Frontend Engineer

Doppel•New York, NY

About The Position

Doppel is built to outsmart one of the great threats AI presents: mass-manufactured social engineering. Countless scams, deepfakes, and other social engineering attacks are surging across every digital channel: websites, social media, ads, encrypted messaging apps, mobile, and more. Our mission is simple but bold: make the internet a safer place by outsmarting the world’s fastest-evolving digital threats. Backed by a16z and Bessemer and trusted by some of the world’s most recognized brands (OpenAI, United Airlines, Coinbase, etc.), Doppel is growing fast. If you’re driven to solve real-world problems with bold technology, we’d love to meet you. We're building the AI-native social engineering defense platform. This means we're designing scalable systems that monitor billions of domains, social media accounts, apps, dark web forums, etc., and leverage AI agents to identify and neutralize digital threats. We’re looking for a senior frontend engineer to elevate every aspect of UI/UX across our core product platform. You’ll work closely with our lead designer to create a cohesive, performant, and modern user experience that instills confidence and trust in enterprise customers. Your work will directly influence seven-figure deals and how customers and internal teams interact with our product. You’ll define how our users, customers and internal teams, experience Doppel’s core platform. Your work will directly shape the look, feel, and velocity of the company’s most visible product surface. Doppel is the first platform built to dismantle digital deception at scale. We scan over 150 million entities daily and deploy continuously adaptive AI SOC agents, paired with expert human analysts, to uncover and disrupt the infrastructure behind phishing, impersonation, and online fraud before attacks can spread. Our Threat Grid turns every customer signal into shared intelligence, making each disruption smarter, faster, and more effective. We’re not just another cybersecurity company. We’re defining the future of social engineering defense, where trust is protected, and deception becomes unprofitable. Backed by top-tier investors and trusted by some of the world’s most recognized brands, Doppel is growing fast. If you’re driven to solve real-world problems with bold technology, we’d love to meet you.

Requirements

5+ years of professional frontend experience, with deep expertise in React, TypeScript, and modern UI frameworks.
Proven ability to partner with design teams to translate complex workflows into elegant interfaces.
Experience building design systems and scalable component libraries.
Strong grasp of performance optimization, accessibility, and web security principles.
Familiarity with analytics instrumentation (e.g., Segment, PostHog, Amplitude) and A/B testing.
Comfortable in a fast-moving environment where design and engineering intersect with product growth.

Responsibilities

Build a unified, componentized design system that enables rapid development and consistent visuals across the web app.
Partner with design and product to refine UX for our most customer-facing surfaces: Core Web Application
Stats/Dashboards and Onboarding experiences
Table and Detail views handling complex data interactions such as versioning.
Modernize UI performance and responsiveness with a focus on speed, accessibility, and reliability.
Introduce a modern cybersecurity-inspired aesthetic that communicates safety, precision, and sophistication.
Integrate and scale product analytics and click tracking across the app to enable data-driven product decisions.
Contribute to and shape frontend architecture standards, ensuring reusability, testability, and maintainability.