One Pass Solutions, Inc. believes that fitness should be accessible, flexible, and tailored to fit your lifestyle. We provide an all-in-one membership that gives you unlimited access to thousands of gyms, fitness studios, online workouts, and even grocery delivery – all through a single monthly subscription.

With One Pass, you can work out on your own terms. Whether you prefer hitting the gym, participating in live online fitness classes, or exploring on-demand workouts at home, we’ve got you covered. Our large network includes popular gym partners like Anytime Fitness, Crunch, LA Fitness, Orangetheory Fitness, and many others, allowing you to choose how and where you get active.

In addition to fitness, we help you fuel your health journey by offering convenient grocery delivery right to your door, so you can easily access nutritious food and stay on track with your wellness goals.

One Pass Solutions, Inc. was founded in 2017 by Optum, a subsidiary of UnitedHealth Group. In early 2025, One Pass Solutions, Inc. spun off and is now operating as a separate entity.

One Pass Solutions, Inc. has two products,One Pass andOne Pass Select, which is offered through insurance partners and employers.

The Role

The Senior Software Engineer, Backend will be responsible for designing, developing, and maintaining scalable, high-performance backend systems and services. You will work with cutting-edge technologies and collaborate closely with cross-functional teams to create innovative solutions. You will also mentor junior engineers, provide technical leadership, and contribute to the overall architecture and strategic direction of our backend systems.

Key Responsibilities

• Design, implement, and maintain backend services and APIs that are scalable, secure, and efficient.

• Write clean, maintainable, and well-documented code in Scala, ensuring the reliability and performance of the system.

• Collaborate with other engineers, product managers, and cross-functional teams to ensure timely and high-quality delivery of features.

• Architect, deploy, and manage cloud-based solutions using AWS services.

• Ensure that backend systems are highly available, fault-tolerant, and optimized for performance.

• Monitor application performance, set up alerts, and analyze logs to ensure uptime and reliability.

• Identify performance bottlenecks and take proactive steps to optimize systems for better scalability and user experience.

• Manage and maintain code repositories using GitHub, ensuring proper version control, code reviews, and pull requests.

• Continuously improve the backend architecture, services, and infrastructure for better performance, security, and scalability.

• Provide technical leadership and guidance to junior engineers on best practices, design patterns, and code quality standards, to help them grow technically and professionally.

About You

• 7-10+ years of experience in backend software engineering.

• Bachelor’s degree in computer science, engineering, or related field.

• Proficiency with Scala, with a strong understanding of object-orientated programming (OOP), design patterns, and frameworks.

• Solid experience designing and implementing scalable distributed systems.

• Experience with RESTful APIs, microservices architecture, and event-driven architectures.

• Experience using Datadog for monitoring, logging, and performance optimization.

• Strong familiarity with GitHub for version control, pull request, and collaboration within a distributed team.

• Experience with relational databases (Postgres, MySQL, MariaDB).

• Experience with containerization (Docker, Kubernetes) and microservices deployment.

• Knowledge of cloud platforms (AWS) and cloud-native development.

• Experience with CI/CD pipelines, automation, and DevOps practices.

• Proven ability to solve complex engineering problems, with a focus on system design, performance, and scalability.

• Strong communication skills with the ability to work collaboratively with cross-functional teams.

One Pass Solutions, Inc. commits to provide a work environment free of discrimination and harassment, as well as equal employment opportunity regardless of race, color, ancestry, religion, sex, national origin, sexual orientation, age, citizenship, marital status, disability, gender identity or Veteran status. You may view all of One Pass Solutions, Inc.’srecruiting notices here, including our EEO policy, recruitment agency policy, recruitment scam notice, and important E-Verify information.