74 freelance English-speaking jobs in Lisbon

Innodata seeks a remote Content Reviewer to evaluate online content for accuracy and quality. This freelance role requires 30 hours per week and involves identifying errors, categorizing content, and improving AI responses.

Freelance AI trainer needed to design and develop computational biology problems requiring Python programming. Must have a biology degree, Python proficiency, and experience with biological data analysis and algorithms.

Freelance AI trainer needed to design computational physics problems requiring Python programming. Must have a degree in Physics or related field, 2+ years of experience, and strong Python skills.

Freelance optical engineer with Python experience needed to design and develop computationally intensive physics problems. Must have strong Python skills (Numpy, SciPy, Sympy) and experience with numerical simulation methods.

This flexible freelance role allows you to set your own schedule, making it an ideal supplement to your

Visit.org is looking for a passionate and ambitious Freelance In-Person Event Host in Lisbon, Portugal

Certified Accountants needed for freelance, on-call advisory roles. Analyze financial documents, validate data, and provide expert analysis for B2B and AI research projects. Must have active professional certification (CPA, ACCA, ACA, CIMA, or equivalent).

(no need to be an expert)Role detailsStart : ImmediateLocation : Remote, based inLisbonEngagement : Freelance

results-driven attitude Ability to work independently and manage your own territory Status:independent / freelance

Freelance AI trainer needed to design computationally intensive mathematical problems requiring Python programming. Must have a degree in Mathematics or related field, Python proficiency, and experience with numerical methods and symbolic computation.

Freelance English writers train AI models by crafting text that teaches AI reasoning, logic, and clarity. Contributors create original, fact-checked responses, collaborate with Quality Assurance Specialists, and adhere to style and quality standards.

projects alongside leading research labs Fully remote and flexible — work when and where it suits you Freelance

chances of interviewing at Randstad Enterprise by 2x Sign in to set job alerts for "Recruiter" roles.Tech Freelance

research labs and healthcare innovators Fully remote and flexible—work when and where it suits you Freelance

AI.Impactful, challenging work with direct business influence.Competitive salary and benefits (full‐time or freelance

Experienced IT Procurement Specialist needed for software procurement, contract management, and supplier negotiations. Minimum 5 years of experience in vendor management, contract negotiation, and international environments required.

cancer research is understood and advanced Fully remote and flexible — work when and where it suits you Freelance

Freelance Mechanical Engineer and Python expert needed for AI training projects. Design computational engineering problems, create Python-based solutions, and verify results. Requires a degree in Mechanical Engineering or related field, Python proficiency, and 2+ years of experience. Strong written English (C1+) is essential.

LinkedIn Profile required for eligibility check.Location Remote (US, UK, CAN, EMEA)Type of contract Freelance

We are looking for a Senior Salesforce Marketing Cloud Developer (freelance) to deliver large and complex