Backend Software Engineer | Multi-Tenant SaaS | IAM & Application Security | Distributed Systems

I build backend systems for SaaS applications, focusing on secure authentication and authorization, multi-tenant architecture, service integrations, and reliable background processing.

My experience includes identity and access management, session and device security, subscription and billing integrations, and backend systems for e-commerce platforms.

• Languages: PHP, JavaScript, Python, C++, Java
• Backend: Laravel, Node.js, Express.js, Ruby on Rails, REST APIs
• Architecture: Microservices, multi-tenancy, distributed systems, object-oriented design
• Security: Identity and Access Management (IAM), Role-Based Access Control (RBAC), OAuth 2.0, MFA, session management
• Databases & Search: MySQL, PostgreSQL, MongoDB, Redis, OpenSearch, Apache Solr
• Infrastructure: Docker, AWS, Google Cloud Platform, Linux, GitHub Actions

Working on backend services and security capabilities across a multi-product SaaS ecosystem.

• Developing identity and access management and role-based authorization.
• Working on tenant-aware access control and multi-tenant architecture.
• Implementing session security, multi-factor authentication, device management, and authentication workflows.
• Building subscription management and usage-based billing integrations.
• Developing asynchronous jobs, tenant lifecycle operations, and activity tracking.

Worked on e-commerce backend systems and internal business tools.

• Contributed to product discovery and search-driven workflows.
• Worked on product-related features, analytics, and backend integrations.
• Built and maintained internal tools supporting business operations.

• Low-Level Design & Design Patterns — Object-oriented design exercises, including Chess, Parking Lot, and Tic-Tac-Toe.
• LeetCode Solutions — Data structures and algorithms solutions implemented in C++.
• GeeksforGeeks POTD — Solutions to GeeksforGeeks Problem of the Day challenges.
• LeetCode Patterns — Algorithm practice organized around problem-solving patterns.

I’ll add more detailed project documentation and technical demonstrations as they’re reviewed and prepared.

I regularly practice data structures and algorithms, explore low-level design, and improve my problem-solving and system-design skills.

• LinkedIn: Nilesh Gupta
• GitHub: NG-Geeks
• LeetCode: ng404