H2O tech stack
H2O builds mostly with Python, Java, JavaScript, Bash. Its stack also includes Kubernetes, AWS, LangChain, PyTorch. Kubernetes is named in 12 of the 20 job postings H2O published in the last 12 months (60%). Counted by Alion from the job postings of H2O, updated Oct 14, 2026.
What programming languages does H2O use?
Python is named in 55% of job postings at H2O, followed by Java (10%), JavaScript (10%), Bash (10%).
What frameworks and libraries does H2O use?
LangChain is named in 30% of job postings at H2O, followed by PyTorch (25%), LlamaIndex (20%), Scikit-learn (20%).
LangChain
6 30%
PyTorch
5 25%
LlamaIndex
4 20%
Scikit-learn
4 20%
TensorFlow
4 20%
AutoGen
2 10%
Bootstrap
1 5%
FastAPI
1 5%
Show all (10)
What cloud and platforms does H2O use?
Kubernetes is named in 60% of job postings at H2O, followed by AWS (40%), GCP (40%), Azure (35%).
Kubernetes
12 60%
AWS
8 40%
GCP
8 40%
Azure
7 35%
GitHub Actions
3 15%
GitLab CI
3 15%
Apache Kafka
2 10%
Show all (11)
What developer tools does H2O use?
Rest API is named in 35% of job postings at H2O, followed by Docker (25%), Helm (25%), Microsoft Excel (15%).
Rest API
7 35%
Docker
5 25%
Helm
5 25%
Model Context Protocol
3 15%
gRPC
3 15%
Jenkins
3 15%
Ansible
2 10%
Show all (17)
What AI and ML technologies does H2O use?
LLM is named in 25% of job postings at H2O, followed by Claude (20%).
Which engineering practices does H2O ask for?
AI Agents is named in 100% of job postings at H2O, followed by Machine Learning (55%), CI/CD (45%), Agentic Workflows (25%).
AI Agents
20 100%
CI/CD
9 45%
Fine-tuning
5 25%
RAG
5 25%
Show all (17)
What does each H2O team work with?
The technologies each team's postings require most often, with the number of postings that require them.
AI/ML
5 postingsHow does your stack fit H2O?
How modern is the H2O stack?
H2O scores 85 out of 100 (Cutting-edge). The score averages how current each technology in the stack is and adds weight for AI adoption. AI technologies in the stack: 2; legacy ones: 0.
How common is the H2O stack in its industry?
Share of the 796 companies in the same industries, whose stack Alion knows, that use each technology.
What sets H2O apart
H2O products in its job postings
Postings at H2O name its own products. They describe what the company makes, so they are left out of the stack above.
Companies with a stack like H2O
Questions about the H2O tech stack
What programming languages does H2O use?
The languages named in H2O job postings are Python (55%), Java (10%), JavaScript (10%), Bash (10%), Go (5%), as a share of the 20 postings of the last 12 months.
Does H2O use LangChain?
Yes. LangChain is named in 6 of 20 job postings (30%) and required in 4 of them.
What cloud and platforms does H2O use?
The cloud and platforms named in H2O job postings are Kubernetes (12), AWS (8), GCP (8) (postings in brackets).
What skills do you need for a AI/ML job at H2O?
AI/ML postings at H2O most often require Docker (5), Kubernetes (5), PyTorch (5), Python (5), out of 5 postings in the last 12 months.
Is the H2O tech stack changing?
No new technology has appeared in H2O job postings in the last six months.
How modern is the H2O tech stack?
H2O scores 85 out of 100 (Cutting-edge). The score averages how current each technology in the stack is and adds weight for AI adoption. AI technologies in the stack: 2; legacy ones: 0.
How does Alion know the H2O tech stack?
Alion reads every job posting H2O publishes and tags the technologies each one names. The figures on this page count the 20 postings of the last 12 months and were updated on Oct 14, 2026.
Method and citation
Alion reads every job posting the company publishes and tags the technologies each one names. Shares count the postings of the last 12 months, open and closed; the company's own products are counted apart. How we count
Alion, "H2O tech stack: 65 technologies from 20 job postings", as of Oct 14, 2026. https://alion.io/company/h2o/technologies