Growth Tools Senior Frontend Engineer

We’re hiring a Senior Frontend Engineer to own the frontend of Flow Builder and help shape what it becomes. You’d set architectural direction rather than pick up specced tickets, work with the SDK team on the config contract, and take features from a customer problem to production.

• Take features from a customer problem to production: decide with product and design what to build, defend the call, ship it, and check what changed after release.
• Own the architecture of the editor and move it forward as the product grows: module boundaries, the shape of the document model, where reusable components live, and keeping the editor fast when a flow grows from four screens to hundreds of branches.
• Ship across the editor surface: canvas and layers, element inspector, selectable groups and states, navigation, actions, variables, and conditional logic.
• Own the layer that translates the editor config into what the SDKs execute on device. It’s a contract with five runtimes, and you’ll negotiate it with the mobile team.
• Close the gap between browser preview and device rendering across layout, typography, media, dark mode, screen sizes, and orientations.
• Build the document model underneath all of it: nested configs, undo and redo, autosave, drafts versus published versions, and concurrent editing.
• Build the product around the AI Editor so a generated screen is as inspectable and reversible as a hand-built one: prompt history, per-prompt undo, and a clear view of what changed.

• 5+ years shipping production web applications in React and TypeScript.

• You’ve built editor-class interfaces: canvas, drag and drop, node or graph editors, WYSIWYG, design tools, page builders. Something with a document underneath, not forms over a database.
• You think in product terms. You can say what problem your last feature solved, who had it, and what changed after you shipped it.
• You’ve owned architecture on a product that kept growing. You can explain the boundaries you drew, and what you’d draw differently now.
• You’re at home in complex client state: normalized models, immutability, undo and redo, optimistic updates, versioning.
• You can own rendering and performance end to end: box model, flex, absolute positioning, reproducing a target exactly rather than approximately, and profiling before you optimize.
• You go after requirements and contracts yourself, and you say it out loud when something is wrong.

• 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.