Senior Frontend Engineer (React/TypeScript)

Location: Flexible remote work from anywhere, or onsite in Belgrade or London offices.

Company

hirify.global is a fast-growing SaaS company helping mobile apps manage in-app purchases and paywalls, powering more than 20,000 apps and processing over $2 billion in annual subscriptions.

What you will do

• Take Flow Builder features from customer problems through product decisions, implementation, release, and post-release evaluation.
• Own the editor architecture, including module boundaries, the document model, reusable components, and performance as flows scale.
• Build editor capabilities across the canvas, layers, inspector, navigation, actions, variables, states, and conditional logic.
• Translate editor configuration into the SDK contract used by iOS, Android, React Native, Flutter, and Capacitor runtimes.
• Improve parity between browser previews and device rendering across layout, typography, media, dark mode, screen sizes, and orientations.
• Build undo and redo, autosave, drafts and published versions, concurrent editing, and reversible AI Editor workflows.

Requirements

• 5+ years of experience shipping production web applications with React and TypeScript.
• Experience building editor-class interfaces such as canvas tools, drag-and-drop systems, node or graph editors, WYSIWYG tools, design tools, or page builders.
• Product thinking with the ability to connect features to customer problems and measurable outcomes.
• Experience owning architecture for a growing product and defining clear system boundaries.
• Strong understanding of complex client state, including normalized models, immutability, undo and redo, optimistic updates, and versioning.
• Ability to own rendering and performance end to end, including browser layout, precise reproduction, and profiling.

Culture & Benefits

• Direct communication, broad ownership, and limited bureaucracy.
• Flexible remote work or onsite work from Belgrade or London.
• Language learning and professional support.
• Sports benefits, health insurance, and laptop coverage.
• Performance-linked compensation.