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$
USD
I will build secure API infrastructure and backend systems
John K
About this gig
Need a secure API backend that is built for real business use, not just code in a folder?
I will design, build, and launch a full stack API system engineered around your actual needs. This can include FastAPI backend development, Kong API Gateway, Linode/Debian server setup, PostgreSQL or other database integration, authentication, encryption, request logging, and clean documentation.
What can be included:
- Custom REST API development with FastAPI
- Stack engineering based on your business workflow
- Secure authentication with OAuth2/JWT or API keys
- HTTPS/TLS secure transport
- AES-based request/response encryption when needed
- In-depth database audit logging for API requests
- Kong API Gateway setup, routing, and protection
- PostgreSQL/database integration
- Docker/GitHub deployment workflow
- Clean code, API docs, and handoff notes
This is ideal for business systems, internal tools, SaaS MVPs, webhook receivers, dashboards, automation tools, mobile app backends, and secure API integrations.
Please message me before ordering so I can confirm your endpoints, database needs, security requirements, hosting access, and exact scope.
Get to know John K
John K
Full Stack, Systems and Software Engineering
- FromUnited States
- Member sinceApr 2015
- Avg. response time2 hours
- Last delivery7 months
Languages
English
I'm a full-stack developer and IT systems engineer with 15+ years of experience in software, hardware, networking, and business technology. I build production-ready web apps, backend systems, databases, automations, and integrations.
My skills include JavaScript, HTML, CSS, Node.js, Java, C/C++, PHP, Python, VB, MySQL, APIs, Linux, Windows Server, Active Directory, networking, and troubleshooting.
I understand the full stack from UI and backend to databases, servers, operating systems, networks, and business workflows. I build maintainable solutions for real business environments.
Other Software Development Services I Offer
FAQ
Do I need to message you before ordering?
Yes. API projects vary a lot depending on endpoints, database needs, authentication, encryption, hosting, and third-party integrations. A quick message helps confirm the right package and prevents scope issues.
What kind of APIs can you build?
I can build REST APIs for business systems, internal tools, dashboards, mobile app backends, webhook receivers, automation workflows, database lookups, and third-party integrations.
What does stack engineering mean?
It means the API stack is selected and structured around your actual business needs instead of forcing every project into the same setup. Your API may need authentication, logging, encryption, database integration, gateway routing, caching, or deployment automation depending on the use case.
Do you include authentication?
Yes. Depending on the package and use case, I can include API key authentication, OAuth2, JWT-based authentication, or a custom authentication workflow.
Do you include encryption?
Yes. HTTPS/TLS can be used for secure data transport. AES-based request/response encryption can also be added when the API needs an extra encryption layer for sensitive data.
What is API audit logging?
Audit logging stores a detailed history of API activity in the database. This can include endpoint, method, timestamp, user/client, IP address, status code, request ID, error details, and processing time. It is useful for troubleshooting, visibility, and auditing.
Will you log sensitive data?
By default, I avoid storing raw sensitive data in logs. When sensitive tracking is needed, better options include metadata, payload hashes, masked values, or encrypted log snapshots depending on your requirements.
Do you provide the server or Linode account?
No. You provide the hosting account or server access. I can guide you on the recommended Linode VPS size and setup requirements.
Is Redis required?
No. Redis is optional. It is useful for caching, temporary tokens, queues, rate-limit workflows, and faster repeated lookups, but many API projects do not need it.
Can you work with an existing API or codebase?
Yes. I can review, restructure, secure, document, deploy, or extend an existing API depending on the current code quality and project scope.
