Backend engineer for product growth

Higgsfield AI is the fastest-scaling generative AI company in history, hitting $1B in annual revenue run rate, 30M+ users worldwide, 6M+ generations per day, and powering 390 of Fortune 500 brands. We're building at the absolute frontier of AI-powered video creation and next-generation creative tools. Joining Higgsfield means becoming part of a high-impact team shaping the future of AI-native experiences, at a company that isn't just moving fast, but rewriting what fast looks like.

• Build the revenue-critical parts of Higgsfield products: paywalls, pricing pages, checkout and subscription flows used by millions of people.
• Develop onboarding, upsell and in-product communication that drive conversion and retention.
• Design and implement complex UI state logic across plans, limits, trials and payment states, where small mistakes are costly.
• Run A/B tests and PLG experiments quickly, and work closely with analysts to turn data into product decisions.
• Keep the interface fast and responsive, because every millisecond in the purchase flow affects conversion.
• Ensure product quality through unit, integration and end-to-end tests for key payment and onboarding scenarios.

• A strong product sense and an understanding of how interface decisions affect conversion, retention and revenue.
• The ability to design clear user states and in-product communication, not just build screens.
• Broad context over narrow specialization: comfort working across product verticals and monetization mechanics.
• Resilience and focus in a high-intensity startup environment, where priorities shift fast and the schedule isn’t always predictable.
• Experience building complex software and teaming up with others to get it done.
• Strong communication, collaboration and commitment to completing projects.
• Experience with payment integrations, checkout or subscription flows.
• Experience with A/B testing, feature flags and product analytics.
• Knowledge of CI/CD, bundlers, profiling and performance optimization.
• Ability to get up to speed on new context quickly and take full ownership of a task.
• Willingness to work in a fast-paced startup environment.

• Competitive salary in USD + stock options.
• On-site role in our Almaty office (we will relocate you from anywhere)
• Full-time position with high growth potential.