Billennium tech stack
Billennium builds mostly with SQL, Python, C#, JavaScript. Its stack also includes AWS, Snowflake, Azure, PostgreSQL. AWS is named in 43 of the 51 job postings Billennium published in the last 12 months (84%). Counted by Alion from the job postings of Billennium, updated Sep 27, 2026.
What programming languages does Billennium use?
SQL is named in 53% of job postings at Billennium, followed by Python (27%), C# (20%), JavaScript (14%).
Show all (10)
What frameworks and libraries does Billennium use?
Selenium is named in 16% of job postings at Billennium, followed by Playwright (14%), ASP.NET Core (8%), Angular (8%).
Selenium
8 16%
Playwright
7 14%
ASP.NET Core
4 8%
Angular
4 8%
TestNG
4 8%
Rest-Assured
4 8%
Hibernate
3 6%
Appium
3 6%
Show all (44)
And 4 more, each named in fewer postings.
What databases does Billennium use?
Snowflake is named in 80% of job postings at Billennium, followed by PostgreSQL (16%), MS SQL (8%), MySQL (6%).
Snowflake
41 80%
PostgreSQL
8 16%
MS SQL
4 8%
MySQL
3 6%
Azure SQL Database
2 4%
Cassandra
2 4%
Neo4j
2 4%
Azure Cosmos DB
1 2%
Show all (15)
What cloud and platforms does Billennium use?
AWS is named in 84% of job postings at Billennium, followed by Azure (35%), Postman (20%), .NET (12%).
AWS
43 84%
Azure
18 35%
Postman
10 20%
.NET
6 12%
GCP
6 12%
Azure DevOps
6 12%
Kubernetes
5 10%
Spark
4 8%
Show all (37)
What developer tools does Billennium use?
Git is named in 24% of job postings at Billennium, followed by Rest API (18%), Docker (14%), JMeter (10%).
Git
12 24%
Rest API
9 18%
Docker
7 14%
JMeter
5 10%
SoapUI
5 10%
Jenkins
3 6%
Terraform
3 6%
Show all (26)
What AI and ML technologies does Billennium use?
LLM is named in 10% of job postings at Billennium.
LLM
5 10%
Which engineering practices does Billennium ask for?
CI/CD is named in 35% of job postings at Billennium, followed by ETL/ELT (10%), SOAP (8%), RAG (6%).
CI/CD
18 35%
RAG
3 6%
AI Agents
1 2%
Clean Architecture
1 2%
Show all (21)
What does each Billennium team work with?
The technologies each team's postings require most often, with the number of postings that require them.
QA
15 postingsBackend
9 postingsData Science
9 postingsEnterprise Apps
6 postingsAI/ML
4 postingsHow does your stack fit Billennium?
How modern is the Billennium stack?
Billennium scores 73 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: 1; legacy ones: 0.
How common is the Billennium stack in its industry?
Share of the 1,660 companies in the same industries, whose stack Alion knows, that use each technology.
Companies with a stack like Billennium
Questions about the Billennium tech stack
What programming languages does Billennium use?
The languages named in Billennium job postings are SQL (53%), Python (27%), C# (20%), JavaScript (14%), Java (12%), as a share of the 51 postings of the last 12 months.
Does Billennium use Selenium?
Yes. Selenium is named in 8 of 51 job postings (16%) and required in 7 of them.
What cloud and platforms does Billennium use?
The cloud and platforms named in Billennium job postings are AWS (43), Azure (18), Postman (10) (postings in brackets).
What skills do you need for a QA job at Billennium?
QA postings at Billennium most often require SQL (10), Postman (8), Selenium (7), AWS (6), out of 15 postings in the last 12 months.
Is the Billennium tech stack changing?
No new technology has appeared in Billennium job postings in the last six months.
How modern is the Billennium tech stack?
Billennium scores 73 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: 1; legacy ones: 0.
How does Alion know the Billennium tech stack?
Alion reads every job posting Billennium publishes and tags the technologies each one names. The figures on this page count the 51 postings of the last 12 months and were updated on Sep 27, 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, "Billennium tech stack: 154 technologies from 51 job postings", as of Sep 27, 2026. https://alion.io/company/billennium/technologies