Software Engineer, AI Agent

Mosaic.tech; San Francisco (CA); Hybrid; USD 160,000 - 265,000; Full time

Benefits offered by this job

Health benefits

Equity

Flexible paid time off

Job summary

Hex is seeking senior and staff-level fullstack engineers to build AI-powered features into the Hex platform. You’ll work with our Research team on context and model prompting and with product engineering on integration, shaping how thousands of users understand data.

This role is hybrid (1-2 days/week) out of our San Francisco or NYC offices, with a frontend stack of TypeScript, React, GraphQL, and Redux, and a backend using TypeScript, Express, Postgres, Redis, Kubernetes, Terraform, Helm, and

Qualifications

• 4+ years of software engineering experience.

Responsibilities

• Lead AI-powered feature work within Hex platform.
• Collaborate with Research on prompts and context for models.
• Integrate features with product engineering across frontend and backend.
• Own scalable agent infrastructure and experimentation tooling.

Skills

React

TypeScript

Architecture

Leadership

Browser

Performance

Mentoring

Go-to-market

Tools

Redux

GraphQL

Express

Postgres

Redis

Kubernetes

Terraform

Helm

AWS

Python

Job description

About the role

We are looking for senior and staff-level fullstack engineers eager to join the team building our leading Magic AI features.

At Hex we're deeply focused on building powerful, integrated AI features that augment and accelerate analytics workflows. The possibilities here are incredible, and we're uniquely positioned to re‑invent the way people think about understanding data.

In this role, you’ll take the lead on building AI-powered features into Hex, partnering closely with our Research team on context and model prompting, and the rest of our product engineering teams on integrating into the platform. The fruits of your work will fundamentally change the way that many thousands of people work with data, and give you a front‑row seat to the most exciting technological shift in our lifetimes. As part of our Agent Platform team, you’ll own the scalable agent infrastructure powering today’s most powerful data agents, as well as the cutting‑edge experimentation tooling that allows the rest of the team to rapidly deliver new AI features in the product.

We'd love to hear from you if you have:

• At least 4+ years of software engineering experience.
• Proficiency with React and Typescript in addition to knowledge around architecture and systems design.
• Experience leading and executing on major product initiatives.
• Excitement for getting your hands dirty and diving deep into how the browser works to develop high‑quality and performant user experiences.
• An aptitude for how web infrastructure works to develop high‑quality internal developer and external user experiences.
• An instinct for strategic thinking and aligning with business and product goals while keeping a healthy balance of velocity and engineering excellence.
• Interest in the data space, and a love of shipping great products and building tools that empower end users to do more.
• Experience maintaining a high quality bar for design, correctness, and testing.
• An ability to lead product initiatives while collaborating and mentoring fellow engineers.
• Curiosity and an interest in diving into the bigger picture of building a company, including go‑to‑market, customer development, people, and marketing.

This role will be hybrid (1‑2 days per week) based out of our San Francisco, California headquarters or NYC office.

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 a combination of Terraform, Helm, and AWS to deploy and maintain our stack.

In addition to our unique culture, Hex proudly offers a competitive total rewards package, including but not limited to, market‑bench salary & equity, comprehensive health benefits, and flexible paid time off.

The salary range for this role is: $160,000 - $265,000

The salary range shown may be a reflection of additional factors such as geographical location and skill ranges/levels we’re open to. Placement in the salary range will be decided upon completion of the interview process, taking into account factors like leaving room for growth, internal fairness & parity, your demonstrated skills, and the depth of your experience. Our Recruiting team will be able to provide more details during the interview process.

By submitting an application the candidate consents to the use of their personal information in accordance with the Hex Privacy policy: https://learn.hex.tech/docs/trust/privacy-policy