Process & Chemical Plant Engineer

Use your hands-on experience in chemical engineering to write research-level problems for AI models. Remote, flexible contract work.

AfterQuery works with leading AI labs to build the expert data that tests and trains AI models. We're looking for process and chemical plant engineers who work with real plant and pilot data: the plant and pilot data you reconcile against design, from column, reactor, membrane and utility performance to guarantee tests.

Requirements

• Technical: Working knowledge of Python for working with your own plant data.
• Work authorization: Must be able to work as an independent contractor without visa sponsorship. Students on F-1 visas (including OPT/CPT) are not eligible.

Preferred

• Background: 3 or more years in operating plants or pilot plants, with a Bachelor's, Master's or PhD in chemical engineering.
• Hands-on work with real data, rather than pure process-simulation design (Aspen or HYSYS).

Contract and pay

Flexible, independent-contractor work: $300 per approved task, about 6 hours each (roughly $50 per hour), with no cap on how many tasks you take on.

All accepted experts undergo standard background and identity verification.

Responsibilities

• Write research-level problems in your area of expertise
• Work independently and manage your own time
• Keep your work accurate, clear and well documented

Required qualifications

• Hands-on experience working with your own real plant and pilot data in Python or a similar language
• Able to write clearly about technical work in your field
• Able to work independently and manage your own time. This is flexible, task-based work with no fixed weekly schedule

Preferred qualifications

• 3+ years in operating or pilot plants, with a degree in chemical engineering
• Ran performance or guarantee tests; data reconciliation and troubleshooting reports on real plant data
• Public code, a thesis or papers that show your technical work
• Prior experience in data annotation, data labeling or AI/ML evaluation work

Why apply

• $300 per approved task (roughly $50 per hour)
• Fully remote and flexible, with no fixed weekly schedule