK s.r.o.
  • “Highly skilled with a truly broad range of abilities. Genuinely passionate about projects he believes in — invaluable in business.” — Peter Vnuk, Founder and internet personality @ TechGuru SK/CZ

Proudly had impact on

Testimonials

What people say after working with me

“He probably knows this product better than anyone else on the team.”

…later I was asked to introduce MODOC to every new team member.

CTO (Chief Technology Officer)MODOC — Anti-doping done right.

“With Jan in the MODOC team, we were able to achieve high-quality results in a very short time.

Jan has the skills to contribute to basically all parts of an end-to-end development process. Bringing in aspects and ideas in the brainstorming phase, proposing mockups of future designs in literally no time, reacting to changes and challenges with new creative proposals, and adding value anywhere and anytime in the value chain make him a key player in every marketing campaign or product design.”

“Excellent work on the MODOC project! The design skills, the creativity and the dedication of Jan brought great value to the platform. It has been a pleasure to work with someone so committed and detail-oriented; an essential part of the team.”

“Jan brought a high level of design expertise, ownership, and creative thinking that made an immediate and lasting impact on our product. His work was consistently thoughtful, user-centered, and polished—he was never just designing screens, but solving real problems with clarity and purpose.

His contributions brought a strong visual identity and intuitive user experience that supported our business goals. Jan has the ability to balance visual aesthetics with usability, while always being open, communicative, and easy to collaborate with. Having Jan on board raised the overall quality of our product and team.”

“I have worked with Jan for many years, and beyond being colleagues, we have also built a friendship that could not exist without trust. What I value most about him is not only that he is highly skilled at what he does and has a truly broad range of abilities, but also that he can become genuinely passionate about a project when he believes in its success. In business, that is an invaluable quality.

He excels in web design, as well as working with graphics and video. At the same time, he shows talent in practically any creative field, including branding, marketing, and business strategy.”

Client reactions

Real messages after the work landed

  • “IT IS GREAT, I LOVE IT! Thanks for the great work!”
    on completely rethinking an existing complex feature
  • “Johnny, you are a f***ing wizard 😃 I'm absolutely blown away by both, the website and the video!!”
    on creating a new website and promo video for SaaS
  • “Awesome, awesome, awesome 👏”
    on a new feature design
  • “Thank you, thank you, thank you! AMAZING work on all aspects, website, video(s) and app design! I couldn't be happier”
    as overall feedback to finished work
  • “The proposals look absolutely amazing. I love them ❤️”
    on a feature design proposal
  • “F***!!!! The video is just mind-blowing!!!!! I have no words for this.”
    on crafting a promo video for SaaS
  • “It's amazing. Thanks for your dedication and hard work, it's honestly very nice! ❤️”
    on building a new website and promo video for SaaS
  • “I love it! It's so good, I can't believe it. You are a genius!”
    on a design proposal
  • “Another guy did this for me before you and the result is nowhere near yours. His work got issues, yours is clean and you have a way different touch.”
    on a design proposal
  • “Johnny can do it just... 👌”
    on choosing specifically Jan for a project
Jan Duras (JD)

The story

How I got here

Not a résumé in order. The turns that taught the standard — from making things at eight to shipping work that has to hold up.

Note: Durasius s. r. o. (Durasius) was incorporated in 2024, but there was real work long before it.

  1. 2011–2017

    Age 8–14

    Curiosity became craft

    Self-taught creative — photography, video, first games in GameMaker and PowerPoint, first HTML/CSS site. The habit of making things started here.

  2. 2017–2023

    School years

    Freelance, for real clients

    Brand identity, video, and web design while still in school. Stood at the founding of TechGuru SK/CZ — Peter Vnuk is the founder — on brand, site and marketing, then rebuilt their site in Next.js. That work now runs through Durasius.

  3. 2020–2023

    Still in high school

    Olympic-grade QA

    Joined MODOC as a QA specialist on anti-doping software used at the Olympic Games and major international events. Wrote and managed 1000+ test cases. Post-release bugs dropped hard.

  4. 2023

    After high school

    Full-time, then product

    Went full-time in QA the week school ended. Within months, moved into Product Design & Marketing for MODOC.

  5. 2023–2025

    MODOC & CANNYPACK

    Design that shipped

    Led product design end-to-end — UX, brand, dashboards, onboarding. Multiple successful releases. Direct praise from execs and clients.

  6. 2025

    All in

    Went all in on Durasius

    Incorporated as The Whizziest, s. r. o. on 18 October 2024 — a studio and holding company for products and systems that solve real operational problems. Went all in starting October 2025 and renamed to Durasius on 10 March 2026.

2026–now

Under Durasius

Building Corsius

Building Corsius — Google Profile Care for US service companies — through Durasius.

See Corsius(opens in a new tab)

What I do now

Google Profile Care for US service companies.

Corsius is Google Profile Care for US service companies — Your Google profile. Handled. Free check first; Fix if needed; optional Care. Details live on corsius.com.

Durasius is my company; the product design, brand and website work I've shipped lives there.

Corsius(opens in a new tab)Durasius(opens in a new tab)
Jan Duras

The standard

The standard doesn't change

I've worked across quality assurance, product design, UX, and communication. The lesson has stayed the same everywhere: details matter. A confusing flow, an untested edge case, a website not looking and feeling on point and underselling the company — these are all the same problem wearing different clothes. I notice them. Then I fix them. That is the standard I hold in everything I build.

Education

Formalities in black and white

Formal

Gymnázium Giraltovce

Maturita Diploma — Mathematics & Computer Science

Formal studies ran alongside years of hands-on work in video, design, marketing and business.

Certificate

Google

Google UX Design Professional Certificate

Issued by Google · Nov 2024 · Credential ID L4QMFP4V3X3K

Completed alongside five years on high-stakes software products, including anti-doping systems used at Olympic and FIFA-level events.

Verify credential(opens in a new tab)

Contact

If you want work done properly — or you're curious what I'm building — let's talk.

No form. Write me or find me on LinkedIn — I read everything myself.

jan@durasius.comLinkedIn(opens in a new tab)

See Corsius(opens in a new tab)