I will design, build scalable saas backend infrastructure, production ready apis


Level 2
About this gig
We design and build production-grade SaaS backend systems and APIs using Node.js & TypeScript, focused on scalability, security, and long-term maintainability.
This is not basic CRUD API work. We architect real backend systems that power SaaS products, internal platforms, dashboards, and automation-heavy applications.
We handle:
- Backend architecture & system design
- REST / GraphQL APIs
- Authentication & authorization
- Database schema design
- Scalable infra setup
- Secure integrations
- Queue systems & background workers
- Webhooks & event-driven systems
- Payments, subscriptions & billing logic
- API documentation & deployment
Our approach is engineering-first: clean architecture, strong security practices, and performance-focused builds.
If you need a backend that can scale, handle real traffic, integrate cleanly, and stay maintainable as your product grows we build exactly that.
Best for:
SaaS startups, founders, agencies, internal tools, automation systems, data platforms, and high-scale web products.
Get to know Kartike Singh
Building softwares for making life easier
Level 2
- FromIndia
- Member sinceJul 2020
- Avg. response time1 hour
- Last delivery1 month
Languages
Hindi, English
My Portfolio
Other Software Development Services I Offer
FAQ
What tech stack do you use?
We build everything using Node.js & TypeScript, with production-grade architecture and clean scalable code.
Is this suitable for SaaS products?
Yes. We specialize in SaaS backend systems, auth, APIs, billing logic, automation, queues, and scalable infrastructure.
Do you provide system architecture guidance?
Yes. We help design the full backend architecture before writing production code.
Can you handle complex integrations?
Yes. We build secure integrations with third-party APIs, webhooks, and internal services.
Will the backend be production-ready?
Yes. Our builds follow best practices for security, scalability, performance, and maintainability.
Do you offer long-term support?
Yes. We offer ongoing backend development & infrastructure support.
6 reviews for this Gig
| (6) | ||
| (0) | ||
| (0) | ||
| (0) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Recommend to a friend
- Service as described
Sort By
K 
kay2_designs

United States
Kartike is an amazing teacher! I had no knowledge on MongoDB, and he explained everything so clear that I understood instantly. I will working with him more in the future once I get my feet more wet within Mongo.
Up to $50
Price
1 day
Duration
K 
Seller's Response
Helpful?P 
pabloxy518

United Kingdom
did exactly what I asked for in my discord bot
Up to $50
Price
3 days
Duration
K 
Seller's Response
Helpful?R restovaugh
Repeat Client

Australia
Always diligent and easy to work with. 5 stars!
Up to $50
Price
1 day
Duration
Helpful?I invostech

Canada
Wow... what a pleasure to work through my issue. Super fast, precise, I made a couple of errors in testing the solution, but kartikethehuman was patient and allowed me to restart my test environment with clean data, no problems there. as well, it shows kartikethehuman has proper knowledge of the backend...
K 
Seller's Response
Helpful?L leon379
Repeat Client

United States
Amazing work. This guy is the guy to go to🙌🏻
K 
Seller's Response
Helpful?
6 reviews for this Gig
| (6) | ||
| (0) | ||
| (0) | ||
| (0) | ||
| (0) |
Rating Breakdown
- Seller communication level
- Recommend to a friend
- Service as described
Sort By
K 
kay2_designs

United States
Kartike is an amazing teacher! I had no knowledge on MongoDB, and he explained everything so clear that I understood instantly. I will working with him more in the future once I get my feet more wet within Mongo.
Up to $50
Price
1 day
Duration
K 
Seller's Response
Helpful?P 
pabloxy518

United Kingdom
did exactly what I asked for in my discord bot
Up to $50
Price
3 days
Duration
K 
Seller's Response
Helpful?R restovaugh
Repeat Client

Australia
Always diligent and easy to work with. 5 stars!
Up to $50
Price
1 day
Duration
Helpful?I invostech

Canada
Wow... what a pleasure to work through my issue. Super fast, precise, I made a couple of errors in testing the solution, but kartikethehuman was patient and allowed me to restart my test environment with clean data, no problems there. as well, it shows kartikethehuman has proper knowledge of the backend...
K 
Seller's Response
Helpful?L leon379
Repeat Client

United States
Amazing work. This guy is the guy to go to🙌🏻
K 
Seller's Response
Helpful?
