Senior Backend Developer (.Net)

Posted 2 Days Ago
Be an Early Applicant
Mumbai, Maharashtra, IND
In-Office
Senior level
Fitness • Healthtech • Information Technology • Payments • Software
Powering every wellness journey.
The Role
Own and develop scalable .NET Core backend services and REST APIs for a multi-tenant fitness platform. Responsibilities include MySQL schema and query optimization, Kafka event-driven integrations, secure API architecture, automated testing, technical leadership, code reviews, and solving complex backend problems. The role also involves responsible use of AI coding tools and collaboration supporting Angular and Flutter applications.
Summary Generated by Built In
Daxko builds the software that powers fitness, wellness, and community organizations—everything from member management and payments to digital engagement and analytics. From small studios to the largest associations, we help thousands of fitness businesses streamline operations, enhance member experiences, and drive sustainable revenue growth.
You'll join Grip Technologies Pvt. Ltd., a Daxko subsidiary, working on FitnessForce, the club management platform used by gyms and fitness businesses around the world.

About the role

FitnessForce runs the daily operations of gyms and fitness clubs globally, from member check-in to point-of-sale retail. As a senior backend developer on our core team, you'll own the services and APIs that keep this multi-tenant platform fast, secure, and reliable at scale.

We build with AI as part of our everyday workflow. You'll use tools like Cursor to move faster, while staying fully accountable for the quality, security, and design of everything that ships.

What you'll do
  • Design, build, and maintain scalable, secure REST APIs in .NET Core that support our Angular web app and Flutter mobile app
  • Architect data models and optimize query performance in MySQL, keeping data isolated and available across a multi-tenant platform
  • Build and maintain event-driven services with Apache Kafka to keep data in sync across our integrated systems in real time
  • Lead the technical build-out of core features, including cross-club access, retail workflows, and global integrations
  • Use AI coding tools to speed up development, while owning the maintainability, security, and architecture of everything you ship
  • Grow automated test coverage across backend services to keep releases stable and regression-free
  • Review code, unblock the backend team on hard problems, and set the standard for clean, maintainable engineering

What you'll bring
  • 6 to 8 years of backend engineering experience, ideally in a SaaS product
  • Deep hands-on expertise in C# and .NET Core
  • Experience using AI coding assistants in production work, with the engineering fundamentals to review, refactor, and stand behind AI-generated code
  • Strong relational database skills, including schema design, transactions, and query optimization in MySQL
  • Experience building multi-tenant systems and working with event-streaming platforms like Kafka
  • A track record of building secure, well-versioned APIs and untangling complex business logic

Nice to have
  • Familiarity with Docker, container registries, and standard CI/CD pipelines
  • Experience in the fitness, club management, or membership software industry
  • Exposure to how backend APIs connect with Flutter and Angular front ends

Skills Required

  • 6 to 8 years of backend engineering experience, ideally in a SaaS product
  • Deep hands-on expertise in C# and .NET Core
  • Experience using AI coding assistants in production work
  • Engineering fundamentals to review, refactor, and take ownership of AI-generated code
  • Strong relational database skills, including schema design, transactions, and query optimization in MySQL
  • Experience building multi-tenant systems
  • Experience with event-streaming platforms such as Kafka
  • Track record of building secure, well-versioned APIs and handling complex business logic
  • Familiarity with Docker, container registries, and standard CI/CD pipelines
  • Experience in the fitness, club management, or membership software industry
  • Exposure to backend APIs connecting with Flutter and Angular front ends

Daxko Compensation & Benefits Highlights

The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Daxko and has not been reviewed or approved by Daxko.

  • Leave & Time Off Breadth Time off options such as unlimited PTO, paid holidays, and paid parental leave are prominently offered, and these policies are often experienced positively. Flexible scheduling and volunteer days are also noted as part of the package.
  • Wellbeing & Lifestyle Benefits Wellness support includes fitness reimbursements and an Employee Assistance Program, alongside remote and flexible work options. These elements are frequently highlighted as supporting work–life balance.
  • Healthcare Strength Health coverage is presented as comprehensive with medical, dental, and vision plans and is often viewed favorably. Employer materials emphasize strong coverage paired with wellness-oriented perks.

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The Company
HQ: Birmingham, AL
800 Employees
Year Founded: 1998

What We Do

Daxko powers health and wellness throughout the world. Every day, our team members bring their passion and expertise to help health and wellness facilities operate smoothly and engage their members. Whether it’s supporting a fitness club, a community center, or a local boutique studio, Daxko is there, powering 40% of fitness and wellness facilities nationwide. We’re more than just a tech company; we’re committed partners, empowering wellness organizations to create meaningful, lasting impact in their communities.

Why Work With Us

At Daxko, you’re more than just an employee—you’re valued. We celebrate diversity, knowing it drives innovation. Your hard work is rewarded with competitive pay, benefits, and flexibility that fits your life. From a month-long break every five years to resources that help you grow, Daxko is where your career and well-being truly thrive.

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