Onwelo tech stack
Onwelo builds mostly with SQL, Python, Java, JavaScript. Its stack also includes AWS, Azure, Spring Boot, PyTorch. SQL is named in 19 of the 34 job postings Onwelo published in the last 12 months (56%). Counted by Alion from the job postings of Onwelo, updated Sep 28, 2026.
What programming languages does Onwelo use?
SQL is named in 56% of job postings at Onwelo, followed by Python (32%), Java (21%), JavaScript (6%).
SQL
19 56%
Python
11 32%
Java
7 21%
JavaScript
2 6%
TypeScript
2 6%
Apex
1 3%
Assembly
1 3%
Bash
1 3%
Show all (10)
What frameworks and libraries does Onwelo use?
Spring Boot is named in 18% of job postings at Onwelo, followed by PyTorch (15%), Scikit-learn (15%), TensorFlow (15%).
Spring Boot
6 18%
PyTorch
5 15%
Scikit-learn
5 15%
TensorFlow
5 15%
Angular
2 6%
LightGBM
2 6%
Pandas
2 6%
Pydantic
2 6%
Show all (16)
What databases does Onwelo use?
PostgreSQL is named in 6% of job postings at Onwelo, followed by Apache Iceberg (3%), ElasticSearch (3%), MS SQL (3%).
PostgreSQL
2 6%
Apache Iceberg
1 3%
ElasticSearch
1 3%
MS SQL
1 3%
MariaDB
1 3%
Milvus
1 3%
Oracle
1 3%
Pinecone
1 3%
Show all (9)
What cloud and platforms does Onwelo use?
AWS is named in 35% of job postings at Onwelo, followed by Azure (35%), GCP (26%), Kubernetes (15%).
AWS
12 35%
Azure
12 35%
GCP
9 26%
Kubernetes
5 15%
Azure DevOps
2 6%
Power BI
2 6%
Show all (28)
What developer tools does Onwelo use?
Rest API is named in 29% of job postings at Onwelo, followed by Docker (18%), Git (12%), Terraform (9%).
Rest API
10 29%
Docker
6 18%
Git
4 12%
Terraform
3 9%
Ansible
2 6%
Jenkins
2 6%
dbt
2 6%
Copilot
2 6%
Show all (23)
What AI and ML technologies does Onwelo use?
LLM is named in 21% of job postings at Onwelo, followed by Claude (3%), GPT-4 (3%), Gemini (3%).
Which engineering practices does Onwelo ask for?
CI/CD is named in 41% of job postings at Onwelo, followed by Machine Learning (24%), RAG (15%), AI Agents (9%).
CI/CD
14 41%
RAG
5 15%
AI Agents
3 9%
Function Calling
3 9%
Show all (19)
What does each Onwelo team work with?
The technologies each team's postings require most often, with the number of postings that require them.
Data Science
8 postingsAI/ML
7 postingsBackend
5 postingsHow does your stack fit Onwelo?
How much does Onwelo pay by technology?
Median stated pay of the postings that name each technology, against the median of all Onwelo postings with stated pay: $80k across 13 postings.
| Technology | Postings with pay | Median | vs company median |
|---|---|---|---|
| SQL | 8 | $80k | 0% |
| Python | 6 | $80k | 0% |
| Azure | 5 | $84k | +5% |
| AWS | 5 | $80k | 0% |
How is the Onwelo stack changing?
Read from the dates of the postings themselves: a technology is new when the first posting that names it appeared in the last six months, rising or falling when its share of postings moved between the last two quarters.
How modern is the Onwelo stack?
Onwelo scores 86 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: 5; legacy ones: 0.
How common is the Onwelo stack in its industry?
Share of the 2,168 companies in the same industries, whose stack Alion knows, that use each technology.
Companies with a stack like Onwelo
Questions about the Onwelo tech stack
What programming languages does Onwelo use?
The languages named in Onwelo job postings are SQL (56%), Python (32%), Java (21%), JavaScript (6%), TypeScript (6%), as a share of the 34 postings of the last 12 months.
Does Onwelo use Spring Boot?
Yes. Spring Boot is named in 6 of 34 job postings (18%) and required in 6 of them.
What cloud and platforms does Onwelo use?
The cloud and platforms named in Onwelo job postings are AWS (12), Azure (12), GCP (9) (postings in brackets).
What skills do you need for a Data Science job at Onwelo?
Data Science postings at Onwelo most often require SQL (8), Python (5), AWS (2), Azure (2), out of 8 postings in the last 12 months.
Is the Onwelo tech stack changing?
Yes. AI Agents, Function Calling, Agentic Workflows, Tool Use first appeared in Onwelo job postings in the last six months.
How modern is the Onwelo tech stack?
Onwelo scores 86 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: 5; legacy ones: 0.
How does Alion know the Onwelo tech stack?
Alion reads every job posting Onwelo publishes and tags the technologies each one names. The figures on this page count the 34 postings of the last 12 months and were updated on Sep 28, 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, "Onwelo tech stack: 110 technologies from 34 job postings", as of Sep 28, 2026. https://alion.io/company/onwelo/technologies