Senior Growth Engineer

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.

We’re looking for a Growth Engineer to join our team and accelerate our product’s growth through rapid experimentation, data analysis, and scalable technical solutions. You’ll work at the intersection of engineering, product, and marketing to optimize funnels, automate growth loops, and implement features that drive measurable impact.

Key Responsibilities:

• Develop and execute engineering strategies that enable rapid experimentation and data-driven decision-making.
• Collaborate cross-functionally with Product, Marketing, Data Science, and Engineering teams to optimize key growth metrics.
• Architect and build scalable systems that support growth initiatives, such as onboarding flows, personalization engines, and viral loops.
• Implement A/B testing frameworks and data instrumentation to ensure accurate tracking and measurement of experiments.
• Leverage automation and machine learning to optimize user engagement, reduce churn, and personalize user experiences.
• Ensure technical excellence through best practices in performance optimization, security, and scalability.

Qualifications

• Proficiency in full-stack development (e.g., JavaScript/TypeScript, React, Python, RoRm or Node.js) and cloud infrastructure (AWS/GCP).
• Experience with analytics tools (Amplitude, Mixpanel, Google Analytics) and A/B testing platforms (e.g., Optimizely, LaunchDarkly, Amplitude, Segment, Mixpanel, or Google Analytics)
• Familiarity with growth frameworks (e.g., Pirate Metrics, viral loops).
• Excellent leadership, communication, and stakeholder management skills.

Mindset

• Obsession with metrics (LTV, CAC, retention) and rapid iteration.
• Comfort with ambiguity and bias toward action.

Nice-to-haves

• Familiarity with AI or LLM tools
• Experience with growth at a startup or scaling product.
• Knowledge of SEO, CRM tools (Braze, HubSpot), or marketing automation.

Why You’ll Love Working at Apollo

At Apollo, we’re driven by a shared mission: to help our customers unlock their full revenue potential. That’s why we take extreme ownership of our work, move with focus and urgency, and learn voraciously to stay ahead.

We invest deeply in your growth, ensuring you have the resources, support, and autonomy to own your role and make a real impact. Collaboration is at our core—we’re all for one, meaning you’ll have a team across departments ready to help you succeed. We encourage bold ideas and courageous action, giving you the freedom to experiment, take smart risks, and drive big wins.

If you’re looking for a place where your work matters, where you can push boundaries, and where your career can thrive—Apollo is the place for you.