Senior Software Engineer (Hybrid, San Francisco)

About Apollo Apollo is the AI-powered go-to-market platform that helps revenue teams find, engage, and convert their best customers. We combine a database of more than 210 million contacts and 35 million companies with an agentic end-to-end GTM platform, and more than 500,000 companies rely on us to run their go-to-market motion. We are profitable, growing fast, and rebuilding the product around AI and agents. Your role and mission You will design, build, and scale significant systems and features, owning them end-to-end. You will take on ambiguous, higher-scope problems, make the key technical tradeoffs, and be accountable for the correctness, performance, and reliability of what you own. What you will do Own significant systems and features end-to-end, from design through production and operation Break down hard, ambiguous problems and drive them to shipped outcomes Own the reliability, performance, and cost of the systems you are responsible for Partner across product, design, and engineering to solve problems that span teams Raise the quality bar and set patterns that make the people around you more effective How we work: AI-native by default You treat AI-assisted development as a core part of how you work. You use agents to move faster on design, investigation, and implementation, with clear judgment about where to review closely, and you look for ways AI raises the leverage of the whole team. What we are looking for A strong track record of owning and shipping systems at scale Command of system design, data modeling, and the reliability and cost tradeoffs that come with scale The ability to lead ambiguous work to a clear outcome Genuine, current fluency with AI-assisted development A high bar for quality and a strong sense of ownership Our tech stack React on the front end; Ruby, Ruby on Rails, Python, MongoDB, and Elasticsearch on the backend; Kubernetes, Docker, and Terraform in infrastructure; GCP for cloud. What you will love about Apollo You will own real scope on systems that hundreds of thousands of companies depend on, work with a high-bar team, and have the AI tooling and budget to work at the top of your leverage.