UI Engineer | Frontend Developer

Antithesis•Vienna, VA

7d•Onsite

About The Position

Antithesis is looking for an in-office employee to help improve and maintain our marketing, documentation and product websites / webapps. As a UI Engineer, you will work closely with the Product Design Director to deliver features requested by the marketing department, documentation creators and product users.

Requirements

Experience implementing design mocks in HTML, CSS, and JavaScript
Experience building static websites
Understanding of how the internet and browsers work
At least 4 years of experience improving and maintaining websites
Great attention to detail
A portfolio website or a list of links to projects you’ve worked on

Nice To Haves

Experience with different build tools
Experience with testing libraries like Playwright
Experience building SPAs with a frontend framework (React, Vue, Svelte, Solid, etc.)
Experience in back-end development (Node.js, Python, PHP, etc.)
Experience with Terraform
Experience creating and shipping a software package (e.g., an npm library)
Experience optimizing web pages for performance
Search engine optimization (SEO) experience
Advanced CSS/JS skills (e.g., 3D, WebGL, visual effects)
Experience creating, scaling, and supporting design systems

Responsibilities

Get up to speed with the Antithesis marketing and documentation websites by making small improvements and fixing bugs.
Implement a block on the marketing website based on provided Figma designs.
Build a new feature for the documentation website.
Take a full Figma mock and implement an entire marketing webpage, adding subtle and engaging effects.
Develop a small interactive game for the marketing website to drive engagement.
Refactor the websites to support a light theme option.
Update the footer and header across marketing and documentation sites to match the new design.
Configure a website analytics dashboard (PostHog) to answer key marketing questions.
Develop a custom forms component to replace third‑party form widgets, ensuring consistent design and flexibility.
Implement a new component for the product design system
Build a new multi-page website section
Develop an interactive tutorial to illustrate key Antithesis concepts
Learn, apply, and improve testing for the marketing and documentation websites
Refine and enhance marketing automations
Implement a new product view based on provided mocks and product brief