Principal Product Engineer

You own the leverage. Set the architecture of the internal platform, define the ontology that lets one plant's data model transfer to the next, and turn a six-week implementation into a two-week one. A hands‑on role: you write code every day and work directly with the founders.

Location In-person only. Chattanooga, TN.

We help factories eliminate paper, manual data entry, and disconnected systems, replacing them with intelligent workflows that learn directly from the floor.

Our software connects machines, ERPs, and people in real time, turning tribal knowledge, production, and quality data into systems that run smoother, faster, and smarter.

Backed by the founders of Hub Spot, Typeform, Apollo, Hustle Fund, Brickyard, and more.

We help factories eliminate paper, manual data entry, and disconnected systems, replacing them with intelligent workflows that learn directly from the floor.

Our software connects machines, ERPs, and people in real time, turning tribal knowledge, production, and quality data into systems that run smoother, faster, and smarter.

Backed by the founders of Hub Spot, Typeform, Apollo, Hustle Fund, Brickyard, and more.

That means bringing world‑class technology back to the factory floor, empowering operators, restoring pride in American manufacturing, and helping people do their best work again.

We believe great companies are built by great people
, together, in person. We train together, eat together, and build products that move the needle for real industries and real people.

Our forward‑deployed engineers sit inside factories and build on top of what those factories already run. That work is fast, specific, and high‑trust. It is also where the leverage is: every integration, adapter, and data model we build on‑site is something the next deployment should not have to rebuild.

You own that leverage. As Principal Product Engineer you set the architecture of the internal platform, define the ontology that lets one plant's data model transfer to the next, and decide what gets productized versus what stays custom. You are the person who turns a six‑week implementation into a two‑week implementation, and then keeps compressing it.

This is a hands‑on role. You will write code every day, work directly with the founders, and go on‑site when the problem calls for it.

• Define the shared data model that maps machines, ERPs, work orders, quality records, and people across wildly different plants.
• Build the abstractions that let a deployment team map a new customer's systems into that model in days rather than weeks.
• Work directly with FDEs in the field to pressure‑test the model against reality, not against a whiteboard.

• Create monorepo-friendly scaffolds (Turborepo/Nx patterns), code‑generation templates, and CI/CD blueprints for repeatable, high‑quality deployments.
• Ship internal SDKs and adapters for common systems (auth, data ingestion, messaging, observability), plus CLI tools to spin up new services quickly.
• Establish golden paths for linting, testing, release and versioning, and environment bootstrapping.
• Channel field learnings into the core Harmony platform, deciding when to customize and when to productize.

• Make the architecture calls on services, data flow, and integration patterns, and write down why.
• Raise the floor on testing, observability, and security across everything the team ships.
• Mentor engineers on the deployment side so the platform gets used the way it was designed to be used.

• Define the shared data model that maps machines, ERPs, work orders, quality…