Sebastian Zelonka

Front End Developer & UI Designer

As a frontend developer, I have a strong focus on UI, UX, and accessibility.

With over 14 years of industry experience, I'm a former designer who helps bridge the gap between designers and developers.

My areas of interest include design systems, JAMstack, DX/UX, and accessibility. Please feel free to review my resume.

Experience

SR Design System Engineer

Making Sense

Mar'24 — Current

Leading a team working on SeCO's Design System Library using Shadcn-UI Key responsibilities: - Define stack and technology to be used - Work close to designers on how to develop UI based on tokens - Develop custom styles to match designs - Develop custom React components - Storybook Stack: - Shadcn-UI - Remix - HTML - CSS - TS

SR Design System Engineer

Making Sense

Nov'22 — Feb '24

Leading a team working on Vetsource's Design System Library using React + SCSS https://storybook.vetsource.design/ Key responsibilities: - Define stack and technology to be used - Work close to designers on how to develop UI based on tokens - Develop SASS styles - Develop React components - Storybook - Publish package to be consumed by the company teams - Documentation Stack: - SASS - Vite React - HTML - CSS - TS

UX developer

Making Sense

Nov'21 — Nov'22

Working as a bridge between developers and designers to bring design to life. Architecture and implementation of design systems. Stack: - React - HTML - CSS - TS

FE Developer

ank

Sep '20 — Oct'21

This was the first experience working as a FE Developer. My main goal was to create and maintain shared components to be consumed by all the products inside the app. I also worked on QR payment flow from the very beginning, adding all the routes and creating the main layout of the app. Stack: - React Native - TypeScript - Apollo GraphQL - Node.js - Jest - HTML - CSS - TS

SR UX Designer

ank

May'20 — Sept'20

Worked with Product team to refine and iterate over user behaviour and flows inside the app.

Web Designer

increase

Feb'19 — Feb'20

Rapid prototyping using React & Styled-Components Creation and maintenance of design systems to be consumed by frontend team. Stack: - React + Styled components - React navigation - Storybook - Jest

UX/UI Designer

Freelance

Jan'08 — Feb'19

Research and develpment of websites and mobile apps, including User Research, Rapid Prototyping, Mockups, Visual Design and Front End development.

UX/UI Designer - FrontEnd Dev

Dexdex

Jun'18 — Oct'18

UI Design and implementation of platform sites (dexdex.io & easytrade.io). UX/UI Design Easytrade's widget.

UX/UI Designer

Onapsis

Aug'16 — Jun'18

I’ve been working on Product Definition and improvements of current flowsclose to the Product Management team. Also I worked supporting the FrontEnd team doing basic UI implementation,using HTML & CSS.

Product Designer

Wolox

Oct'15 — Aug'16

I’ve worked most of the time on MVP definition for startups that came to us to get helped on development of a new product. Some of those companies are Green Commuter and Syrmo. Also I worked supporting the FrontEnd team doing basic UI implementation,using HTML & CSS.

UX/UI Designer - FrontEnd Dev

Aquicore

Oct'13 — Mar'15

I’ve been working on research and definition of new functionallity, preparing and discussing mockups, HiRes mockups to define new UI and HTML + LESS implementation. On this company I’ve worked with a distributed team including people in San Francisco, Washington DC, Croatia and Russia.

UX/UI Designer - FrontEnd Dev

Zauber/Flowics

Aug'11 — Dec'13

I’ve been working on different kind of projects, doing HTML mockups, UI design for mobile apps, User Research and early development using HTML and CSS. Some of the projects I’ve been working are Tribatics and Flowics: UI Design, User Research. These projects have been developed on the Zauber’s labs.

Collaborator - Usability & Accesibility Course

UTN FRBA

Jan'12 — Dec'12

Administrative tasks, agenda consultant. My main tasks were to coordinate agendas, work close to speakers and teachers on day by day goals.

UX/UI Designer

GlobalLogic

Sep'10 — Aug'11

I’ve been working on different kind of projects B2B, B2C, Consumer Apps, including HTML mockups, UI design for iPad and CSS optimization for eCommerce platform. Projects I’ve been working: Intershop: CSS optimization and template redesigning for eCommerce platforms for Levis and others companies. CEB: UI Design and Information Architecture for the iPad application.

Disabled people Assistant

GCBA

Jul'99 — Aug'10

I’ve been working as an assistant of Disabled People at public schools for more than 10 years.

Web Designer

3nodos

Nov'07 — Feb'08

Internship. HTML, CSS, basic JS development. Flash animations, banners, media content production.

I worked with Sebastian and depended on him to provide UX designs and workflows to ensure proposed features would both work within the existing product UI and enhance the experience of our users. Sebastian always provided clear designs and typically provide alternate designs in order to present the best possible options.

Alex Horan • Director of Product Management, Onapsis

Education

Degree in Graphic Design — FADU - UBA

2003 — 2008


Bachelor’s Degree — Escuela Superior de Comercio N° 3 «Hipólito Vieytes»

1994 —1998


Experto Universitario en Accesibilidad y Usabilidad — UTN FRBA

12-2011 — 03-2011

Objectives

  • Develop new skills to include in the design, development and management of web and application projects.
  • Understand Web accessibility and best practices
  • usability criteria based on standards and best practices.

Metodologías para un diseño centrado en el usuario — Dr. Mariana Salgado

06-2010 — 07-2010

Organized by CIMO (Center for International Mobility)/ Aalto University, Finland-FADU- UBA

Objectives

  • Inform and raise awareness of the existence, importance and influence of incorporate users into design work and research design.
  • Investigate and analyze alternatives for user-centered design that incorporate these methodologies.
  • Motivate curiosity in researchers designers to incorporate new strategies and ideas.
  • Empowerment of new methods of documentation and teamwork that make research.

Taller de diseño interactivo — Coordinated by Enrique Stanziola

06-2010 — 07-2010

Objectives:

  • Inform and raise awareness of the existence, importance and influence of incorporate users into design work and research design.
  • Investigate and analyze alternatives for user-centered design that incorporate these methodologies.
  • Motivate curiosity in researchers designers to incorporate new strategies and ideas.
  • Empowerment of new methods of documentation and teamwork that make research.