Browse categories
Explore
Fiverr Pro
English
$
USD
I will develop secure rest apis and third party integrations
Steve Roger
About this gig
Need a secure REST API, a new endpoint, or an integration for your application?
I develop maintainable REST APIs using TypeScript, NestJS, Node.js, PostgreSQL, Swagger, and JWT. I can also work with Spring Boot or FastAPI when required.
My services include:
- API bug fixing and endpoint development
- CRUD resources and database integration
- Authentication, roles, and protected routes
- Validation and structured error handling
- Swagger/OpenAPI documentation
- Third-party REST API integrations
- Webhooks, testing, and basic deployment
Each package has a defined limit of resources, endpoints, integrations, and business rules. Complete backends, microservices, SaaS platforms, ERP systems, payment gateways, electronic invoicing, real-time features, and undocumented APIs require a custom quote.
Please contact me before ordering if you need an external integration or work on an existing project. I will review the documentation, architecture, dependencies, and expected scope first.
Source code is included. Revisions cover adjustments within the approved scope, not new features or endpoints.
English and Spanish communication available.
Get to know Steve Roger
Steve Roger
Fullstack Developer, Web Apps APIs and Automation
- FromPeru
- Member sinceNov 2021
- Avg. response time1 hour
Languages
English, Spanish
Full-Stack Developer with 2+ years of experience building responsive web apps, REST APIs, internal platforms, and business automation solutions. I work with Next.js, React, TypeScript, NestJS, Spring Boot, PostgreSQL, Flutter, Docker, AWS, Azure, and Supabase. I build MVPs, modernize legacy systems, integrate APIs, and improve performance, UX, and maintainability.
Desarrollador Full-Stack con más de 2 años de experiencia en aplicaciones web, APIs REST, plataformas internas y automatización. Desarrollo MVPs, modernizo sistemas, integro APIs y optimizo rendimiento, UX y código.
My Portfolio
Other Software Development Services I Offer
FAQ
What does the Basic package include?
It includes one API fix or one endpoint for an existing resource in your TypeScript backend. It does not include a new project architecture, complete CRUD module, authentication system, or external API integration.
Can you build a complete backend?
Yes. Complete backends, SaaS platforms, ERP systems, marketplaces, microservices, and multi-module applications require a requirements review and a custom offer.
Which technologies do you work with?
My primary stack is TypeScript, NestJS, Node.js, PostgreSQL, and Swagger. I can also work with Spring Boot, FastAPI, Express.js, MySQL, Docker, AWS, and Azure depending on the project.
Is authentication included?
JWT authentication and basic roles are included in the Premium package. Authentication can be added to Basic or Standard as an extra when it fits the approved scope.
Can you integrate any third-party API?
I integrate documented REST APIs when valid documentation, credentials, and access are provided. Payments, invoicing, banking services, undocumented APIs, and complex OAuth flows require a custom quote.
What does a revision include?
A revision covers corrections or adjustments within the approved requirements. New endpoints, resources, roles, integrations, database entities, or changes to the original business rules are additional work.
Can you work on an existing backend?
Yes. I will first review the repository, architecture, framework version, dependencies, database, and code quality. Significant technical debt or incompatible code may require a custom offer.
