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
recurring membership billing to point-of-sale retail. As a senior backend
developer on our revenue operations team, you'll own the payment and billing
infrastructure that keeps transactions secure, accurate, and reliable across
dozens of markets.
You'll work directly with global payment gateways, PCI compliance, and financial
data at scale, using AI coding tools like Cursor to move fast without
compromising security.
What you'll do
* Architect integrations with global payment gateways, including Stripe and
Razorpay, to handle recurring subscriptions, retail transactions, and refunds
* Build reliable webhook processing and idempotency safeguards that prevent
duplicate charges and keep transactions consistent
* Design and maintain REST APIs in .NET Core that support our Angular and
Flutter apps
* Enforce PCI-DSS compliance through server-side tokenization and secure
credential vaulting, so raw card data never touches our servers
* Build event-driven services with Apache Kafka to keep financial ledgers and
billing states in sync in real time
* Architect data models and optimize MySQL performance across a multi-tenant
platform
* Use AI coding tools to accelerate delivery of complex financial systems,
while owning the security and maintainability of everything you ship
What you'll bring
* 6 to 8 years of backend engineering experience in a SaaS product
* Deep hands-on expertise in C# and .NET Core
* A strong track record integrating payment gateway APIs, including
subscription lifecycles, webhooks, and multi-currency transactions
* Experience using AI coding assistants in production, with the fundamentals to
debug and support AI-generated code in sensitive financial workflows
* Solid relational database s
📌 Senior Backend Developer (Mumbai)
🏢 Daxko
📍 Mumbai