Barclays tech stack
Barclays builds mostly with Python, SQL, Java, JavaScript. Its stack also includes AWS, Kubernetes, Spring Boot, React.js. Python is named in 426 of the 1,040 job postings Barclays published in the last 12 months (41%). Counted by Alion from the job postings of Barclays, updated Nov 11, 2026.
What programming languages does Barclays use?
Python is named in 41% of job postings at Barclays, followed by SQL (34%), Java (31%), JavaScript (16%).
Python
426 41%
SQL
353 34%
Java
320 31%
JavaScript
164 16%
TypeScript
112 11%
C++
49 5%
PowerShell
44 4%
Kotlin
39 4%
Show all (31)
What frameworks and libraries does Barclays use?
Spring Boot is named in 13% of job postings at Barclays, followed by React.js (8%), Angular (7%), Selenium (5%).
Spring Boot
132 13%
React.js
80 8%
Angular
69 7%
Selenium
51 5%
LangChain
47 5%
LangGraph
33 3%
JUnit
32 3%
Playwright
31 3%
Show all (104)
And 64 more, each named in fewer postings.
What databases does Barclays use?
Oracle is named in 6% of job postings at Barclays, followed by PostgreSQL (5%), Snowflake (5%), MS SQL (4%).
Oracle
61 6%
PostgreSQL
55 5%
Snowflake
54 5%
MS SQL
40 4%
DynamoDB
21 2%
MySQL
18 2%
Amazon Redshift
17 2%
Db2
15 1%
Show all (27)
What cloud and platforms does Barclays use?
AWS is named in 37% of job postings at Barclays, followed by Kubernetes (23%), GitLab (18%), Azure (17%).
AWS
384 37%
Kubernetes
242 23%
GitLab
188 18%
Azure
172 17%
Apache Kafka
146 14%
OpenShift
97 9%
Databricks
84 8%
Show all (103)
And 63 more, each named in fewer postings.
What developer tools does Barclays use?
Docker is named in 16% of job postings at Barclays, followed by Jenkins (14%), Rest API (13%), Git (10%).
Docker
168 16%
Jenkins
147 14%
Rest API
130 13%
Git
101 10%
Terraform
76 7%
CloudFormation
69 7%
Ansible
58 6%
Maven
57 5%
Show all (83)
And 43 more, each named in fewer postings.
What AI and ML technologies does Barclays use?
LLM is named in 5% of job postings at Barclays, followed by Claude (3%), LoRA (1%), PEFT (1%).
Which engineering practices does Barclays ask for?
CI/CD is named in 38% of job postings at Barclays, followed by Machine Learning (20%), Incident Management (11%), AI Agents (9%).
CI/CD
394 38%
Incident Management
112 11%
AI Agents
95 9%
RAG
52 5%
Platform Engineering
46 4%
Show all (80)
And 40 more, each named in fewer postings.
What other technologies does Barclays use?
VSAM is named in 1% of job postings at Barclays, followed by Ethereum (1%), Kotlin Coroutines (<1%), Solana (<1%).
What does each Barclays team work with?
The technologies each team's postings require most often, with the number of postings that require them.
Backend
220 postingsData Science
95 postingsDevOps
93 postingsAnalytics
93 postingsProduct
71 postingsFinance
64 postingsHow does your stack fit Barclays?
How much does Barclays pay by technology?
Median stated pay of the postings that name each technology, against the median of all Barclays postings with stated pay: $153k across 126 postings.
| Technology | Postings with pay | Median | vs company median |
|---|---|---|---|
| Python | 50 | $135k | −12% |
| Java | 41 | $170k | +11% |
| AWS | 39 | $125k | −18% |
| SQL | 32 | $115k | −25% |
| Kubernetes | 22 | $165k | +8% |
| Apache Kafka | 18 | $170k | +11% |
| JavaScript | 17 | $170k | +11% |
| Azure | 17 | $120k | −21% |
| Windows | 16 | $115k | −25% |
| Spring Boot | 15 | $166k | +9% |
How is the Barclays 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 Barclays stack?
Barclays 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: 6; legacy ones: 1.
How common is the Barclays stack in its industry?
Share of the 1,968 companies in the same industries, whose stack Alion knows, that use each technology.
What sets Barclays apart
Companies with a stack like Barclays
Questions about the Barclays tech stack
What programming languages does Barclays use?
The languages named in Barclays job postings are Python (41%), SQL (34%), Java (31%), JavaScript (16%), TypeScript (11%), as a share of the 1,040 postings of the last 12 months.
Does Barclays use Spring Boot?
Yes. Spring Boot is named in 132 of 1,040 job postings (13%) and required in 128 of them.
What cloud and platforms does Barclays use?
The cloud and platforms named in Barclays job postings are AWS (384), Kubernetes (242), GitLab (188) (postings in brackets).
What skills do you need for a Backend job at Barclays?
Backend postings at Barclays most often require Java (140), Spring Boot (104), Kubernetes (96), AWS (91), out of 220 postings in the last 12 months.
Is the Barclays tech stack changing?
Yes. Progressive Delivery, Dagger, Hilt, Kotlin Coroutines first appeared in Barclays job postings in the last six months.
How modern is the Barclays tech stack?
Barclays 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: 6; legacy ones: 1.
How does Alion know the Barclays tech stack?
Alion reads every job posting Barclays publishes and tags the technologies each one names. The figures on this page count the 1,040 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, "Barclays tech stack: 439 technologies from 1,040 job postings", as of Nov 11, 2026. https://alion.io/company/barclays-uk/technologies