Jefferies tech stack
Jefferies builds mostly with JavaScript, C#, Python, SQL. Its stack also includes .NET, AWS, Snowflake, Oracle. JavaScript is named in 36 of the 36 job postings Jefferies published in the last 12 months (100%). Counted by Alion from the job postings of Jefferies, updated Oct 15, 2026.
What programming languages does Jefferies use?
JavaScript is named in 100% of job postings at Jefferies, followed by C# (94%), Python (14%), SQL (11%).
JavaScript
36 100%
C#
34 94%
Python
5 14%
SQL
4 11%
C++
2 6%
TypeScript
2 6%
Bash
1 3%
PowerShell
1 3%
Show all (10)
What frameworks and libraries does Jefferies use?
Angular is named in 3% of job postings at Jefferies, followed by React.js (3%).
What databases does Jefferies use?
Snowflake is named in 6% of job postings at Jefferies, followed by Oracle (3%).
What cloud and platforms does Jefferies use?
.NET is named in 94% of job postings at Jefferies, followed by AWS (8%), Azure (3%), Grafana (3%).
.NET
34 94%
AWS
3 8%
Azure
1 3%
Grafana
1 3%
Kubernetes
1 3%
Bamboo
1 3%
Show all (10)
What developer tools does Jefferies use?
Microsoft Excel is named in 25% of job postings at Jefferies, followed by Git (6%), Prometheus (3%).
Which engineering practices does Jefferies ask for?
CI/CD is named in 8% of job postings at Jefferies, followed by Machine Learning (8%), RAG (3%), SRE (3%).
What does each Jefferies team work with?
The technologies each team's postings require most often, with the number of postings that require them.
Early Careers
30 postingsFinance
4 postingsHow does your stack fit Jefferies?
How modern is the Jefferies stack?
Jefferies scores 70 out of 100 (Modern). The score averages how current each technology in the stack is and adds weight for AI adoption. AI technologies in the stack: 0; legacy ones: 1.
How common is the Jefferies stack in its industry?
Share of the 1,470 companies in the same industries, whose stack Alion knows, that use each technology.
Companies with a stack like Jefferies
Questions about the Jefferies tech stack
What programming languages does Jefferies use?
The languages named in Jefferies job postings are JavaScript (100%), C# (94%), Python (14%), SQL (11%), C++ (6%), as a share of the 36 postings of the last 12 months.
Does Jefferies use .NET?
Yes. .NET is named in 34 of 36 job postings (94%) and required in 32 of them.
What cloud and platforms does Jefferies use?
The cloud and platforms named in Jefferies job postings are .NET (34), AWS (3), Azure (1) (postings in brackets).
What skills do you need for a Early Careers job at Jefferies?
Early Careers postings at Jefferies most often require JavaScript (29), .NET (26), Microsoft Excel (9), Python (3), out of 30 postings in the last 12 months.
Is the Jefferies tech stack changing?
No new technology has appeared in Jefferies job postings in the last six months.
How modern is the Jefferies tech stack?
Jefferies scores 70 out of 100 (Modern). The score averages how current each technology in the stack is and adds weight for AI adoption. AI technologies in the stack: 0; legacy ones: 1.
How does Alion know the Jefferies tech stack?
Alion reads every job posting Jefferies publishes and tags the technologies each one names. The figures on this page count the 36 postings of the last 12 months and were updated on Oct 15, 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, "Jefferies tech stack: 31 technologies from 36 job postings", as of Oct 15, 2026. https://alion.io/company/jefferies/technologies