Senior React Fullstack Developer

Diagonal is building the future of personalized software. Our team has deep experience in vertical SaaS, and we’re backed by leading investors to create a platform that reshapes how software adapts to its users.

The Role
We’re hiring a Senior React Engineer to lead the architecture of our dynamic application rendering systems. This isn’t typical frontend work—you’ll design the primitives, rendering pipelines, and interaction patterns that allow others to generate entire applications. If you enjoy complex systems, deep UI architecture, and building from first principles, you’ll thrive here.
You’ll have broad influence across the stack: designing a schema-driven UI engine, building a high-performance component runtime, and shaping how user-defined logic becomes real, working software. The work is highly technical and fast-moving, suited for people who want to stretch themselves and have meaningful impact.
We move quickly, but we value clarity, focus, and long-term thinking over chaos. We take pride in our craft and in understanding the nuance of the technologies we build on. We will expect a lot from you, and you can expect a lot from us.
In return, we offer strong compensation, real ownership, and the opportunity to help shape a platform we believe can power much of American business. If you’re motivated by challenges and want your work to count, you’ll feel at home here.

Requirements

• Based in the United States or Canada only
• 7+ years of professional experience building production-grade applications
• 4+ years professional experience with React and modern frontend ecosystems
• Deep understanding of frontend architecture, component systems, and application design patterns
• Experience building complex interactive systems (page builders, design tools, dashboards, editors, or schema-driven UIs are a plus)
• Strong full-stack engineering skills, ideally with Laravel/PHP or similar backends
• Skilled with database technologies (PostgreSQL, MongoDB)

Benefits
Base cash compensation $160,000 – $200,000 USD, depending on experience
Stock options 0.10% – 0.30%
Fully remote engineering team
US Only: Top-tier Health Insurance (Medical, Vision, Dental)
Top-of-line computers/equipment
Continued learning budget (conferences, courses, materials)
Paid parental leave