Frontend Engineer
Frontend Engineer at SIRIUS — San Francisco, CA, US
- Company: SIRIUS
- Location: San Francisco, CA, US
- Employment type: Full-time
- Salary: $120,000–$180,000 a year
- Posted: 2026-06-09
About this role
ABOUT US:
We're on a mission to make subscriber churn a solved problem. Backed by a16z Speedrun, we build AI agents that help consumer subscription brands — like Higgsfield and Promova — retain more users, extend lifetime value, and grow fast. We're an incredibly driven team working on a problem that affects every consumer on the planet. If that sounds like your kind of thing, we'd love to meet you.
Our co-founders are Azamat Khamidov https://www.linkedin.com/in/theazamat/ and Benazir Toleubekova https://www.linkedin.com/in/benazirts/. Azamat built a Telegram AI product from zero to five million users in four months, the first acquisition inside Telegram. Benazir received a full scholarship to Beijing University of Technology at 15. Joined Taobao at 17. At Alibaba, architected the core recommendation engine serving 500M daily users.
WHAT YOU'LL DO:
As a Frontend Engineer, you will play a key role in designing, developing, and maintaining the user-facing components of our core products. Your responsibilities will include:
- Architecting and building robust, scalable, and user-friendly interfaces to support new product features and evolving business needs.
- Collaborating effectively with backend engineering, product, and design teams to deliver high-quality integrated solutions.
- Driving the adoption of modern frontend technologies, frameworks, and methodologies to ensure product quality and maintainability.
- Identifying and resolving complex technical challenges related to user experience, performance, and security.
- Contributing to a culture of continuous improvement and operational excellence within the engineering team.
WHAT YOU'LL BRING:
- +1 year of professional experience in frontend development for production-level applications.
- Advanced proficiency in JavaScript/TypeScript and modern frontend frameworks
- Demonstrated experience integrating frontend applications with backend APIs and third-party platforms.
- Solid understanding of UI/UX principles, performance optimization, and frontend architecture.
- Strong analytical skills and the ability to independently drive projects to completion.
- Based in San Francisco or able to be here full-time. We're not offering visa sponsorship at this time.
OUR VALUES:
Stewardship: We build for the long term. Every customer, partner, and teammate gets that same commitment from day one.
Trust: Earned through the integrity of our technology, the consistency of our commitments, and the honesty of our communication.
Customer Obsession: We win when our customers win. Every choice and conversation orbits around what makes them stronger.
Excellence: The same standard for the product we ship, the service we give, and the team we build. The bar is the bar.
Family: A constellation, not a single star. We back each other on hard days, celebrate the great ones, and protect the time teammates need to be parents, partners, and humans first.
LIFE AT SIRIUS:
In-person, in San Francisco: We work side by side, on-site in San Francisco. Proximity helps us move faster, solve harder problems, and build something we're proud of together. Note: we're not able to offer visa sponsorship at this time.
Flexible healthcare: We offer flexible spending to direct your benefits toward what matters most to you and your family.
Own what you build: We're building something real, and we want you to own it.
Lunch, coffee & snacks: Daily lunch, plus coffee, tea, and snacks to keep you going.
Time off that's actually off: Take the time you need to show up as your best self. We mean it.
Company Events: Take the time you need to show up as your best self. We mean it.
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