ON tech stack
ON builds mostly with TypeScript, JavaScript, Node JS, SQL. Its stack also includes GCP, Apache Kafka, PostgreSQL, Nest.JS. TypeScript is named in 6 of the 20 job postings ON published in the last 12 months (30%). Counted by Alion from the job postings of ON, updated Sep 28, 2026.
What programming languages does ON use?
TypeScript is named in 30% of job postings at ON, followed by JavaScript (30%), Node JS (30%), SQL (10%).
What frameworks and libraries does ON use?
Nest.JS is named in 15% of job postings at ON, followed by BullMQ (15%), React.js (10%), Next.js (5%).
What databases does ON use?
PostgreSQL is named in 25% of job postings at ON, followed by BigQuery (5%), Google BigQuery (5%), Snowflake (5%).
BigQuery 
What cloud and platforms does ON use?
GCP is named in 30% of job postings at ON, followed by Apache Kafka (25%), Kubernetes (20%), Looker (15%).
GCP
6 30%
Apache Kafka
5 25%
Kubernetes
4 20%
AWS
2 10%
Power BI
2 10%
Azure
1 5%
Show all (14)
What developer tools does ON use?
GraphQL is named in 30% of job postings at ON, followed by Docker (15%), Adobe Illustrator (10%), Adobe Photoshop (10%).
GraphQL
6 30%
Docker
3 15%
Adobe Illustrator
2 10%
Adobe Photoshop
2 10%
Rest API
2 10%
Terraform
2 10%
Sketch
1 5%
Show all (9)
Which engineering practices does ON ask for?
AI Agents is named in 20% of job postings at ON, followed by CI/CD (10%), Agentic Workflows (5%), Digital Twin (5%).
What does each ON team work with?
The technologies each team's postings require most often, with the number of postings that require them.
Backend
6 postingsHow does your stack fit ON?
How is the ON 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 ON stack?
ON scores 81 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: 1; legacy ones: 0.
How common is the ON stack in its industry?
Share of the 90 companies in the same industries, whose stack Alion knows, that use each technology.
What sets ON apart
Companies with a stack like ON
Questions about the ON tech stack
What programming languages does ON use?
The languages named in ON job postings are TypeScript (30%), JavaScript (30%), Node JS (30%), SQL (10%), Java (5%), as a share of the 20 postings of the last 12 months.
Does ON use Nest.JS?
Yes. Nest.JS is named in 3 of 20 job postings (15%) and required in 3 of them.
What cloud and platforms does ON use?
The cloud and platforms named in ON job postings are GCP (6), Apache Kafka (5), Kubernetes (4) (postings in brackets).
What skills do you need for a Backend job at ON?
Backend postings at ON most often require GCP (6), GraphQL (6), TypeScript (6), JavaScript (5), out of 6 postings in the last 12 months.
Is the ON tech stack changing?
Yes. Adobe Illustrator, Adobe Photoshop, Power BI, SQL first appeared in ON job postings in the last six months.
How modern is the ON tech stack?
ON scores 81 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: 1; legacy ones: 0.
How does Alion know the ON tech stack?
Alion reads every job posting ON 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 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, "ON tech stack: 46 technologies from 20 job postings", as of Sep 28, 2026. https://alion.io/company/on-6/technologies