Senior API Integration Engineer

Join ABC Fitness, the leading technology provider for the fitness industry

Job Description

Join ABC Fitness and become part of a culture that's as ambitious as it is authentic. Let's transform the future of fitness—together

Our Values

Best Life

We believe great work begins with great people. That's why our culture is built on respect, trust, and belonging. We create an inclusive environment where every team member can bring their authentic self to work—because diverse perspectives drive innovation and meaningful impact.

Growth Mindset

We are doers, thinkers, and dreamers. At ABC Fitness, your growth is our investment. Through continuous learning, mentorship, and professional development opportunities, we empower you to reach new heights—personally and professionally.

One Team

From day one, you'll be part of a team that collaborates, celebrates, and cares. We move fast, support one another, and have fun along the way. Because when you thrive, we all thrive.

The Senior API Integration Engineer will play a key role in supporting and advancing ABC Fitness Solutions' suite of API offerings, including Glofox, Ignite, Trainerize, Commerce, and Gymsales. This role will focus on ensuring seamless integrations between ABC products and third-party systems while providing technical guidance to customers and partners. The engineer will collaborate cross-functionally with internal engineering teams, customer success, and integration partners across the globe.

Key Responsibilities

• Serve as a subject matter expert for ABC's API and Webhook products, ensuring reliable, secure, and efficient integrations with external systems.
• Collaborate directly with customers and integration partners to troubleshoot, optimize, and enhance API- and Webhook-based integrations.
• Design, test, and document new API and Webhook workflows using tools such as Postman and API automation frameworks.
• Support authentication schemes and ensure secure data transmission between systems (e.g., OAuth 2.0, API keys, JWT).
• Partner with internal product and engineering teams to identify and resolve API or Webhook issues, escalate complex problems, and contribute to product improvements.
• Monitor and maintain existing integrations to ensure system stability and performance.
• Provide technical feedback and recommendations to improve the developer experience and integration documentation.
• Participate in continuous improvement efforts to automate testing, deployment, and validation of APIs.
• Coach and mentor teams on RESTful API design principles and best practices, ensuring consistency in standards across both API and Webhook implementations.
• Maintain strong communication with global stakeholders and customers, providing timely updates and detailed technical insights.

Required Knowledge, Skills, and Experience

• Bachelor's degree in Computer Science, Engineering, Information Systems, or related field (or equivalent work experience).
• 5–8 years of experience in API and Webhook development, integration, or related engineering roles.
• Strong English communication skills, both written and verbal, with the ability to interact professionally with global customers and partners.
• Demonstrated experience using API and Webhook testing tools such as Postman and test automation frameworks.
• Solid understanding of RESTful APIs, Webhook architectures, authentication protocols (OAuth 2.0, JWT, API keys), and error handling best practices.
• Familiarity with modern integration and event-driven technologies such as Kafka, AWS SNS/SQS, and API management tools (Gravitee, Kong, Apigee, or AWS API Gateway) preferred.
• Experience with integration billing systems such as Chargebee is a plus.
• Strong troubleshooting and analytical skills, with a methodical approach to problem-solving.

Core Competencies (Aligned with ABC Values)

One Team

• Collaborates effectively with colleagues across regions and functions to deliver best-in-class solutions.
• Demonstrates empathy and respect in all interactions, fostering a culture of inclusivity and partnership.

Growth Mindset

• Seeks opportunities to learn new technologies and improve integration processes.
• Proactively shares knowledge and encourages experimentation to enhance system reliability and innovation.

Best Life

• Strives for excellence while maintaining balance and promoting well-being in self and others.
• Actively contributes to a positive, supportive, and healthy work culture.

Additional Information

• This role may require occasional flexible working hours to support global integration partners and customers in different time zones.
• This position is part of ABC's global remote-first workforce.

WHAT'S IN IT FOR YOU:

• Purpose led company, committed to help changing people's lives through technology, with a Values focused culture of Best Life, One Team, Growth Mindset
• Days of Disconnect – once a quarter, we take a collective breather and enjoy a day off together around the globe. #oneteam
• Health, dental and life insurance
• Meal & home office allowance
• App for monthly subscriptions to access gyms and studios.
• Educational partnership with great discounts in colleges, English schools and others
• Consigned loan paid directly through your payroll
• EAP – we get you psychological, legal, and financial assistance when you need it. Period.
• And more – so many benefits we couldn't even fit them all here

At ABC Fitness, we don't just build technology—we build communities and transform lives. Your work matters here, your growth is supported, and your voice is heard. We welcome diverse talent and encourage you to apply, even if you don't meet every requirement.

ABC'S COMMITMENT TO DIVERSITY, EQUALITY, BELONGING AND INCLUSION:

ABC is an equal opportunity employer committed to diversity, equity, and inclusion. We strive to create a workplace where every employee, client, and partner feels valued, inspired, and empowered to reach their full potential. For us, inclusion isn't just the right thing to do—it's a business imperative. Learn more at

About ABC Fitness

ABC Fitness is the #1 software provider for fitness businesses of any size, all around the world. Supporting 30K clubs, 650K coaches, 40M members, and processing more than $12B in payments every year, ABC Fitness provides scalable, data-driven solutions to simplify club management and engage members and clients.

From personal trainers, boutique studios, and gyms, to international franchise health clubs, ABC Fitness will move your business forward through technology and industry insights. Innovation is at the center of everything we do, across ABC Glofox, ABC Ignite, ABC Trainerize, and ABC Evo. Let's make your fitness vision a seamless reality, together.

Learn more at

If you like wild growth and working with happy, enthusiastic over-achievers, you'll enjoy your career with us