Posted by employer 1 month ago
First seen on Joblaze 5 months ago
Last verified on the company career page 6 hours ago
Skills & Technologies
Requirements
- Education
- Bachelor's degree
Not disclosed in this posting: years of experience, visa sponsorship.
Benefits
Joblaze summary
In this role, the Senior Frontend Engineer at LangChain focuses on developing and enhancing user-facing features for the LangSmith platform, which supports LLM application observability and debugging. Proficiency in React, TypeScript, and modern front-end tools is essential, along with experience collaborating with backend developers and UX/UI designers. This position is ideal for someone with extensive front-end experience who thrives in a fast-paced startup environment and possesses strong communication skills. LangChain is in a growth phase, having recently secured significant funding, which allows for impactful contributions from all team members.
Joblaze insights
- Listed about 5 months ago — first seen on Joblaze April 14, 2026. Last confirmed on LangChain's careers page October 9, 2026.
- Salary band is in line with the typical range for Frontend roles (median ~$180,000).
- Starts above 38% of 39 comparable senior frontend roles in United States that list React we track (median $179,400 across 28 companies). See React salary trends
- React appears in 78.8% of 66 comparable senior frontend roles in United States; NPM appears in 1.5% of 66 comparable senior frontend roles in United States.
Quick facts
- Is the Senior Frontend Engineer, AI Observability & Evals Platform role remote?
- No — this is an on-site role in Remote - US.
- What's the salary range?
- LangChain lists $175,000–$225,000 for this role.
- Where is the role based?
- LangChain is hiring for this position in Remote - US.
- What's the tech stack?
- Joblaze extracted these technologies from the posting: Babel, JavaScript, NPM, React, TypeScript, Vite.
- What seniority level is this role?
- LangChain targets senior candidates for this position.
- Is this full-time or contract?
- Full-time for this Senior Frontend Engineer, AI Observability & Evals Platform role at LangChain.
From the original posting
About Us
About the role:
This position can be based remotely in
We’re looking to bring on an experienced frontend engineer to develop and enhance new features on LangSmith, our enterprise platform product for LLM application observability, testing, and debugging.
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
What You Will Bring
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. You view unstructured environments as an opportunity to make the most impactful work and to help define what's next.
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
Annual salary range: $180,000-$240,000 USD
Standard company text repeated across LangChain's postings is omitted here.