Design is learning.
I believe great design comes from curiosity, experimentation, and learning from every project.
Selected work
Every project is a lesson. These case studies explore the learning journey behind each design decision and the insights gained along the way.
LILT Agent: Lesson in building for (and with AI)
Designed and built an AI agentic interface to simplify translation for non‑localization users; prototyped in code (Cursor, Claude Code, Gemini CLI) with rapid iteration. In beta with raving enterprise feedback.
Lifetramp: A lesson in running a startup
Built a mission-driven platform and learned what it takes to ship, grow, and make hard trade-offs as a founder.
LILT Design System: Cross‑functional collaboration
Introduced a scalable design system to align design and engineering, improving quality and delivery speed.
LILT Workflows: Managing complexity
Designed workflows that simplify complex project lifecycles without sacrificing power for expert users.
LILT: Staying in the flow
Optimized the core product to help professionals focus on high‑value work and reduce cognitive load.
Learning through design
These are some core principles I follow when working on design projects. Each one shapes how I approach problems, collaborate with teams, and create meaningful solutions for users and businesses.
Kaizen
The Japanese philosophy of continuous improvement through small, incremental changes. By getting just 1% better every day, we create lasting transformation in our design process and outcomes.
Purpose-Driven Design
Learning to understand the 'why' behind every decision. Great design solves real problems and creates meaningful experiences for users.
Collaborative Growth
The best learning happens together. I value feedback, diverse perspectives, and the collective wisdom of teams working toward common goals.
Hypothesis-driven
Design that converts and helps the user reach their goals thanks to constant experimentation.
What people say
Testimonials from colleagues, clients, and collaborators I've had the pleasure to work with.
"Mariusz is a phenomenal designer and the reason we were able to build so rapidly. His turnaround time on high fidelity mock-ups was incredible and we rarely had to iterate on his initial designs because he understood the product and our users so well."
"Mariusz is an incredible product designer. He always made my job as a Product Manager easy. His designs are always comprehensive. He immerses himself in the customer journey. His thorough research is evident in his designs."
"Working alongside Mariusz was one of the great privileges of my design career. He can take the most complicated problems and design beautiful and functional solutions with ease and swiftness. Mariusz is a true design leader and would be an invaluable teammate and asset to any design organization."
"Mariusz is an absolute pleasure to work with. He's a seasoned design leader and does an excellent job managing the customer and business goals in tandem with the product design. I give him my highest recommendation!"
"Mariusz has a great combination of skills. He's highly creative, very technical, and very practical at the same time. I worked with him on a highly innovative, boutique product that needed to bend the rules from anything we have done in the past. Mariusz was the perfect designer for this. He was always steps a head of me and brought really great ideas to the table that made large impacts to the product and still worked within our timeline."
Latest thoughts
Exploring design, technology, and the continuous learning journey through writing and reflection.
Let's learn together
The best learning happens in collaboration. Whether you're looking to solve a design challenge or explore new possibilities, I'd love to learn from your perspective.