Senior Frontend Engineer, AI Observability & Evals Platform
Develops and enhances user-facing features for LangSmith, an AI observability platform using React and TypeScript. Requires extensive frontend experience, build tools proficiency, API integration, and strong collaboration skills in a fast-paced startup.
About the job
What You Will Do
- Develop new user-facing features using React & Typescript
- Build reusable components and front-end libraries for future use
- Translate designs and wireframes into high-quality code
- Optimize components for maximum performance across a vast array of web-capable devices and browsers
- Collaborate with fullstack and backend developers and UX/UI designers, to enhance usability
You’re a good fit if you have
- Extensive front-end engineering experience with strong proficiency in React, JavaScript and TypeScript
- Hands-on experience with front-end development tools like Babel, Vite, Webpack, NPM, and Yarn
- Familiarity with REST APIs and experience working closely with fullstack and backend engineers
- Knowledge of modern authorization mechanisms, such as JWTs
- A passion for user experience, design and building clean, engaging, and intuitive interfaces
- Strong written and oral communication skills, with the ability to explain technical concepts clearly and concisely to both technical and non-technical stakeholders
- The DNA to thrive in a start-up, fast-paced environment. Views unstructured environments as an opportunity to figure out the most impactful work and help define the future success of the company
- An ownership mind-set. You are self-driven and look for opportunities to make an impact.
- Strong computer science fundamentals, ideally with a degree in computer science or related field
Compensation & Benefits
- Annual salary range: $175,000-$225,000 USD
- Competitive compensation that includes base salary, meaningful equity, and benefits such as health and dental coverage, flexible vacation, a 401(k) plan, and life insurance.
Skills
React, TypeScript, JavaScript, Babel, Vite, webpack, Npm, Yarn, REST APIs, Jwt
Similar jobs
Frontend Engineering jobs
Tabs
New York, NY
The Senior Software Engineer will build and scale frontend platform infrastructure, including a design system and reusable component library, while collaborating with engineering teams to improve developer and user experiences. The role requires 5–8 years of professional engineering experience and strong TypeScript or JavaScript skills.
LangChain
San Francisco, CABuild and evolve LangChain’s reusable React component library and the tooling that supports accessible, consistent, high-quality interfaces across its products. The role requires strong React and TypeScript expertise, design-systems experience, and close collaboration with designers.
Atomicmachines
Emeryville, CABuild and maintain complex React and TypeScript interfaces for manufacturing, engineering, and AI/ML workflows. The role requires experience with stateful interaction-heavy applications, data validation, debugging, and cross-functional collaboration in technically complex environments.
Beacon AI
San Carlos, CA
Leads development of React-based web applications for complex real-time and historical aviation data, while mentoring engineers and setting frontend architecture and quality standards. Requires 5+ years of experience with React, TypeScript, JavaScript, state management, and performance optimization.
Clickhouse
United States
Build customer-facing frontend experiences for growth, including onboarding flows, experiments, upgrade funnels, and activation infrastructure. The role requires 6+ years of experience, strong React and TypeScript skills, and a product-oriented UX sensibility.