Senior Software Engineer I, Frontend Infrastructure & Experience

The team makes it easy for engineers across Braze to build polished, accessible, and consistent UIs. FIX owns our design system and component library, internationalization stack, code generation and scaffolding tooling, and the navigation and routing layer of the product. The team also owns key customer-facing experiences including our data tables and our rich text, drag-and-drop, and code editors.

As a Senior Engineer on FIX, you will build high-impact frontend infrastructure and product experiences used across Braze. You will lead important projects from design through rollout, raise the quality bar through technical judgment and code review, and help other engineers move faster by making the product easier to build, test, and maintain.

In this role you will:
Design and build foundational frontend systems, components, tools, and patterns used by engineers across Braze
Lead large projects end-to-end, including technical design, implementation, testing, rollout, and operational follow-through
Improve the developer experience of working in a large TypeScript and React codebase through better abstractions, tooling, documentation, and examples
Build customer-facing product experiences that are polished, accessible, performant, and consistent with Braze’s product standards
Partner with product engineers, designers, and infrastructure teams to solve cross-cutting frontend problems
Mentor other engineers through code review, pairing, technical guidance, and clear communication
Recent and ongoing work on the team includes:

Developing the framework used to build our marketing message editors
Migrating the navigation and routing layer to a fully React-based system
Extending the design system with semantic tokens and supporting a product rebrand
Building type-safe scaffolding and API tooling for frontend development
Improving frontend testing infrastructure with Cypress, Jest, and related tooling
Advancing accessibility, localization, and consistency across product experiences
Parts of our stack with which you will work:

TypeScript, React
Cypress, Jest, RSpec
Frontend build, packaging, and code generation tooling
Ruby on Rails

WHO YOU ARE

Have 5+ years of software engineering experience with a strong track record of technical impact
Are highly skilled in modern frontend development, especially TypeScript and React
Have experience building reusable frontend systems, components, tools, or infrastructure
Care deeply about user experience, accessibility, performance, and maintainability
Are comfortable working in a large frontend codebase with many stakeholders
Communicate clearly, collaborate well across teams, and help raise the technical bar for those around you

Bonus experience

Experience building design systems or component libraries
Experience with frontend testing frameworks such as Cypress or Jest
Experience with code generation, linting, codemods, or other developer tooling
Experience with internationalization, localization, or accessibility
Experience with Ruby on Rails