# Software Engineer, Fullstack

**Company:** [Hex](https://hotfix.jobs/companies/hex)
**Location:** San Francisco, CA, New York, NY
**Role:** Fullstack Engineering
**Salary:** $158k – $266k/yr
**Experience:** 3+ years
**Skills:** React, TypeScript, Python, Apollo Graphql, Redux, Express, Postgres, Redis, Kubernetes, Terraform, Helm, AWS, SQL
**Posted:** 2026-04-09

> Fullstack engineer building observability tools, AI context systems, and workflows for governing AI agents in data exploration platforms. Requires 3+ years experience with React, TypeScript, Python, and strong full-stack skills.

## Job Description

## What you will do

* Build observability tools that provide data teams with critical control and visibility, surfacing agent performance, usage metrics, and conversational audit trails for AI-driven insights.
* Design and implement AI context systems, managing structures for diverse inputs such as free-form rules, certified SQL queries, and deterministic semantic models.
* Create robust, full-stack workflows that allow data teams to effectively govern, debug, and curate the Hex agent’s knowledge, ensuring the reliability and trustworthiness of AI-generated answers across the entire organization.
* Tackle challenging back-end problems related to SQL compilation, semantic model development, and serializing database context to ensure deterministic and accurate AI outputs.
* Solve complex front-end UX challenges to present a large volume of technical information in an actionable, clear, and intuitive user interface.

## About you

* 3+ years of experience as a full-stack software engineer, comfortable navigating the entire application stack and building full-stack applications with **React**, **Typescript**, and/or **Python**.
* You have a strong understanding of front-end and back-end development principles, with an appreciation for both elegant user experiences and robust, scalable service architecture.
* You have empathy for data teams and understand the challenges involved in answering complex data questions and working with modern data warehouses.
* You are excited by the opportunity to work at the forefront of AI development, tackling novel problems in agentic reliability, governance, and model curation.
* You are pragmatic and action-oriented, focused on delivering high-quality solutions that directly contribute to business-critical features.

## Our stack

Our product is a web-based notebook and app authoring platform. Our frontend is built with **Typescript** and **React**, using a combination of **Apollo GraphQL** and **Redux** for managing application state and data. On the backend, we also use **Typescript** to power an **Express/Apollo GraphQL** server that interacts with **Postgres**, **Redis**, and **Kubernetes** to manage our database and **Python** kernels. Our backend is tightly integrated with our infrastructure and CI/CD, where we use **Terraform**, **Helm**, and **AWS** to deploy and maintain our stack.

## Compensation

The salary range for this role is: **$158,000 - $265,500**

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