Senior Backend Developer (.Net)

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.

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

What you need

• 6–8 years in software engineering
• .NET
• SQL
• Kafka
• C#
• REST APIs
• Angular
• Any graduate

Good to have

• Docker
• CI/CD
• Flutter
• POS