Senior Software Engineer, API

About Us

Founded in 2010, and Headquartered in Newport Beach, California, Kajabi is the leading creator commerce platform, helping creators turn their knowledge, experience, and expertise into sustainable online businesses. With Kajabi's integrated platform, creators have a single ecosystem to build and market their digital products, including online courses, communities, live coaching, and more. Tens of thousands of creators and entrepreneurs rely on Kajabi as the backbone of their business and have collectively earned over $9 billion from more than 85 million customers. Learn more at kajabi.com.

API Engineer

Kajabi is seeking a senior full-stack engineer to fulfill a pivotal API role, focusing on the creation, evolution, and expansion of our public-facing API product. We're looking for someone with deep engineering expertise in Ruby backend development, React/JavaScript, API Design, Security, Documentation, and Scaling/Resilience principles. The ideal candidate will thrive in a fast-paced environment, utilizing data-driven experimentation and rapid iteration cycles to continuously enhance our API, ensuring it meets the evolving needs of our users and drives product growth.

The Impact You Will Make

• Identify opportunities for improving Kajabi based on data, research, and your own insight and creativity, particularly by leveraging and extending our existing API ecosystem and identifying opportunities for new API capabilities.
• Proactively explore and integrate cutting-edge AI development tools and methodologies to optimize workflows, enhance code quality, and drive innovation within the team.
• Write clean, simple, well-tested code that is easy to understand and maintain, with a focus on API consistency and performance, and leveraging AI coding assistants (e.g., Claude, Cursor, Windsurf, Devin) for code generation, refactoring, and debugging.
• Design, develop, and collaboratively maintain high-quality, performant, and secure APIs that enable seamless integration across our platform and with external partners.
• Deliver experiments at a high velocity and level of quality to achieve roadmap goals, utilizing AI-assisted development tools to enhance productivity and code quality.
• Build new flows, interfaces and features using JSON::API specification, with a strong emphasis on designing and implementing robust, scalable, and well-documented APIs.
• Create reusable and maintainable systems and abstractions, including defining clear API contracts and ensuring backward compatibility.
• Review code written by other developers both in and outside of your team, providing expert feedback on API design, implementation, and best practices, and potentially using AI-powered code review tools to identify potential issues and suggest improvements.
• Protect our customers, their customers, and Kajabi from financial, brand, and compliance risk.
• Understand our users via our API community, direct customer research, and through CX (Customer Experience) support, leveraging AI-powered tools to accelerate analysis and identify insights.
• Provide technical leadership, feedback and mentorship to other developers.

Attributes for Success

• Strong communication skills and ability to reach out across team boundaries—even to unfamiliar faces—to align on goals, collaborate on APIs, and move work forward without waiting for an invitation.

• Proactively defines its own objectives and executes them independently—essentially functioning like a one-person team without need for close oversight.

• You leverage AI development tools and explore new tools as they become available.

• You are a software engineer who cares deeply about driving business impact via improving user experience.

• You take a thoughtful approach to decision making; knowing when to move fast and when to be cautious.

• You have a results-oriented approach, with an inherent ability to solve complex problems and deliver a high-quality product.

• You feel confident architecting and designing features but ask questions about business requirements as necessary.

• You have strong experience working with our stack:

• Javascript, Ruby / Rails, Postgres, Sidekiq, Redis, Memcached, and Github.

• You are a believer in automated testing, CI/CD, and keeping our platform operationally excellent.

• You've shipped, operated, scaled, and supported applications in a SaaS environment.

• You have experience providing technical leadership across engineering.

• You are resourceful navigating obstacles and know when to timebox efforts.

• You have experience mentoring or teaching other developers.

Why Kajabi

• Build and support software that makes the world a little bit better by empowering thousands of people to help millions of people get a little bit better at... just about everything: We've built a product that people from all walks of life are using to teach just about anything you can imagine, from personal development, to personal finance and investing, to software development, to yoga, or floral arrangement and everything in between and beyond. Whatever your interests, there are likely at least a few customers who are sharing that kind of knowledge with the world, using Kajabi. If you care about teaching, sharing, and helping others, consider your work at Kajabi a force multiplier that will touch the lives of millions of people. You'll learn a thing or two about what it takes to create, market, and sell digital products. You might even be inspired to make a course of your own—we'd love that!
• Work with an incredible group of human beings: "It's the people." That's what everyone seems to say when asked what they like most about working at Kajabi. It's what candidates say when they come and visit the office and meet the team for the first time. We spend a major portion of our lives at work, so above all we try to be good humans, to each other and to our customers.
• Work within a collaborative and high performing cross-functional product team: We've divided responsibility for our app across several cross-functional teams consisting of about 7 to 10 people including a product designer, QA, UX developer, and a few full-stack or backend developers.
• Join us as we enter into a new season of growth: We've been bootstrapped, profitable, and proud since day one. We launched in 2010 with an incredibly successful product. In 2016, we launched the third ground-up rebuild of our core product, one that we plan to shape and grow for many years to come. We have a stable and mature application with thousands of customers that count on us to continuously improve and support each and every feature. We've been able to build a large and successful app with a tiny team, but in this new season, we've divided up our application into more focused areas of responsibility.

Kajabi Team Benefits Package

• Company paid premiums for medical, dental and vision insurance for self and family.
• Company sponsored HSA account.
• Company 401K, 100% match up to 6% of employee contributions.
• Flexible vacation policy.
• Fitness incentives package.
• Company funded mental health resources.
• Wellness perks.

In-Office Requirement Statement

We let the type of work you do guide the collaboration style. That means we're not always working in an office, but we continue to gather for key moments of collaboration and connection.

• This role will need to be in the office for in-person collaboration 2-3 times a quarter and therefore is best situated in the Western Time zones.

Pay Range

At Kajabi we believe the workplace should be equitable, inclusive, and inspiring for every employee. In an effort to provide greater transparency, we are sharing the base salary range for this position. The position is also eligible for equity. Final salary is based on a number of factors including location, travel, relevant prior experience, or particular skills and expertise.

US based applicants only.

$133,500—$178,000 + equity + bonus

How To Apply

Sound like a good fit for you? Click apply, below!

Kajabi LLC is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, gender expression, national origin, disability, age, veteran status, or any other basis protected by applicable law.