Machine Learning Engineer

Machine Learning Engineer

You'll build the ML behind Firecrawl — the models and the systems that serve them. That starts with search: training and shipping the ranking and relevance models for one of our fastest-growing products, then extending that work across extraction quality and LLM-driven features. You'll also own how we measure: A/B testing launches and building the experimentation frameworks the whole team ships against. If you ship models into production — whether your title says ML engineer or data scientist — this is for you.

Salary Range: $250,000–$290,000/year

Equity Range: Competitive equity — details shared during the process.

Location: San Francisco, CA (Onsite)

Job Type: Full-Time

Experience: 3+ years building ML or data-heavy systems in production

Visa: Must be legally authorized to work in the United States. We're not able to sponsor visas right now, though that may change down the line.

About Firecrawl

Firecrawl is the easiest way to turn the web into data AI agents can use. One API call converts any URL into clean, LLM-ready markdown or structured data - the boring-hard problem everyone building with LLMs eventually hits, solved.

We hit 8 figures in ARR in year one and more than doubled it in year two. We have 175k+ GitHub stars, and developers, agents, and category-defining AI companies build on us every day. Growth like this is rare, and we're just getting started.

We're a small team punching far above our weight. Everyone here owns a real piece of the product and company, end to end, and runs it themselves - no hiding behind process or headcount.

This is a place for people who want to work at the frontier: an AI company building the infrastructure other AI companies run on, not one bolting AI onto an existing product. We move fast, go deep, and are building the tools superintelligence will rely on to gather data from the web.

What You'll Do

Improve ranking and relevance for Firecrawl Search — from feature engineering to model training to production

Build and tune models for learning-to-rank, query understanding, and LLM-driven retrieval

Extend ML across Firecrawl's products — extraction quality, content classification, and evaluation of LLM-driven features

Mine query logs and behavioral data at scale to find where our products win and where they fail

Build the data pipelines that turn web-scale crawl and query data into training data and features

Work hands-on with platform, search engineers and cloud DevOps to get models running fast and cheap in production

Design and formulate our testing strategy — the A/B testing frameworks and offline evaluation the team ships against

Partner on product launches across Firecrawl: define success metrics, run the experiments, and make the ship/no-ship call on evidence

Report on how releases perform post-launch and turn the findings into the next iteration

What We're Looking For

You've shipped ML models into production systems and owned them after launch — deploying, monitoring, and retraining them, not handing them off

You have real ranking or relevance-modeling experience — learning-to-rank, recommendations, or search quality

You're comfortable in large, data-heavy systems: query logs, pipelines, and datasets that don't fit in memory

You write production-quality code (Python at minimum) and can work inside a real backend codebase

You're rigorous about measurement — you've designed and analyzed A/B tests and know when a lift is real

You can communicate results clearly to the team — what shipped, what moved, and what to do next

Nice to Have

MLOps experience — MLflow, experiment tracking, model registries, or feature stores; Kubernetes is a plus

Experience building or standardizing an experimentation framework at a previous company

Experience with embedding models, vector retrieval, or LLM-based relevance evaluation

Experience evaluating LLM outputs at scale — quality scoring, structured-extraction accuracy, or agent behavior

Spark or similar large-scale data processing experience

What We're NOT Looking For

A pure statistician or analyst who needs an engineering team to productionize their work

Someone who wants to specialize narrowly and hand off everything else

Someone who optimizes for process over shipping

A Note On Pace

We operate at an absurd level of urgency because the window for what we're building won't stay open forever. If that excites you, keep reading. If it doesn't, no hard feelings — but this role probably isn't for you.

Benefits & Perks

Available to all employees

Salary that makes sense — $250,000–$290,000/year, based on impact, not tenure

Own a piece — Gain competitive equity in what you're helping build

Generous PTO — 15 days mandatory, anything after 24 days, just ask (holidays excluded); take the time you need to recharge

Parental leave — 12 weeks fully paid, for all parents

Wellness stipend — $100/month for the gym, therapy, massages, or whatever keeps you human

Learning & Development — Expense up to $1,000/year toward anything that helps you grow professionally

Team offsites — A change of scenery, minus the trust falls

Sabbatical — 3 paid months off after 4 years, do something fun and new

Available to US-based full-time employees

Full coverage, no red tape — Medical, dental, and vision (100% for employees, 50% for spouse/kids) — no weird loopholes, just care that works

Life & Disability insurance — Employer-paid short-term disability, long-term disability, and life insurance — coverage for life's curveballs

Supplemental options — Optional accident, critical illness, hospital indemnity, and voluntary life insurance for extra peace of mind

Doctegrity telehealth — Talk to a doctor from your couch

401(k) plan — Retirement might be a ways off, but future-you will thank you

Pre-tax benefits — Access to FSAs and commuter benefits (US-only) to help your wallet out a bit

Pet insurance — Because fur babies are family too

Available to SF-based employees

SF HQ perks — Snacks, drinks, team lunches, intense ping pong, and peak startup energy

E-Bike transportation — A loaner electric bike to get you around the city, on us

Interview Process

Application Review — Send us your work and a quick note on why this excites you. Show us what you've built — search systems, indexing pipelines, ranking improvements. We care about what you've shipped, not where you went to school.

Intro Chat (~25 min) — A quick conversation to get to know each other before we go deep. We'll talk about what you've been working on, what drew you to Firecrawl, and what you're looking for in your next role. Time for your questions too.

Technical Chat (~45 min) — We'll dig into a real problem from our world; examples include: improving ranking quality with noisy relevance signals, designing the A/B test for a product launch, or building features from query logs — and talk through how you'd approach it. Come ready to think out loud; we care how you reason, not whether you memorized the answer.

Founder Chat (~25 min) — Culture, pace, ownership, and how you like to work. Time for your questions too.

Paid Work Trial (1-2 weeks) — Work with the team on a real, scoped piece of the product — paid at a contractor rate. It's the truest signal for both sides: you see what building at Firecrawl actually feels like, and we see how you ship. Remote-friendly, and we'll flex around your current commitments.

Decision — We move fast after the trial.

If you want your models ranking results for the whole web — and to see the impact in production the same week — you should join us.

👉 Apply now.