RESTful API stands for Representational State Transfer Application Programming Interface, a term coined by Roy Fielding in 2000. A RESTful API allows an application to communicate with other applications. It is based on the structure of a website, where the data and information are stored in the form of resources. RESTful APIs make use of these resources to provide a certain level of accessibility and data exchange between different systems. This makes web development more efficient, as resources can be accessed easily and quickly.

A RESTful API Developer is responsible for designing and developing APIs to facilitate communication between different applications. The Developer will use their existing skills in web development to create APIs that are secure and reliable, that can provide clients with the ability to access resources for different types of usage. The Developer will also ensure that the APIs are well documented so that any updates or changes to their backend programming environment don't cause any disruptions with existing communication workflows.

Here's some projects that our expert RESTful API Developer made real:

  • Creating browser extensions using Microsoft Graph API
  • Building webpages for flight searches & results
  • Developing applications for React Native in PHP
  • Retrieving data through various APIs, presenting it in a table format & sending email notifications
  • Developing & integrating simple authentication functions into Laravel apps
  • Integrating WordPress REST APIs into mobile apps via PHP
  • Building middleware systems to convert HTTP GET requests into REST calls
  • Developing programs in C# .NET using the WordPressPCL Package Library
  • Developing cloud services programs using Cloud Flare's API
  • Creating tools to trigger Customer orders with CSV file uploads

At Freelancer.com, our RESTful API Developers are highly experienced professionals dedicated to delivering innovative solutions that meet our clients' specific needs! Our Developers have successfully completed various projects for a wide range of clients, enabling quick and secure data exchange between applications. If you’re looking for an experienced developer to create an efficient, reliable and secure API system, then post your project now and hire the most suitable API developer here on Freelancer.com!

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    17 jobs fundet, i prisklassen EUR

    Project Title: Amazon Seller Partner REST API integration for Orders and Tracking Description: I am looking for a freelancer who can integrate the Amazon Seller Partner REST API for Orders and Tracking. The project requirements are as follows: Integration with : The integration should be specifically with the marketplace. Specific Functionalities: I require specific functionalities for order management rather than full order management capabilities. Preferred programming language: The project should be implemented using VBA. Ideal Skills and Experience: - Strong experience in integrating with the Amazon Seller Partner REST API - Proficiency in VBA programming language - Familiarity with marketplace and its order management system Note: Previous experience with Amazon Seller Partner...

    €159 (Avg Bid)
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    5 bud

    This project aims to develop an integrated solution for a chain of diamond jewelry stores. The solution includes a mobile application for in-store customer engagement, an eCommerce website for online shopping and store locator, and a CRM system for inventory and user management. The application and website will be powered by a unified API that fetches data from the CRM system.

    €11209 (Avg Bid)
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    127 bud

    I need a freelancer to integrate Cyrus Recharge's mobile recharge services into my WordPress website. I have the API and PIN, and I have tested them in Postman. The integration should be fully functional, with plan selection and recharge options. When a customer pays on my WordPress website, the recharge should be done immediately, within seconds. I need the integration to be completed within 1 week and for a budget of up to 2500 INR. Requirements: - Ability to recharge directly on the site - Display of balance after recharge API Provider: - The client will provide the API details manually Design: - The client does not have a specific design in mind and is open to suggestions from the freelancer. However, it should match the current website design. Ideal Skills and Experience: - ...

    €279 (Avg Bid)
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    8 bud

    Create a plugin for woocommerce. In dashboard plugin add User: Password: Token: Gain: Product details add a new field Postal Code This new filed is required to calculate the shipping cost for this product If all products have the same Postal Code the shipping cost will be 1, if two product have different postal code the plugin will calculate the shipping cost from two differente postal code to the client postal code. It's necessary user has to add his postal code in cart to calculate the shipping cost. Then with the product info: weight, length, width and height the plugin will calculate volumetric weight (length * width * height / 5000) and se wich is bigger weight or volumetric weight. in background plugin will do and ajax SOAP to get the available carriers.. The client cand sel...

