9fin tech stack
9fin builds mostly with Python, SQL, TypeScript, Go. Its stack also includes AWS, Snowflake, Amazon ECS, PostgreSQL. Python is named in 23 of the 33 job postings 9fin published in the last 12 months (70%). Counted by Alion from the job postings of 9fin, updated Sep 27, 2026.
What programming languages does 9fin use?
Python is named in 70% of job postings at 9fin, followed by SQL (33%), TypeScript (9%), Go (6%).
What frameworks and libraries does 9fin use?
FastAPI is named in 12% of job postings at 9fin, followed by Flask (12%), OpenTelemetry (12%), Pydantic (6%).
FastAPI
4 12%
Flask
4 12%
OpenTelemetry
4 12%
Pydantic
2 6%
Cohere SDK
1 3%
Flink
1 3%
NumPy
1 3%
React.js
1 3%
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What databases does 9fin use?
Snowflake is named in 21% of job postings at 9fin, followed by PostgreSQL (12%), Google BigQuery (9%), BigQuery (6%).
BigQuery 
What cloud and platforms does 9fin use?
AWS is named in 48% of job postings at 9fin, followed by Amazon ECS (18%), Amazon CloudWatch (12%), AWS Lambda (9%).
AWS
16 48%
AWS Lambda
3 9%
Amazon EC2
2 6%
Kubernetes
2 6%
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What developer tools does 9fin use?
Docker is named in 21% of job postings at 9fin, followed by Model Context Protocol (15%), Terraform (15%), dbt (12%).
Docker
7 21%
Model Context Protocol
5 15%
Terraform
5 15%
dbt
4 12%
SigNoz
4 12%
Git
2 6%
Copilot
1 3%
Cursor
1 3%
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What AI and ML technologies does 9fin use?
LLM is named in 21% of job postings at 9fin, followed by ChatGPT (9%), Claude (9%), Gemma (3%).
Which engineering practices does 9fin ask for?
Platform Engineering is named in 21% of job postings at 9fin, followed by Machine Learning (18%), CI/CD (15%), Computer Vision (15%).
Platform Engineering
7 21%
CI/CD
5 15%
Computer Vision
5 15%
Embeddings
5 15%
RAG
5 15%
AI Agents
4 12%
Show all (32)
What does each 9fin team work with?
The technologies each team's postings require most often, with the number of postings that require them.
Product
7 postingsAI/ML
5 postingsDevOps
4 postingsBackend
3 postingsAnalytics
3 postingsHow does your stack fit 9fin?
How is the 9fin 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 9fin stack?
9fin 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 common is the 9fin stack in its industry?
Share of the 274 companies in the same industries, whose stack Alion knows, that use each technology.
Companies with a stack like 9fin
Questions about the 9fin tech stack
What programming languages does 9fin use?
The languages named in 9fin job postings are Python (70%), SQL (33%), TypeScript (9%), Go (6%), JavaScript (3%), as a share of the 33 postings of the last 12 months.
Does 9fin use FastAPI?
Yes. FastAPI is named in 4 of 33 job postings (12%) and required in 3 of them.
What cloud and platforms does 9fin use?
The cloud and platforms named in 9fin job postings are AWS (16), Amazon ECS (6), Amazon CloudWatch (4) (postings in brackets).
What skills do you need for a Product job at 9fin?
Product postings at 9fin most often require Python (6), SQL (6), Snowflake (3), AWS (2), out of 7 postings in the last 12 months.
Is the 9fin tech stack changing?
Yes. Amazon EC2, Amazon S3, IAM, Git first appeared in 9fin job postings in the last six months.
How modern is the 9fin tech stack?
9fin 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 9fin tech stack?
Alion reads every job posting 9fin publishes and tags the technologies each one names. The figures on this page count the 33 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, "9fin tech stack: 89 technologies from 33 job postings", as of Sep 27, 2026. https://alion.io/company/9fin/technologies