Citi tech stack
Citi builds mostly with SQL, Java, Python, JavaScript. Its stack also includes Kubernetes, Apache Kafka, Spring Boot, Angular. SQL is named in 1,265 of the 2,982 job postings Citi published in the last 12 months (42%). Counted by Alion from the job postings of Citi, updated Nov 11, 2026.
What programming languages does Citi use?
SQL is named in 42% of job postings at Citi, followed by Java (42%), Python (39%), JavaScript (21%).
SQL
1265 42%
Java
1254 42%
Python
1169 39%
JavaScript
640 21%
TypeScript
534 18%
Kotlin
150 5%
C#
122 4%
SAS
117 4%
Show all (38)
What frameworks and libraries does Citi use?
Spring Boot is named in 19% of job postings at Citi, followed by Angular (15%), React.js (8%), Spring Framework (7%).
Spring Boot
552 19%
Angular
445 15%
React.js
247 8%
Spring Framework
195 7%
LangChain
168 6%
Hadoop
132 4%
JUnit
125 4%
Hibernate
114 4%
Show all (158)
And 118 more, each named in fewer postings.
What databases does Citi use?
Oracle is named in 13% of job postings at Citi, followed by PostgreSQL (7%), Redis (4%), MS SQL (4%).
Oracle
373 13%
PostgreSQL
209 7%
Redis
131 4%
MS SQL
126 4%
Snowflake
73 2%
MySQL
64 2%
Cassandra
56 2%
MongoDB
49 2%
Show all (41)
And 1 more, each named in fewer postings.
What cloud and platforms does Citi use?
Kubernetes is named in 27% of job postings at Citi, followed by Apache Kafka (23%), OpenShift (18%), AWS (17%).
Kubernetes
815 27%
Apache Kafka
681 23%
OpenShift
551 18%
AWS
512 17%
GCP
310 10%
Spark
300 10%
Show all (118)
And 78 more, each named in fewer postings.
What developer tools does Citi use?
Docker is named in 23% of job postings at Citi, followed by Jenkins (14%), Git (14%), Rest API (11%).
Docker
684 23%
Jenkins
427 14%
Git
406 14%
Rest API
332 11%
Copilot
310 10%
pySpark
167 6%
Show all (145)
And 105 more, each named in fewer postings.
What AI and ML technologies does Citi use?
LLM is named in 8% of job postings at Citi, followed by Claude (5%), Gemini (2%), Llama (1%).
Show all (14)
Which engineering practices does Citi ask for?
CI/CD is named in 35% of job postings at Citi, followed by AI Agents (14%), Machine Learning (11%), Prompt Engineering (9%).
CI/CD
1052 35%
AI Agents
421 14%
Prompt Engineering
270 9%
RAG
245 8%
NLP
93 3%
Show all (112)
And 72 more, each named in fewer postings.
What other technologies does Citi use?
VSAM is named in <1% of job postings at Citi, followed by Ethereum (<1%), Solana (<1%), Optimism (<1%).
Ethereum
9 <1%
Solana
3 <1%
Optimism
3 <1%
Polygon
3 <1%
ZkSync Era
3 <1%
Kotlin Coroutines
2 <1%
Bitcoin
1 <1%
Show all (9)
What does each Citi team work with?
The technologies each team's postings require most often, with the number of postings that require them.
Backend
907 postingsAnalytics
552 postingsLeadership
295 postingsAI/ML
179 postingsFinance
158 postingsData Science
144 postingsHow does your stack fit Citi?
How much does Citi pay by technology?
Median stated pay of the postings that name each technology, against the median of all Citi postings with stated pay: $171k across 1,089 postings.
| Technology | Postings with pay | Median | vs company median |
|---|---|---|---|
| Java | 496 | $161k | −6% |
| Python | 421 | $171k | 0% |
| SQL | 400 | $156k | −9% |
| Kubernetes | 355 | $171k | 0% |
| Apache Kafka | 281 | $171k | 0% |
| JavaScript | 270 | $153k | −10% |
| AWS | 229 | $188k | +10% |
| OpenShift | 227 | $161k | −6% |
| TypeScript | 224 | $145k | −15% |
| Spring Boot | 222 | $161k | −6% |
How is the Citi 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 Citi stack?
Citi scores 76 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: 14; legacy ones: 2.
How common is the Citi stack in its industry?
Share of the 2,837 companies in the same industries, whose stack Alion knows, that use each technology.
What sets Citi apart
Companies with a stack like Citi
JPMorganChase
488 shared technologies
Barclays
386 shared technologies
J.P. Morgan Workplace Solutions
416 shared technologies
Photon
413 shared technologies
NTT DATA
483 shared technologies
Cognizant
450 shared technologies
UnitedHealth Group
414 shared technologies
Mastercard
385 shared technologies
Questions about the Citi tech stack
What programming languages does Citi use?
The languages named in Citi job postings are SQL (42%), Java (42%), Python (39%), JavaScript (21%), TypeScript (18%), as a share of the 2,982 postings of the last 12 months.
Does Citi use Spring Boot?
Yes. Spring Boot is named in 552 of 2,982 job postings (19%) and required in 523 of them.
What cloud and platforms does Citi use?
The cloud and platforms named in Citi job postings are Kubernetes (815), Apache Kafka (681), OpenShift (551) (postings in brackets).
What skills do you need for a Backend job at Citi?
Backend postings at Citi most often require Java (641), Spring Boot (394), SQL (374), Apache Kafka (345), out of 907 postings in the last 12 months.
Is the Citi tech stack changing?
Yes. FigJam, InfiniBand, Fortify, JFrog Xray first appeared in Citi job postings in the last six months.
How modern is the Citi tech stack?
Citi scores 76 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: 14; legacy ones: 2.
How does Alion know the Citi tech stack?
Alion reads every job posting Citi publishes and tags the technologies each one names. The figures on this page count the 2,982 postings of the last 12 months and were updated on Nov 11, 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, "Citi tech stack: 635 technologies from 2,982 job postings", as of Nov 11, 2026. https://alion.io/company/citi/technologies