# Coolblue - **Answer**: 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 13, 2026. - **Window days**: 365 - **Postings analysed**: 35 - **Open postings**: 5 - **Technologies in use**: 51 - **Modernity score**: 83 - **Ai adoption**: yes - **License**: CC BY-SA 4.0 ## Company - **Id**: 54499 - **Name**: Coolblue - **Domain**: coolblue.nl - **Url**: ## Technologies - **JavaScript** — Layer: languages; Postings: 24; Share: 0.6857; Required: 6; Open postings: 5; First seen: 2025-08-18 - **CI/CD** — Layer: practices; Postings: 14; Share: 0.4; Required: 13; Open postings: 0; First seen: 2026-02-27 - **C#** — Layer: languages; Postings: 8; Share: 0.2286; Required: 8; Open postings: 0; First seen: 2026-02-27 - **Python** — Layer: languages; Postings: 7; Share: 0.2; Required: 7; Open postings: 0; First seen: 2025-08-18 - **TypeScript** — Layer: languages; Postings: 7; Share: 0.2; Required: 7; Open postings: 0; First seen: 2026-02-27 - **AWS** — Layer: cloud; Postings: 7; Share: 0.2; Required: 6; Open postings: 0; First seen: 2025-08-18 - **React.js** — Layer: frameworks; Postings: 7; Share: 0.2; Required: 6; Open postings: 0; First seen: 2026-05-12 - **.NET** — Layer: cloud; Postings: 6; Share: 0.1714; Required: 6; Open postings: 0; First seen: 2026-05-12 - **GitHub** — Layer: cloud; Postings: 6; Share: 0.1714; Required: 6; Open postings: 0; First seen: 2026-05-12 - **Node JS** — Layer: languages; Postings: 5; Share: 0.1429; Required: 5; Open postings: 0; First seen: 2026-06-29 - **Next.js** — Layer: frameworks; Postings: 4; Share: 0.1143; Required: 4; Open postings: 0; First seen: 2026-09-21 - **Sass** — Layer: languages; Postings: 4; Share: 0.1143; Required: 4; Open postings: 0; First seen: 2026-09-21 - **Azure** — Layer: cloud; Postings: 3; Share: 0.0857; Required: 3; Open postings: 0; First seen: 2026-02-27 - **Datadog** — Layer: cloud; Postings: 3; Share: 0.0857; Required: 3; Open postings: 0; First seen: 2025-08-18 - **DynamoDB** — Layer: data; Postings: 3; Share: 0.0857; Required: 3; Open postings: 0; First seen: 2026-05-12 - **GCP** — Layer: cloud; Postings: 3; Share: 0.0857; Required: 3; Open postings: 0; First seen: 2026-02-27 - **Git** — Layer: tools; Postings: 3; Share: 0.0857; Required: 3; Open postings: 0; First seen: 2026-02-27 - **SQL** — Layer: languages; Postings: 3; Share: 0.0857; Required: 3; Open postings: 0; First seen: 2025-08-18 - **Clean Architecture** — Layer: practices; Postings: 2; Share: 0.0571; Required: 2; Open postings: 0; First seen: 2026-05-12 - **Google BigQuery** — Layer: data; Postings: 2; Share: 0.0571; Required: 2; Open postings: 0; First seen: 2025-08-26 - **GraphQL** — Layer: tools; Postings: 2; Share: 0.0571; Required: 2; Open postings: 0; First seen: 2026-05-12 - **Looker** — Layer: cloud; Postings: 2; Share: 0.0571; Required: 2; Open postings: 0; First seen: 2025-08-26 - **Machine Learning** — Layer: practices; Postings: 2; Share: 0.0571; Required: 2; Open postings: 0; First seen: 2026-06-09 - **MySQL** — Layer: data; Postings: 2; Share: 0.0571; Required: 2; Open postings: 0; First seen: 2026-05-12 - **PostgreSQL** — Layer: data; Postings: 2; Share: 0.0571; Required: 2; Open postings: 0; First seen: 2026-05-12 - **Snowflake** — Layer: data; Postings: 2; Share: 0.0571; Required: 2; Open postings: 0; First seen: 2026-06-09 - **TeamCity** — Layer: cloud; Postings: 2; Share: 0.0571; Required: 2; Open postings: 0; First seen: 2026-05-12 - **dbt** — Layer: tools; Postings: 2; Share: 0.0571; Required: 2; Open postings: 0; First seen: 2025-08-26 - **PHP** — Layer: languages; Postings: 2; Share: 0.0571; Required: 1; Open postings: 0; First seen: 2026-05-12 - **AI Agents** — Layer: practices; Postings: 1; Share: 0.0286; Required: 1; Open postings: 0; First seen: 2026-04-14 - **AWS Lambda** — Layer: cloud; Postings: 1; Share: 0.0286; Required: 