Senior Innovation Engineer, Marketplace

Built Technologies•Nashville, TN

5d•$140,000 - $180,000

About The Position

This role sits on Marketplace, expanding Built beyond workflow software into the services that surround every construction project, like inspections, appraisals, insurance, and materials sourcing. The team moves fast: standing up new products with real customers, building the durable platform underneath them, and sharpening the ones already in market. As a Senior Innovation Engineer, you'll contribute across those same three areas — helping build platform primitives, shipping new product prototypes with real customers, and improving products already in market — typically owning a well-scoped piece of that work with support from staff engineers and your manager, rather than driving an entire initiative end-to-end on your own. This is a hands-on building role, not a people-management one; you'll also start mentoring newer engineers on the team as you grow into more ownership.

Requirements

Typically 4-7 years of experience in software engineering, with solid backend/distributed-systems fundamentals.
Experience shipping a technical MVP or prototype from concept to a customer-testable state, ideally in a fast-iteration environment with real customers.
Some experience building with or integrating LLM providers (e.g., Claude, Gemini, OpenAI) and/or document-extraction tooling, or strong aptitude and interest in growing into it quickly.
Comfort working across the stack as needed, plus genuine curiosity about the customer problem, low ego, and a preference for working closely with product rather than in a handoff model.

Nice To Haves

Exposure to agent harnesses, RAG pipelines, or other AI/LLM-integrated workflows is a plus.
Data engineering, ML, or document-processing background is a meaningful plus — a good amount of this team's work involves reasoning over unstructured, non-standardized documents (legal terms, covenants, inspection reports).
Experience in financial services, construction, real estate, payments, lending, insurance, or other complex B2B environments is a meaningful differentiator, though not required.

Responsibilities

Help design and build the durable, reusable services that every Marketplace product depends on — things like purchase orders, contract terms, invoicing rails, and workflow/status state machines — using fine-grained microservices and asynchronous workflow orchestration (e.g., Temporal).
Build prototypes and MVPs for new marketplace products, working directly with customers to validate ideas quickly and iterating weekly based on their feedback.
Support quality, craftsmanship, and adoption work on products that have already launched — improving workflows, fixing friction points, and raising the bar on usability for customers already using them.
Build and refine agent harnesses and AI/LLM-integrated workflows — for example, extracting and reasoning over unstructured documents using a mix of document-extraction tooling and direct calls to models like Claude, Gemini, and OpenAI. Use the team's internal eval tooling to test and improve what you ship.
Participate in customer discovery conversations and synthesize findings into clear input for the team's product and engineering leads.
Partner with staff engineers on system design decisions, and begin taking on informal mentorship of newer engineers on the team.
Help identify and fix friction in the team's workflows within the scope of your own projects.