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NEXTBIT

Axis 02 · Software engineering

APIs and complex back ends

Robust, documented and secure services, ready for interconnection.

The challenge

Applications that do not talk to each other, exchanges through files or re-keying, and services that falter as soon as load increases.

We design and build the services that power your applications: REST or GraphQL APIs, asynchronous processing, message queues and integrations with third-party systems. NEXTBIT first defines the interface contracts in OpenAPI format, then develops secure, tested and monitored services. Authentication, versioning, rate limiting and logging are part of the design from the start. You receive the source code, API documentation your partners can read, automated tests and operating procedures.

What we do

  • Writing OpenAPI interface contracts or GraphQL schemas
  • Service development in Node.js or Go, with authentication and access control
  • Asynchronous processing and message queues with RabbitMQ
  • Connectors to your existing applications and your partners' systems
  • Logging, metrics and alerts to follow every service in production

Our approach

  1. 01

    Assessment

    Inventory of systems to connect, data flows, volumes and security constraints.

  2. 02

    Interface contracts

    OpenAPI contracts written and agreed with the teams involved, before any line of code.

  3. 03

    Pilot

    A first real flow put into service, with load tests and verification of exchanges.

  4. 04

    Deployment and operations

    Extension to other flows, monitoring, operating documentation and handover to your team.

What you gain

  • Automated exchanges instead of files and re-keying
  • API documentation your partners can actually use
  • Services that handle the load and are monitored
  • Every exchange is logged and verifiable

Frequently asked questions

REST or GraphQL: how do you choose?

It depends on the use. REST suits most integrations between systems and with partners; GraphQL helps when web or mobile applications need widely varying data. The choice is explained in the design file, and both approaches can be used side by side.

How do you secure APIs exposed to the outside?

Through complementary measures: token or certificate authentication, limited rights per client, encrypted exchanges, rate limiting and logging of every call. A security review of the code and configuration is carried out before going into production.

Can you integrate a legacy system that has no API?

Often, yes. Depending on the case, a dedicated connector reads its database, exchange files or screens, and we then expose that data through a modern API. The legacy system keeps running during the transition, without unplanned downtime.

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