Backend Engineer (Product Growth)

WHY WORK AT HIGGSFIELD AI? 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. Who we are looking for Everyone at Higgsfield is an A-player. We’re looking for teammates who bring: - 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. What you will work on - 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. Your must haves - 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. THE DEAL - 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.