Staff Software Engineer

Galaxy Software, Inc.; California; A distancia; USD 140.000 - 210.000; Jornada completa

Descripción de la vacante

Galaxy Software, Inc. is seeking an experienced product engineer to own the AI harness end-to-end, focusing on a model-agnostic runtime that interfaces with Claude, ChatGPT, and Gemini. You will design public APIs, build scheduled agents, and ship a home-services oriented web and chat experience.

Join founders to define the architecture, own shipping cadence, and ensure tenant isolation and scalable, secure data handling across customers. Remote-ready with strong TypeScript and React skills.

Formación

• Strong TypeScript, front-to-back development, and React experience.
• Ability to design public APIs and MCP server integrations.
• Experience shipping production-grade AI-powered features for customers.

Responsabilidades

• Own the AI harness end-to-end, model agnostic across Claude, GPT, and Gemini.
• Build evals to measure answer correctness and detect degradation.
• Design APIs and MCP server to integrate with Claude, ChatGPT, and Gemini.
• Ship web app and chat UI used by home services owners.
• Maintain tenant isolation, roles, and scope across customers.
• Develop background jobs and use AI tooling to ship fast.

Conocimientos

TypeScript

Frontend-backend

React

API design

LLM integration

Security

Multi-tenant

Product mindset

Herramientas

Temporal

GCP

Claude / ChatGPT / Gemini

Descripción del empleo

Our customer is a vertical AI company for the home services industry, serving HVAC, plumbing, electrical, and other trades businesses. Every one of their customers gets their own data environment, unified from the tools they already use and modeled into a semantic layer that agents can reason over.

Galaxy built and runs that data foundation alongside their team, and it’s live with real customers.

The Role

You’d be their first engineer, owning everything a customer touches. At the center is the AI harness, an agent runtime that takes a question, makes a plan, reaches into a customer’s data, and streams back an answer they can trust.

This is a product engineering role with AI at its core, not a research or model training role. The data infrastructure is covered, so you skip the plumbing and go straight to the product. You’ll work side by side with the founders, make your own architecture decisions, and help pick who joins next.

You will…

• Own the AI harness end to end, model agnostic across Claude, GPT, and Gemini
• Build evals that tell you when an answer is right and catch it when it gets worse
• Design a public API and an MCP server that bring the product into Claude, ChatGPT, and Gemini
• Build scheduled agents that run without anyone watching and deliver insights over email and text
• Ship the web app and chat experience a home services owner actually wants to use
• Keep tenant isolation, roles, and scopes airtight across every customer
• Shipped an LLM product real users touch, with agent loops, tool calling, streaming, and cost and latency in check
• Strong TypeScript, front to back, and some React
• Designed APIs other developers rely on
• Built on a semantic layer rather than raw SQL against the warehouse
• Security and multi-tenant instincts
• Built background jobs that run on their own, ideally with Temporal
• Real product taste, and you think about the business owner, not just the engineer
• A habit of shipping fast with AI coding tools, with no spec and full ownership
• Have built agents over structured data, semantic layers, or text to SQL
• Have built an MCP server or integrations into Claude, ChatGPT, or Gemini
• Know your way around GCP, deployment, and infrastructure
• Have taken a product from zero to one before

Details

Location

San Diego, Los Angeles, San Francisco, or remote

Compensation

Interview

Expect to walk us through an agent you actually shipped, what broke, and how you knew it was working