RELX tech stack
RELX builds mostly with Python, SQL, JavaScript, Java. Its stack also includes AWS, Azure, Snowflake, Spring Boot. Python is named in 202 of the 641 job postings RELX published in the last 12 months (32%). Counted by Alion from the job postings of RELX, updated Nov 12, 2026.
What programming languages does RELX use?
Python is named in 32% of job postings at RELX, followed by SQL (28%), JavaScript (15%), Java (11%).
Python
202 32%
SQL
182 28%
JavaScript
97 15%
Java
68 11%
C#
53 8%
TypeScript
40 6%
C++
35 5%
PowerShell
24 4%
Show all (24)
What frameworks and libraries does RELX use?
Spring Boot is named in 4% of job postings at RELX, followed by LangChain (4%), React.js (3%), PyTorch (3%).
Spring Boot
27 4%
LangChain
23 4%
React.js
21 3%
PyTorch
18 3%
LangGraph
15 2%
TensorFlow
14 2%
Playwright
12 2%
Angular
11 2%
Show all (73)
And 33 more, each named in fewer postings.
What databases does RELX use?
Snowflake is named in 5% of job postings at RELX, followed by PostgreSQL (3%), Oracle (2%), OpenSearch (2%).
Snowflake
31 5%
PostgreSQL
19 3%
Oracle
16 2%
OpenSearch
15 2%
MS SQL
14 2%
ElasticSearch
13 2%
MySQL
9 1%
DynamoDB
8 1%
Show all (28)
What cloud and platforms does RELX use?
AWS is named in 25% of job postings at RELX, followed by Azure (20%), Kubernetes (12%), Power BI (10%).
AWS
160 25%
Azure
127 20%
Kubernetes
76 12%
Power BI
61 10%
GitHub Actions
52 8%
Tableau
50 8%
GitHub
45 7%
Show all (85)
And 45 more, each named in fewer postings.
What developer tools does RELX use?
Terraform is named in 11% of job postings at RELX, followed by Microsoft Excel (10%), Docker (9%), Copilot (8%).
Terraform
69 11%
Docker
59 9%
Copilot
54 8%
Git
40 6%
Rest API
35 5%
Jenkins
23 4%
Model Context Protocol
23 4%
Show all (85)
And 45 more, each named in fewer postings.
What AI and ML technologies does RELX use?
LLM is named in 15% of job postings at RELX, followed by Claude (6%), ChatGPT (5%), GPT-4 (<1%).
Show all (9)
Which engineering practices does RELX ask for?
CI/CD is named in 22% of job postings at RELX, followed by Machine Learning (18%), AI Agents (15%), RAG (11%).
CI/CD
142 22%
AI Agents
93 15%
RAG
70 11%
NLP
47 7%
Prompt Engineering
38 6%
Embeddings
32 5%
Show all (71)
And 31 more, each named in fewer postings.
What does each RELX team work with?
The technologies each team's postings require most often, with the number of postings that require them.
Backend
102 postingsData Science
66 postingsAnalytics
60 postingsProduct
46 postingsLegal
46 postingsAI/ML
36 postingsHow does your stack fit RELX?
How much does RELX pay by technology?
Median stated pay of the postings that name each technology, against the median of all RELX postings with stated pay: $159k across 269 postings.
| Technology | Postings with pay | Median | vs company median |
|---|---|---|---|
| Python | 86 | $159k | 0% |
| SQL | 73 | $144k | −9% |
| Azure | 58 | $152k | −5% |
| AWS | 58 | $144k | −9% |
| LLM | 46 | $175k | +10% |
| JavaScript | 35 | $144k | −9% |
| Kubernetes | 34 | $159k | 0% |
| Windows | 27 | $131k | −17% |
| Java | 26 | $144k | −9% |
| Linux | 24 | $119k | −25% |
How is the RELX 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 RELX stack?
RELX 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: 9; legacy ones: 0.
How common is the RELX stack in its industry?
Share of the 1,332 companies in the same industries, whose stack Alion knows, that use each technology.
What sets RELX apart
Companies with a stack like RELX
Questions about the RELX tech stack
What programming languages does RELX use?
The languages named in RELX job postings are Python (32%), SQL (28%), JavaScript (15%), Java (11%), C# (8%), as a share of the 641 postings of the last 12 months.
Does RELX use Spring Boot?
Yes. Spring Boot is named in 27 of 641 job postings (4%) and required in 26 of them.
What cloud and platforms does RELX use?
The cloud and platforms named in RELX job postings are AWS (160), Azure (127), Kubernetes (76) (postings in brackets).
What skills do you need for a Backend job at RELX?
Backend postings at RELX most often require JavaScript (51), SQL (49), AWS (45), Python (34), out of 102 postings in the last 12 months.
Is the RELX tech stack changing?
Yes. Alteryx, OpenSSL, EU AI Act, Gearset first appeared in RELX job postings in the last six months.
How modern is the RELX tech stack?
RELX 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: 9; legacy ones: 0.
How does Alion know the RELX tech stack?
Alion reads every job posting RELX publishes and tags the technologies each one names. The figures on this page count the 641 postings of the last 12 months and were updated on Nov 12, 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, "RELX tech stack: 375 technologies from 641 job postings", as of Nov 12, 2026. https://alion.io/company/relx/technologies