freelance data annotator

DescriptionMindrift is looking for a versatile, highly skilled Graphic Designer with strong experience in logo design and visual identity to join the Tendem project (**https://tendem.ai/**) and create high-quality visual assets for real-world use cases. In this role, you'll apply your expertise in logo design, branding, visual communication, typography, and...

Mindrift is seeking a part-time AI Workflow Engineer for the Tendem project in Spain. This remote freelance role focuses on designing and optimizing AI-driven workflows powered by LLMs. You'll collaborate with agents and leverage your expertise in prompt engineering, automation, and data structuring. Ideal candidates will have at least 3 years of relevant...

Mindrift is seeking a part-time AI Workflow Engineer for the Tendem project in Spain. This remote freelance role focuses on designing and optimizing AI-driven workflows powered by LLMs. You'll collaborate with agents and leverage your expertise in prompt engineering, automation, and data structuring. Ideal candidates will have at least 3 years of relevant...

Focus on Local Businesses | High-Earning Potential | Flexible HoursAbout Recruit4Work Recruit4Work is a reputable international recruitment agency with a team of over 30 experienced professionals. We specialize in a wide range of industries and pride ourselves on delivering top-quality candidates at competitive rates. Our expertise and speed in matching...

aitrainer is seeking an Expert Rater to support and guide fellow raters, focusing on improving rating accuracy and decision‑making while ensuring client expectations are met.¿Interesado en saber más sobre este trabajo? Desplácese hacia abajo y descubra qué habilidades, experiencia y cualificaciones académicas se necesitan.You will coach raters, run...

On-site Data Center Technician in Benahavis, Spain, responsible for installing and maintaining server equipment and performing cabling in data center facilities.

Overview Mindrift connects specialists with project-based AI opportunities for leading tech companies, focused on testing, evaluating, and improving AI systems. Participation is project-based, not permanent employment. What This Opportunity Involves While each project involves unique tasks, contributors may: Design original computational data science...

Freelance Brand Project Manager (Part-time) A part-time freelancer to run brand projects for our biggest B2B tech client until the end of 2026. Part-time freelance · Remote (CET) About us We're Camping, a brand storytelling and video agency in Barcelona. We help B2B tech companies go from 'boring' to heartfelt, through brand work and video. The...

Welo Data is seeking experienced linguists to support a synthetic data generation program for a leading technology client. You will review an English source document alongside two machine-generated Spanish translations and select the preferred version with a written justification.This freelance contract role is remote (Spain) for 2 weeks, with a pay rate of...

Hey there! David Kennedy Recruitment is on the lookout for an amazing Freelance Recruitment Partner to join our team. If you're a true hunter and love connecting talented individuals with our clients needs we want to hear from you! This freelance role offers either a commission-based structure or fixed term arrangement (SLA).Position: Fixed Term or...

Freelance Creative Strategist (Spanish Market) - Paid Social Video Overview At Dolead, we align marketing, sales, and data to turn media investment into real pipeline. In short: we launch paid campaigns faster, integrate data with confidence, and deliver sales-ready leads at a fixed cost per lead. We’re looking for a Freelance Creative Strategist to...

Updated: 07 July 2026 Freelance | 8–20 hrs/week | Remote (EU/UK) Are you an experienced specialist in eIDAS2 and Qualified Electronic Signatures (QES), passionate about advancing AI‐driven legal technology? Do you have 8–20 hours per week to contribute alongside your current commitments? Join 10x Team and help shape how AI understands and applies...

g2 Recruitment is seeking a Freelance HVAC/Mechanical Design Engineer based in Madrid to work on data center and construction projects. The role involves 4 days per week on-site in Madrid with an optional remote day, for an estimated 6–12 month duration. Key requirements include HVAC and Mechanical design experience for engineering and construction...

FRENCH SOCIAL MEDIA & CONTENT CREATOR — FREELANCE OUR MISSION At Lateral Thinking, we connect brands with people through interactive experiences in the form of spaces, actions and content. We are thinkers and makers. We conceive and produce ideas, understanding that creativity does not end with the concept itself but must shape every stage of its...

Mindrift is looking for skilled AI Workflow Engineers to join the Tendem project ( and build intelligent automation systems powered by LLMs within our hybrid AI + human environment.In this role, as an AI Pilot - that's how we refer to this position at Mindrift - you'll collaborate with Tendem Agents that handle repetitive tasks, while you provide structured...

G2 Recruitment seeks an experienced Freelance Project Director for a large-scale Data Center project in Barcelona. The role is senior, hands-on, driving the programme from design to handover with GC and stakeholders, on a high-pressure environment.The successful candidate will oversee the full lifecycle of the project, manage cost, schedule and quality...

Reboot Monkey is seeking a Freelance Data Center Technician to deliver on-demand support across our global data centers. You will install, troubleshoot, and maintain servers, networking gear, and virtualization platforms, working independently with remote teams.Ideal candidates have 3+ years in data center operations, hands-on Cisco/Juniper experience,...

Reboot Monkey is seeking a Freelance Data Center Technician to support on-demand operations for global data centers. You will install, configure, and troubleshoot servers and networking gear, while coordinating with remote teams to ensure uptime and security.The role requires 3+ years in data center operations, strong Cisco/Juniper networking knowledge, and...

We are looking for a Network Expert / Network Product Engineer – On-site in Madrid We are looking for an experienced Network Expert / Network Product Engineer to join a long-term international project within the Data Center and Network Infrastructure sector, focused on network architecture, security, infrastructure transformation and the evolution of...

Our partner is looking for a Welsh Language Specialist - Freelance AI Trainer Project based in Spain. This freelance opportunity is designed for an experienced Welsh language professional who wants to contribute directly to the development of next-generation AI systems. You will apply your linguistic expertise to evaluate, annotate, and improve AI-generated...