Remote · Full-time
Most products don’t fail because of bad engineering. They fail because nobody wanted them. Teams skip research and guess or follow gut, which is expensive.
Replicas is a computational model of human populations millions of synthetic people with real demographics, real psychographics, and real decision-making patterns. Grounded in census data, behavioral science, live market signals, and real-time consumer sentiment. Always current. No fictional personas. No hallucinated opinions. Statistically validated behavioral simulation at population scale.
Survey them across 6 research modes in minutes.
We’re building toward our own proprietary model. We need the person who will help us get there while keeping everything running at scale.
You’ll be the first founding engineer we hire. Half of this role is ML designing, training, and evaluating proprietary models that make our behavioral simulation more accurate, more efficient, and harder to replicate. The other half is systems, building the infrastructure that makes those models usable at production scale for thousands of concurrent users.
We’re currently experimenting with hybrid LLM + probabilistic simulation systems and reinforcement-style feedback loops from user interaction data.
This isn’t a prompt-engineering role dressed up as ML. We are building real model training pipelines, and we need someone who knows what that actually involves.
But along with the skills, we’re looking for someone who genuinely believes this is the right direction; synthetic populations trained on real human behavior will become a fundamental tool for how products get built and decisions get made. If you think that’s true, this role will feel obvious. If you’re not sure, it probably isn’t the right fit.
If this resonates and you believe synthetic populations will fundamentally change how decisions get made, reach out to us.
Before applying, please spend time with the product. It’s free: askreplicas.com
We care deeply about signal, and the best candidates will have strong, informed opinions about what we’re building.
After trying it, we also ask you to share structured feedback here: askreplicas.com/beta-feedback
When you reach out, please include:
We’re especially interested in people who think critically about the product. Clear conviction matters, but clear critique matters just as much.
If you don’t resonate with the product direction, this is probably not the right role.
No recruiters. The founder reads everything.