Founder CTO
Job Description
Location: Sydney (preferred) / Australia
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Stage: Early revenue, scaling
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Equity: 50% vesting over 4 years
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Early Revenue
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About Trainset.ai
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Trainset.ai is building a compliance-first, enterprise-grade AI data labeling platform for companies that actually care about accuracy, security, and scale.
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We already have:
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- Paying customers \n
- Access to ~170,000 global freelance workers via existing micro-task platforms \n
- Clear demand from AI teams needing human-in-the-loop labeling (vision, NLP, LLM evals, RLHF, etc.) \n
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This is no longer an idea — it's an early business that needs a technical co-founder to help turn momentum into a real category-defining product.
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Role
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I'm looking for a CTO / Technical Co-Founder to own the technical vision and execution.
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You'll be responsible for:
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- Architecting and scaling the core platform \n
- Designing systems for QA, consensus labeling, auditability, and compliance \n
- Making early technical decisions that will shape the company for years \n
- Hiring and leading engineers as we grow \n
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This is a builder role first, leadership role second.
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Qualifications
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Who You Are
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- A senior full-stack engineer or tech lead \n
- Comfortable moving fast in early-stage chaos \n
- Opinionated but pragmatic about architecture \n
- Excited by AI tooling, marketplaces, or data infrastructure \n
- Looking for real ownership, not just a job \n
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Startup or scale-up experience is a big plus.
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Equity & Compensation
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- 50% equity, vesting over 4 years (standard founder vesting) \n
- This is a true co-founder role — not a contractor, not "sweat equity theatre" \n
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Why This Is Interesting
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- Real customers, real revenue \n
- Clear path to enterprise deals \n
- Strong leverage from existing worker network \n
- Massive tailwinds from AI adoption \n
- Opportunity to build something defensible, not just another SaaS wrapper \n