Hey!,
I'm Jai
Senior product designer, based in Germany. Thirteen years on marketplaces, platforms, and SaaS products, focused on making the complicated parts invisible to the people who use them.
Six projects. I defined the problem, set the direction, and owned the outcome.
B2B eSIM Platform
Before a single wireframe, I ran stakeholder workshops with sales, finance, and legal to define the object model. Then I built the entire platform solo: roles, permissions, billing, reporting. Shipped to three reference clients across different industries.
Seller Photo Moderation
I pushed back on the brief. The real problem wasn’t the copy. It was that the system knew things the seller couldn’t see. Redesigned from information architecture up, across 100M+ users.
Photo Studio
I had already mapped the correction problem with PQT. Photo Studio was where that map became a product. I designed the editor flow for web and mobile: white background removal, resolution upscaling, watermark detection, in 2 taps, without the seller ever leaving the platform. The team shipped it after I left.
MedEspañol
Built from zero: a health navigation platform for Spanish speakers in Germany. AI-assisted triage, Arztbrief interpretation, doctor video consultations. Designed, shipped, and running in production at medespanol.org.
Checkout Unification
I ran the audit myself to prove unification was worth it. Mapped 23 divergence points across three surfaces and set the direction: one system, predictable behavior, no silent edge-case failures.
Plans Lifecycle
5 lifecycle stages redesigned so each action was obvious at the right time.
Jairo Alvarez designs where
marketplaces,systems,constraints,platforms,trust,
product, and data meet.
I’ve spent 13 years on products where what the system does and what the user can understand are rarely the same thing. I speak engineering as well as I speak design, always in bilingual, cross functional teams (English and Spanish).
I’ve led design in marketplace (Mercado Libre, 100M+ users), banking (Davivienda), music streaming (Deezer), and advertising (McCann). More recently: a global telecom provider and SaaS platforms. Most of that work involved two-sided dynamics: sellers and buyers, creators and consumers, internal ops and end users. Six years at Deezer and McCann were spent producing visual assets at scale for artists and brands across Facebook, Instagram and Twitter, before generative AI existed. I know what that production pipeline looks like from the inside, which changes how I evaluate tools that try to automate it.
AI runs through most of my process now. Gemini for heuristic evaluations and competitive scans. Google Stitch for rapid wireframe generation. Claude for stress-testing flows, accessibility audits, and simulated research before anything reaches engineering. It compresses timelines and catches what tired eyes miss.
I’m comfortable starting from zero: new products, systems that span multiple surfaces, and the handoff details that keep a squad moving. Mixed methods research is part of every project. I think about both sides of the market, and I tend to be the one in the room aligning product, engineering, and marketing before something goes live.
What I defend in design reviews: every interaction state defined before handoff, no “happy path only” prototypes. I push back when product wants to ship without error states or when engineering proposes splitting a flow across platforms just because codebases are separate. I won’t negotiate on content hierarchy in transactional screens: if the user is about to pay, every piece of information that affects that decision must be visible without scrolling or tapping. I’d rather delay a launch than ship a screen that hides the cost.