Backend Engineer
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 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 Backend Engineer, you will play a central role in building and maintaining the critical backend infrastructure that powers our products. In this position, you will:
Contribute to designing scalable architectures that support new product features and business requirements.
Drive the development, deployment, and optimization of backend services, ensuring performance, reliability, and maintainability.
Collaborate with cross-functional teams to integrate third-party platforms, APIs, and emerging AI technologies.
Lead technical discussions, offering best practices, mentorship, and guidance to team members.
Take an active part in the continuous improvement of our engineering standards and development processes.
Proactively identify and resolve complex technical challenges to ensure stable, secure operations.
What You'll Bring:
+1 years of professional experience in backend development, with a track record of delivering reliable and scalable systems.
Advanced proficiency in server-side programming and experience designing database-driven applications.
Strong grasp of API development, systems integration, and best practices in software engineering.
Experience building and maintaining environments that scale to serve real users in production.
An independent and proactive approach to problem-solving, with the ability to drive projects forward.
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.