b12 Labs
Making hard molecules for Pharma and Biotech
1 open role
Roles are read from b12 Labs’s Y Combinator every hour and disappear here as soon as they close there.
b12 Labs hiring insights
Counted from every role read from its board, compared with every startup listed on firsthires.live.
Key findings
- b12 Labs has the 2195th most open roles of 2,630 startups hiring on firsthires.live.
- 1 open role is 0.2× the average Early startup here (4.4).
- With a team of about 3, these openings would grow headcount by up to 33%.
- Median posted pay of $140k is 7% below the Early startup median ($150k).
- Engineering pay here (median $140k) is 24% below the market median for Engineering ($185k).
- 100% of its roles post pay, against 42% across all listed startups.
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- 0% of its roles are fully remote (market: 22%).
- 100% of postings mention equity.
- 1 posting say they don’t sponsor visas.
- 1 role added in the last 30 days; 0 closed in the last 90.
- A typical open listing here is 2 months old, against 2 months across the site.
- Founded 1 year ago, in Y Combinator’s Summer 2025 batch.
Hiring momentum
Momentum scoreToo little data
50 is flat. Blends the 4-week change, the 12-week trend and net roles added.
- Added, last 4 weeks
- 00%
- vs 0 in the 4 weeks before
- Added last week
- 00%
- Week before: 0
- Weekly trend
- +0.00
- Roles/week, per week · R² 0.00
- Net roles, 4 weeks
- +0
- 0 added − 0 closed
- Forecast this week
- 0
- Holt exponential smoothing
- Average week
- 0.0
- σ 0.0 · CV —
- 4-week refresh rate
- 0%
- New roles ÷ open roles
- 4-week churn
- 0%
- Closed roles ÷ open roles
- Median time listed
- >90 days
- 0% close within 30 days
Week of 3 AugThis week (so far)
Momentum, explained
- b12 Labs hasn’t added enough roles in the last few months to read a trend yet.
Hiring history
- Roles ever listed here
- 1
- Roles added in 30 days
- 1
- Roles added in 90 days
- 1
- Roles closed in 90 days
- 0
- Tracked since
- Oct 2026
- Rank by open roles
- #2,195
- of 2,630 hiring startups
- Openings per current employee
- 0.33
Volume and freshness
- Open roles
- 1
- Listed in the last 7 days
- 0
- 0% of open roles
- Listed in the last 30 days
- 0
- 0% of open roles
- Typical listing age
- 2 months
- Oldest: 2 months
Pay
- Median posted pay
- $140k
- Annual USD, range midpoint
- Middle half of pay
- $140k–$140k
- 25th to 75th percentile
- Roles that post pay
- 100%
- 1 of 1
- Mention equity
- 100%
Work, level and access
- Fully remote
- 0%
- Say they sponsor visas
- 0
- 1 say they don’t
- Graduate and intern roles
- 0
- Median experience asked
- 3 yrs
Breakdowns
1
MayJunJulAugSeptOct
By the month firsthires.live first saw each role.
- 1Engineering1100%
- 1Mid level1100%
- 1Not stated1100%
- 1San Francisco1100%
- 1Full-time1100%
- 1Engineering1100%
$120kLow$140k25th$140kMedian$140k75th$160kHigh
$105kLow$105k25th$150kMedian$185k75th$185kHigh
Pay is each role’s posted range converted to annual US dollars, midpoint. See every b12 Labs role.