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Bicycle Frame Building Jobs in California (NOW HIRING)

Firecrawl

Research Engineer

San Francisco, CA · On-site

$250K - $290K/yr

This isn't an eval role where you inherit a framework and run benchmarks. You'll design the metrics ... We move fast, go deep, and are building the tools superintelligence will rely on to gather data ...

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Bicycle Frame Building information

What is bicycle frame building?

Bicycle frame building is the craft of designing, constructing, and assembling the main structural component of a bicycle—the frame. This process involves selecting appropriate materials such as steel, aluminum, titanium, or carbon fiber, cutting and shaping the tubing, and welding or brazing the pieces together. Skilled frame builders ensure the frame is strong, lightweight, and properly aligned for optimal performance and safety. Many frame builders create custom frames to fit individual riders’ needs and preferences. The craft combines engineering, metalworking, and design expertise.

What are the key skills and qualifications needed to thrive as a bicycle frame builder, and why are they important?

To thrive as a Bicycle Frame Builder, you need proficiency in metalworking, welding or brazing techniques, and a solid understanding of bicycle geometry and design. Familiarity with tools and machinery such as TIG welders, lathes, tube benders, and CAD software is typically required, along with knowledge of relevant safety standards. Attention to detail, problem-solving skills, and a passion for craftsmanship set exceptional builders apart in this field. These skills ensure the production of high-quality, safe, and precisely engineered bicycle frames that meet both performance and aesthetic standards.

What are some typical challenges encountered when working as a bicycle frame builder, and how can job seekers prepare for them?

Bicycle frame builders often face challenges such as maintaining precise tolerances, working with various frame materials (like steel, aluminum, or carbon fiber), and ensuring structural integrity throughout the fabrication process. Attention to detail and strong manual dexterity are essential, as small errors can affect the bike's performance and safety. To prepare, job seekers should develop strong metalworking or composite fabrication skills, become familiar with industry-standard tools, and seek opportunities to learn from experienced builders through apprenticeships or workshops.

What is the difference between Bicycle Frame Building vs Bicycle Repair Technician?

AspectBicycle Frame BuildingBicycle Repair Technician
CredentialsBasic mechanical skills, sometimes certifications in welding or metalworkMechanical skills, certifications in bike repair or mechanics
Work EnvironmentWorkshop or manufacturing setting, focus on custom or production framesBike shops, repair centers, mobile repair services
Industry UsageManufacturing, custom bike building, artisanal workshopsBike maintenance, repair, troubleshooting

While Bicycle Frame Building involves designing and constructing bicycle frames, often requiring metalworking skills and specialized tools, Bicycle Repair Technicians focus on diagnosing and fixing issues on existing bikes. Both roles require mechanical aptitude, but frame builders work more on fabrication and design, whereas repair technicians handle maintenance and repairs. Understanding these differences helps enthusiasts and professionals choose the right career path or service.

What are popular job titles related to Bicycle Frame Building jobs in California?

For Bicycle Frame Building jobs in California, the most frequently searched job titles are:

What job categories do people searching Bicycle Frame Building jobs in California look for?

The top searched job categories for Bicycle Frame Building jobs in California are:

Bicycle Frame Building jobs near you
Infographic showing various Bicycle Frame Building job openings in California as of August 2026, with employment types broken down into 100% Full Time. Highlights an 90% In-person, and 10% Hybrid job distribution.

Research Engineer

Firecrawl

San Francisco, CA • On-site

$250K - $290K/yr

Full-time

Medical, Dental, Vision, Life, Retirement, PTO

Re-posted 27 days ago

Job description

Research Engineer
You'll build the evaluation systems that tell us whether Firecrawl actually works. That sounds simple. It isn't. Our core promise, convert any URL into clean, structured, LLM-ready data reliably, is hard to measure rigorously across millions of different websites, formats, and edge cases. As the systems we're measuring get more complex, the question "did that work?" gets harder, not easier.
This isn't an eval role where you inherit a framework and run benchmarks. You'll design the metrics, build the pipelines, generate the datasets, and own the feedback loop from output quality back to model and product decisions. If you care about what "good" actually means and have the engineering depth to measure it, this is the role.
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: 4+ years in ML, research engineering, or data-heavy backend, with real evaluation work
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 170k+ 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
  • Design the metrics that define what "good output" actually means across millions of sites, formats, and edge cases
  • Build the pipelines and harnesses that measure quality rigorously and at scale
  • Generate and curate the datasets that make evaluation trustworthy
  • Own the feedback loop from output quality back to model and product decisions
  • Turn "did that work?" into an answer the whole team can act on

What We're Looking For
  • You have the engineering depth to build real evaluation systems, not just run existing ones
  • You care deeply about what "good" means and how to measure it rigorously
  • You're comfortable owning ambiguous problems where the metric itself has to be invented
  • You move fast and close the loop - you'd rather ship, measure, and iterate than perfect on paper

What We're NOT Looking For
  • Someone who only wants to run benchmarks someone else designed
  • A pure researcher who won't build the systems, or a pure engineer who won't think about methodology
  • Someone who needs a fully-specced ticket to start

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 (U.S.-based), 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 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
  1. Application Review - Send us your work and a quick note on why this excites you. Show us what you've built - eval systems, metrics you designed, datasets you created, quality problems you measured. We care about what you've shipped, not where you went to school.
  2. 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.
  3. Technical Chat (~45 min) - We'll dig into a real problem from our world - how you'd measure whether messy web output is actually "good," and build the system to prove it. Come ready to think out loud; we care how you reason, not whether you memorized the answer.
  4. Founder Chat (~25 min) - Culture, pace, ownership, and how you like to work. Time for your questions too.
  5. Paid Work Trial (1-2 weeks) - Work with the team on a real, scoped evaluation problem - 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.
  6. Decision - We move fast after the trial.

If you care about what "good" actually means and have the engineering depth to measure it, you should join us.
Apply now.

Apply