Senior Frontend Developer (Adapty)

Flyer One Ventures

7d • Remote

About The Position

Join the future of mobile in-app subscriptions. Help thousands of app developers across the world better monetize their apps and build successful app business. We are looking for a Senior Frontend Developer at Adapty. At Adapty, we make it easy for mobile apps to manage in-app purchases and paywalls. We power 20K+ apps, process $2B+ in subscriptions every year, and have been growing fast for the last four years. Our mission is simple: help every app unlock its full revenue potential. We are a team of 230+ passionate, product-driven people who love solving big challenges. Backed by top investors like 500 Startups and Surface Ventures, we are building one of mobile's fastest-growing SaaS companies and aiming for number one worldwide. Our Growth Tools team builds complex, data-intensive dashboards for mobile apps – paywalls, A/B experiments, analytics workflows, large tables, interactive charts, and advanced filtering. We continuously evolve our frontend architecture, optimize performance at scale, and collaborate closely with backend and design teams. We're looking for a Frontend Developer to join us and help take these systems to the next level – making them faster, more modular, and even more powerful for thousands of apps worldwide.

Requirements

• 5+ years of experience building production web applications with React and TypeScript.
• Strong component architecture skills and proven ability to create reusable UI for complex products.
• Deep experience developing data-intensive UIs with modern state management and data libraries in the React ecosystem.
• Track record of profiling and optimizing performance in large-scale applications.
• Excellent communication skills and a strong sense of ownership.

Nice To Haves

• Experience migrating legacy codebases to modular architectures (e.g., feature-sliced or similar).
• Strong background in data visualization and UX for analytical products.
• Contributions to design systems or internal UI libraries.

Responsibilities

• Design and ship end-to-end features in the dashboard, including paywall configuration, A/B experimentation, and analytics workflows.
• Build complex, data-heavy UIs: large tables with advanced filtering, column management, presets, interactive charts, and time-series comparisons.
• Evolve the frontend architecture toward clear modular boundaries and reusable UI components, while steadily modernizing legacy parts of the codebase.
• Optimize performance and reliability at scale using virtualization, code-splitting, optimized loading states, and consistent client-side data handling.
• Collaborate closely with design and backend teams to define API contracts, shape product requirements, and deliver high-quality UX that supports actionable decision-making.

Benefits

• Strong product with industry-best metrics.
• Adapty is among the top 5 fastest-growing SaaS companies.
• Exceptional compensation directly tied to your results.
• Direct communication and ownership. No bureaucracy, no politics, just impact.
• Flexible remote work. Join us from anywhere or work onsite in our Belgrade or London offices.
• Professional support: language learning, sports, health insurance, laptop coverage, and more.

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Education Level: No Education Listed