61 freelance English-speaking jobs in Lisbon

About the Role This is a freelance role for a Tendem project. 

Freelance Agent Evaluation Engineer needed to design and evaluate AI coding agent performance in simulated developer environments. Requires 5+ years software development experience with Python, JavaScript/TypeScript, Docker, Postgres, Kafka, Redis, and testing experience.

$60,000.00-$100,000.00 1 week ago Portugal $203,320.00-$227,240.00 1 month ago Solution Architect - Freelance

Remote position working for Malaga hub Long term Freelance Contract CET working hours Possibility to

Mathematician with Python needed for freelance AI training projects. Tasks include designing math problems, evaluating AI solutions, and validating calculations using Python (NumPy, Pandas, SciPy). Requires a math degree and 3+ years of experience.

to $32/hour depending on your skills, experience, and project needs Take part in a flexible, remote, freelance

and water photography speak fluent English can stay until end of October 2026 can be employed on a freelance

Flexibility on contract – open to full‐time in‐house or freelance/retainer for the right person.

Title: Influencer & Talent Agent Location: 📍 Remote (Work from Anywhere) Job Type: ⏰ Full-Time Freelance

This is an international, fully-remote, freelance contractor position, working from home, at a location

Take part in a flexible, remote, freelance project that fits around your primary professional or academic

About the Role This is a freelance role for a Tendem project.

Senior MuleSoft Platform Operations Engineer needed for Level 3 support, incident management, automation, and continuous improvement within an international technical environment. Requires 5-7 years of MuleSoft platform management experience, expertise in Omni Gateway, Terraform, GitHub, OpenShift, and ITIL processes.

Product Designer (UX/UI) – Remote – Freelance Portugal $75,000.00-$115,000.00 7 months ago Rev-celerator

Strategy consultants with 3+ years of experience at top-tier firms (McKinsey, BCG, Bain, etc.) are needed to build realistic consulting project environments for AI training.

Mindrift seeks a Senior Python Engineer to build realistic developer environments and design tasks for evaluating AI coding agents. Responsibilities include crafting prompts, defining task solutions, and writing tests to verify agent performance. Qualifications require 8+ years of software development experience with Python, JavaScript/TypeScript, Docker, Postgres, Kafka, and Redis, along with experience writing tests.

the body, and Mindpartner access for the mind Flexibility on contract — open to full-time in-house or freelance

Freelance Recruiter (Startups and Scaleups - Remote - Lisbon Talent Acquisition Operations Senior Specialist

companies connects businesses with global, AI-enabled talent across every contingent work type including freelance

Full Stack Data Analyst - Critical Data Products Full Stack Data Analyst - Critical Data Products Tech Freelance