StepFun
stepfun.com
Actively hiring
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Overview
News
Technologies
Salaries
Products
People
Growth
Offices
Jobs
Financials
Funding and backers
Latest round
Series B
Dec 2024 · 21 mo ago
Team
51-200
employees, estimated range
Backers
2
HongShan, Qiming Venture Partners
The money's age
Due for its next round
21 months since the last round · not hiring
Momentum
30/100
in the news, rising traction
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
Sep 20
On the Hacker News front page Step 5 Preview: Advancing the Pareto Frontier · 141 points
Feb 19
On the Hacker News front page Step 3.5 Flash – Open-source foundation model, supports deep reasoning at speed · 231 points
Dec 27, 2024
Raised a round Series B · SiliconANGLE
2023
Founded
Tractionpublic signals, read monthly
Web presence
top 0.33%
of 133.2M domains by links, Common Crawl
Hacker News stories
8
best: 231 points
Funding rounds
| Round | Date | Amount | Investors | Source |
|---|---|---|---|---|
| Series B | Dec 2024 | — | — | SiliconANGLE |
Backed byfrom the funds' portfolios and accelerator catalogs
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How StepFun hires
Truth index
B 75/100
Ghost roles
0%
Stale roles
100%
Reposted roles
0%
StepFun scores B on the Alion truth index (A is best, E worst), measured over 105 open roles re-checked against its own hiring board: 0% look like ghost listings, 100% have gone stale and 0% are the same role posted again. It measures how much of what this employer publishes turns into a real, finite search - not the employer as a workplace. How the index is computed
Overview
StepFun is a Chinese foundation model laboratory building a full range of models from language to speech, image and video. Its Step series includes very large mixture of experts models and multimodal systems, and the company releases open weights alongside commercial offerings. The laboratory was founded by a former senior Microsoft executive and is among the most heavily funded of the Chinese model startups; its models are used in Chinese consumer applications and enterprise deployments across several industries.
News
StepFun's New Model, 1/7th the Cost株式会社クリエティ 代表取締役 渡邉太也
Chinese AI company StepFun has announced its new flagship model, "Step 5 Preview." API access is already available.Of the 600B, only 27B are activeThe total parameter count is 600B. However, it uses a so-called sparse MoE configuration where only 27B are
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Report
StepFun (@StepFun_ai) on X
We've open-sourced onPanda - the tool we use internally for LLM data annotation and model inspection.The workflow is simple: find an error, correct the token, and let the model continue. Data annotation- 52% lower median annotation time vs. manual post-ed
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Report
Report
StepFun Releases Step 5 Preview, Approaching GLM-5.3 Performance at $1 InputAInote=まさき
Hello, this is Masaki.A top-tier model has been priced at $1 per million input tokens. This is the new flagship, "Step 5 Preview," released by China's StepFun. They have made the sparse MoE, with approximately 600B total parameters, available via API on t
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Report
StepFun (@StepFun_ai) on X
Introducing Step 5 Preview: Advancing the Pareto Frontier.Step 5 Preview is our new flagship model for agentic work, delivering frontier-level performance across software engineering and professional knowledge work, with particular strength in finance.- 6
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Report
Step 5 Preview - Intelligence, Performance & Price Analysis Artificial Analysis
Analysis of StepFun's Step 5 Preview and comparison to other AI models across key metrics including quality, price, performance (tokens per second & time to first token), context window & more.
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Report
Papermark The Open Source DocSend Alternative
Papermark is an open-source document sharing alternative to DocSend with built-in analytics.
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The Trumps' crypto project just got one step closer to becoming a bank
A regulatory charter for World Liberty Financial could be "the most brazen act of self-dealing our system has ever seen."
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Show more news
Tech stack
Technologies named in job postings at StepFun over the last 12 months, by layer, with the share of postings for each.
Technologies in use
156
Postings analysed
144
Stack modernity
82/100AI adopter
Languages
Python39%
Java22%
C++17%
TypeScript8%
Frameworks & libraries
PyTorch13%
Flink5%
Megatron-LM4%
LangChain3%
Databases
MySQL5%
Redis3%
ClickHouse1%
ElasticSearch1%
Cloud & platforms
Linux7%
OpenAI5%
vLLM5%
Kubernetes5%
AI & ML
LLM24%
Claude6%
VLM3%
DeepSeek2%
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Full StepFun tech stack
156 technologies · by team · pay by technology · changes · similar stacks
Growth
Hiring Momentum
70/100
Growing
Open positions
223
11 opened / 0 closed in 30 days
ATS activity
Every ~3 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
16%
QA
15% ▲
Product
14%
Backend
12% ▲
Industrial Engineering
9% ▼
DevOps
8% ▲
Actively hiring for QA (+14 in 30 days)
Activity Timeline
+11 jobs in a week
Oct 2026
New location: Shenzhen
Oct 2026
New location: Shanghai
Oct 2026
New location: Beijing
Oct 2026
New location: United States
Oct 2026
Added GitLab to stack
Aug 2026
Added Amazon S3 to stack
Aug 2026
Added PostgreSQL to stack
Aug 2026
Added JUnit to stack
Aug 2026
Added Java to stack
Aug 2026
Added ClickHouse to stack
Aug 2026
Offices
Where the company hires and what each office is for
Cities
3
Hiring now
3
Countries
1
Busiest office
Shanghai
Loading the map
Headquarters
Builds here
Office with open vacancies
Tap a pin for the office
Shanghai
China
HQ
141 open roles 83 posted in 90 days 59% engineering 50-200 est. staff
hires for AI/ML, Product, Industrial Engineering
Beijing
China
Regional office
66 open roles 26 posted in 90 days 68% engineering 10-50 est. staff
hires for AI/ML, Product, Backend
Shenzhen
China
Engineering / R&D
31 open roles 24 posted in 90 days 81% engineering 10-50 est. staff
hires for QA, Hardware, Backend
Jobs
≈ $23k – $54k per year (Estimated) • In office • Full-Time • 3+ years exp • Beijing
Python
SQL
RLHF
LLM
SFT
Apply
Apply
In office • Full-Time • Shanghai
Python
Java
TypeScript
Docker
Kubernetes
Linux
Apply
Apply
≈ $29k – $86k per year (Estimated) • In office • Full-Time • Shenzhen
Python
Java
TypeScript
MQTT
Apply
In office • Full-Time • Shenzhen
Python
Java
TypeScript
Speech Recognition
LLM
RAG
Text-to-Speech
Apply
In office • Full-Time • Beijing
Python
DeepSpeed
RLHF
Function Calling
VLM
LLM
Synthetic Data
Megatron-LM
Tool Use
Apply
≈ $34k – $94k per year (Estimated) • In office • Full-Time • 8+ years exp • Shanghai
Python
SQL
NCCL
InfiniBand
NVLink
Apply
In office • Full-Time • 3+ years exp • Beijing
AI Agents
InfiniBand
NVLink
DevOps
containerd
Git
KVM
QEMU
eBPF
HPC
Linux
Apply
Financials
Latest round
Series B
Funding rounds
1
Funding rounds
| Round | Announced | Amount | |
|---|---|---|---|
| Series B | 2024 | — | Details |