AI training work · country guide
Paid, part-time, flexible remote work evaluating and improving AI models — for professionals in Spain, across Mercor, micro1 and Turing. Freelance, weekly pay in USD, and a 4-hour daily overlap with US Pacific time we explain honestly below. Whatever your field — finance, software, data, law, medicine or research — if your professional judgement is the kind of thing AI now needs checking against, this is where it’s paid for: reviewing and improving what the AI produces.
I’ve tracked these roles daily since early 2026 and taken on assignments on both Mercor and micro1 myself — so what follows is what I actually see in the listings and in the work, not a guess.
checked Aug 2026
The hours, honestlyComfortable — evening
CET workable
Workable — CET gives a defined late-afternoon and evening overlap with US Pacific. On US summer time the blocks shift an hour earlier.
Which platforms accept candidates in Spain?
| Platform | Eligibility | Eligible roles | Payment |
|---|---|---|---|
| Mercor | ✓ Supported | 68 | Stripe; weekly, USD |
| micro1 | Eligible (per-role verification) | 71 | Through the platform after verification (Deel) |
| Turing | ✓ Available via Deel | 41 | Deel: local bank transfer, Wise and more |
Counts from our live inventory, checked August 2026. Spain is fully in scope, EU/GDPR-aligned, USD payment via Deel, no residence bars.
Which roles are open to Spain — and who’s in demand?
Very few roles are aimed specifically at Spain — and that’s the point worth understanding. The overwhelming majority of AI training work doesn’t specify a country at all: it’s global-default, open to anyone eligible on the platform, and Spain qualifies. So your opportunity isn’t a handful of local postings — it’s the 179 roles in the broader pool.
And this is where Spain plays to its strengths. With Madrid’s finance district and Barcelona’s 22@ tech quarter, the strong Universidad Politécnica and IE/ESADE communities, and a large bilingual professional pool, it has exactly the kind of professionals these roles pay for: software, data, finance and professional-services people whose judgement is what the models need checked. That means finance and quantitative roles, AI, ML & data work, software engineering, legal and clinical review, broad generalist work, and entry-level openings for students and recent graduates — all as flexible, part-time remote work paid in USD. (Counts from our live inventory, checked August 2026; eligibility confirmed per role at application.)
Common questions
Can I work a 4-hour PST overlap from Spain?
Yes. Workable — CET gives a defined late-afternoon and evening overlap with US Pacific. The overlap explainer has an interactive calculator and map.
Which platforms accept candidates from Spain?
All three engage Spain-based professionals. Spain is fully in scope, EU/GDPR-aligned, USD payment via Deel, no residence bars. Eligibility is confirmed per role at application.
How and when am I paid?
Weekly, in USD, as a freelancer — via Stripe (Mercor) or Deel (Turing and micro1), which supports local bank transfer, Wise and more. You invoice for hours or tasks completed; there’s no employment relationship.
What languages do I need?
Most work is in English, though Spanish and English backgrounds open additional multilingual and localisation projects. Strong written English is the common requirement.
Is this legitimate, and is ACJ recruiting me?
The work is real freelance AI-training work on established platforms. ACJ is a referral intermediary — we point you to the platforms and earn a referral fee if you’re placed, at no cost to you and with no effect on your pay or hiring. We don’t employ you or make hiring decisions.
Nearby: UK · Ireland · Germany · Netherlands
See also: All countries — the by-country map · The 4-hour PST overlap, explained