Frontend Engineer, AI Observability & Evals Platform

LangChain
San Francisco, New York, Boston, United States, Cambridge
Workplace: OnsiteFull timeUSD 160,000 - 195,000 annuallyFunction: Software EngineeringExperience: 2+ yearsEducation: bachelorsSkills: ["Communication","Ownership","User experience focus"]

Build and enhance user-facing features for the enterprise LangSmith platform, focusing on LLM application observability, testing, and debugging. Develop reusable React and TypeScript components and front-end libraries, translate designs into production-quality code, and optimize performance across browsers and devices. Work closely with UX/UI designers and fullstack/backend developers to improve usability and integrate with REST APIs and modern authorization.

Loading

Loading job details...

Preparing the role view and application actions.

FursaFursa
LangChain
LangChain
7 months ago

Frontend Engineer, AI Observability & Evals Platform

✓ Verified Job

Canonical indexed version, validated from employer's careers page.

Source: Company careers pageValidated by: Fursa AI
Last checked: 11 hours agoStatus: Live

Job Summary

Build and enhance user-facing features for the enterprise LangSmith platform, focusing on LLM application observability, testing, and debugging. Develop reusable React and TypeScript components and front-end libraries, translate designs into production-quality code, and optimize performance across browsers and devices. Work closely with UX/UI designers and fullstack/backend developers to improve usability and integrate with REST APIs and modern authorization.
Location: San Francisco, New York, Boston, United States, Cambridge
Workplace: Onsite
Employment Type: Full time
Job Function: Software Engineering
Seniority: Mid level

Key Responsibilities

  • •Develop new user-facing features for LangSmith 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 fullstack/backend developers and UX/UI designers to enhance usability.

Pay and Benefits

Salary: USD 160,000 - 195,000 annually
Equity and Bonus:Equity
Perks:Health InsuranceDentalVision401kMeal Allowance

Key Requirements

  • •2+ years of front-end engineering experience with strong proficiency in React, JavaScript, and TypeScript.
  • •Hands-on experience with front-end tools including 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.
  • •Strong computer science fundamentals, ideally with a degree in computer science or a related field.
Experience:2+ years
Education:Bachelor's in computer science
Skills:CommunicationOwnershipUser experience focus
Tech Stack:ReactTypeScriptJavaScriptBabelViteWebpackNPMYarnREST APIsJWT

Company Brief

LangChain
Provides an open-source framework and commercial platform (LangSmith/LangGraph) for building, testing, monitoring, and deploying LLM-powered applications and agentic AI for developers and enterprises.
Industry: Developer Tools
Company Size: Medium (51 to 250 employees)
Revenue: USD 10M to 25M
Growth: Scaleup
Valuation: Unicorn (USD 1B+)
Funding: Series B
Headquarters: San Francisco, United States
Founded: 2022
WebsiteLinkedIn