Senior Full-Stack Engineer
full-time•Hybrid•San Francisco•$180k - $200k+ Strong equity upside
About this role
At Blok, we’re building the simulation engine powering the next generation of adaptive software. Our multi-agent system predicts how different types of users will respond to digital experiences before any code is shipped. Product teams use Blok to simulate onboarding flows, test risky design changes, and de-risk product bets without waiting weeks for live traffic. We’re hiring a Senior Full Stack Engineer to help us scale out our product. You’ll work across the stack - from backend systems that orchestrate multi-agent simulations to frontend interfaces that help teams visualize outcomes, compare variants, and turn insights into action.
What you'll do
- Build and maintain features across our core web platform
- Develop tools that visualize agent behavior, including heatmaps, flow maps, and persona-level insights
- Collaborate closely with ML and infra teams to integrate LLM-driven agents, model outputs, and user simulations into the product
- Own internal tools and dashboards for analyzing agent performance, debugging simulations, and tracking cluster behavior
- Help shape UX for features like task authoring, experiment comparisons, and adaptive UI recommendations
- Work fast, ship weekly, and help define best practices as the product scales
About Blok
The future of product development in the era of frontier AI. We’re helping product and growth teams simulate user behavior before shipping code. With Blok you can test ideas in hours, not weeks, and uncover issues before they become expensive mistakes
Our culture
- Mission-driven culture
- Obsessive about understanding human behavior
- Fast shipping and learning
Ready to join Blok?
Take the next step in your career journey
Frequently Asked Questions
What does Blok pay for a Senior Full-Stack Engineer?
Blok offers a competitive compensation package for the Senior Full-Stack Engineer role. The salary range is USD 180k - 200k per year, plus Strong equity upside equity. Apply through Clera to learn more about the full compensation details.
What does a Senior Full-Stack Engineer do at Blok?
As a Senior Full-Stack Engineer at Blok, you will: build and maintain features across our core web platform; develop tools that visualize agent behavior, including heatmaps, flow maps, and persona-level insights; collaborate closely with ML and infra teams to integrate LLM-driven agents, model outputs, and user simulations into the product; and more.
Is the Senior Full-Stack Engineer position at Blok remote?
The Senior Full-Stack Engineer position at Blok offers a hybrid work arrangement, with office presence required in San Francisco, United States. This combines the flexibility of remote work with in-person collaboration.
How do I apply for the Senior Full-Stack Engineer position at Blok?
You can apply for the Senior Full-Stack Engineer position at Blok directly through Clera. Click the "Apply Now" button above to start your application. Clera's AI-powered platform will help match your profile with this opportunity and guide you through the application process.