BlackLine tech stack
BlackLine builds mostly with C#, Python, SQL, Java. Its stack also includes GCP, AWS, Snowflake, PostgreSQL. C# is named in 20 of the 45 job postings BlackLine published in the last 12 months (44%). Counted by Alion from the job postings of BlackLine, updated Sep 27, 2026.
What programming languages does BlackLine use?
C# is named in 44% of job postings at BlackLine, followed by Python (42%), SQL (38%), Java (22%).
C# 
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What frameworks and libraries does BlackLine use?
LangChain is named in 11% of job postings at BlackLine, followed by React.js (11%), LangGraph (7%), PyTorch (7%).
LangChain
5 11%
React.js
5 11%
LangGraph
3 7%
PyTorch
3 7%
TensorFlow
2 4%
LlamaIndex
2 4%
Angular
1 2%
Appium
1 2%
Show all (14)
What databases does BlackLine use?
Snowflake is named in 27% of job postings at BlackLine, followed by PostgreSQL (16%), Pinecone (4%), Weaviate (4%).
Snowflake
12 27%
PostgreSQL
7 16%
Pinecone
2 4%
Weaviate
2 4%
BigQuery
1 2%
Google BigQuery
1 2%
MS SQL
1 2%
What cloud and platforms does BlackLine use?
GCP is named in 42% of job postings at BlackLine, followed by AWS (38%), Azure (38%), Kubernetes (24%).
GCP
19 42%
AWS
17 38%
Azure
17 38%
Kubernetes
11 24%
Apache Kafka
11 24%
.NET
10 22%
RabbitMQ
6 13%
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And 1 more, each named in fewer postings.
What developer tools does BlackLine use?
Cursor is named in 22% of job postings at BlackLine, followed by Terraform (16%), Docker (16%), Model Context Protocol (11%).
Cursor
10 22%
Terraform
7 16%
Docker
7 16%
Model Context Protocol
5 11%
Git
4 9%
Jenkins
3 7%
Copilot
3 7%
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What AI and ML technologies does BlackLine use?
Claude is named in 42% of job postings at BlackLine, followed by LLM (16%), Gemini (9%), ChatGPT (4%).
Which engineering practices does BlackLine ask for?
AI Agents is named in 49% of job postings at BlackLine, followed by CI/CD (40%), LLM Guardrails (22%), Human-in-the-Loop (22%).
AI Agents
22 49%
CI/CD
18 40%
RAG
8 18%
Prompt Engineering
5 11%
Show all (26)
What does each BlackLine team work with?
The technologies each team's postings require most often, with the number of postings that require them.
Backend
17 postingsFinance
6 postingsProduct
3 postingsAI/ML
3 postingsHow does your stack fit BlackLine?
How much does BlackLine pay by technology?
Median stated pay of the postings that name each technology, against the median of all BlackLine postings with stated pay: $212k across 22 postings.
| Technology | Postings with pay | Median | vs company median |
|---|---|---|---|
| GCP | 8 | $220k | +4% |
| AWS | 6 | $234k | +11% |
| Azure | 6 | $220k | +4% |
| C# | 6 | $205k | −3% |
| SQL | 5 | $213k | +1% |
| Apache Kafka | 5 | $213k | +1% |
How modern is the BlackLine stack?
BlackLine scores 85 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: 6; legacy ones: 0.
Companies with a stack like BlackLine
Questions about the BlackLine tech stack
What programming languages does BlackLine use?
The languages named in BlackLine job postings are C# (44%), Python (42%), SQL (38%), Java (22%), JavaScript (18%), as a share of the 45 postings of the last 12 months.
Does BlackLine use LangChain?
Yes. LangChain is named in 5 of 45 job postings (11%) and required in 4 of them.
What cloud and platforms does BlackLine use?
The cloud and platforms named in BlackLine job postings are GCP (19), AWS (17), Azure (17) (postings in brackets).
What skills do you need for a Backend job at BlackLine?
Backend postings at BlackLine most often require C# (14), GCP (11), AWS (10), Azure (10), out of 17 postings in the last 12 months.
Is the BlackLine tech stack changing?
No new technology has appeared in BlackLine job postings in the last six months.
How modern is the BlackLine tech stack?
BlackLine scores 85 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: 6; legacy ones: 0.
How does Alion know the BlackLine tech stack?
Alion reads every job posting BlackLine publishes and tags the technologies each one names. The figures on this page count the 45 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, "BlackLine tech stack: 137 technologies from 45 job postings", as of Sep 27, 2026. https://alion.io/company/blackline-com/technologies