Premium UX/UI & App Development for Startups and Enterprises
Boutique but global: delivering world-class design, seamless implementation, and products users love.
“Insanely fast and thorough — they always go above and beyond.” – Tara, Co-founder at RealRoots
[ SERVICES ]
From design systems to full-scale apps — we cover the whole journey of building digital products.
UX/UI Design
We design interfaces that are both intuitive and beautiful. From SaaS dashboards to mobile apps, we turn complex problems into simple, engaging user experiences that help your product shine and convert.
Design System
Consistency at scale. We build robust design systems with tokens, libraries, and guidelines that keep your product and brand experience aligned — no matter how fast you grow.
Custom Apps & Implementation
Together with our close partners, we deliver everything from Webflow websites to fully custom web and mobile apps. Our process is fast, reliable, and tailored to your exact business goals.
NEW
AI Consulting & Agents
We guide companies into the AI era. From strategy workshops to production-ready AI agents, we make sure you not only understand AI — but actually use it to create real business value.
We adapt to your stage — whether you’re a startup moving fast or an enterprise scaling globally.
[ SELECTED WORK ]
Turning ideas into digital reality
YC Summer ‘25 — San Francisco
RealRoots
We partnered with RealRoots, a YC-backed startup helping women build meaningful friendships, to move fast from idea to product.
• Mobile app UX/UI design
• Mobile app implementation
• Website UX/UI design
• Webflow implementation
• Firebase functions
Tim & his team are a dream to work with. They are insanely fast and thorough — we’d often hand off a loose idea at the end of the day and wake up to a polished solution.
Tara Koppel, Co-founder & COO
YC Winter ‘22 — New York
Benson
Benson is reinventing retail investing with voice-first interactions. We worked closely with the founders to design and launch both the product and its presence.
• Mobile app UX/UI design
• Website design & Webflow implementation
• Voice AI agent
Cassini Challenge winners - Slovenia
Space Guardian
Collision-Avoidance Marketplace for Satellites
Our own venture, Space Guardian, showcases how we approach design and innovation at scale. From visual identity to complex web app design, we shaped a product that speaks to both operators and investors.
• Corporate brand design
• Web app UX/UI design
It’s crazy how great your design system is. When we got it into our hands it felt like magic for developers because everything was structured like we structure it in code.
LUka zlatečan, ceo
[ WHY US ]
Built on Trust.
Proven by Results.
Proven Track Record
We’ve worked with 80+ clients in 10 countries — from YC-backed startups to global enterprises. Our designs power products used by thousands of people every day.
Speed & Reliability
We’re over-achievers who move fast without cutting corners. Clients describe us as “insanely fast and thorough” — and we take pride in always delivering on time.
Design + Implementation
We don’t stop at pretty screens. From UX/UI and design systems to Webflow and full custom apps, we turn concepts into working products.
Hands-On Founders
You’ll work directly with us — no layers of managers, no outsourcing. Every project gets our personal focus, energy, and commitment.
Tara Kappel
CPO RealRoots
Tim & his team are a dream to work with. They are insanely fast and thorough — we’d often hand off a loose idea at the end of the day and wake up to a polished solution. Their speed, clarity, and commitment to getting it right — while working within our systems — has saved us a ton of time and helped us accelerate our growth. They’re also so easy to work with: extremely collaborative and communicative, and always go above and beyond to make sure we get what we want. I can’t recommend working with them enough!
Rok Gregoric
Founder ShortCast
I work with 350life and I am really happy with the relationship. They deliver what we need, are always on-time and are really flexible. A real joy to work with! I am recommending them to all my closest friends.
Jonathan Manuzak
CoFounder Keep Technologies
350life is an incredible design team. They are thoughtful, strategic, and have an eye for clean and modern design. They were able to get up-to-speed on complex business processes and applications shockingly quickly. The deep understanding they were able to develop makes the experience design process much smoother and produces a high quality.
Daniel Pannrucker
CEO Lama Partners
I got to know the team through a recommendation from one of my clients. We came to an agreement relatively quickly. The collaboration impressed me very much. As we are an investment company that builds up or converts new companies, I directly commissioned the team for the next company.
Rok Lenardic
CEO Indigo Labs
Thanks to 350life's work, the app was delivered on time and within budget. User onboarding was quick and painless from the get-go. The team was very responsive and open to discussions and communication. They iterated extremely fast to get to where the client wants to be.
Rachelle Brempong
Co-founder Bettershot
350Life didn’t just improve our website—they legitimated our startup. Their UI/UX work was next-level, and they saw onboarding issues before we did. If you want a team that truly understands design and user experience, they’re it.
[ ABOUT ]
Yes, more and more work is leveraging AI, but there are real people behind 350life.
ABOUT 350life
350life started in Slovenia, born out of frustration with poor user experiences at our former workplace. We began redesigning apps and websites on our own — some never saw daylight, but the ones that did sparked something bigger. That spark grew into a design-led studio, now trusted by 80+ clients in 10 countries.
We’re boutique but global. Startups love us for our speed and reliability, and enterprises trust us for our consistency and polish. Wherever we work, our promise is the same: we don’t just deliver — we over-deliver.
Meet the Founders
350life is run by Tea and Tim.
• Tea specializes in design systems and UI design. Her work is pixel-perfect, developer-friendly, and built for scale. LINKEDIN
• Tim focuses on business, product strategy, and UX. He translates client vision into actionable steps that drive results. LINKEDIN
Working directly with us means no layers, no wasted time. You get two hands-on founders fully committed to your success — fast responses, transparent timelines, and a personal touch.
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Let’s build something great together.
*We reply the same day — often within hours.
