Coolblue tech stack
Coolblue builds mostly with JavaScript, C#, Python, TypeScript. Its stack also includes AWS, React.js, .NET, Next.js. JavaScript is named in 24 of the 35 job postings Coolblue published in the last 12 months (69%). Counted by Alion from the job postings of Coolblue, updated Nov 12, 2026.
What programming languages does Coolblue use?
JavaScript is named in 69% of job postings at Coolblue, followed by C# (23%), Python (20%), TypeScript (20%).
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What frameworks and libraries does Coolblue use?
React.js is named in 20% of job postings at Coolblue, followed by Next.js (11%), Combine (3%), LangChain (3%).
React.js
7 20%
Next.js
4 11%
Combine
1 3%
LangChain
1 3%
Rest-Assured
1 3%
SwiftUI
1 3%
UIKit
1 3%
XCTest
1 3%
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What databases does Coolblue use?
DynamoDB is named in 9% of job postings at Coolblue, followed by Google BigQuery (6%), MySQL (6%), PostgreSQL (6%).
What cloud and platforms does Coolblue use?
AWS is named in 20% of job postings at Coolblue, followed by .NET (17%), GitHub (17%), Azure (9%).
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What developer tools does Coolblue use?
Git is named in 9% of job postings at Coolblue, followed by GraphQL (6%), dbt (6%), Bitrise (3%).
What AI and ML technologies does Coolblue use?
ChatGPT is named in 3% of job postings at Coolblue, followed by LLM (3%).
Which engineering practices does Coolblue ask for?
CI/CD is named in 40% of job postings at Coolblue, followed by Clean Architecture (6%), Machine Learning (6%), AI Agents (3%).
What other technologies does Coolblue use?
Swift Concurrency is named in 3% of job postings at Coolblue.
Swift Concurrency
1 3%
What does each Coolblue team work with?
The technologies each team's postings require most often, with the number of postings that require them.
Backend
5 postingsFrontend
4 postingsDevOps
3 postingsHow does your stack fit Coolblue?
How is the Coolblue 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 Coolblue stack?
Coolblue scores 83 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: 2; legacy ones: 0.
How common is the Coolblue stack in its industry?
Share of the 1,251 companies in the same industries, whose stack Alion knows, that use each technology.
What sets Coolblue apart
Companies with a stack like Coolblue
Questions about the Coolblue tech stack
What programming languages does Coolblue use?
The languages named in Coolblue job postings are JavaScript (69%), C# (23%), Python (20%), TypeScript (20%), Node JS (14%), as a share of the 35 postings of the last 12 months.
Does Coolblue use React.js?
Yes. React.js is named in 7 of 35 job postings (20%) and required in 6 of them.
What cloud and platforms does Coolblue use?
The cloud and platforms named in Coolblue job postings are AWS (7), .NET (6), GitHub (6) (postings in brackets).
What skills do you need for a Backend job at Coolblue?
Backend postings at Coolblue most often require AWS (3), C# (3), DynamoDB (3), .NET (2), out of 5 postings in the last 12 months.
Is the Coolblue tech stack changing?
Yes. Next.js, Sass, Node JS, Machine Learning first appeared in Coolblue job postings in the last six months.
How modern is the Coolblue tech stack?
Coolblue scores 83 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: 2; legacy ones: 0.
How does Alion know the Coolblue tech stack?
Alion reads every job posting Coolblue publishes and tags the technologies each one names. The figures on this page count the 35 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, "Coolblue tech stack: 51 technologies from 35 job postings", as of Nov 12, 2026. https://alion.io/company/coolblue/technologies