Senior Innovation Engineer, Marketplace

- Platform & primitives: 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).

- New product bets: Build prototypes and MVPs for new marketplace products, working directly with customers to validate ideas quickly and iterating weekly based on their feedback.

- Adoption & optimization: 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.

- AI-native development: 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.

- 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.

- 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).

- 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.

- You've shipped a meaningful piece of work in at least one of the team's three workstreams - a platform primitive, a new product prototype tested with real customers, or a usage/adoption improvement on a live product.

- You've contributed to or improved an agent-driven or AI-integrated system that's in production use.

- Other engineers on the team would describe you as a reliable, collaborative contributor who's growing into more ownership and mentoring newer teammates.

- Your customer discovery input is seen as a trusted contribution to the team's product decisions.

Built's salary range for this position is $140,000-$180,000 USD per year. The pay range is designed to accommodate upward mobility in the role; therefore, it encompasses the full span of proficiency levels for this role and we believe that the midpoint of the range is competitive in the market. Salary is just one component of Built's total compensation package for employees; your total rewards package at Built will include equity, market-current medical, dental and vision coverage, an unlimited PTO policy, and other benefits.