Senior Frontend Platform Engineer (React/TS)

Doppel; New York (NY); On-site; USD 140,000 - 190,000; Full time

Benefits offered by this job

Free lunch and dinner in the office

Flexible PTO

Quarterly team offsites

Job summary

Doppel is seeking a senior frontend engineer to elevate UI/UX across our core platform. You’ll work with our lead designer to create a cohesive, performant experience for enterprise customers, influencing seven-figure deals and how teams interact with our product.

You’ll help build a frontend platform where design systems and infrastructure scale with a guarded, tokenized design language, and where AI-assisted development raises the abstraction level while keeping code safe and reviewable.

Qualifications

• 5+ years of software engineering experience with React and TypeScript.
• Experience owning platform-level frontend work: design systems, component libraries, build tooling.
• Genuine excitement about AI-assisted development and safe scaffolding for agents.
• Strong collaboration with designers, product teams, and backend platform engineers.

Responsibilities

• Build and maintain the frontend infrastructure and design system.
• Evolve the design system from a component library into a contract with tokens and docs.
• Create design-to-production pipeline: tooling, agent workflows, and guardrails.
• Make the platform safe by default: permissions, observability, and accessibility.
• Own production health of the shared client: monitors and SLOs.
• Package the platform for scale: versioned components and scaffolding.
• Partner with design and product teams to maximize velocity.

Skills

React

TypeScript

Frontend engineering

Design systems

Storybook

Relay

Tools

Storybook

Figma

Job description

Doppel is seeking a senior frontend engineer to elevate UI/UX across our core platform. You’ll work with our lead designer to create a cohesive, performant experience for enterprise customers, influencing seven-figure deals and how teams interact with our product.

You’ll help build a frontend platform where design systems and infrastructure scale with a guarded, tokenized design language, and where AI-assisted development raises the abstraction level while keeping code safe and reviewable.