288 open roles accept applicants living in Spain, based on the countries each platform publishes. The work is remote, and pay is published by the platform, usually in US dollars.
Pay figures cover the 268 open jobs that publish an hourly rate in USD. They are published rates, not a guarantee of income. Last checked on October 8, 2026.
This role involves judging how frontier AI models respond to sensitive and ambiguous topics, checking answers for safety, accuracy and policy compliance. It suits experienced professionals from fields such as psychology, law, science or public policy who can apply safety rubrics and give structured feedback to model developers.
Posted July 16, 2026
This role involves stress-testing frontier AI models with adversarial prompts to uncover jailbreaks, unsafe behaviour and policy failures on sensitive topics. It is aimed at experienced safety, security, life sciences or policy professionals who can document weaknesses and help researchers strengthen model alignment.
Posted July 16, 2026
This job involves recording Castilian Spanish voice samples used to train and test text-to-speech systems that aim for natural, expressive speech. It suits native Peninsular Spanish speakers, whether experienced voice professionals or newcomers with a clear voice and a good recording setup. The work is a single session of about four hours, with a possible second session later.
Posted June 1, 2026
This job consists of recording your daily domestic activities using your smartphone, filming household tasks in first person according to project guidelines. You will be paid per hour of validated video that you submit. The role is suitable for anyone with compatible equipment and able to perform repetitive movements safely.
Posted April 21, 2026
Referral link to micro1's job list: search for this role there. Open this exact job
You will develop robust backend services in C# and .NET to contribute to the training of next-generation AI systems. This remote role values your software development expertise rather than prior knowledge of artificial intelligence. You will collaborate with cross-functional teams to design scalable and secure solutions.
Posted April 17, 2026
Referral link to micro1's job list: search for this role there. Open this exact job
This Big Data Engineer role consists of designing and maintaining scalable data pipelines to support the training of next-generation AI systems. You will work as a contractor in remote, collaborating with cross-functional teams to implement robust data integration and processing solutions. The role requires deep expertise in big data engineering and advanced proficiency in Python and distributed technologies.
Posted April 17, 2026
Referral link to micro1's job list: search for this role there. Open this exact job
This role enables a machine learning engineer to contribute to the development of next-generation AI systems by designing and refining machine learning models. You will apply your expertise in Python and ML frameworks to process large volumes of data, optimize model performance, and deliver actionable insights based on rigorous analysis.
Posted April 17, 2026
Referral link to micro1's job list: search for this role there. Open this exact job
This remote-style contract role asks experienced SOC analysts to review and validate security alerts and investigations, separating true positives from false positives across SIEM, endpoint, cloud and identity data. Work includes building ground-truth investigations and judging whether automated or human conclusions are valid, incomplete or incorrect. It suits seasoned Tier 2 or higher analysts who are fluent in Splunk and comfortable making decisive evaluations.
Posted January 18, 2026
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FAQ
288 AI training jobs in Spain are open on SideHustler today. 32 were posted in the last 7 days. Listings are rechecked against the official postings: the latest check on this list was on October 8, 2026.
Among the 268 open roles that publish an hourly rate in USD, pay runs from $6 to $400 per hour, with a median of $70. These are the rates the platforms publish, not a guarantee of income or hours.
micro1 (276), Mindrift (7), Mercor (4) and Turing (1). You apply on the platform itself, which handles screening, contracts and payment.
The most requested areas of expertise on these listings are AI Evaluation, Data Annotation, Content Annotation, Multilingual Expertise, Language Evaluation. Each listing states its own requirements.
Each job listed here comes from a posting where the platform publishes the countries it accepts, and Spain is among them. 616 other open jobs do not publish their eligible countries: they are in the full catalog but not on this page.
Apply now opens the official posting on the platform, where you complete the application. You need no account on SideHustler. To see which roles fit your background first, add your resume and every open job is scored against your profile.
