Senior Backend Engineer II

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.

Your Role & Mission

As a Senior Backend Engineer at Apollo, you'll be a critical part of a fast-growing company, working on a cross-functional team to build highly scalable systems and set the bar for how we engineer. The way we build has changed: this is an AI-native role. We're not looking for someone who also uses AI, we're looking for someone who thinks with it, forms their own hypotheses, pressure-tests what AI produces, catches its errors, and design more robustly than they could alone.

You'll work in an open, collaborative environment, give and receive hands-on mentorship, and have real opportunities to grow. You'll interface daily with design, front-end, analytics, product, and teams beyond Engineering. You enjoy working cross-functionally to solve hard problems and make an impact. You strive for quality, are obsessed with improving it, automation, monitoring, squashing the bugs that sneak through and you're always investigating performance improvements and better ideas.

Daily Adventures & Responsibilities

• Design and implement highly scalable, highly available backend services with proper monitoring and alerting in place

• Ramp quickly into large, unfamiliar codebases, de-risk your changes, understand blast radius, and ship with confidence

• Use AI as a core part of your workflow: generate and pressure-test approaches, verify and catch AI's mistakes, and stand behind the quality of the code you ship with it