Top 100 JavaScript Development Companies in Spain

The Best of November 2026

Looking for a top JavaScript developer in Spain?

If you're hiring a JavaScript developer to help you build or update a website that's responsive and interactive, consider the pros and cons of JavaScript as a programming language. Advantages include its speed because it's executed on the client-side; reduction in server load; and diverse functionality. Disadvantages to consider include security such as bugs on the client-side.

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List of the Best Spain JavaScript Developers

181

Baufest

(3 Reviews) 4.7

Timeliness
4.3

Service Excellence
4.3

Value
4.2

Would Recommend
5.0

$100,000+

1,000 - 9,999 employees

Madrid, Spain

Baufest is a software development firm. The large Bellevue, Washington-based company was founded in 1991. Their team offers Custom Software Development, BI & big data consulting & SI, cloud consulting & SI, UX/UI Design, and more.
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182

Infograins Software Solutions

(89 Reviews) 4.9

Timeliness
4.9

Service Excellence
4.9

Value
4.9

Would Recommend
4.9

$5,000+

250 - 999 employees

Madrid, Spain

Infograins Software Solutions is a midsize Blockchain company launched in 2011. Their team offers Blockchain, Artificial Intelligence, Custom Software Development, Mobile App Development, and more. The firm is headquartered in New York, New York; Indore, India; London, England and Barangaroo, Australia.

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