Niraj Nandane

SDE3 - Staff - Principal Engineer

Fortinet

11.2018 - 03.2025

Designed and implemented a global SaaS control plane for tenant authentication (SAML, JWT, certificate), automated tenant onboarding, and RBAC using the deployment stamp pattern, enabling secure and isolated multi-tenant operations.
Architected a scalable SaaS platform with multiple data planes per region, ensuring tenant isolation, high availability (PostgreSQL, RabbitMQ, Redis), and a seamless path to multi-region expansion.
Built a multi-tenant licensing platform supporting trial and subscription tiers, with automated enforcement of entitlements (execution limits, rate limits, push events). Implemented a distributed entitlement scheduler to ensure real-time compliance and scalability.
Designed and implemented schema-based logical partitioning in PostgreSQL, with storage monitoring and operational policies.
Developed a scalable, multi-tenant WebSocket service using Django Channels to enable secure, real-time communication across tenants.
Designed and built a multi-tenant metrics service to track counts, rate-based metrics, and request patterns, powering rate limiting, and dynamic auto-scaling of microservices in Kubernetes.
Established graceful shutdown mechanisms, distributed logging, and integrated observability with Grafana, improving debuggability and reliability.
Designed HA for on-premise workloads with PostgreSQL streaming replication, cluster lifecycle management (join/leave, failover detection, resync, upgrades), and operational fire drills for resiliency validation.
Migrated the legacy on-premise application to Docker and EKS, enabling modern deployment and scalability.
Mentored junior engineers in best practices for problem-solving, fostering professional growth and development within the team.

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