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 728 of the 1,770 job postings Citi published in the last 12 months (41%). Counted by Alion from the job postings of Citi, updated Sep 26, 2026.
What programming languages does Citi use?
SQL is named in 41% of job postings at Citi, followed by Java (41%), Python (39%), JavaScript (22%).
SQL
728 41%
Java
725 41%
Python
690 39%
JavaScript
385 22%
TypeScript
306 17%
Kotlin
80 5%
Node JS
61 3%
C#
58 3%
Show all (36)
What frameworks and libraries does Citi use?
Spring Boot is named in 19% of job postings at Citi, followed by Angular (15%), React.js (9%), LangChain (6%).
Spring Boot
341 19%
Angular
257 15%
React.js
163 9%
LangChain
108 6%
Spring Framework
98 6%
Hadoop
79 4%
LangGraph
75 4%
Hibernate
72 4%
Show all (138)
And 98 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 (5%), MS SQL (3%).
Oracle
229 13%
PostgreSQL
121 7%
Redis
84 5%
MS SQL
59 3%
Cassandra
45 3%
Snowflake
41 2%
MySQL
37 2%
MongoDB
31 2%
Show all (39)
What cloud and platforms does Citi use?
Kubernetes is named in 28% of job postings at Citi, followed by Apache Kafka (22%), OpenShift (18%), AWS (18%).
Kubernetes
492 28%
Apache Kafka
388 22%
OpenShift
320 18%
AWS
313 18%
GCP
193 11%
Spark
168 9%
Show all (105)
And 65 more, each named in fewer postings.
What developer tools does Citi use?
Docker is named in 24% of job postings at Citi, followed by Jenkins (15%), Git (14%), Copilot (10%).
Docker
416 24%
Jenkins
257 15%
Git
245 14%
Copilot
171 10%
Rest API
133 8%
pySpark
89 5%
Show all (119)
And 79 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 (6%), 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 (15%), Machine Learning (12%), RAG (10%).
CI/CD
622 35%
AI Agents
262 15%
RAG
170 10%
Prompt Engineering
161 9%
NLP
65 4%
SLI/SLO/SLA
64 4%
Show all (108)
And 68 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%).
ZkSync Era 
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
500 postingsAnalytics
370 postingsLeadership
214 postingsAI/ML
122 postingsFinance
88 postingsData Science
71 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: $172k across 671 postings.
| Technology | Postings with pay | Median | vs company median |
|---|---|---|---|
| Java | 308 | $171k | −1% |
| Python | 259 | $171k | −1% |
| SQL | 253 | $171k | −1% |
| Kubernetes | 225 | $171k | −1% |
| Apache Kafka | 176 | $171k | −1% |
| JavaScript | 167 | $171k | −1% |
| Spring Boot | 143 | $171k | −1% |
| AWS | 139 | $189k | +10% |
| OpenShift | 134 | $171k | −1% |
| TypeScript | 131 | $171k | −1% |
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 675 companies in the same industries, whose stack Alion knows, that use each technology.
Companies with a stack like Citi
Questions about the Citi tech stack
What programming languages does Citi use?
The languages named in Citi job postings are SQL (41%), Java (41%), Python (39%), JavaScript (22%), TypeScript (17%), as a share of the 1,770 postings of the last 12 months.
Does Citi use Spring Boot?
Yes. Spring Boot is named in 341 of 1,770 job postings (19%) and required in 321 of them.
What cloud and platforms does Citi use?
The cloud and platforms named in Citi job postings are Kubernetes (492), Apache Kafka (388), OpenShift (320) (postings in brackets).
What skills do you need for a Backend job at Citi?
Backend postings at Citi most often require Java (372), Spring Boot (227), SQL (207), Apache Kafka (197), out of 500 postings in the last 12 months.
Is the Citi tech stack changing?
No new technology has 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 1,770 postings of the last 12 months and were updated on Sep 26, 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: 566 technologies from 1,770 job postings", as of Sep 26, 2026. https://alion.io/company/citi/technologies