Staff Backend Engineer

Staff Backend 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.

As a Staff Software Engineer at Apollo , you'll be responsible for leading the technical direction and execution of complex, high-impact initiatives that span teams and systems. Your influence will extend beyond your immediate teamshaping architectural decisions, elevating engineering practices, and mentoring future leaders.

Responsibilities

• Architect and build scalable, high-availability systems that run 24 / 7 and support mission-critical workflows
• Own and deliver multi-tier, high-volume applications with performance, accessibility, and resilience in mind
• Write high-quality, maintainable code with a strong focus on developer experience and system performance
• Drive and uphold engineering best practices, including code reviews, test coverage, monitoring, and observability
• Provide technical leadership across cross-functional teams, guiding architecture, trade-offs, and execution
• Mentor and sponsor engineers to grow their impact and deepen engineering culture
• Lead large-scale, cross-team projects from concept to production
• Deliver clear, objective feedback to peers and junior engineers through structured reviews and 1 : 1s

Outcomes You'll Drive

Requirements

Nice to Have

Example Challenges You'll Tackle

We Are AI Native

Apollo.io is an AI-native company built on a culture of continuous improvement. We're on the front lines of driving productivity for our customersand we expect the same mindset from our team. If you're energized by finding smarter, faster ways to get things done using AI and automation, you'll thrive here.

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 corewe'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 thriveApollo is the place for you.