Senior Software Engineer; Hybrid, San Francisco

Apollo.io is the leading go-to-market solution for revenue teams, trusted by over 500,000 companies and millions of users globally, from rapidly growing startups to some of the world's largest enterprises. Founded in 2015, the company is one of the fastest growing companies in SaaS, raising approximately $250 million to date and valued at $1.6 billion. Apollo.io provides sales and marketing teams with easy access to verified contact data for over 210 million B2B contacts and 35 million companies worldwide, along with tools to engage and convert these contacts in one unified platform.

By helping revenue professionals find the most accurate contact information and automating the outreach process, Apollo.io turns prospects into customers. Apollo raised a series D in 2023 and is backed by top-tier investors, including Sequoia Capital, Bain Capital Ventures, and more, and counts the former President and COO of Hubspot, JD Sherman, among its board members.

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.

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.

• 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

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.

• 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

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.

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.

The listed Pay Range reflects the total cash compensation inclusive of annual base salary and annual bonus as applicable. For sales roles, the range provided is the role’s On Target Earnings ("OTE") range, meaning that the range includes both the sales commissions/sales bonus target and annual base salary for the role. This salary range may be inclusive of several career levels at Apollo and will be narrowed during the interview process based on a number of factors, including the candidate’s experience, qualifications, and location.

Applicants interested in this role who are not located in the US may request the annual salary range…