Multi-tenancy
Show where Multi-tenancy affected a real decision in the project. Include the implementation, constraint, test or measurement that makes the skill verifiable.
CAREER PROJECT · Advanced · 2–3 weekends
Multi-Tenant SaaS API
Design tenant isolation, quotas, audit logs and admin controls for a shared service.
Multi-tenancySQLAuthorizationQuotasAudit logs
WHAT THIS PROJECT PROVES
Make the engineering visible.
This brief is designed as portfolio evidence for a Backend Developer path. The goal is not to claim a hiring outcome; it is to make your implementation, judgment and tradeoffs easier to inspect.
SQL
Show where SQL affected a real decision in the project. Include the implementation, constraint, test or measurement that makes the skill verifiable.
Authorization
Show where Authorization affected a real decision in the project. Include the implementation, constraint, test or measurement that makes the skill verifiable.
Quotas
Show where Quotas affected a real decision in the project. Include the implementation, constraint, test or measurement that makes the skill verifiable.
Audit logs
Show where Audit logs affected a real decision in the project. Include the implementation, constraint, test or measurement that makes the skill verifiable.
BUILD PLAN
Finish the core before expanding the scope.
Use this as a project sequence, not a rigid tutorial. Your stack can change; the evidence should still show what you built, why you built it that way and how you know it works.
Define the scope and success criteria
Turn the brief into a small finishable system. Decide what the core Multi-Tenant SaaS API must do, what you will deliberately leave out, and how you will show that it works.
Build the core workflow
Design tenant isolation, quotas, audit logs and admin controls for a shared service. Keep the first pass focused on the main user or system flow before adding stretch features.
Add engineering proof
Create tenant model and api. Document the decisions, failure states, tests, performance, security or operational tradeoffs that matter for this project.
Ship and package the evidence
Publish the strongest artifacts, including isolation tests, admin controls, threat model. Make it easy for a reviewer to understand the problem, architecture, tradeoffs and what you personally implemented.
PORTFOLIO PROOF CHECKLIST
Leave artifacts a reviewer can inspect.
A strong project page should make it possible to understand the system without guessing what you personally built.
01
Tenant model
02
API
03
Isolation tests
04
Admin controls
05
Threat model
06
A concise README explaining the problem, architecture and tradeoffs
07
A working demo, API example or reproducible run path
08
Evidence of testing, monitoring, performance, accessibility or reliability where relevant
RESUME / PORTFOLIO FRAMING
Describe what you actually did.
Designed a multi-tenant API with tenant isolation, quota enforcement, auditability and permission controls.
Use this as a starting structure, then replace it with your real implementation details, metrics and constraints. Do not claim outcomes you did not measure.
INTERVIEW TALKING POINTS
Be ready to defend the decisions.
These prompts turn the project from a repository link into a technical conversation about judgment, tradeoffs and evidence.
Why did you choose your approach to Multi-tenancy, and what alternative did you reject?
Answer with details from your implementation. Prefer concrete constraints, measurements and alternatives over generic best practices.
Where could Multi-Tenant SaaS API fail under real usage, and how would you detect or recover from that failure?
Answer with details from your implementation. Prefer concrete constraints, measurements and alternatives over generic best practices.
How did SQL affect the rest of the design?
Answer with details from your implementation. Prefer concrete constraints, measurements and alternatives over generic best practices.
What did you measure or test to prove Audit logs instead of only claiming it?
Answer with details from your implementation. Prefer concrete constraints, measurements and alternatives over generic best practices.
If you had one more week, what would you improve first and why?
Answer with details from your implementation. Prefer concrete constraints, measurements and alternatives over generic best practices.
STRETCH GOALS
Go deeper only after the core is solid.
Row-level security
Add it only if it strengthens the engineering story instead of delaying a finished, deployable core.
Usage billing
Add it only if it strengthens the engineering story instead of delaying a finished, deployable core.
Tenant exports
Add it only if it strengthens the engineering story instead of delaying a finished, deployable core.
RELATED PORTFOLIO PROJECTS
Build another signal in the same path.
Choose another project only when it proves a different part of the role instead of repeating the same evidence.
Intermediate1–2 weekends
Production API + Rate Limiter
Ship an authenticated API with persistence, Redis-backed throttling, tests, monitoring and deployment.
API designPostgreSQLRedisDockerObservability
Open project brief →Advanced2 weekends
Event-Driven Order Service
Build order processing with queues, retries, idempotency and dead-letter handling.
QueuesIdempotencyEventsReliabilitySQL
Open project brief →Intermediate1 weekend
Authentication + Permissions Service
Implement sessions or tokens, role permissions, password reset and audit events.
AuthenticationAuthorizationSecuritySQLTesting
Open project brief →