Taking new projectsWarsaw and Poznań · local timeWe reply within one business day5.0 on Google · 25 reviews
fessburnPLStart a project

Product studio · since 2006

We design and build software for clinical, finance, and AI products.

We test the design with the people who’ll actually use it while it’s still a prototype. This way, you can see that it works, and you decide on the full build with real evidence in front of you.

Start a project See our work
Clients
Bayer, Philips, QIAGEN, and Euler
Google
5.0 from 25 reviews
Pricing
Fixed prices, from €2,500
Case 01 of 04Bayer
ICU Angel eligibility checker on a tablet, listing 15 patients against ARDS screening criteria
Critical care · Usability and design

How we made ARDS risk readable at a glance for ICU clinicians

Piloted
We’ve worked with
  • Bayer
  • Philips
  • QIAGEN
  • Euler
  • Merkle Science
  • Syndigo

Selected work

Here are some of the products we’ve worked on.

See all our projects
ICU Angel eligibility checker on a tablet, listing 15 patients against ARDS screening criteria
Bayer · Critical care

How we made ARDS risk readable at a glance for ICU clinicians

Bayer was building ICU Angel, a risk-monitoring platform paired with a drug intervention for ARDS. Clinicians and principal investigators needed to follow a patient's progression and medication response without digging through screens. We designed both views and ran moderated prototype testing across the whole workflow before anything was built. Clinicians went from about 30 seconds to less than 5 seconds to spot a critical change, and the platform went into a pilot.

Piloted
Philips ICU patient monitor interface case study cover
Philips · Medical devices

How we added a new clinical parameter to an ICU patient monitor

Philips needed a new parameter on its bedside monitors. Before any screen was final, we turned the clinical and engineering requirements into 14+ use scenarios, five safety decisions, and uFMEA inputs, so the clinical, risk, and engineering teams could review how the parameter should behave. More than 200 possible use errors went into the uFMEA review, and about 20 participants took part in the formal usability study.

Services

Here’s how you can work with us, and what each step costs.

  1. Step 1 · 1 to 4 weeks

    Diagnose

    €2,500 from

    We review what you have right now and rank every finding by risk, so you know what to fix first. You get a written report and a fix plan to keep.

    • Usability Review for IEC 62366-1, from €6,000
    • Accessibility Audit for the EAA and WCAG 2.2
    • AI Feature Review for AI Act Article 50
    • Product Readiness Review for AI-built MVPs
  2. Step 2 · 3 to 4 weeks

    Prove

    €9,500 from

    This is the Evidence Sprint. We build a working prototype of the riskiest part of your product and test it with real users. You then decide on the full build with the test results in front of you.

    • A prototype tested with 5 to 8 users
    • A written test report
    • A fixed price for the build, or a decision to stop
  3. Step 3 · 6 to 16 weeks

    Build

    €25,000 from

    The same team that ran the research designs and builds the product, so the reasons behind each design decision make it into the code.

    • Web and mobile apps
    • AI integration and design systems
    • Documentation and the usability file
  4. Step 4 · monthly

    Keep

    €2,500 a month

    After launch, we stay on as your product team. New features get the same usability checks as the first release, and you get a health report every month.

    • Releases and regression checks
    • Usability checks on new features
    • A monthly health report

Industries

We mostly work with health, finance, and AI teams.

Health and medtech

In clinical tools and device software, a use error can lead to harm for a patient. That's why we plan the IEC 62366-1 usability engineering file from the first workshop, and don't leave it until the design is finished.

MDR transition ends31 Dec 2027

Finance and compliance

If KSeF rejects an invoice, a lot of finance apps just show the error code from the system behind them. We design the screen that lets the person know what went wrong and what to do next. For us, the failure modes come first, and the happy path comes after that.

KSeF for micro-businesses1 Jan 2027

AI products

A demo is a simulated environment, but real users paste in messy data and take the answer at face value. We design how your AI feature tells people they're dealing with AI, and how they can recover when the model gets it wrong.

