Heirloom
Heirloom is a provider of direct air capture technology to enhance the natural process of CO2 absorption from the atmosphere. Its technology accelerates limestone's ability to capture carbon dioxide, storing it permanently underground while operating with renewable energy.
San Francisco, CA, USA200 people
3 open roles
Roles are read from Heirloom’s Ashby every hour and disappear here as soon as they close there.
Heirloom hiring insights
Counted from every role read from its board, compared with every startup listed on firsthires.live.
Key findings
- Heirloom has the 1748th most open roles of 2,939 startups hiring on firsthires.live.
- 3 open roles is 0.3× the average hiring startup (10.1).
- 100% of openings are in Engineering.
- Most roles are senior (100%). None are tagged for graduates or interns.
- With a team of about 200, these openings would grow headcount by up to 2%.
- Engineering pay here (median $185k) is in line with the market median for Engineering ($184k).
Show 5 more findingsShow fewer findings
- 100% of its roles post pay, against 42% across all listed startups.
- 0% of its roles are fully remote (market: 23%).
- 100% of postings mention equity.
- 3 roles added in the last 30 days; 0 closed in the last 90.
- A typical open listing here is 23 days old, against 2 months across the site.
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
- Heirloom hasn’t added enough roles in the last few months to read a trend yet.
Hiring history
- Roles ever listed here
- 3
- Roles added in 30 days
- 3
- Roles added in 90 days
- 3
- Roles closed in 90 days
- 0
- Tracked since
- Oct 2026
- Rank by open roles
- #1,748
- of 2,939 hiring startups
- Openings per current employee
- 0.01
Volume and freshness
- Open roles
- 3
- Listed in the last 7 days
- 0
- 0% of open roles
- Listed in the last 30 days
- 2
- 67% of open roles
- Typical listing age
- 23 days
- Oldest: 3 months
Pay
- Median posted pay
- $185k
- Annual USD, range midpoint
- Middle half of pay
- $181k–$191k
- 25th to 75th percentile
- Roles that post pay
- 100%
- 3 of 3
- Mention equity
- 100%
Work, level and access
- Fully remote
- 0%
- Say they sponsor visas
- 0
- Graduate and intern roles
- 0
- Median experience asked
- 8 yrs
Breakdowns
3
MayJunJulAugSeptOct
By the month firsthires.live first saw each role.
- 1Engineering3100%
- 1Senior3100%
- 1Hybrid133%
- 2Not stated133%
- 3Onsite133%
- 1Brisbane3100%
- 1Full-time3100%
- 1EPC267%
- 2Engineering133%
$145kLow$181k25th$185kMedian$191k75th$233kHigh
Pay is each role’s posted range converted to annual US dollars, midpoint. See every Heirloom role.