# mjankowski.expert — full content > Mariusz Jankowski — Product Architect. 26 years across the full digital product lifecycle (animation → graphic design → UX/UI → complete builds). Builds his own digital products and helps founders and businesses with websites, web apps, mobile apps, AI agents and product audits. Based in Warsaw, Poland, working async worldwide. ## About Mariusz Jankowski 26 years in digital product: from animator and graphic designer to UX/UI specialist with the technical skills to build complete products, mastering the full lifecycle for global corporations and top agencies. Today he builds and runs his own digital products (SmartKcal, LinguPix, RadarM, lead.watch, SizzleAir, TrustBar) and helps founders and businesses build theirs. ## What I Build No public pricing: a direct email is the only call to action. ### WEBSITES & WEB APPS A custom website that loads fast, looks premium and turns visitors into clients. Designed, built and launched by one person, end to end. Included: - Custom design, no templates - Responsive Web Design (RWD) - Fast loading on every device - SEO and AI-ready: GEO / AEO - Custom animations: GSAP / Framer Motion - Web apps with backend included - Modern stack or Webflow / Bubble - MVP development for startups - Fast delivery ### AI AGENTS & INTEGRATIONS AI that does real work in your product. AI assistants and business process automations built into your apps and your daily work. Included: - AI assistants in your app - Automations for your daily work - Connected to the tools you already use - Your documents as a knowledge base (RAG) - Private AI in the cloud: Azure / AWS - Results you can measure ### MOBILE APPS Your product in people's pockets. Custom native iOS and Android apps, from first sketch to the App Store. Included: - Native apps for iOS and Android - Published to the App Store and Google Play - In-app purchases and subscriptions - UX and UI first, then code - Modern stack - Support after launch ## Projects ### SmartKcal — Own Product Track your calories effortlessly with an AI-powered app. - Role: Founder & Engineer - Tags: iOS App, AI Powered, Health, Fitness - Live: https://smartkcal.app ### LinguPix — Own Product Swipe to Remember: language learning for kids aged 3-7. - Role: Founder & Engineer - Tags: iOS, Android, Education, Kids - Live: https://www.lingu-pix.app ### RadarM — Own Product A Chrome extension that checks an apartment before you buy it. - Role: Founder & Engineer - Tags: Chrome Extension, Real Estate, PDF Reports, Risk Check - Live: https://www.radarm.pl ### lead.watch — Own Product A downloadable n8n blueprint that turns Reddit into a lead engine. - Role: Founder & Engineer - Tags: n8n Blueprint, Automation, Reddit Leads, AI Powered - Live: https://www.lead.watch ### SizzleAir — Own Product A tiny thermal assistant for MacBook Airs. - Role: Founder & Engineer - Tags: OSX App, Menu Bar, Thermal Assistant, Performance - Live: https://www.sizzleair.app ### TrustBar — Own Product Verified TrustMRR metrics. - Role: Founder & Engineer - Tags: OSX App, Menu Bar, Startup Metrics, Micro-SaaS - Live: https://www.trustbar.app ### Fit Diet Catering — Client Work Diet catering ordered online, delivered across the Netherlands. - Role: Lead Engineer, 2020–2026 - Tags: Webflow, E-commerce, Online Store, Fitness - Live: https://www.fitdiet.nl ### Cowork by Memos — Client Work Coworking, desks and conference rooms. Booked online. - Role: Web Designer & Developer - Tags: Webflow, Coworking, Office Space, Conference Rooms - Live: https://www.memos.work ### SpaceAds — Client Work A website for a marketing agency, designed to stand out. - Role: Web Designer & Developer - Tags: Webflow, Marketing Agency, Google Ads, Meta Ads - Live: https://space-ads-01b17e6efe931a0057ba35b1c77a5.webflow.io ### Tigers — Client Work A website for a digital marketing agency, from social to SEO. - Role: Web Designer & Developer - Tags: Webflow, Digital Marketing, Social Media, SEO - Live: https://www.tigers.pl ## Webflow Book [Projekty w Webflow](https://mjankowski.expert/webflowbook): Polish-language ebook of practical Webflow tips and workshop-style walkthroughs, first released in February 2023 (launched on radarpremier.pl, a Polish Product Hunt; the original sales page is gone). Past buyers verify their purchase email on this page to regain access to the guide in Notion. Not on sale at the moment. Chapters: Introduction; Automatic „padding” and „margin”; The 20-collection CMS limit per page; Custom text underline; Hidden form field; Smooth scrolling: Lenis and native scroll; E-mail field validation: Make and APILayer; VAT ID field validation: VatLayer; Automatic positioning with Flex; Oh, that miserable SVG: optimization, SVG as a font, One Click SVG from Figma to Webflow; Do not use the Button component in Webflow; A super method for „Aspect Ratio” on images; Working in Webflow like a developer: CodeSandbox and „localhost”; Pseudo-elements in Webflow and dynamic content; Dynamic „option” in a „select” field from the CMS: JavaScript and the native method; Automatic XML data import into Webflow; Closing notes ## Wallpaper Pack [Liquid Lava Gradient Wallpaper Pack](https://mjankowski.expert/en/wallpapers): Liquid Lava Gradient Wallpaper Pack: 12 original dark colorways based on the flowing gradient from mjankowski.expert. Each purchase includes 24 PNG wallpapers: 12 desktop files at 6016×3384 and 12 mobile files at 1320×2868. Subtle film grain keeps transitions smooth on large monitors and OLED displays. The $15 personal-use pack includes lifetime access to future colorway updates and will be sold through Polar. Colorways: Liquid Lava; Magma; Dark Space; Rainbow of Tolerance; Solidarity; Mourning; Fresh Mint; Mono Rocks; Drive; Arctic; Amber Noir; Velvet ## Contact - [Contact section](https://mjankowski.expert/#contact): direct email on the site - [X / Twitter](https://x.com/MarJani81) - [LinkedIn](https://www.linkedin.com/in/jankowskimariusz/)