Engineer Side Hustle: Remote AI Training Jobs and Pay

AI training jobs for engineers: the short answer

If you are an engineer looking for a side hustle that pays for what you already know, AI training work is the most direct fit. AI companies pay software, mechanical, electrical and civil engineers to write problems from real systems, build reference solutions and grade the code and designs AI models produce.

Pay is published by listing. On 12 November 2026 Mercor said "Software engineering listings on Mercor have posted at $70 to $150 an hour, set per project by scope and depth" (Mercor), and its mechanical, electrical and civil engineer reviewer roles each paid "$90 per hour" (Mercor). DataAnnotation listed software work at "Up to $150+/hr" (DataAnnotation).

The work is contract and project-based. Some weeks will be full and some empty, so most engineers fit it around a main job rather than replace one.

What AI training work for engineers involves

For software engineers, Mercor describes writing a problem "from a system you have shipped" with requirements, constraints and failure modes, grading model-written code and design, and "Flagging where a model's code passes review and would fail in production, given concurrency, scale, error handling, or what it costs to operate" (Mercor). DataAnnotation says "most tasks use Python, C++, Rust, Go, or JavaScript" (DataAnnotation).

For other disciplines, the work splits into writers, who build evaluation tasks, and reviewers, who check them. Mercor's mechanical, electrical and civil roles frame tasks around large product, power and infrastructure projects (Mercor). Handshake AI's PCB role asks for tasks "based on real workflows, such as schematic capture, component selection, board layout and routing" and SPICE simulation (Handshake AI).

One unusual model: Alignerr's software role pays you to keep building your own GitHub project with an AI coding assistant, and says "token costs on us" (Alignerr).

Source: Mercor: Software Engineering Expert talent network

Engineering side hustles in AI training: programs and pay by discipline

Rates read on each program's own listing on 12 November 2026. Listings open and close often.

Sources for this table: Mercor: Software Engineering Expert talent network, read 12 Nov 2026; DataAnnotation: Software Engineer, read 12 Nov 2026; Handshake AI: Software Engineer, read 12 Nov 2026; Alignerr: open roles, read 12 Nov 2026; Mercor: Mechanical Engineer Reviewer, read 12 Nov 2026; DataAnnotation: Mechanical Engineer, read 12 Nov 2026; Mercor: Electrical Engineer Reviewer, read 12 Nov 2026; Mercor: Electrical Engineering and Simulation Expert, read 12 Nov 2026; DataAnnotation: Electrical Engineer, read 12 Nov 2026; Handshake AI: PCB Tool Specialist, read 12 Nov 2026; Mercor: Civil Engineer Reviewer, read 12 Nov 2026; DataAnnotation: Civil Engineer, read 12 Nov 2026.

Alignerr, which is "Powered by Labelbox", advertises "$80/hr Average pay" across its roles (Alignerr). Outlier lists "coding, STEM, languages" among its fields (Outlier) but publishes no rate by field. micro1 recruits across "engineering, finance, healthcare, legal, and more" (micro1) but shows rates only inside each listing; its onboarding FAQ describes an expected commitment of "approximately 15–20 hours per week, depending on client requirements" (micro1).

Mercor engages experts as independent contractors, pays "weekly on Stripe or Wise based on services rendered", and warns that "Projects can be extended, shortened, or concluded early depending on needs and performance" (Mercor).

Requirements by discipline

Senior reviewer roles set a high bar. Mercor's civil reviewer asks for "5+ years working as a civil engineer or engineering lead" and says "A recognized professional engineering credential is strongly preferred (US PE, or an international equivalent such as CEng, EUR ING, or P.Eng)" (Mercor). Its mechanical and electrical reviewers ask for "5+ years working as a mechanical engineer or engineering lead" (Mercor) and "5+ years working as an electrical engineer or engineering lead" (Mercor).

Other roles are open earlier. DataAnnotation asks for "2+ years of professional mechanical engineering experience in any specialty" (DataAnnotation) and "2+ years of industry experience in circuit or electronics engineering" (DataAnnotation). Handshake AI's software role wants a "minimum 1 year of professional, direct hands-on work as a software engineer" (Handshake AI).

Location rules vary. DataAnnotation's civil role says "Only applicants based in Australia, Canada, Ireland, New Zealand, the United Kingdom, or the United States will be considered for this role" (DataAnnotation); Handshake AI is US-only (Handshake AI).

