Capital One tech stack
Capital One builds mostly with Python, Scala, SQL, JavaScript. Its stack also includes AWS, GCP, PyTorch, Snowflake. AWS is named in 1,577 of the 2,181 job postings Capital One published in the last 12 months (72%). Counted by Alion from the job postings of Capital One, updated Nov 12, 2026.
What programming languages does Capital One use?
Python is named in 65% of job postings at Capital One, followed by Scala (39%), SQL (34%), JavaScript (33%).
Python
1412 65%
Scala
856 39%
SQL
742 34%
JavaScript
715 33%
TypeScript
637 29%
Java
501 23%
C#
461 21%
Go
374 17%
Show all (31)
What frameworks and libraries does Capital One use?
PyTorch is named in 14% of job postings at Capital One, followed by React.js (4%), Scikit-learn (4%), NeMo Guardrails (4%).
PyTorch
309 14%
React.js
82 4%
Scikit-learn
81 4%
NeMo Guardrails
80 4%
TensorFlow
79 4%
Dagster
73 3%
Hadoop
69 3%
Show all (71)
And 31 more, each named in fewer postings.
What databases does Capital One use?
Snowflake is named in 9% of job postings at Capital One, followed by Cassandra (7%), Amazon Redshift (6%), DynamoDB (5%).
Snowflake
198 9%
Cassandra
145 7%
Amazon Redshift
136 6%
DynamoDB
103 5%
MySQL
70 3%
MongoDB
60 3%
PostgreSQL
17 1%
ElasticSearch
8 <1%
Show all (25)
What cloud and platforms does Capital One use?
AWS is named in 72% of job postings at Capital One, followed by GCP (53%), Azure (53%), Kubernetes (28%).
AWS
1577 72%
GCP
1150 53%
Azure
1147 53%
Kubernetes
619 28%
Spark
416 19%
GitHub
309 14%
Bitbucket
260 12%
Show all (73)
And 33 more, each named in fewer postings.
What developer tools does Capital One use?
Docker is named in 26% of job postings at Capital One, followed by Git (13%), Claude Code (4%), Copilot (4%).
Docker
566 26%
Git
277 13%
Claude Code
91 4%
Copilot
86 4%
Jenkins
64 3%
GraphQL
38 2%
Terraform
36 2%
Show all (67)
And 27 more, each named in fewer postings.
What AI and ML technologies does Capital One use?
LLM is named in 12% of job postings at Capital One, followed by Claude (5%), Gemini (3%), Core ML (1%).
LLM
258 12%
Claude
100 5%
Gemini
70 3%
Core ML
18 1%
VLM
10 <1%
ChatGPT
9 <1%
BERT
1 <1%
Llama
1 <1%
Show all (12)
Which engineering practices does Capital One ask for?
Machine Learning is named in 39% of job postings at Capital One, followed by CI/CD (20%), AI Agents (16%), LLM Guardrails (9%).
CI/CD
437 20%
AI Agents
350 16%
Time Series
121 6%
Fine-tuning
74 3%
Explainable AI
73 3%
Show all (81)
And 41 more, each named in fewer postings.
What other technologies does Capital One use?
VSAM is named in <1% of job postings at Capital One, followed by Kotlin Coroutines (<1%).
Kotlin Coroutines
3 <1%
What does each Capital One team work with?
The technologies each team's postings require most often, with the number of postings that require them.
Backend
657 postingsAI/ML
286 postingsData Science
244 postingsProduct
169 postingsAnalytics
104 postingsFinance
100 postingsHow does your stack fit Capital One?
How much does Capital One pay by technology?
Median stated pay of the postings that name each technology, against the median of all Capital One postings with stated pay: $225k across 1,991 postings.
| Technology | Postings with pay | Median | vs company median |
|---|---|---|---|
| AWS | 1465 | $225k | 0% |
| Python | 1332 | $225k | 0% |
| GCP | 1091 | $225k | 0% |
| Azure | 1090 | $225k | 0% |
| Scala | 833 | $225k | 0% |
| SQL | 704 | $225k | 0% |
| JavaScript | 673 | $225k | 0% |
| TypeScript | 592 | $225k | 0% |
| Kubernetes | 592 | $225k | 0% |
| Java | 457 | $239k | +6% |
How is the Capital One 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 Capital One stack?
Capital One scores 78 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: 12; legacy ones: 1.
How common is the Capital One stack in its industry?
Share of the 1,333 companies in the same industries, whose stack Alion knows, that use each technology.
What sets Capital One apart
Companies with a stack like Capital One
J.P. Morgan Workplace Solutions
277 shared technologies
Grab
226 shared technologies
Barclays
250 shared technologies
State Street
255 shared technologies
Workday
231 shared technologies
UnitedHealth Group
275 shared technologies
Brillio
239 shared technologies
American Express
233 shared technologies
Questions about the Capital One tech stack
What programming languages does Capital One use?
The languages named in Capital One job postings are Python (65%), Scala (39%), SQL (34%), JavaScript (33%), TypeScript (29%), as a share of the 2,181 postings of the last 12 months.
Does Capital One use PyTorch?
Yes. PyTorch is named in 309 of 2,181 job postings (14%) and required in 274 of them.
What cloud and platforms does Capital One use?
The cloud and platforms named in Capital One job postings are AWS (1577), GCP (1150), Azure (1147) (postings in brackets).
What skills do you need for a Backend job at Capital One?
Backend postings at Capital One most often require AWS (629), Azure (594), GCP (594), Python (528), out of 657 postings in the last 12 months.
Is the Capital One tech stack changing?
Yes. Sentry, CMMC, GraphRAG, WebSockets first appeared in Capital One job postings in the last six months.
How modern is the Capital One tech stack?
Capital One scores 78 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: 12; legacy ones: 1.
How does Alion know the Capital One tech stack?
Alion reads every job posting Capital One publishes and tags the technologies each one names. The figures on this page count the 2,181 postings of the last 12 months and were updated on Nov 12, 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, "Capital One tech stack: 362 technologies from 2,181 job postings", as of Nov 12, 2026. https://alion.io/company/capitalone/technologies