Senior Software Engineer

Senior Software Engineer Full time San Francisco or New York On site Compensation $400K to $500K base salary plus meaningful equity Location San Francisco or New York, on site At Dynamism, we partner with breakout startups backed by Sequoia, a16z, and Y Combinator to help them hire engineers with founder energy, people who build fast, think like owners, and thrive in zero to one environments. We're hiring for this role at an early stage applied AI company building high fidelity environments, tasks, data, and evaluation infrastructure that help frontier models learn reliable behaviour in real work. The company works closely with frontier AI labs and enterprises, and is backed by Sequoia Capital, Menlo Ventures, BCV, and SV Angel. Its engineering first team brings together former founders, researchers, and deeply technical builders who value speed with rigor, truth over comfort, and precision under pressure. The Role You will own major parts of the platform that support data curation and delivery, research workflows, expert collaboration, and environment quality. You will design and ship systems end to end while raising the engineering bar for a small team moving at research speed. What You'll Own Core platform services for data curation, delivery, research workflows, and expert collaboration Shared abstractions and quality standards used across environments and evaluation work Systems that stay reliable while requirements and research directions change quickly Tooling that lets a small technical team direct multiple AI agents without outsourcing judgment Architecture and engineering standards that compound delivery speed over time Are a strong technical generalist who can move across product, infrastructure, data, and research tooling Have built important systems at an early stage company or owned outcomes with founder-level agency Can make sound architecture decisions without requiring a long planning cycle Use AI tools deeply and communicate clearly enough to direct multiple agents in parallel Move fast while protecting correctness, maintainability, and operational quality TypeScript, Python, web systems, data tooling, Docker, AWS, Postgres, agent infrastructure, evaluation tooling Founded a company or worked as an early engineer Built infrastructure used by researchers, data teams, or external experts Worked on AI safety, evaluations, post-training, or agent systems Set technical direction across several systems in a small engineering team Compensation: $400K to $500K base salary plus meaningful equity Location: San Francisco or New York, on site Full time and on site This role will not suit someone looking for routine, a narrow technical silo, or a management only position. The team moves quickly, expects direct ownership, and does not trade quality for speed. #J-18808-Ljbffr