Source: Mercor: Civil Engineer Reviewer

How to apply

Apply to the listing that names your discipline and tools. A specific listing usually moves faster than a general pool.

• Lead your resume with the systems, products or structures you owned, the tools you use (CAD, FEA, SPICE, your languages) and your PE if you hold one.
• Expect a screening: Mercor runs a short AI interview; DataAnnotation's steps are apply, qualify, then work and get paid.
• Ask what a task is and how it is approved. micro1's FAQ says hourly pay is "based on the hours you track that are approved by the project team" (micro1).
• Confirm whether the project needs particular hardware or software before you accept.

Tell us what you do. We'll send you the paid AI work that fits your field, wherever you live. It's free.

What to check first: employer policy, confidentiality and your code

Tell your employer when the code of ethics expects it. The NSPE Code of Ethics says "Before accepting any outside engineering employment, they will notify their employers", and "Engineers in salaried positions shall accept part-time engineering work only to the extent consistent with policies of the employer and in accordance with ethical considerations" (NSPE).

Keep employer and client information out. The same code says "Engineers shall not disclose, without consent, confidential information concerning the business affairs or technical processes of any present or former client or employer, or public body on which they serve" (NSPE). Do not base a task on your employer's codebase, drawings, test data or a client's project, even with names removed. Mercor states that its work "will not involve access to confidential or proprietary information from any employer, client, or institution" (Mercor).

Read your employment agreement. Software and hardware employers often include invention-assignment and outside-activity clauses. Check what they cover before you write code or designs for anyone else, and use your own computer and accounts.

Source: NSPE Code of Ethics for Engineers (PDF)

How it compares with other side hustles for software engineers and engineers

The usual engineering side hustles differ mainly in how much selling and how much liability they bring. Pay for the non-AI options depends on clients and market, so no figure is given.

AI training work trades upside for simplicity: no sales and no stamped drawings, but no recurring clients and no say over when projects end.

Is it steady?

Not reliably. Mercor's pool listings say matching depends on what clients are running and "can be within a week or several months" (Mercor), and PYMNTS reported a Mercor engineering contractor whose assignments dried up until "in mid-March Mercor cut his contract" (PYMNTS).

Check each program before you apply: see our reviews of Mercor, Handshake AI, Scale AI and Outlier and Turing, and the wider list in Mercor competitors.

Aerospace, semiconductor, electronics, PCB and CAD specialists

Hardware specialists now have their own listings. On 14 November 2026, published per-hour pay ("up to" figures are ceilings):

• Aerospace: micro1 Aerospace Engineering Expert $85-185 (micro1); Handshake AI Aerospace Engineering Professional up to $75, 4+ years of aerospace experience (Handshake AI).
• Semiconductors and chip design: micro1 Semiconductor Engineering Expert $85-185, master's or PhD plus principal-level experience or a faculty post (micro1); Handshake AI Semiconductor & Chip Design Engineer up to $120 (Handshake AI); Mercor Chip Design Expert (RTL design and verification) $100, 5+ years, about 15-20 hours a week (Mercor); Mercor semiconductor and superconductor materials $84, US-based (Mercor); Alignerr semiconductor material science $75-90 (Alignerr).
• Electronics and hardware: DataAnnotation Electronics Engineer up to $125+, 2+ years in circuit or electronics engineering (DataAnnotation); Mercor electrical and hardware experts $100-120, 5+ years (Mercor).
• PCB tools: Handshake AI PCB Tool Specialist up to $125, 2+ years with tools such as KiCad, DesignSpark PCB, LTspice, ngspice or Qucs-S (Handshake AI); micro1 KiCad PCB Design Specialist $65-123 (micro1).
• CAD: Handshake AI CAD Tool Specialist up to $125, 2+ years with LibreCAD, SolveSpace, OpenSCAD or Rhino3D, US work authorisation (Handshake AI); Mercor Mechanical / CAD Engineer $60-100, US, at least 20 hours a week (Mercor).

Next step

Clear outside work with your employer, then apply to the two listings closest to your discipline and tools.

Tell us what you do. We'll send you the paid AI work that fits your field, wherever you live. It's free.

Origin Data Partners is independent of the programs on this page. A program may pay Origin when Origin introduces someone who joins it, which never changes what you are paid (how Origin is paid).