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 308 of the 739 job postings Barclays published in the last 12 months (42%). Counted by Alion from the job postings of Barclays, updated Sep 26, 2026.
What programming languages does Barclays use?
Python is named in 42% of job postings at Barclays, followed by SQL (34%), Java (32%), JavaScript (16%).
Python
308 42%
SQL
248 34%
Java
234 32%
JavaScript
121 16%
TypeScript
87 12%
C++
43 6%
C#
31 4%
PowerShell
28 4%
Show all (31)
What frameworks and libraries does Barclays use?
Spring Boot is named in 14% of job postings at Barclays, followed by React.js (8%), Angular (7%), Selenium (5%).
Spring Boot
102 14%
React.js
61 8%
Angular
52 7%
Selenium
36 5%
LangChain
35 5%
Hadoop
24 3%
Spring Framework
23 3%
Hibernate
23 3%
Show all (88)
And 48 more, each named in fewer postings.
What databases does Barclays use?
Oracle is named in 7% of job postings at Barclays, followed by Snowflake (6%), PostgreSQL (5%), MS SQL (4%).
Oracle
50 7%
Snowflake
43 6%
PostgreSQL
35 5%
MS SQL
33 4%
Amazon Redshift
16 2%
DynamoDB
16 2%
MySQL
15 2%
Db2
12 2%
Show all (27)
What cloud and platforms does Barclays use?
AWS is named in 39% of job postings at Barclays, followed by Kubernetes (21%), GitLab (19%), Azure (18%).
AWS
289 39%
Kubernetes
157 21%
GitLab
139 19%
Azure
133 18%
Apache Kafka
111 15%
OpenShift
69 9%
Spark
69 9%
Show all (96)
And 56 more, each named in fewer postings.
What developer tools does Barclays use?
Jenkins is named in 16% of job postings at Barclays, followed by Docker (15%), Git (10%), Rest API (9%).
Jenkins
118 16%
Docker
109 15%
Git
72 10%
Rest API
67 9%
Terraform
53 7%
CloudFormation
51 7%
pySpark
36 5%
Ansible
36 5%
Show all (71)
And 31 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 39% of job postings at Barclays, followed by Machine Learning (20%), Incident Management (10%), AI Agents (9%).
CI/CD
287 39%
Incident Management
74 10%
AI Agents
65 9%
Platform Engineering
39 5%
RAG
35 5%
Show all (76)
And 36 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%), 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
146 postingsData Science
73 postingsDevOps
71 postingsAnalytics
64 postingsProduct
46 postingsAI/ML
43 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: $155k across 90 postings.
| Technology | Postings with pay | Median | vs company median |
|---|---|---|---|
| Python | 40 | $148k | −5% |
| Java | 32 | $170k | +10% |
| AWS | 27 | $125k | −19% |
| SQL | 23 | $144k | −7% |
| JavaScript | 13 | $170k | +10% |
| Apache Kafka | 13 | $170k | +10% |
| Kubernetes | 11 | $170k | +10% |
| Azure | 11 | $120k | −23% |
| Linux | 11 | $120k | −23% |
| Unix | 10 | $160k | +3% |
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 79 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 495 companies in the same industries, whose stack Alion knows, that use each technology.
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 (42%), SQL (34%), Java (32%), JavaScript (16%), TypeScript (12%), as a share of the 739 postings of the last 12 months.
Does Barclays use Spring Boot?
Yes. Spring Boot is named in 102 of 739 job postings (14%) and required in 98 of them.
What cloud and platforms does Barclays use?
The cloud and platforms named in Barclays job postings are AWS (289), Kubernetes (157), GitLab (139) (postings in brackets).
What skills do you need for a Backend job at Barclays?
Backend postings at Barclays most often require Java (104), Spring Boot (79), AWS (74), Apache Kafka (58), out of 146 postings in the last 12 months.
Is the Barclays tech stack changing?
Yes. A/B Testing, Cobalt Strike, Kubeflow, XGBoost first appeared in Barclays job postings in the last six months.
How modern is the Barclays tech stack?
Barclays scores 79 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 739 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, "Barclays tech stack: 398 technologies from 739 job postings", as of Sep 26, 2026. https://alion.io/company/barclays-uk/technologies