About the job
Submit your CV in English and indicate your English proficiency level.
toloka-ai, in partnership with Mindrift, offers project-based assignments for subject matter experts in AI and material science. These freelance roles focus on testing, evaluating, and improving AI systems for technology clients. This is not a permanent employment contract; work is assigned per project.
Role overview
Freelance AI Trainer & Material Scientist assignments vary by project. Typical work includes:
- Creating original materials that mirror real engineering workflows
- Designing engineering problems that require Python programming for calculations and simulations
- Ensuring tasks are computationally intensive, using numerical methods or iterative approaches
- Developing challenges in system design, optimization, and analysis
- Grounding problems in research challenges or practical engineering applications
- Validating solutions using Python and standard engineering libraries
- Documenting problem statements and providing thoroughly checked solutions
Preferred qualifications
- Degree in Material Science or a related discipline
- Proficiency in Python for numerical validation; experience with MATLAB, R, C, SQL, Numpy, Pandas, SciPy, or similar libraries is valued
- Minimum 2 years of professional experience (applied, research, or teaching)
- Understanding of practical engineering constraints and approximations
- Excellent written English (C1 level or above)
Project process
- Apply
- Complete qualifications
- Join a project
- Fulfill assigned tasks
- Receive payment
Time commitment
During active project phases, expect to work approximately 10–20 hours per week. Workload may fluctuate and is not guaranteed outside these periods.
Compensation
Earn up to $26 per hour, depending on contribution and pace. Actual rates are based on project scope, complexity, and required expertise. Other projects on the platform may offer different pay structures.

