Hiring an API developer

An API (Application Programming Interface) is a set of rules that defines how software applications communicate with each other. It acts like a digital bridge, allowing systems to exchange data and share functions without knowing each other’s internal workings. From retrieving product information and processing payments to synchronizing customer data, APIs make all of this possible.

An experienced API developer considers factors such as logical data structure, optimal performance, and strong security. API development requires close collaboration with software teams, designers, and testers. This ensures connections that not only work perfectly from a technical standpoint but also streamline business processes and enhance user experiences.

Collaboration model

Developing an API requires not only technical knowledge but also a collaboration model that fits your project and timeline. In some cases, it makes sense to agree on a fixed price for your API development, especially when the end goal is clear and the budget is well-defined. Costs can range from a few hundred to several thousand euros for simple connections, up to €50,000 or more for complex, custom API architectures with multiple integrations.

Is your project still in development, or do you want the flexibility to scale? In that case, it is often more practical to hire an API developer on an hourly basis. You can choose a freelancer or a developer who temporarily joins your team, depending on your needs.

Average hourly rates for API developers

• Junior API developer > €30 to €50 per hour
  Works on simple API endpoints and extensions, often under the guidance of an experienced developer.
• Mid-level API developer > €50 to €100 per hour
  Can independently build complex API connections, contributes to API design and optimization.
• Senior API specialist > €100 to €150 per hour
  Has years of experience, designs scalable API architectures, solves complex technical challenges, and mentors teams.

Don’t just look at the developer’s rate, also consider their experience with the technologies and standards that are important for your project.

At 3Bird, we offer hourly rates starting from €25–€30 and provide flexible options.

Whether it’s building a new API or improving an existing connection, the right API developer can make the difference between “it works” and “it works perfectly.” A strong developer ensures that systems communicate seamlessly, data is exchanged quickly and securely, and your infrastructure is ready for growth. But note: it’s not just about technical skills.

Step 1: Define the profile

Before you start looking for an API developer, it’s important to clearly define what your project requires. This prevents hiring someone who isn’t suited to the technical challenges and ambitions of your API project. Consider not only knowledge of programming languages and API standards, but also skills such as:

• Communication: can the developer clearly explain what is happening?
• Independence: can they design and implement an API on their own?
• Problem-solving: can the developer resolve technical issues quickly and efficiently?

Ask yourself questions like: which API technologies do you want to use (REST, GraphQL, SOAP)? How complex is the intended integration, and what experience level is appropriate? Is knowledge of your industry important for a successful connection? How quickly does the API need to go live?

Step 4: Onboarding

Getting a new API developer up to speed quickly starts with smart onboarding.

• Ensure the developer has immediate access to the right systems, API documentation, and testing environments. This allows work to begin without delay.
• Provide a clear overview of the project: what the API is supposed to do, how it fits within existing systems, and the developer’s role in it.
• Briefly explain the technical foundation, such as the chosen architecture and security standards, so the developer immediately understands why certain decisions were made.
• By also providing a clear point of contact for questions and collaboration, a new API specialist will quickly feel at home and can immediately contribute to a stable and scalable integration.

Of course, simply hiring 3Bird is also an option! This makes it much easier to quickly find a skilled app developer.

Our API developers work from our office in Kathmandu, Nepal, and are fully integrated as permanent members of our organization. They are not freelancers but professionals who collaborate closely with our local CTOs and are fully embedded in our processes and company culture. This ensures clear, seamless communication despite working remotely. This way of working enables efficient and high-quality API development, so your connection or integration project is executed with the same care and precision as if the team were on-site. Thanks to our international setup, you also benefit from excellent value for money and specialized expertise that makes your API stable and scalable.