Back End Developer

The Role

We are looking for aSenior Backend Developerwho can own the Spring Boot backend architecture, guide the team, and build reliable systems end-to-end. A major immediate focus will be designing and implementing CredX'spayment and billing architecture, including base plans, role-based seats, recurring subscriptions, mid-cycle upgrades, proration, webhook handling, and backend-controlled entitlements.

This role is not only about payments. We need a strong backend engineer who can own core product architecture across billing, verification, RBAC, hiring workflows, and system reliability.

Role Responsibilities

• Own and build backend services usingJava, Spring Boot, MySQL, and REST APIs.
• Design scalable backend architecture for billing, verification, hiring workflows, users, roles, and admin systems.
• Build and maintain payment architecture usingStripe and/or Razorpay.
• Design billing flows for subscriptions, seat management, upgrades, downgrades, proration, renewals, and failed payments.
• Implement secure webhook handling with signature verification, idempotency, event logs, and payment reconciliation.
• Ensure backend is the source of truth for plans, seats, entitlements, and paid feature access.
• Design and enforce RBAC across Super Admin, Admin, Hiring Manager, Recruiter, and other user roles.
• Build secure APIs with proper authentication, authorisation, validation, and error handling.
• Design clean database schemas, indexes, transactions, and audit logs.
• Set clear API contracts for frontend developers before implementation.
• Review junior developers' code and guide them on architecture, debugging, and best practices.
• Own delivery from development to deployment, including production reliability and issue resolution.

Key Requirements

• 3+ years of backend engineering experience with strongJava and Spring Boot.
• Strong hands-on experience building production-grade REST APIs.
• Deep understanding ofMySQL, schema design, transactions, indexes, and performance tuning.
• Experience with authentication, authorization, JWT, Spring Security, and RBAC.
• Real payment gateway experience withStripe, Razorpay, or similar billing systems.
• Understanding of subscription lifecycle, webhooks, proration, recurring payments, invoices, and failed payment handling.
• Ability to design backend-controlled entitlement systems for paid plans and seats.
• Strong understanding of secure backend development and data integrity.
• Ability to guide junior developers and make architectural decisions independently.
• Experience taking features from requirement discussion to production release.

Preferred

• Experience with SaaS billing, seat-based pricing, or subscription platforms.
• Experience with Stripe Billing, Razorpay Subscriptions, Razorpay Orders, or similar payment systems.
• Experience with verification/KYC/document-processing systems.
• Experience with multi-tenant SaaS platforms.
• Hands-on experience with Azure deployments, storage, and environment configuration.
• Familiarity with Angular frontend integration and API contract planning.
• Startup experience where ownership, speed, and reliability matter equally.