Principal Software Engineer - AI Trainer - Freelance - 8-20hrs/week - Remote

Department: Technology & Product

Location: Portugal

Compensation: €93 – €159 per hour

Employment Type: Contract

Updated: 07 July 2026

Freelance | 8–20 hrs/week | Remote (EU/UK)

Are you an accomplished Principal Software Engineer passionate about shaping the future of artificial intelligence? Join 10x Team as a Freelance Principal Software Engineer – AI Trainer and leverage your technical expertise to enhance advanced AI models, all while enjoying the freedom of remote, project-based work.

About Us:
10x Team connects top independent professionals with leading AI labs to drive artificial intelligence advancement. We are looking for skilled software engineers based in the EU or UK to contribute to the training of AI systems in software architecture, engineering best practices, and technical problem-solving.

Key Responsibilities:

• Review and refine AI-generated outputs related to software engineering, system architecture, and coding standards

• Assess the accuracy and practicality of AI-driven recommendations on software design, testing, and implementation

• Develop real-world case studies and technical scenarios from your professional experience

• Create scenario variations covering software development lifecycle, technical challenges, and industry best practices

• Identify and articulate gaps or risks in AI recommendations, providing clear, structured feedback

• Influence how AI systems interpret and apply engineering principles and coding standards

About You:

• Experienced Principal Software Engineer with a strong background in software architecture, development, and technical leadership

• Based in the EU or UK

• Deep understanding of multiple programming languages, architectural patterns, and software development best practices

• Analytical and detail-oriented, capable of delivering actionable, structured feedback

• Available 8–20 hours per week and comfortable with remote, asynchronous collaboration

Why Join 10x Team?

• Flexible, project-based freelance assignments – 100% remote

• Help shape how AI systems understand and apply software engineering principles

• Access ongoing professional development through the 10x Team AI Academy

• Supportive community of independent experts with clear briefs and streamlined onboarding

How to Apply:

After applying, you’ll receive an email detailing the steps to:

• ⁠Complete a short written assessment

• Participate in an AI-powered interview

Important: Your application is only complete once you finish all steps via the email link.

Please note: these AI Lab missions are not traditional job openings with fixed start dates. Project demand is highly dynamic and matching depends on your expertise, availability, and current AI Lab needs. Some experts are matched within days, while others may wait longer for a suitable project.

Step into the future of AI-powered software engineering – apply today!

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NOTE

At 10x, there are two types of opportunities:

1. Traditional freelance missions
These are regular project-based opportunities where the listed mission is the actual project you may work on.

2. AI Lab roles
For AI Lab roles, we scout, review, and approve profiles for access to future project opportunities.

The missions listed for AI Lab roles are not traditional job openings. AI Lab work is often highly confidential as this exposes information of what an AI Lab is working on, and project requests are unpredictable. When an AI Lab request comes in, we often need to respond within 24 hours with suitable talent.

Matching depends on the specific needs of each AI Lab project and your niche expertise. Once your profile is reviewed and approved, you may be matched to relevant AI Lab projects when suitable opportunities arise.

This can happen within hours, but it may also take months, depending on the researchers at the AI labs and their project needs.