Mariusz's Avatar

Mariusz

@mariusz.cc

Product / Service / UX Design, Leadership, Ethics, Yelling at clouds. ⚡️ Languages. ⚡️ Taking photos. ⚡️ Screamy music ⚡️ Often seen dumping links to what I read. 🔴⚫️ I don’t know what HD is but my doctor says I have eighty of them.

1,316
Followers
513
Following
1,932
Posts
22.05.2023
Joined
Posts Following

Latest posts by Mariusz @mariusz.cc

Preview
LukeW | Showing the Work of Agents in UI As AI products lean more heavily into agentic capabilities, the same design challenges keep surfacing across projects. Here's a look at how we've approached one...

Whether people are using agentic products for coding, data analysis, or writing, some users find the agent's work overwhelming and want the interface to focus purely on results. Others say seeing that work is essential for monitoring and checking what the agent is doing.

lukew.com/ff/entry.asp...

06.03.2026 14:41 👍 0 🔁 0 💬 0 📌 0
Preview
Five research questions that provide the foundation for good design An evidence-based approach for determining the viability of product ideas

Making space for these five straightforward questions introduces evidence early. The answers to them can provide a simple checkpoint between “I think” and “I know” that helps determine whether a product idea is well supported and likely to succeed.

adobe.design/stories/proc...

06.03.2026 09:44 👍 1 🔁 0 💬 0 📌 0

ACAB includes Proton btw

05.03.2026 21:58 👍 1 🔁 1 💬 0 📌 0
Screenshot of The Guardian with the top 42% taken up by some car ad and the bottom 42% by another ad from the newspaper asking for money.

Screenshot of The Guardian with the top 42% taken up by some car ad and the bottom 42% by another ad from the newspaper asking for money.

Web design in 2026 leaving a small gap where you can just about read the headline

05.03.2026 15:27 👍 43 🔁 11 💬 1 📌 1

Yeah I get why people use ChatGPT to replace Google too because Google is just garbage results for first 10 pages lol

05.03.2026 15:56 👍 3 🔁 0 💬 0 📌 0
Design docs considered harmful Hot takes and cold truths on software, startups, and the lies we tell ourselves.

The fundamental problem with design docs is the same one that killed waterfall: you have the least information at the beginning of a project, which is exactly when design docs ask you to make the most decisions.

www.lucasfcosta.com/blog/design-...

05.03.2026 14:39 👍 0 🔁 0 💬 0 📌 0
Preview
The Last 20% and Who's Asking Why? Everyone can build now. Almost nobody stops to ask if they should.

Democratizing access to design tools is genuinely good. I believe that. The problem is the assumption that because someone can produce a thing that looks like a designed product, they’ve done the work of design.

chadsnewsletter.substack.com/p/the-last-2...

05.03.2026 09:20 👍 0 🔁 0 💬 0 📌 0
Preview
Mariusz Cieśla | Principal Product Designer Product Designer & Design Lead based in Berlin. Design systems, UX research, AI prototyping, and product strategy.

So as I wrap up my role at LILT I am now officially on the market.

Looking for Senior/Staff or Lead Designer role on a team that solves an interesting problem and cares deeply about their users, preferably remote-first.

work.mariusz.cc

#ProductDesign

04.03.2026 09:29 👍 0 🔁 0 💬 0 📌 0

Aw yis, that's what I've been looking for. Thanks.

03.03.2026 12:12 👍 0 🔁 0 💬 0 📌 0
Preview
Lisan Al Gaib GIF ALT: Lisan Al Gaib GIF
03.03.2026 11:49 👍 2 🔁 0 💬 0 📌 0

Is anyone exploring layouts and components as data in design systems? I feel like we have Design Tokens basically solved with DTCG JSON and maybe it's worth looking a layer higher for a neutral notation of components that would be then converted to whatever tool needs them.

03.03.2026 11:48 👍 1 🔁 1 💬 1 📌 0

Bing makes enough money being an API for all the “private” search engines that feed your data to Microslop

03.03.2026 11:35 👍 2 🔁 0 💬 0 📌 0

I didn’t know Microslop was a thing until I saw headlines about Microsoft trying to ban Microslop on its Discord. Now I shall say Microslop a lot. That’s how it works.

It’s good when Microsoft, a company that likes genocide and environmental destruction, doesn’t like things.

03.03.2026 11:03 👍 2442 🔁 599 💬 43 📌 12
Preview
The hidden cost of AI prototypes that are made to die How product teams should evaluate AI-generated UI

The hidden cost of AI prototypes is that they can’t move forward. And when the underlying output is treated as “disposable” automatically, product teams pay for it later in the product lifecycle through translation work, rewrites, and reduced speed.

uxdesign.cc/the-hidden-c...

02.03.2026 14:51 👍 1 🔁 0 💬 0 📌 0

The real power of a design system comes from its foundations. Elements like tokens, spacing logic, typography scales, semantic naming, and layout principles do much more heavy lifting than the visible components ever could.

medium.com/@vandanapraj...

#DesignSystems #ProductDesign

02.03.2026 09:43 👍 1 🔁 0 💬 0 📌 0
Preview
Design Still Derisks Dev I built a design system in a weekend.

Prompting is lossy. You can describe what you want in a hundred different ways and still lose the nuance. A well-structured Figma frame is a high-fidelity specification. It carries more signal in one frame than a paragraph of instructions ever could.

robertritacca1.substack.com/p/design-sti...

