Senior · Staff · Principal Frontend Engineer
- Level
- Principal
- Work type
- On-site · San Francisco
Not stated in the posting: salary, visa.
Open. First seen 3 October 2026.
About the role
Senior / Staff / Principal Frontend Engineer
Location: Onsite San Francisco
We have multiple startups interested in talent. Here is a generic summary. Instead of a perfect job description, we present talented individuals to companies and allow them to share how that talent fits in the organization.
A Front-End Developer is responsible for building the user-facing parts of websites and web applications, ensuring a seamless and visually appealing user experience. They translate designs into functional code using HTML, CSS, and JavaScript, and may also utilize frameworks and libraries.
Key Responsibilities:
- Develop and implement user interfaces:
Front-end developers create the visual elements of websites and applications that users see and interact with.
- Translate designs into code:
They take design mockups and wireframes and translate them into functional code using HTML, CSS, and JavaScript.
- Build interactive elements:
They create interactive features and animations to enhance the user experience.
- Ensure cross-browser compatibility:
They make sure the website or application functions correctly across different web browsers and devices.
- Optimize page load times:
They optimize code for speed and efficiency, ensuring a fast and smooth user experience.
- Collaborate with back-end developers:
They work closely with back-end developers to integrate the front-end with server-side logic and databases.
- Maintain and update existing websites and applications:
They may be responsible for fixing bugs, implementing new features, and maintaining existing code.
- Follow industry best practices:
They stay up-to-date on the latest front-end technologies and best practices.
- Test and debug code:
They thoroughly test their code to ensure it functions as expected and debug any issues that arise.
Key Skills:
- HTML, CSS, and JavaScript: Proficiency in these foundational web development languages is essential.
- Front-end frameworks and libraries: Knowledge of frameworks like React, Angular, or Vue.js is often required.
- Responsive design: Ability to create websites and applications that adapt to different screen sizes and devices.
- Version control systems (Git): Familiarity with version control systems like Git is crucial for collaborative development.
- Accessibility: Understanding of accessibility principles and how to make websites usable for people with disabilities.
- Problem-solving and debugging skills: Ability to identify and resolve issues in the code.
- Testing and debugging: Ability to test and debug code to ensure it functions correctly.
Compensation: Market range and can include equity – details can be provided after the specific client is determined.
What this role asks for
Standard for frontend roles
CSS · HTML · JavaScript · React
Common in frontend postings at any company.
Compared with Lead Allies's other open jobs.
The team: Engineering
This role is one of 9 open in Engineering.
WHAT THE TEAM WORKS WITH, ACROSS ITS POSTINGS
Angular (4 of 9), CSS (4 of 9), Git (4 of 9), HTML (4 of 9), JavaScript (4 of 9), Python (4 of 9), React (4 of 9)
OTHER ROLES ON THIS TEAM
- Senior · Staff · Principal Fullstack Engineer posted Aug 4
- Senior · Staff · Principal Machine Learning Engineer posted Jul 23
- Product Engineer posted Jun 18
- Senior · Staff · Principal Machine Learning Engineer posted Jun 18
- Senior · Staff · Principal Fullstack Engineer posted Jun 11
- Senior · Staff · Principal Backend Engineer posted May 21
- Senior · Staff · Principal Frontend Engineer posted May 12
- Senior · Staff · Principal Backend Engineer posted May 8
From the team and dates on Lead Allies's own job board.
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