RELX tech stack
RELX builds mostly with Python, SQL, JavaScript, Java. Its stack also includes AWS, Azure, Spring Boot, LangChain. Python is named in 133 of the 444 job postings RELX published in the last 12 months (30%). Counted by Alion from the job postings of RELX, updated Sep 27, 2026.
What programming languages does RELX use?
Python is named in 30% of job postings at RELX, followed by SQL (29%), JavaScript (16%), Java (11%).
Python
133 30%
SQL
129 29%
JavaScript
71 16%
Java
49 11%
TypeScript
34 8%
C#
33 7%
C++
23 5%
Node JS
16 4%
Show all (22)
What frameworks and libraries does RELX use?
Spring Boot is named in 5% of job postings at RELX, followed by LangChain (5%), React.js (3%), PyTorch (3%).
Spring Boot
20 5%
LangChain
20 5%
React.js
15 3%
PyTorch
15 3%
LangGraph
13 3%
TensorFlow
13 3%
Angular
10 2%
Scikit-learn
10 2%
Show all (66)
And 26 more, each named in fewer postings.
What databases does RELX use?
Snowflake is named in 4% of job postings at RELX, followed by OpenSearch (3%), PostgreSQL (3%), ElasticSearch (2%).
Snowflake
19 4%
OpenSearch
12 3%
PostgreSQL
12 3%
ElasticSearch
9 2%
MS SQL
9 2%
Oracle
8 2%
DynamoDB
5 1%
Amazon Aurora
4 1%
Show all (27)
What cloud and platforms does RELX use?
AWS is named in 26% of job postings at RELX, followed by Azure (19%), Kubernetes (11%), Power BI (9%).
AWS
115 26%
Azure
84 19%
Kubernetes
49 11%
Power BI
41 9%
Tableau
38 9%
GitHub
37 8%
Show all (80)
And 40 more, each named in fewer postings.
What developer tools does RELX use?
Terraform is named in 10% of job postings at RELX, followed by Docker (9%), Copilot (7%), Microsoft Excel (7%).
Terraform
43 10%
Docker
39 9%
Copilot
31 7%
Git
25 6%
Rest API
23 5%
Jenkins
18 4%
Model Context Protocol
15 3%
Show all (69)
And 29 more, each named in fewer postings.
What AI and ML technologies does RELX use?
LLM is named in 16% of job postings at RELX, followed by Claude (5%), ChatGPT (4%), GPT-4 (<1%).
Show all (9)
Which engineering practices does RELX ask for?
CI/CD is named in 23% of job postings at RELX, followed by Machine Learning (19%), AI Agents (16%), RAG (13%).
CI/CD
103 23%
AI Agents
71 16%
RAG
57 13%
NLP
38 9%
Prompt Engineering
33 7%
Embeddings
28 6%
Show all (68)
And 28 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
77 postingsData Science
47 postingsLegal
36 postingsAnalytics
33 postingsAI/ML
28 postingsProduct
25 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: $151k across 185 postings.
| Technology | Postings with pay | Median | vs company median |
|---|---|---|---|
| Python | 57 | $159k | +5% |
| SQL | 47 | $144k | −4% |
| AWS | 43 | $144k | −4% |
| Azure | 38 | $144k | −4% |
| LLM | 35 | $175k | +16% |
| JavaScript | 23 | $144k | −4% |
| Kubernetes | 21 | $144k | −4% |
| Windows | 21 | $131k | −13% |
| Java | 19 | $159k | +5% |
| Linux | 19 | $119k | −21% |
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 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: 9; legacy ones: 0.
How common is the RELX stack in its industry?
Share of the 448 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 (30%), SQL (29%), JavaScript (16%), Java (11%), TypeScript (8%), as a share of the 444 postings of the last 12 months.
Does RELX use Spring Boot?
Yes. Spring Boot is named in 20 of 444 job postings (5%) and required in 19 of them.
What cloud and platforms does RELX use?
The cloud and platforms named in RELX job postings are AWS (115), Azure (84), Kubernetes (49) (postings in brackets).
What skills do you need for a Backend job at RELX?
Backend postings at RELX most often require JavaScript (41), SQL (41), AWS (31), Java (22), out of 77 postings in the last 12 months.
Is the RELX tech stack changing?
Yes. Puppet, HashiCorp Vault, LoRA, PEFT first appeared in RELX job postings in the last six months.
How modern is the RELX tech stack?
RELX 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: 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 444 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, "RELX tech stack: 341 technologies from 444 job postings", as of Sep 27, 2026. https://alion.io/company/relx/technologies