I will build custom backend systems and API integrations


About this gig
Need a backend that actually holds up under real traffic and
complex business logic, not just a simple CRUD app?
We build custom backend systems and API integrations for
businesses that need real engineering: connecting multiple
systems together, processing data reliably, and scaling without
breaking.
**What we handle:**
- Custom REST/GraphQL APIs built from scratch
- Third-party integrations (payment gateways, CRMs, external data)
- Database design and optimization
- Secure authentication and authorization
- Performance tuning for high-traffic systems
**What I need from you:**
- A brief description of your system or the problem you're solving
- Any existing documentation, APIs, or systems we need to connect to
- Your preferred tech stack, if you have one (otherwise we'll advise)
**Why work with us?**
Our backend team focuses on the hard problems the parts that
need real engineering, not shortcuts. Due to client confidentiality,
we can't showcase most of our production work publicly, but we're
happy to walk you through our approach and code quality directly.
Let's discuss your system's requirements before you place an
order, so we can scope it accurately.
Get to know Ayman SADA AI
Full Stack Developer, AI and Enterprise Search Engineering
- FromPalestinian Territories
- Member sinceOct 2019
Languages
English, Arabic
My Portfolio
Other Software Development Services I Offer
FAQ
Can you integrate with our existing system/database?
Yes, we specialize in connecting new backend components with your existing infrastructure, whether it's a legacy system, third-party API, or existing database.
Will I own the source code?
Yes, once the project is delivered and payment is complete, you own full rights to the code. Source code delivery is included in Standard and Premium packages.
Can you work with our preferred tech stack?
Our core expertise is Python (FastAPI, Django, Flask), but we're flexible and can discuss your specific requirements before starting.
Why don't you have a public portfolio of past projects?
Most of our backend work is covered by client confidentiality agreements. We're happy to walk you through our approach, architecture decisions, and code samples directly during our first conversation.
How do you handle security for sensitive data?
We follow industry-standard practices for authentication, authorization, and data protection, and can accommodate specific compliance requirements (GDPR, PCI-DSS, etc.) if needed.

