SaaS Platform Engineering
- Multi-tenant architecture
- Organization/workspace systems
- Billing-ready design
- Feature gating
SaaS Systems Engineer
Engineering scalable SaaS products, secure APIs, and AI-ready platforms.
I design and build production-grade MERN applications with clean backend architecture, tenant-aware security, automation workflows, and infrastructure that can scale.
architecture — zsh
$ inspect --layers
✓ Tenant Core
✓ Auth + RBAC/ABAC
✓ Billing + Entitlements
✓ API Services
✓ AI Automation Layer
✓ Dockerized Deployments
✓ AWS + Nginx
→ status: production_ready
Ashik Hasan is a Full Stack Engineer focused on building long-term software products, not short-lived feature sets. His work centers on scalable SaaS architecture, secure API design, extensible backend systems, and AI-ready product foundations.
Expertise
From foundations to launch
A horizontal timeline on desktop — stacked stories on smaller screens.
SaaS Platform Engineering
- Multi-tenant architecture
- Organization/workspace systems
- Billing-ready design
- Feature gating
Backend Architecture
- Node.js
- Express.js
- TypeScript
- Controller-service-repository pattern
- MongoDB + Mongoose
Security & Authorization
- JWT access + refresh tokens
- RBAC
- ABAC
- Tenant isolation
- Scoped API keys
AI & Automation
- Chatbot-ready backend
- LLM-ready architecture
- n8n workflows
- Event-driven automation
DevOps & Deployment
- Docker
- Jenkins CI/CD
- AWS EC2/S3
- PM2
- Nginx
- Linux server administration
Stack
Capability matrix
Bento layout — each tile maps to how products are actually built.
Frontend
- React.js
- TypeScript strict mode
- Redux Toolkit
- RTK Query
- Tailwind CSS
- React Hook Form
- Zod
Backend
- Node.js
- Express.js
- TypeScript
- MongoDB
- Mongoose
- REST APIs
- Zod validation
Security
- JWT Auth
- Refresh Tokens
- RBAC
- ABAC
- API Keys
- Tenant Isolation
Infrastructure
-
Docker
Jenkins
AWS EC2
AWS S3
PM2
Nginx
Linux
AI Systems
-
LLM-ready APIs
Chatbot integration
Workflow automation
Event-driven systems
Principles
Built to last
Great software should be easy to evolve, safe to operate, and ready for the next layer of intelligence.
01
Maintainable
Readable modules, clear contracts, sane refactors.
02
Secure
Tokens, tenants, and keys handled with intent.
03
Extensible
APIs and domains that grow with the roadmap.
04
AI-ready
Events and surfaces prepared for intelligent layers.
Have a serious SaaS or AI product idea?
Ashik brings engineering depth and system-level thinking to products that need to scale.
Email Ashik