Coolblue tech stack
Coolblue builds mostly with JavaScript, C#, Python, TypeScript. Its stack also includes Immer, AWS, React.js, .NET. JavaScript is named in 21 of the 31 job postings Coolblue published in the last 12 months (68%). Counted by Alion from the job postings of Coolblue, updated Sep 27, 2026.
What programming languages does Coolblue use?
JavaScript is named in 68% of job postings at Coolblue, followed by C# (16%), Python (16%), TypeScript (16%).
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What frameworks and libraries does Coolblue use?
Immer is named in 52% of job postings at Coolblue, followed by React.js (13%), Next.js (6%), Combine (3%).
Immer
16 52%
React.js
4 13%
Next.js
2 6%
Combine
1 3%
LangChain
1 3%
Rest-Assured
1 3%
SwiftUI
1 3%
UIKit
1 3%
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What databases does Coolblue use?
DynamoDB is named in 6% of job postings at Coolblue, followed by BigQuery (3%), Google BigQuery (3%), MySQL (3%).
BigQuery 
What cloud and platforms does Coolblue use?
AWS is named in 16% of job postings at Coolblue, followed by .NET (10%), GitHub (10%), Azure (6%).
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What developer tools does Coolblue use?
Git is named in 6% of job postings at Coolblue, followed by Bitrise (3%), GraphQL (3%), Informatica (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 29% of job postings at Coolblue, followed by AI Agents (3%), Clean Architecture (3%), MVVM (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
4 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 81 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.
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 (68%), C# (16%), Python (16%), TypeScript (16%), Node JS (10%), as a share of the 31 postings of the last 12 months.
Does Coolblue use Immer?
Yes. Immer is named in 16 of 31 job postings (52%) and required in 16 of them.
What cloud and platforms does Coolblue use?
The cloud and platforms named in Coolblue job postings are AWS (5), .NET (3), GitHub (3) (postings in brackets).
What skills do you need for a Backend job at Coolblue?
Backend postings at Coolblue most often require AWS (2), C# (2), DynamoDB (2), TypeScript (2), out of 4 postings in the last 12 months.
Is the Coolblue tech stack changing?
Yes. Next.js, Sass, Node JS, Immer first appeared in Coolblue job postings in the last six months.
How modern is the Coolblue tech stack?
Coolblue scores 81 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 31 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, "Coolblue tech stack: 53 technologies from 31 job postings", as of Sep 27, 2026. https://alion.io/company/coolblue/technologies