AI Act Article 50since 2 Aug 2026

The Fessburn Evidence Loop

This is how we run every project, step by step.

Every project goes through the same six stages, whoever on the team is running it. We move to the next stage once the current one has evidence behind it, like a test report or a scope you’ve signed off. This way, what you pay to build is something real users have already tested.

  1. 01

    Understand

    We interview your users and work out which regulations apply to your product.

  2. 02

    Prototype

    We build a working version of the riskiest part of the product in a few days.

  3. 03

    Test

    Real users try real tasks on the prototype, and we write down what happened.

  4. 04

    Decide

    You get a go or no-go and a fixed price for the build. You can stop here.

  5. 05

    Build

    The same team designs and codes the product and ships it in weekly releases.

  6. 06

    Verify

    When the release is ready, we check it against what we found in testing.

What we commit to

  • We reply within one business day
  • Every project has a named lead
  • You get a written update every week
  • The price is fixed for the scope we agree on
  • You own everything we make once it's paid for
  • We'll sign an NDA before the first call if you want one

From our clients

“Thank you for creating our website. We loved working with you and appreciate the timely delivery of the pages. It was a great journey thanks to all your hard work.”

Angelique PrandeckiOwner of a hot tub prescription store
Conversion rate
+73%
Customer retention
+50%

“Fessburn has been an excellent company to work with! They are all remote, and so you have to account for some time differences. But they are very responsive to our requests and do excellent work! We have used them for product and web design projects. We highly recommend them!”

Andy StylesFounder of a tech startup
Conversion rate
+52%
Customer retention
+11%

“I came across this company through Dribbble. I was pretty hesitant to start, but I was ecstatic with the results. The first version was delivered within 24 hours as promised. I highly recommend them!”

Peace AmdiMarketing manager
Read all 25 of our reviews on Google

Made by Fessburn

We also design, build, and run our own products.

Not all design problems are in the Figma file. Some only show up once you push a product to production and people start using it live. Running our own apps is how we learned to plan for those problems in client work.

  • Live

    InvoiceRate

    KSeF invoicing for Polish sole traders, on iOS and Android

    3,000+ users
  • Live

    RebrandOS

    Write a post once, approve it, and publish it to 8 social networks

    500+ users
  • Live

    Relaystack

    Finds leads and runs outreach for sales teams, with voice agents

    relaystack.ai
  • Concept

    UserPersona.ai

    Turns a plain-language brief into an AI role you can test before it goes live

    In development

The team

These are the people you’ll work with.

Every project has a named lead from this team, and you talk to the people doing the work from the first call to the launch.

  • Gideon AwolesiFounder, product designer and usability engineer
  • OlamideDesigner
  • PaulSoftware developer
  • ZofiaBusiness manager
  • WiktoriaSales specialist

Questions

Questions people ask us before a project

How much does a project cost?

Every step has a published starting price. A Diagnose review starts at €2,500, an Evidence Sprint at €9,500, and a full build at €25,000. After our first call, we send you a fixed price for your scope. That price only changes if the scope changes.

Can we start small?

Yes. You can start with a Diagnose review or an Evidence Sprint. Each step ends with a document you keep, and you're free to stop after any of them.

Do you work on regulated products?

Yes. We've done usability engineering on ICU monitoring, diagnostics, and surgical workflows. We plan the IEC 62366-1 usability file from the start of the project, instead of writing it at the end.

Who owns the work?

You do. Once the invoice is paid, the designs, the code, and the documentation are yours. We'd like to show the project in our portfolio, but if you'd rather we didn't, we'll leave it out.

Do you work with clients outside Poland?

Yes. The team works from Warsaw and Poznań, in English and Polish, and we work with clients in the EU, the UK, and the US. We plan our calls around your time zone.

How do you use AI in your work?

We use AI tools to prototype and build faster. A person on our team reviews everything before it reaches you, and we only put your data into tools you've approved.