Senior Software Engineer (Hybrid, San Francisco)

Apollo.io; San Francisco (CA); On-site; USD 195,000 - 358,000; Full time

Benefits offered by this job

Equity

401(k) plan

Paid holidays

Flexible PTO

Parental leave

Wellbeing benefits

Travel coverage

Insurance (Life/AD&D/STD/LTD)

Medical, dental, and vision

Job summary

Apollo is seeking engineers to design, build, and scale major systems end-to-end, taking on ambiguous, high-impact problems. You will balance performance, reliability, and cost while driving outcomes across product and design teams.

The role emphasizes ownership, quality, and leveraging AI-assisted development to accelerate delivery. You will work with a stack including React on the frontend and Ruby, Rails, Python, MongoDB, Elasticsearch on the backend, plus Kubernetes, Docker, Terraform, and

Qualifications

• Proven track record of owning and shipping systems at scale.
• Expertise in system design, data modeling, and cost/reliability tradeoffs.
• Ability to lead ambiguous work to clear outcomes.
• Fluency with AI-assisted development and modern tooling.
• High ownership and quality mindset.

Responsibilities

• Own significant systems end-to-end from design to production and operation.
• Break down hard, ambiguous problems and drive to shipped outcomes.
• Own reliability, performance, and cost of the systems you manage.
• Collaborate with product, design, and engineering to solve cross-team issues.
• Raise the quality bar and establish patterns that improve team effectiveness.

Skills

System design

Data modeling

Reliability

Cost optimization

Ownership mindset

AI-assisted development

Tools

React

Ruby on Rails

Python

MongoDB

Elasticsearch

Kubernetes

Docker

Terraform

GCP

Job description

About Apollo

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.

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.

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 for their location during the interview process.

• Additional benefits for this role may include: equity
• company bonus or sales commissions/bonuses
• 401(k) plan
• at least 10 paid holidays per year, flex PTO, and parental leave
• employee assistance program and wellbeing benefits
• global travel coverage
• life/AD&D/STD/LTD insurance
• FSA/HSA and medical, dental, and vision benefits

San Francisco Pay Range

$195,400—$358,300 USD

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 customers—and 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 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.

Learn more here!