CSI tech stack
CSI builds mostly with SQL, JavaScript, TypeScript, C#. Its stack also includes Azure, Azure DevOps, Snowflake, Angular. SQL is named in 12 of the 22 job postings CSI published in the last 12 months (55%). Counted by Alion from the job postings of CSI, updated Sep 26, 2026.
What programming languages does CSI use?
SQL is named in 55% of job postings at CSI, followed by JavaScript (36%), TypeScript (27%), C# (18%).
C# 
Show all (9)
What frameworks and libraries does CSI use?
Angular is named in 14% of job postings at CSI, followed by Scikit-learn (9%), React.js (9%), LightGBM (5%).
What databases does CSI use?
Snowflake is named in 18% of job postings at CSI, followed by MS SQL (5%).
What cloud and platforms does CSI use?
Azure is named in 32% of job postings at CSI, followed by Azure DevOps (27%), .NET (18%), AWS (14%).
Show all (12)
What developer tools does CSI use?
Copilot is named in 18% of job postings at CSI, followed by Rest API (14%), dbt (9%), Microsoft Excel (5%).
What AI and ML technologies does CSI use?
ChatGPT is named in 14% of job postings at CSI, followed by Claude (14%).
Which engineering practices does CSI ask for?
CI/CD is named in 23% of job postings at CSI, followed by Machine Learning (18%), ETL/ELT (9%), A/B Testing (9%).
What does each CSI team work with?
The technologies each team's postings require most often, with the number of postings that require them.
Product
5 postingsBackend
4 postingsHow does your stack fit CSI?
How is the CSI 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 CSI stack?
CSI scores 82 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 CSI stack in its industry?
Share of the 561 companies in the same industries, whose stack Alion knows, that use each technology.
Companies with a stack like CSI
Questions about the CSI tech stack
What programming languages does CSI use?
The languages named in CSI job postings are SQL (55%), JavaScript (36%), TypeScript (27%), C# (18%), Node JS (18%), as a share of the 22 postings of the last 12 months.
Does CSI use Angular?
Yes. Angular is named in 3 of 22 job postings (14%) and required in 2 of them.
What cloud and platforms does CSI use?
The cloud and platforms named in CSI job postings are Azure (7), Azure DevOps (6), .NET (4) (postings in brackets).
What skills do you need for a Product job at CSI?
Product postings at CSI most often require ChatGPT (2), Claude (2), Copilot (2), out of 5 postings in the last 12 months.
Is the CSI tech stack changing?
Yes. Rest API, Java first appeared in CSI job postings in the last six months.
How modern is the CSI tech stack?
CSI scores 82 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 CSI tech stack?
Alion reads every job posting CSI publishes and tags the technologies each one names. The figures on this page count the 22 postings of the last 12 months and were updated on Sep 26, 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, "CSI tech stack: 42 technologies from 22 job postings", as of Sep 26, 2026. https://alion.io/company/csiweb/technologies