CFD Engineer – AI Trainer
Also posted for: United States (Up to $69/hr), Sweden +7 (Up to $50/hr), Japan +5 (Up to $39/hr), Saudi Arabia +9 (Up to $37/hr), United Kingdom (Up to $36/hr), Egypt +7 (Up to $23/hr), Israel +4 (Up to $19/hr), Brazil +9 (Up to $17/hr), India +13 (Up to $9/hr)
Up to $31/hr
Remote part time STEM contract with Mindrift, up to $31/hr, open to people in Serbia, Estonia, Malta and 13 more countries. Posted Nov 5.
Up to $31/hr
Apply on MindriftIs this job worth applying to?
- Pay
- Below typicalTops out at $31/hr. The typical top rate across 148 priced STEM listings is $70/hr.
- Getting in
- Some screening~1 hour + CV review. CV showing the relevant skill.
- Steady work
- Work is patchyPer-task pay: rejected work earns nothing.
- Payout record
- Pays on timeSchedule: twice a month. Paid via Payoneer or Tipalti.
- Freshness
- FreshPosted 1d ago. Still listed on Mindrift on Nov 6, 2026.
- Where you live
- Named countries onlyOpen in Serbia, Estonia, Malta and 13 more.
The job description
About the role
Help train and evaluate AI agents on expert-level fluid simulation tasks. You'll take CAD geometry, set up and run simulations, build verified reference solutions, and write Python checks for the agent's results.
Requirements
- A degree in Mechanical or Aerospace Engineering, or a related field such as energy or oil & gas. A PhD is preferred but not required.
- Several years of hands-on industry or research CFD with OpenFOAM, ANSYS Fluent/CFX or STAR-CCM+, including meshing.
- Solid verification and validation practice: mesh-independence studies, and validation against experiment or benchmarks.
- Comfortable with Python and GitHub.
- English at B2 level or above.
- Nice to have: aerospace, automotive, offshore or turbomachinery background; multiphase or particle-laden flow experience.
Project time expectations
For this project, tasks are estimated to require around 10–20 hours per week during active phases, based on project requirements. This is an estimate, not a guaranteed workload, and applies only while the project is active.
Compensation
On this project, contributors can earn up to $31 per hour equivalent, depending on their level and pace of contribution.
Compensation varies across projects depending on scope, complexity, and required expertise. Please note that other projects on the platform may offer different earning levels based on their requirements.
Why this freelance opportunity might be a great fit for you?
- Work fully remote on your own schedule with just a laptop and stable internet connection.
- Apply your expertise to real-world technology projects while gaining experience building high-quality solutions for a global platform.
- Participate in performance-based bonus programs that reward high-quality work and consistent delivery.
How do you apply to Mindrift?
Apply on Mindrift
The Apply button opens this post on Mindrift's own site. You apply with them, not with Rubric. Budget about 1 hour + CV review.
Get through screening
What Mindrift asks for after you apply:
- Complete the short assessment if your CV is a fit
- Verify your identity with Persona
- Get matched to a project and pass its onboarding
Start work and get paid
Pay schedule: twice a month. Paid via Payoneer or Tipalti. You're paid for the work they hand out, not a fixed salary.
Mindrift also needs
- CV showing the relevant skill
- Government ID
- Payoneer or Tipalti-supported bank account
Red flags
- Red flagWork droughts between projects
- Red flagBans after low quality scores with little explanation
What is Mindrift like to work for?
Toloka's freelance platform for AI training tasks, which now also absorbs the old Toloka crowd-worker program.
| Advertised pay | $15–90/hr |
|---|---|
| Getting in | Some screening |
| Application takes | ~1 hour + CV review |
| How you get paid | Twice a month, via Payoneer or Tipalti |
| Payout record | Pays on time |
| Countries | Open in many countries with a published geographic restrictions list; India availability is not confirmed on official pages, so check the list before applying. |
Paid per approved task; Mindrift quotes about $30/hr for general projects and up to $90/hr for specialist technical work, and rejected or expired tasks are unpaid.