1; Open postings: 0; First seen: 2026-06-29 - **Amazon S3** — Layer: cloud; Postings: 1; Share: 0.0286; Required: 1; Open postings: 0; First seen: 2025-08-18 - **Anthropic** — Layer: cloud; Postings: 1; Share: 0.0286; Required: 1; Open postings: 0; First seen: 2026-04-14 - **Bitrise** — Layer: tools; Postings: 1; Share: 0.0286; Required: 1; Open postings: 0; First seen: 2026-08-24 - **ChatGPT** — Layer: ai; Postings: 1; Share: 0.0286; Required: 1; Open postings: 0; First seen: 2026-04-14 - **Combine** — Layer: frameworks; Postings: 1; Share: 0.0286; Required: 1; Open postings: 0; First seen: 2026-08-24 - **Informatica** — Layer: tools; Postings: 1; Share: 0.0286; Required: 1; Open postings: 0; First seen: 2026-08-26 - **Kotlin** — Layer: languages; Postings: 1; Share: 0.0286; Required: 1; Open postings: 0; First seen: 2026-08-24 - **LLM** — Layer: ai; Postings: 1; Share: 0.0286; Required: 1; Open postings: 0; First seen: 2026-04-14 - **LangChain** — Layer: frameworks; Postings: 1; Share: 0.0286; Required: 1; Open postings: 0; First seen: 2026-04-14 - **MVVM** — Layer: practices; Postings: 1; Share: 0.0286; Required: 1; Open postings: 0; First seen: 2026-08-24 - **OpenAI** — Layer: cloud; Postings: 1; Share: 0.0286; Required: 1; Open postings: 0; First seen: 2026-04-14 - **Rest API** — Layer: tools; Postings: 1; Share: 0.0286; Required: 1; Open postings: 0; First seen: 2026-10-13 - **Rest-Assured** — Layer: frameworks; Postings: 1; Share: 0.0286; Required: 1; Open postings: 0; First seen: 2026-02-27 - **Swift** — Layer: languages; Postings: 1; Share: 0.0286; Required: 1; Open postings: 0; First seen: 2026-08-24 - **Swift Concurrency** — Layer: other; Postings: 1; Share: 0.0286; Required: 1; Open postings: 0; First seen: 2026-08-24 - **Swift Testing** — Layer: tools; Postings: 1; Share: 0.0286; Required: 1; Open postings: 0; First seen: 2026-08-24 - **SwiftUI** — Layer: frameworks; Postings: 1; Share: 0.0286; Required: 1; Open postings: 0; First seen: 2026-08-24 - **UIKit** — Layer: frameworks; Postings: 1; Share: 0.0286; Required: 1; Open postings: 0; First seen: 2026-08-24 - **XCTest** — Layer: frameworks; Postings: 1; Share: 0.0286; Required: 1; Open postings: 0; First seen: 2026-08-24 - … 1 more in the JSON form ## Changes ### First appeared - **Next.js** — First seen: 2026-09-21 - **Sass** — First seen: 2026-09-21 - **Node JS** — First seen: 2026-06-29 - **Machine Learning** — First seen: 2026-06-09 - **Snowflake** — First seen: 2026-06-09 ### Rising - **CI/CD** — Share from: 18; Share to: 50 - **C#** — Share from: 0; Share to: 28 - **React.js** — Share from: 0; Share to: 28 - **.NET** — Share from: 0; Share to: 28 - **GitHub** — Share from: 0; Share to: 28 - **Next.js** — Share from: 0; Share to: 22 - **Sass** — Share from: 0; Share to: 22 - **TypeScript** — Share from: 9; Share to: 22 ## Similar stacks - [Xebia](https://alion.io/company/xebia/technologies) — Shared technologies: 43 - [AgileEngine](https://alion.io/company/agileengine/technologies) — Shared technologies: 43 - [Just Eat Takeaway.com](https://alion.io/company/just-eat-takeaway-com/technologies) — Shared technologies: 42 - [B3 Consulting Group](https://alion.io/company/b3group/technologies) — Shared technologies: 46 - [Inter&Co](https://alion.io/company/banco-inter/technologies) — Shared technologies: 46 - [Qentelli](https://alion.io/company/qentelli/technologies) — Shared technologies: 44 - [BRQ Digital Solutions](https://alion.io/company/brq-digital-solutions/technologies) — Shared technologies: 50 - [Multiplica](https://alion.io/company/multiplica/technologies) — Shared technologies: 42 --- [Page](https://alion.io/company/coolblue/technologies) · [JSON](https://alion.io/company/coolblue/technologies.json) Source: Alion (alion.io), 2026-11-13. 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