BioStack Platforms
getbiostack.com
Actively hiring
AI Training Data & Annotation
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Overview
Technologies
Salaries
Products
People
Growth
Offices
Jobs
Financials
Funding and backers
Team
51-200
employees, estimated range
Hiring now
1
+1 posted in 30 days
Backers
1
Y Combinator
Momentum
13/100
hiring for its size
Last sign of life
this month
a posting or a news item
The story so fareach stage dated by its source: the company's releases, the press, registers, filings
Apr 2026
Went through Y Combinator
Tractionpublic signals, read monthly
Web presence
top 7%
of 133.2M domains by links, Common Crawl
Backed byfrom the funds' portfolios and accelerator catalogs
Y Combinator Investors in similar startupsfunds that back the companies most like this one
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Tech stack
Technologies named in job postings at BioStack Platforms over the last 12 months, by layer, with the share of postings for each.
Technologies in use
9
Postings analysed
1
Stack modernity
64/100
Cloud & platforms
OpenAI
Practices & domains
AI Agents
LLM Evaluation
Post-training
RLAIF
RLHF
Reinforcement Learning
Reward Modeling
SFT
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Growth
Hiring Momentum
28/100
Slowing
Open positions
1
0 opened / 0 closed in 30 days
ATS activity
Every ~4 hours
Today
Hiring Dynamics
0%
Hiring Focus
The percentage next to each role is its share of the company's job openings over the last 90 days; the arrow shows the shift versus the previous period.
AI/ML
100% ▲
Offices
Where the company hires and what each office is for
Cities
1
Hiring now
1
Countries
1
Busiest office
San Francisco
San Francisco
United States
HQ
1 open roles 1 posted in 90 days 100% engineering 50-200 est. staff $350k Avg Salary
hires for AI/ML
Jobs
$200k – $350k per year • Equity 0.1–1% • In office • Full-Time • San Francisco
RLHF
Reinforcement Learning
AI Agents
OpenAI
SFT
Post-training
LLM Evaluation
RLAIF
Reward Modeling
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