# Senior Innovation Engineer, Marketplace

**Company:** [Built](https://hotfix.jobs/companies/built)
**Location:** Nashville, TN
**Role:** Fullstack Engineering
**Salary:** $140k – $180k/yr
**Experience:** 5+ years
**Skills:** Backend Development, Distributed Systems, Microservices, Temporal, asynchronous workflows, LLMs, Claude, gemini, OpenAI, document extraction, RAG, Machine Learning, Data Engineering, document processing, APIs
**Posted:** 2026-08-07

> Build backend platform primitives, customer-tested marketplace products, and AI-integrated workflows for construction and real estate finance. The role requires 4–7 years of software engineering experience, distributed-systems fundamentals, MVP delivery experience, and familiarity with LLM or document-extraction tooling.

## Job Description

## Responsibilities
- Design and build durable, reusable Marketplace services and primitives, including purchase orders, contract terms, invoicing rails, and workflow/status state machines.
- Build prototypes and MVPs for new marketplace products, working directly with customers and iterating based on feedback.
- Improve launched products by optimizing workflows, resolving friction points, and raising usability and quality standards.
- Build and refine agent harnesses and AI/LLM-integrated workflows for extracting and reasoning over unstructured documents.
- Use document-extraction tools, model providers, and internal evaluation tooling to test and improve production systems.
- Participate in customer discovery and synthesize findings for product and engineering leads.
- Partner with staff engineers on system design and mentor newer engineers.
- Identify and fix workflow friction within assigned projects.
- Use AI tools to improve productivity, quality, speed, analysis, summarization, problem-solving, automation, and decision-making.

## Requirements
- Typically **4–7 years of software engineering experience**.
- Solid backend and distributed-systems fundamentals.
- Experience shipping a technical MVP or prototype to a customer-testable state.
- Experience integrating LLM providers or document-extraction tooling, or strong aptitude to learn quickly.
- Comfort working across the stack as needed.
- Curiosity about customer problems, low ego, and a preference for close product collaboration.

## Nice-to-haves
- Experience with agent harnesses, RAG pipelines, or other AI/LLM-integrated workflows.
- Data engineering, machine learning, or document-processing experience.
- Experience in financial services, construction, real estate, payments, lending, insurance, or complex B2B environments.

## Compensation & Benefits
- Salary range: **$140,000–$180,000 USD per year**.
- Equity.
- Medical, dental, and vision coverage.
- Unlimited paid time off.
- Employees outside the Nashville area travel to the Nashville office at least twice per year for company gatherings.

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