Frontend Engineer

BITKRAFT Ventures; San Francisco (CA); On-site; USD 120,000 - 180,000; Full time

Benefits offered by this job

In-person SF

Flexible healthcare

Ownership of work

Lunch & snacks

Time off

Company events

Job summary

Sirius is hiring a Frontend Engineer in San Francisco to design, develop, and maintain user-facing components of core products. You will work with backend, product, and design teams to deliver high-quality interfaces and drive frontend technology adoption.

Ideal candidates have 1+ year of production frontend experience, strong JavaScript/TypeScript skills, and a solid understanding of UI/UX and performance. This is an on-site role in SF with visa sponsorship not offered.

Qualifications

• 1+ year of frontend production experience.
• Advanced JavaScript/TypeScript with modern frontend frameworks.
• Experience wiring frontend apps to backend APIs.
• Solid UI/UX, performance, and frontend architecture knowledge.
• Strong analytical mindset and self-driven project delivery.
• Based in San Francisco and able to work full-time; visa sponsorship not offered.

Responsibilities

• Architect and build robust, scalable, user-friendly interfaces.
• Collaborate with backend, product, and design teams to deliver integrated solutions.
• Adopt modern frontend technologies to ensure quality and maintainability.
• Identify and resolve UX, performance, and security challenges.
• Contribute to engineering culture of continuous improvement.

Skills

Frontend development

JavaScript

TypeScript

Frontend frameworks

Backend API integration

UI/UX principles

Analytical skills

SF availability

Job description

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 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.

Compensation Range: $120K - $180K