I Got a 0.5% Raise. So I’m Building a Multitenancy Starter for Spring Boot.

#multitenancy #java #buildinpublic #springboot

I Got a 0.5% Raise. So I’m Building a Multitenancy Starter for Spring Boot.

After spending weekends and late nights scaling a multi-tenant SaaS in FinTech, I received a 0.5% raise.

It said more than words ever could.

But instead of burning out or shutting down, I decided to build in public the very thing I wish existed:

A true Spring Boot Multitenancy Starter — built with clarity, built with pain, built with purpose.

🧱 What I'm Building

I don't want to make another wrapper or a copy-paste blog pattern.

I’m building:

🧠 A thread-safe TenantContextHolder
🔌 Database-per-tenant routing
⚙️ Pluggable resolver strategies
🧰 Runtime onboarding hooks
🩺 Tenant-aware health indicators & logs
✨ Auto-configured like Spring Boot itself

Think: spring-boot-starter-data-jpa — but for multitenancy.

🧠 Day 0: The Ego Kick

It didn’t start with a plan. It started with rage.

I opened ChatGPT and typed:

“If Spring Boot had to build multitenancy the right way — how would it design it?”

Then I fell down the rabbit hole of spring-boot-autoconfigure, conditionals, DataSourceBuilder, and bean registration logic.

I wasn’t looking for a tutorial. I was looking for intent. Design intent. Spring’s kind of intent.

And slowly, the fog started clearing.

🗂️ What I Scaffolded on Day 0

Here’s the first shape:

org.nirvikalpa.multitenancy
├── context/ # Holds TenantContextHolder (ThreadLocal)
├── resolver/ # JWT / Subdomain / Header strategies
├── datasource/ # RoutingDataSource logic
├── config/ # Auto-config magic
└── starter/ # What end users depend on

🔮 Why I’m Building in Public

🧭 It keeps me honest and aligned
💬 Feedback can shape design before it ossifies
🪞 You see not just the final code, but the internal war that built it

This isn’t just about multitenancy. It’s about building with intent instead of reaction.

🔗 GitHub (Day 0 State)

👉 github.com/rahulsb/spring-boot-starter-multitenancy

(still raw, still real — but it's up)

📅 What’s Next?

Finalize the pluggable TenantResolver interface
Decide if we default to JWT or subdomain
Log Ego Entry #002
Publish a Twitter/X launch thread

If you've ever struggled with multitenant systems in Java or wished for a true starter — follow this build. I’m designing in the open, thinking loud, and logging everything.