# Frontend Engineer, AI Observability & Evals Platform 

**Company:** [LangChain](https://hotfix.jobs/companies/langchain)
**Location:** San Francisco, CA, Boston, MA, New York, NY
**Role:** Frontend Engineering
**Salary:** $160k – $195k/yr
**Experience:** 2+ years
**Skills:** React, TypeScript, JavaScript, Babel, Vite, webpack, Npm, Yarn, REST APIs, Jwt, Ux/Ui, Frontend Libraries
**Posted:** 2026-08-12

> Develops user-facing features for an enterprise LLM observability, testing, and debugging platform. The role requires 2+ years of frontend engineering experience and strong React, JavaScript, and TypeScript proficiency.

## Job Description

## Responsibilities
- Develop new user-facing features using **React** and **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 web-capable devices and browsers.
- Collaborate with full-stack and back-end developers and UX/UI designers to enhance usability.

## Requirements
- 2+ years of front-end engineering experience.
- Strong proficiency in **React**, **JavaScript**, and **TypeScript**.
- Hands-on experience with front-end development tools including **Babel**, **Vite**, **Webpack**, **npm**, and **Yarn**.
- Familiarity with **REST APIs** and experience working closely with full-stack and back-end engineers.
- Knowledge of modern authorization mechanisms, such as **JWTs**.
- Passion for user experience, design, and building clean, engaging, intuitive interfaces.
- Strong written and oral communication skills, with the ability to explain technical concepts clearly to technical and non-technical stakeholders.
- Ability to thrive in a fast-paced startup environment and work effectively in unstructured settings.
- Ownership mindset and self-direction.
- Strong computer science fundamentals; a degree in computer science or a related field is preferred.

## Compensation
- Annual salary range: **$160,000–$195,000 USD**.
- Compensation may include base salary, variable compensation where relevant, meaningful equity, benefits, and perks.

## Benefits
- Medical, dental, and vision coverage.
- Flexible vacation.
- 401(k) plan.
- Meals on in-office days in the US.

## Similar jobs

- [Frontend Engineer](https://hotfix.jobs/jobs/826d106e-2dd3-48c6-8cc6-ec3ff72da14b) - Greptile - San Francisco, CA - $160k – $350k/yr
- [Frontend Software Engineer](https://hotfix.jobs/jobs/2f34bea0-3d67-4b7d-8b76-23cf9d6fc389) - David AI - San Francisco, CA - $165k – $225k/yr
- [Design Engineer](https://hotfix.jobs/jobs/699d4afe-54a6-47f1-8a5f-44ae12b77f95) - CodeRabbit - San Francisco, CA - $175k – $225k/yr
- [Software Engineer, Frontend/Web App](https://hotfix.jobs/jobs/df680ff7-e0f3-4f93-abc5-e7b46e0ed7f0) - Beacon AI - San Carlos, CA - $135k – $190k/yr
- [Associate, Software Engineer](https://hotfix.jobs/jobs/5afccab1-64de-46c5-8c4b-256a49f592b6) - Vestwell - Austin, TX - $95k – $110k/yr

**Apply:** https://hotfix.jobs/jobs/ada7c0f9-6ccd-4b40-a095-160d3ef62b67
**Canonical:** https://hotfix.jobs/jobs/ada7c0f9-6ccd-4b40-a095-160d3ef62b67