Sebastian David
UI/UX Designer & Motion — Bucharest, Romania

Sebastian David

I’ve worked in tech since 2013 — first in telecommunications, then in anti-money-laundering (AML) compliance. Now I’m making a deliberate transition into UI/UX design.

Years of untangling how complex systems really behave left me with a designer’s instinct for structure, edge cases, and what happens when things go wrong, not just the happy path.

CurrentlyOpen to UI/UX & Motion roles
CertificationUI/UX Designer, Pixellab School
01 / Work Selected work

Two projects, taken end to end.

Colab case study
01

Colab

Open interactive prototype

A mobile marketplace where creative projects actually get finished. Research, information architecture, user flows, branding, a full design system, and a high-fidelity prototype — done solo.

Mobile appEnd-to-end UX/UIDesign system
View case study
Next Step case study
02

Next Step

nextstepinfluencers.com

An influencer marketing agency site that speaks to two audiences — brands and creators — from one segmented page. Front-end UI/UX: identity, information architecture, responsive layout, components and motion.

Responsive webAgency siteBrand + Creator
View case study
02 / Motion Motion & explainers

Explaining products, end to end.

01

Website MOT — product explainer

A short-form explainer for Website MOT, a live website-inspection service — built to walk through the product end to end and hold attention from the first frame. I built the storyboard, then layered music and a voiceover on top, with every beat synced. Delivered in two formats, 16:9 and 9:16, for landscape and vertical placements.

After Effects Storyboard Voiceover & music 16:9 + 9:16
SaaS explainer
Promo hook
02

CrabTap — SaaS explainer & promo

A loyalty-card app for small local businesses. Two pieces: a SaaS explainer that walks through the product end to end, and a short promo hook built to stop the scroll on social.

After Effects SaaS explainer Promo hook 16:9
03

Watch Exchange — app flow explainer

An end-to-end app-flow explainer for Watch Exchange, a private trading network for professional watch dealers — a clear, deliberate walkthrough of the interface and navigation, from welcome screen through membership to account review.

After Effects App flow Storyboard 16:9
04

Colab — product walkthrough

The product explainer from the Colab case study — a walkthrough of the creative-collaboration marketplace, from posting a project to locking a collaboration with payments held safely in the app.

After Effects Product walkthrough Case study 16:9
View all motion work →
03 / Skills Skills & tools

What I work with.

I design and prototype in Figma, and bring interfaces to life with motion in After Effects. My background in tech gives me a systems-first approach to UX.

Design & UI

  • Prototyping
  • Figma
  • Design systems
  • Component libraries
  • Wireframing
  • Visual & interaction design
  • HTML, CSS & JS front-end basics

Motion & prototyping

  • After Effects motion
  • Micro-interactions
  • Prototyping
  • Adobe Illustrator

UX & research

  • User research
  • Personas & user flows
  • Information architecture
  • Benchmarking
  • Accessibility basics

From 10+ years in tech

Telecom and anti-money-laundering work gave me strengths that carry straight into product design.

Systems thinking Automation Python HTML, CSS & JS Data literacy (SQL) Working within technical constraints Requirements & documentation Problem diagnosis An eye for edge cases