Senior Frontend Engineer — Build AI Observability at Scale

Showcify, Inc.; Boston (MA); On-site; USD 170,000 - 235,000; Full time

Benefits offered by this job

Medical, dental, and vision coverage

401(k) plan

In-office meals in the US

Flexible vacation

Job summary

LangChain is seeking an experienced frontend engineer to develop and enhance features on LangSmith, our enterprise platform for observability, evaluation, and production reliability of AI systems. This role is onsite in Boston and collaborates with product, design, and backend teams.

You will build user-facing features with React and TypeScript, create reusable components, translate designs into code, and optimize performance across devices and browsers while maintaining a strong focus on UX and

Qualifications

• Front-end development experience with React, JavaScript, and TypeScript.
• Experience with Babel, Vite, Webpack, NPM, and Yarn.
• Familiarity with REST APIs and collaborating with backend engineers.
• Knowledge of JWTs for authorization.
• Strong UX focus and ability to create clean, intuitive interfaces.
• Excellent written and verbal communication.
• Thrives in a fast-paced startup environment.
• Ownership mindset and self-driven.
• Bachelor's degree in computer science or related field.

Responsibilities

• 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 devices and browsers.
• Collaborate with fullstack and backend developers and UX/UI designers to enhance usability.

Skills

React

JavaScript

TypeScript

Babel

Vite

Webpack

NPM

Yarn

REST APIs

JWTs

User experience

Communication

Startup mindset

Ownership mindset

CS fundamentals

Education

Bachelor's degree in Computer Science or related field

Job description

LangChain is seeking an experienced frontend engineer to develop and enhance features on LangSmith, our enterprise platform for observability, evaluation, and production reliability of AI systems. This role is onsite in Boston and collaborates with product, design, and backend teams.

You will build user-facing features with React and TypeScript, create reusable components, translate designs into code, and optimize performance across devices and browsers while maintaining a strong focus on UX and