Senior Frontend Engineer, Flow Builder - Remote

Adapty.io; Greater London; On-site; GBP 90,000 - 120,000; Full time

Benefits offered by this job

Flexible remote work

Office options: London & Belgrade

Health insurance

Job summary

Adapty is hiring a Senior Frontend Engineer to own the frontend of Flow Builder, shaping its architecture and guiding features from customer problems to production. You will collaborate with the SDK team, ensure fast editor performance, and drive the product forward with minimal gaps between browser and device rendering.

The role requires strong React and TypeScript experience, editor-class interface skills, and a product-focused mindset.

Qualifications

• 5+ years shipping production web applications using React and TypeScript.
• Experience building editor-class interfaces (canvas, drag and drop, node/graph editors, WYSIWYG).
• Proven ability to own architecture in a growing product.
• Strong understanding of rendering and performance end-to-end.

Responsibilities

• Take features from a customer problem to production: define, defend, ship, verify changes after release.
• Own the architecture of the editor and its growth as the product expands.
• Ship across the editor surface: canvas, layers, inspector, navigation, actions, variables, and conditional logic.
• Own the translation layer from editor config to SDK runtimes.
• Close the gap between browser preview and device rendering across layout and typography.
• Build the document model with nested configs, undo/redo, autosave, drafts vs published.
• Develop AI Editor integration so generated screens are inspectable and reversible.

Skills

React

TypeScript

Frontend architecture

Performance optimization

Editor tools

Tools

Canvas editor

Node/graph editors

Design tools

Job description

Adapty is hiring a Senior Frontend Engineer to own the frontend of Flow Builder, shaping its architecture and guiding features from customer problems to production. You will collaborate with the SDK team, ensure fast editor performance, and drive the product forward with minimal gaps between browser and device rendering.

The role requires strong React and TypeScript experience, editor-class interface skills, and a product-focused mindset.