Senior Frontend Engineer

About Us:

• We are a fast-growing, a16z Speedrun-backed company dedicated to accelerating the success of leading consumer brands such as Higgsfield and Promova. Our dynamic team operates at the intersection of technology and business innovation, and we are looking for experienced and driven professionals to join us as we scale.

• We’re early, based in San Francisco, and we move with intention. We believe in full lives outside of work and focused intensity during it. We’re not 9–9–6, we care deeply about the work, and it shows in how we build.

• Our co-founders are Azamat Khamidov and Benazir Toleubekova. 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 Senior 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.

• Providing technical leadership by sharing best practices, mentoring team members, and actively participating in code reviews.

• 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:

• Minimum of 5 years 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.

• Full-time availability and a strong desire to contribute to an ambitious, high-growth environment.

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.