Cosine
cosine.sh
Actively hiring
AI Agents
Code Intelligence
As featured in
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Overview
Connections
News
Technologies
Salaries
Products
People
Growth
Offices
Jobs
Financials
Funding and backers
Team
1
UK accounts · Sep 2025
Hiring now
7
+7 posted in 30 days
Backers
3
Y Combinator, Soma Capital
Momentum
55/100
hiring for its size, in the news
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
Jan 2023
Went through Y Combinator
2023
Founded
Nov 26, 2019
Incorporated COSINE HOLDINGS LTD · Companies House
Tractionpublic signals, read monthly
Web presence
top 0.39%
of 133.2M domains by links, Common Crawl
Hacker News stories
10
best: 23 points
Registers and programsofficial lists and records that name the company
| Legal entity | COSINE HOLDINGS LTD | Companies House |
| Registered | 26 Nov 2019 |
Backed byfrom the funds' portfolios and accelerator catalogs
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Connections
List
Graph
Found in company registers, site code, DNS and hiring. Each connection shows how sure we are and the evidence, with its source and date.
Shared investors
UpHonest CapitalVia a fund
Soma CapitalVia a fund
876 portfolio companies
Y CombinatorVia a fund
6188 portfolio companies
Click a company to open it. Dashed lines are likely connections. The second step of the network is part of the Pro plan.
Owner
Same company
Same group
Likely
News
Converting between cosine similarity and concentration ratio
Concentration ratio may be easier to understand than cosine similarity, but it's still a little tricky to understand.
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Report
What counts as a large cosine similarity?
Vector embeddings let you conclude things like "king" "man" + "woman" approximately equals "queen". But this might not seem true when you look at the numbers.
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PrismSQL - Compile SQL from your schema, not ours
Upload your schema. Get parameterized SQL you run - the model never writes it. Sandbox free, Developer $49/mo, Pro $399/mo.
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Read Britain's first sovereign AI model secures blue-chip backing as Starmer unveils 400m plan
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Linear cosine palettes
Kind of a generative art thing, but mostly an attempt by the author to prove to herself that a she can write a short blog post without turning it into a goddamn monograph
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Show more news
Tech stack
Technologies named in job postings at Cosine over the last 12 months, by layer, with the share of postings for each.
Technologies in use
49
Postings analysed
8
Stack modernity
74/100AI adopter
Languages
Python
Go
JavaScript
Node JS
Frameworks & libraries
PyTorch
DeepSpeed
FSDP
React.js
Databases
Apache Iceberg
DuckDB
Cloud & platforms
Kubernetes
GCP
AWS
Azure
AI & ML
LLM
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Full Cosine tech stack
49 technologies · by team · pay by technology · changes · similar stacks
Growth
Hiring Momentum
70/100
Growing
Open positions
7
7 opened / 1 closed in 30 days
Median time-to-fill
101 days
faster than 12% of the market
ATS activity
Every ~4 hours
Today
Hiring Dynamics
+100%
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
43% ▲
Sales
29% ▲
HR
14% ▲
Marketing
14% ▲
Actively hiring for AI/ML (+3 in 30 days)
Activity Timeline
Added Red Teaming to stack
Oct 2026
Offices
Where the company hires and what each office is for
Cities
1
Hiring now
1
Countries
1
Busiest office
London
London
United Kingdom
HQ
7 open roles 7 posted in 90 days 43% engineering 50-200 est. staff
hires for AI/ML, Sales, HR
Jobs
≈ $105k – $204k per year (Estimated) · Equity · In office · Full-Time · London
Python
Fine-tuning
Multimodal AI
PyTorch
Time Series
Post-training
Machine Learning
DevOps
Git
Linux
Cybersecurity
GDPR
Robotics
Sensor Fusion
Apply
≈ $82k – $218k per year (Estimated) · Equity · In office · Full-Time · London
DeepSpeed
vLLM
RLHF
Reinforcement Learning
SGLang
PyTorch
Mixture of Experts
CUDA
SFT
Pre-training
FSDP
Machine Learning
DevOps
SLURM
Kubernetes
Cybersecurity
GDPR
Apply
Equity · In office · Full-Time · 3+ years exp · London
Python
SQL
Apache Iceberg
DuckDB
AI/ML
Reinforcement Learning
JAX
TensorFlow
PyTorch
LLM
Synthetic Data
SFT
DevOps
GCP
Azure
AWS
Docker
Kubernetes
Cybersecurity
GDPR
Apply