Custom API & Backend Development
Secure, scalable infrastructure to power your digital business.
I build the backend systems and APIs that serve as the engine for your mobile apps and websites. Designed to handle real traffic and complex business logic, my backends ensure your product runs securely and scales easily as you get more users.
Every project is different. Book a free consultation to talk about your idea, scope, and timeline.
or send a messageWhat Is Custom API & Backend Development?
I build the backend systems and APIs that serve as the engine for your mobile apps and websites. Designed to handle real traffic and complex business logic, my backends ensure your product runs securely and scales easily as you get more users.
Technologies I Use
What Sets My API & Backend Work Apart
Production-Ready from Day One
I build to ship, not to demo. Every project is structured for real-world usage, scalability, and long-term maintainability.
Clear Communication
You get regular updates, clear explanations, and zero surprises. I explain technical decisions in plain language.
Deep API & Backend Expertise
Years of focused API & Backend work means I have seen the common pitfalls, and I know how to avoid them from the start.
Pragmatic Problem Solving
I choose the right tool for the job, not the trendiest one. Your requirements drive the architecture.
The Development Process
System Architecture
Designing the database and planning how the data will flow before writing code.
Security Setup
Setting up strong authentication and making sure your user data is encrypted and safe.
API Engineering
Building endpoints that are fast and well-documented so your frontend team can easily use them.
Third-Party Integrations
Connecting your system to external tools like Stripe, Twilio, or older enterprise software.
Performance Testing
Testing the system to make sure it does not crash when you get a spike in traffic.
Deployment
Setting up automated deployments and real-time error tracking.
Case Studies & Portfolio
CopVPN: Fast & Secure VPN
A military-grade virtual private network application for iOS and Android built to deliver fast, secure, and encrypted in...
iPlum: VoIP Business Phone System
A secure, HIPAA-compliant business phone system providing virtual phone numbers, texting, voicemail, and call recording ...
What Clients Say
“I am writing this testimonial to express my utmost satisfaction and appreciation for the exceptional work delivered by Anas on our Kotlin project. Anas’s commitment to excellence was evident in every line of code he wrote. He consistently delivered high-quality, efficient, and robust solutions, ensuring that the project’s objectives were met with precision. What stood out the most was Anas’s proactive communication and collaborative spirit. He regularly updated us on the progress of the project, addressed any concerns promptly, and was always open to feedback. I wholeheartedly recommend him to anyone seeking a skilled and reliable Kotlin developer.”I am writing this testimonial to express my utmost satisfaction and appreciation for the exceptional work delivered by Anas on our Kotlin project. Anas’s commitment to excellence was evident in every line of code he wrote. He consistently delivered high-quality, efficient, and robust solutions, ensuring that the project’s objectives were met with precision. What stood out the most was Anas’s proactive communication and collaborative spirit. He regularly updated us on the progress of the project, addressed any concerns promptly, and was always open to feedback. I wholeheartedly recommend him to anyone seeking a skilled and reliable Kotlin developer.
“I am really satisfied with his work. This is exactly what our business has been lacking. Highly Recommend this guy.”I am really satisfied with his work. This is exactly what our business has been lacking. Highly Recommend this guy.
“Just received the delivery, it is as great as I expected. Even more than that. I had a really really good experience with Anas. All aspects of the app regarding designs, user experience, development and till publishing, I am very happy. Definitely will hire Anas again from my future projects. 100% recommended to all.”Just received the delivery, it is as great as I expected. Even more than that. I had a really really good experience with Anas. All aspects of the app regarding designs, user experience, development and till publishing, I am very happy. Definitely will hire Anas again from my future projects. 100% recommended to all.
Frequently Asked Questions
What backend tech stack and databases do you recommend for scalable cloud apps?
I architect backends using Node.js/TypeScript, Python, or Go, paired with PostgreSQL for structured relational data, MongoDB for unstructured documents, and Redis for caching and session management. Services are containerized with Docker and deployed to AWS or GCP.
How do you protect backend APIs, user authentication, and sensitive data?
I implement OWASP security standards: salted password hashing (Argon2/bcrypt), signed JWT tokens stored in httpOnly secure cookies, SQL injection prevention via parameterized ORMs, rate limiting, and end-to-end encryption in transit (HTTPS/TLS) and at rest (AES-256).
Can you audit, profile, and fix slow backend bottlenecks and database queries?
Yes. I specialize in backend performance audits: identifying slow N+1 queries, creating missing composite database indexes, configuring connection pooling, and adding Redis caching layers to reduce API response times to under 50ms.
Do you provide automated OpenAPI/Swagger documentation for backend APIs?
Always. Every API endpoint includes automated Swagger/OpenAPI interactive documentation, TypeScript client definitions, and Postman collections for seamless frontend and mobile team integration.
How do your backend architectures handle sudden traffic surges and millions of requests?
I design stateless backend services with connection pooling, Redis caching, and automated cloud scaling on AWS (ECS / Lambda) or Docker containers to effortlessly absorb large traffic spikes.
Ready to Start Your
API & Backend Project?
Choose how you would like to connect. Send a message with your project scope or pick a time on my calendar for a free 30-minute technical discovery call.
Send a Project Inquiry
Tell me what you are looking to build and I will reply within 24 hours with architecture ideas and a timeline estimate.
Prefer Hiring via Upwork, Fiverr, or Toptal?
Need the security of milestone escrow, platform contracts, or top-tier vetted talent? You can hire me directly through my Top Rated Upwork profile, order my verified Fiverr gig with seamless checkout, or engage through Toptal.