Sr. II ML Engineer

Trunk Tools, Inc.; United States; Hybrid; USD 170,000 - 230,000; Full time

Benefits offered by this job

Competitive salary

Stock option equity

Medical plans

Learning stipend

Remote & hybrid options

Lunch provided in NYC & Austin

Unlimited PTO

IRL retreats

Job summary

Trunk Tools, Inc. in the United States is seeking a senior ML engineer to own and evolve core parts of our AI platform, including multi-agent orchestration and document processing pipelines built on Kubernetes.

You will drive end-to-end projects from problem framing to production, contribute to knowledge graphs, and help scale search, retrieval, and data extraction for field operations.

Qualifications

• 7+ years of experience building and shipping production ML/AI systems.
• Proven track record of leading complex, ambiguous projects and driving them to impact.
• Strong experience with agentic systems, LLM-based applications, or orchestration frameworks.
• Deep experience in document processing pipelines (parsing, chunking, indexing, extraction) in distributed systems.
• Experience building or working with knowledge graphs / provenance graphs.
• Background in search/ranking NLP or large-scale data/ML infrastructure.
• Strong coding skills (Python, Go) with production focus.
• Highly analytical and product-minded, data-driven decision maker.
• Bonus: experience in construction or document-heavy industries.

Responsibilities

• Own and evolve core parts of our AI platform, spanning search, retrieval, and multi-agent orchestration.
• Lead the design and build-out of a multi-agent system, defining agent pillars and production collaboration.
• Architect and scale document processing pipelines (Kubernetes-based) for ingestion, parsing, indexing, and structured extraction across document types.
• Design and iterate on search and retrieval systems grounded in user behavior and product needs.
• Help build and expand our knowledge graph modeling entities and relationships.
• Drive high-impact projects end-to-end from problem definition through experimentation and productionization.
• Establish evaluation and experimentation frameworks to measure system quality and guide iteration.
• Write clean, production-grade code and raise engineering quality across the team.

Skills

Production ML/AI

Lead complex projects

Agentic systems/orchestration

Document processing pipelines

Knowledge graphs

Python/Go production code

Data-driven decisions

Education

Bachelor's degree in CS/ML

Tools

Kubernetes

LLM frameworks

Job description

At Trunk Tools, we’re the leading AI company revolutionizing construction, the second-largest industry on earth. We recently raised a $40M Series B led by Insight Partners, bringing our total funding to $70M from top-tier investors including Redpoint and Innovation Endeavors. This new round is fueling our next phase of growth as we scale AI agents across the jobsite.

Our mission is to build the future of construction through intelligent automation. Despite being a $13+ trillion industry, construction still runs largely on analog processes, we’re changing that by embedding AI directly into field operations.

Founded by builders and technologists (Stanford, MIT), our team has delivered software used by over 140,000 field professionals, impacting millions of users and contributing to $10B+ in built projects. Many of us come from the field ourselves, giving us a deep understanding of the industry’s unique challenges.

After years of building the “brain” of construction, we’re now launching production-ready AI agents, starting with intelligent document processing and Q&A, and rapidly expanding into core operational workflows. Our team has doubled in the past year, and with 100+ employees (50+ engineers), we’re scaling fast and entering a period of hypergrowth. This is a rare opportunity to join at an inflection point.

What you’ll do

• Own and evolve core parts of our AI platform, spanning search, retrieval, and multi-agent orchestration.

• Lead the design and build-out of a multi-agent system , including defining new agent “pillars” and how they collaborate in production.

• Architect and scale document processing pipelines (Kubernetes-based), including ingestion, parsing, chunking, indexing, and structured data extraction across heterogeneous document types.

• Design and iterate on search and retrieval systems (ranking, query understanding, QA) grounded in real user behavior and product needs.

• Help build and expand our knowledge graph , modeling entities and relationships to power downstream reasoning and retrieval.

• Drive ambiguous, high-impact projects end-to-end, from problem definition through experimentation and productionization.

• Establish and improve evaluation and experimentation frameworks to measure system quality and guide iteration.

• Write clean, maintainable, production-grade code and raise the bar for engineering quality across the team.

Who you are

• 7+ years of experience building and shipping production ML/AI systems.

• Proven track record of leading complex, ambiguous projects and driving them to impact.

• Strong experience with agentic systems, LLM-based applications, or orchestration frameworks.

• Deep experience in document processing pipelines (e.g., parsing, chunking, indexing, structured extraction), ideally in distributed systems (Kubernetes or similar).

• Experience building or working with knowledge graphs / provenance graphs and modeling relationships between entities.

• Background in one or more of: search/ranking systems, NLP, recommendation systems, or large-scale data/ML infrastructure.

• Strong coding skills (Python, Go, or similar) with an emphasis on production systems.

• Highly analytical, product-minded, and comfortable using data to drive decisions.

• Bonus: experience in construction or other document-heavy industries

What we offer

• A close-knit and collaborative early-stage startup environment where every voice is heard and every opinion matters
• Competitive salary and stock option equity packages
• 4 Medical Plans to choose from including 100% covered option. Plus Dental and Vision Insurance!
• Learning & Growth stipend
• Flexible long-term work options (remote and hybrid)
• Free lunch provided in the office in NYC & Austin - you’ll never go hungry with us!
• Unlimited PTO; We truly believe in work-life balance and that hard work should be balanced with time for rest and rejuvenation
• IRL / In-Person retreats throughout the year

Please note: All official communication from Trunk Tools will come from an email address ending in @ _trunk.tools_. If you receive outreach from any other domain, please disregard it or report it to us._

At Trunk Tools, we’re working hard to build a more productive and safer environment within the construction industry, and we strive to live by these same values here at Trunk Tools HQ. As an equal‑opportunity employer, we are committed to building an inclusive environment where you can be you. We work hard to evaluate all employees and job applicants consistently, without regard to race, color, religion, gender, national origin, age, disability, pregnancy, gender expression or identity, sexual orientation, or any other legally protected class.