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 worlds 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 team shaping 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
-
Customer Impact
Deep understanding of product metrics and direct contribution to measurable improvements through agile iteration -
Technical Leadership
Lead complex projects, own key systems, and define roadmaps in collaboration with managers and PMs -
Velocity
Consistent output and high impact, even within challenging, legacy, or high-complexity codebases -
Engineering Quality
Set the standard for code quality and technical excellence on your team -
Cross-Team Communication
Drive alignment across squads and stakeholders through effective communication -
Platform Resilience
Build scalable, monitored, and self-healing systems
with best-in-class availability
Requirements
-
10+ years
of deep experience building and scaling backend systems in production environments - Proven ability to develop features with
performance, reliability, and scalability
in mind - Strong
product intuition
balancing technical scope with MVP delivery - Expertise with
message queues, background jobs, and distributed system patterns
- Familiarity with
observability tools
(e.g., GCP Logging, Prometheus, NewRelic) - Demonstrated ability to leverage
AI tools
(e.g., code generation, debugging, automation) and stay current with emerging AI trends - Experience with
LLM architecture, pipelines, or applied AI tooling
is a strong bonus
Nice to Have
- Bachelor s degree in Computer Science or related field (or equivalent experience)
- Proficiency in one or more
general-purpose programming languages
(e.g., Java, Python, Ruby, Go) - Experience integrating with
third-party APIs
, including handling rate limits, failure cases, and retries gracefully
Example Challenges You ll Tackle
-
Scaling Workflows Platform
Help us turn Workflows into a plug-and-play automation platform
where new triggers, actions, and integrations can be added in hours, not weeks. -
Fault-Tolerant Infrastructure
Design the backbone of a high-scale, event-driven system
that guarantees reliability, speed, and safety at massive scale. -
Agentic Automation & Adoption
Lead the roadmap for next-gen agentic automation
and build tooling that empowers every team at Apollo to move faster with confidence.
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 youre energized by finding smarter, faster ways to get things done using AI and automation, youll 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!