27.02.2026 14:41 👍 2 🔁 0 💬 0 📌 0
Preview
The AI Productivity Paradox AI was supposed to free up creative time. Instead I spend more time reviewing and fixing AI output than I ever imagined.

“The problem is that producing was never the hard part. Thinking was the hard part. Making good decisions was the hard part. AI doesn’t do that for you. It just gives you a pile of “done” that isn’t.”

27.02.2026 09:44 👍 0 🔁 0 💬 0 📌 0
Preview
How I’m dealing with the pressure to adopt AI as a designer — mynameismartin I’ve spent the last month trying to catch up with AI in design, and I have news. Things haven't settled, the ground is still moving, and sitting with uncertainty might be the best position right now

You wouldn't adopt a new approach or tool without being sure it had a positive outcome for your work. AI is no different, and it doesn't get a free pass just because the discourse is louder.

www.mynameismartin.co.uk/blog/how-im-...

#ai #productdesign

26.02.2026 14:39 👍 0 🔁 0 💬 0 📌 0
Preview
Product roles in the age of agentic AI development I was watching Office Space the other night. There's this scene where the Bobs are interviewing Tom, the product manager. They're trying to understand what he does there. Tom's (frustrated) answer is…

With agentic AI coding, the IC-level product manager is about to profoundly change again.

If you can describe/iterate to what you want built, you can build it without waiting for someone to translate your intent. The prompt is the spec.

world.hey.com/cpinto/produ...

#ai #productmanagement

26.02.2026 09:20 👍 0 🔁 0 💬 1 📌 0

That’s a great tagline Andy.

24.02.2026 09:37 👍 2 🔁 0 💬 1 📌 0
Preview
8 learnings from 1 year of agents – PostHog AI - PostHog Today we launch PostHog AI, the AI agent built into PostHog . A year in the making, we've gone a long way from our first chat prototype made over a…

“Context is everything for an LLM - when every layer of abstraction introduces loss of context, the ability to string tools together and self-correct course washes away.”

posthog.com/blog/8-learn...

#ai #llm

23.02.2026 14:51 👍 0 🔁 0 💬 0 📌 0
Preview
Claude Code for Designers: A Practical Guide A Step-by-Step Guide to Designing and Shipping with Claude Code

If you’re a designer looking to get into Claude Code, this is one of those guides that you probably need to read if you want to be more efficient.

nervegna.substack.com/p/claude-cod...

#ai #ux #claudecode

23.02.2026 09:43 👍 1 🔁 0 💬 1 📌 0
Preview
Hackers Expose Age-Verification Software Powering Surveillance Web Three hacktivists tried to find a workaround to Discord’s age-verification software. Instead, they found its frontend exposed to the open internet.

Oops. Turns out Persona, Discord’s age-verification service, was secretly screening selfies against government watchlists AND accessible by the feds. It's backed by Peter Thiel.

“The state wants to see everything. The corporations want to see everything. And they've learned to work together.”

21.02.2026 22:57 👍 6088 🔁 3894 💬 71 📌 270

Most mainstream social media these days is just bots talking to bots and people using bots to produce everything because ultimately posting is a low perceived value activity to get exposure.

In short, Dead Internet Theory is no longer a theory.

22.02.2026 00:11 👍 1 🔁 0 💬 0 📌 0
Preview
Accessibility is the origin of human-centered design Discover 10 human-centered innovations that started with real people’s needs and evolved into UX principles that is shaping today’s most inclusive products.

Today’s UX research and product leaders can look to accessibility as a blueprint for sustainable, human-centered design innovation.

makeitfable.com/article/acce...

20.02.2026 14:41 👍 0 🔁 0 💬 0 📌 0
Preview
Above and Below the Waterline: Why Most Leadership Teams Fix the Wrong Problems Every meeting happens on two levels simultaneously. It doesn’t matter if it’s a team meeting, management meeting or people coming together for dinner. It just happens on two levels.

What's below the waterline doesn't improve with time. It doesn't get solved by better strategy documents or new OKR frameworks. It gets solved when someone with authority is willing to name it and create space for the team to work through it together.

leaveamark.xyz/resources/ab...

20.02.2026 09:44 👍 0 🔁 0 💬 0 📌 0

Once, technology solved problems. People liked having problems solved, so they liked technology.

Tech execs started to think of that sentiment as their due. So when they stopped solving problems, and people stopped liking them, they became outraged. "How dare you not love whatever we give you?"

19.02.2026 16:22 👍 1369 🔁 376 💬 19 📌 21
Preview
The AI delegation matrix: what parts of your UI shouldn’t exist? A practical scoring model to decide when to Delegate, Assist, or stay Human-Led.

The AI delegation matrix: what parts of your UI shouldn’t exist?

uxdesign.cc/the-ai-deleg...

19.02.2026 14:39 👍 0 🔁 0 💬 0 📌 0
Preview
Craft, Stewardship, & Choosing Your Own Destiny in a New Era of Design What do product design careers look like in this new world of AI? I think it's more excitement than doom and gloom.

You review a design and think, “This works, but it does not feel like us.” You catch a small inconsistency that no one else noticed, yet you know it will cause confusion later. This is stewardship.

chadsnewsletter.substack.com/p/craft-stew...

19.02.2026 09:20 👍 0 🔁 0 💬 0 📌 0

Filters, facets, and guided options reduce memory load and make work tools more usable.

uxdesign.cc/are-we-doing...

19.02.2026 08:30 👍 2 🔁 1 💬 0 📌 0