Telefónica tech stack
Telefónica builds mostly with Python, SQL, JavaScript, PowerShell. Its stack also includes SIEM, GCP, MySQL, PostgreSQL. Python is named in 11 of the 40 job postings Telefónica published in the last 12 months (28%). Counted by Alion from the job postings of Telefónica, updated Sep 27, 2026.
What programming languages does Telefónica use?
Python is named in 28% of job postings at Telefónica, followed by SQL (20%), JavaScript (10%), PowerShell (10%).
C# 
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What frameworks and libraries does Telefónica use?
OpenTelemetry is named in 5% of job postings at Telefónica, followed by Angular (3%), CodeIgniter (3%), JQuery (3%).
OpenTelemetry
2 5%
Angular
1 3%
CodeIgniter
1 3%
JQuery
1 3%
Laravel
1 3%
React.js
1 3%
Symfony
1 3%
Vue.js
1 3%
What databases does Telefónica use?
MySQL is named in 5% of job postings at Telefónica, followed by PostgreSQL (5%), ElasticSearch (3%), MongoDB (3%).
What cloud and platforms does Telefónica use?
SIEM is named in 20% of job postings at Telefónica, followed by GCP (15%), Azure (15%), Linux (13%).
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What developer tools does Telefónica use?
Wireshark is named in 10% of job postings at Telefónica, followed by Rest API (8%), Tcpdump (8%), Terraform (8%).
Wireshark
4 10%
Rest API
3 8%
Tcpdump
3 8%
Terraform
3 8%
AutoCAD
3 8%
Hyper-V
3 8%
ArgoCD
2 5%
Docker
2 5%
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What AI and ML technologies does Telefónica use?
Claude is named in 5% of job postings at Telefónica, followed by ChatGPT (3%), Midjourney (3%), Stable Diffusion (3%).
Which engineering practices does Telefónica ask for?
SLI/SLO/SLA is named in 10% of job postings at Telefónica, followed by CI/CD (10%), Wi-Fi (8%), GitOps (5%).
SLI/SLO/SLA
4 10%
CI/CD
4 10%
GitOps
2 5%
Platform Engineering
2 5%
AI Agents
1 3%
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What does each Telefónica team work with?
The technologies each team's postings require most often, with the number of postings that require them.
Field & Service
11 postingsSecurity
5 postingsFinance
3 postingsDevOps
3 postingsHow does your stack fit Telefónica?
How modern is the Telefónica stack?
Telefónica scores 84 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: 4; legacy ones: 0.
Companies with a stack like Telefónica
Questions about the Telefónica tech stack
What programming languages does Telefónica use?
The languages named in Telefónica job postings are Python (28%), SQL (20%), JavaScript (10%), PowerShell (10%), C# (5%), as a share of the 40 postings of the last 12 months.
Does Telefónica use OpenTelemetry?
Yes. OpenTelemetry is named in 2 of 40 job postings (5%) and required in 2 of them.
What cloud and platforms does Telefónica use?
The cloud and platforms named in Telefónica job postings are SIEM (8), GCP (6), Azure (6) (postings in brackets).
What skills do you need for a Field & Service job at Telefónica?
Field & Service postings at Telefónica most often require Linux (4), SIEM (4), GCP (2), SQL (2), out of 11 postings in the last 12 months.
Is the Telefónica tech stack changing?
No new technology has appeared in Telefónica job postings in the last six months.
How modern is the Telefónica tech stack?
Telefónica scores 84 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: 4; legacy ones: 0.
How does Alion know the Telefónica tech stack?
Alion reads every job posting Telefónica publishes and tags the technologies each one names. The figures on this page count the 40 postings of the last 12 months and were updated on Sep 27, 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, "Telefónica tech stack: 112 technologies from 40 job postings", as of Sep 27, 2026. https://alion.io/company/telefonica/technologies