Senior Frontend Engineer - AI-Driven Retention UI

Thesirius; San Francisco, Northern (CA, KY); Hybrid; USD 100,000 - 150,000; Full time

Benefits offered by this job

In-person, in SF

Flexible healthcare

Ownership of what you build

Lunch, coffee & snacks

Time off

Company events

Job summary

Thesirius in San Francisco is seeking a Frontend Engineer to design, develop, and maintain user-facing components of our core products. You will collaborate with backend, product, and design teams to deliver high-quality integrated solutions.

You will drive adoption of modern frontend technologies, tackle performance and UX challenges, and contribute to a culture of engineering excellence. This is an in-person, on-site role in San Francisco with visa sponsorship not available.

Qualifications

• 1+ year of frontend development experience for production apps.
• Strong proficiency in JavaScript/TypeScript and modern frontend frameworks.
• Experience integrating frontend apps with backend APIs and third-party services.
• Solid understanding of UI/UX, performance, and frontend architecture.
• Ability to drive projects to completion independently.
• Based in San Francisco or able to relocate/be onsite full-time. Visa sponsorship not offered.

Responsibilities

• Architect and build robust, scalable, user-friendly interfaces.
• Collaborate with backend engineers, product, and design teams to deliver integrated solutions.
• Drive adoption of modern frontend technologies and practices.
• Identify and resolve performance, UX, and security challenges.
• Contribute to a culture of continuous improvement and engineering excellence.

Skills

Frontend development

JavaScript/TypeScript

Frontend frameworks

APIs integration

UI/UX

Project ownership

Job description

Thesirius in San Francisco is seeking a Frontend Engineer to design, develop, and maintain user-facing components of our core products. You will collaborate with backend, product, and design teams to deliver high-quality integrated solutions.

You will drive adoption of modern frontend technologies, tackle performance and UX challenges, and contribute to a culture of engineering excellence. This is an in-person, on-site role in San Francisco with visa sponsorship not available.