    €19 / hr (Avg Bid)
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    111 bud

    Hi there, we need you to integrate data coming from our own GPS tracking system (GPSWOX) towards a route provider called PROJECT44. they gave us the documentaion available here, plus the link to test our data: Owner ID: MasSystem

    €30 (Avg Bid)
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    13 bud
    VPN Mobile App 1 dag left

    We are seeking a skilled React Native mobile app developer to join our team and create a VPN mobile app compatible with both Android and iOS platforms. Our timeline for project completion is less than 1 month. UI Design: The desired UI for the app should be similar to the design found at the following link: However, the colour code and logo images will be provided by us. Responsibilities: Collaborate with our team to define app requirements and features. Develop and maintain a secure and user-friendly VPN mobile application. Implement encryption and security protocols to protect user data. Ensure compatibility with both Android and iOS platforms. Work within tight deadlines to deliver high-quality results. Ideal skills and experience for this job include: Proficiency in React Nativ...

    €516 (Avg Bid)
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    54 bud
    Cloud Portal Development 13 timer left
    VERIFICERET

    Cloud Portal Development Features required for the cloud portal: - Customizable user interface Users of the portal: - Both internal and external users Preferred development platform: - Microsoft Azure We are looking for a skilled developer to create a cloud portal with a customizable user interface. The portal will be used by both internal employees and external customers. The preferred development platform for this project is Microsoft Azure. Scope of Work: The scope of work for this freelance project includes but is not limited to the following: Project Kickoff: Conduct a project kickoff meeting with the client to discuss project goals, requirements, and expectations. Requirements Gathering: Collaborate with the client to gather detailed project requirements. Define user stories,...

    €76 (Avg Bid)
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    8 bud

    We are looking for an expert who can define an openAPI definition for the openSource variant of vtiger 7.4.0/7.5.0 The openAPI definition shll be used for generating API clients from the definition. E.g. we will use maven openapi-generator-maven-plugin 7.0.0 We require an expert on vtiger API along an even better expert on openAPI definition creation. Postman collection is available:

    €61 (Avg Bid)
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    6 bud

    We look for Java Spring-Boog and Core-Java senior expert developer Your job will be to re-implement this api in java / spring-boot Mandatory!!!! You have to have a installed the docker environment on you PC/Laptop and You document EACH step step to make the up and running along with a docker compose environment to make the new spring-boot api running with it. Milestones MS1: suggest if an openAPI definition would reduce your workload, since REST server and client can be generated MS2: reImplement as spring boot service the endpoints documented here: and: MS3: provide a docker compose incl. all steps to make your code available in a container Implementations: - best practices with openAPI - best practices with spring boot NO UI for now required! NO database required! No REST en...

    €123 (Avg Bid)
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    17 bud

    We look for Java Spring-Boog and Core-Java senior expert developer for vtiger integration Your job will be to implement requirements which are mutually agreed on this API Mandatory!!!! You have to have a installed vtiger on your local environment to be able to use it properly and to test it properly! you can run locally via: Milestones MS1: provide existing openapi yml or json file (preferably ver3.x) Implement a REST api call to - find all users and return the users as full DTO (use jsonschema2pojo to get all fields generated) List<UserDTO> findAllUsers() List<UserDTO> findUsers(List<UserDTO> pUsersByExampleToFind) - add users List<UserDTO> addUsers(List<UserDTO> pUsersToAdd) - update update users List<UserDTO> updateUsers(List<User...

    €72 (Avg Bid)
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    18 bud

    We look for Java Spring-Boog and Core-Java senior expert developer Your job will be to implement requirements which are mutually agreed on this API maybe helpful: Mandatory!!!! You have to have a installed matrix synapse on PC/Laptop and on your smartphone to run on your local environment. You document EACH step you can run locally via: Milestones MS1: provide existing openapi yml or json file (preferably ver3.x) Implement a spring boot service to invite users to the matrix. - sendNewUserRegistrations(List<UserDTO>) send a template e-mail to users to invite them to register an account - createNewPrivateGroupChats(List<GroupChatDto>, SpaceDto) create the list of (private) group chats into the given Space - inviteNewUsers(List<UserDTO>, List<GroupChatDto...

    €50 (Avg Bid)
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    14 bud

    We look for Java Spring-Boog and Core-Java senior expert developer Your job will be to implement requirements which are mutually agreed on this API (cora-api) and Mandatory!!!! You have to have a installed opnSense on your local environment to be able to use it properly and to test it properly! you can run locally via: Milestones MS1: provide existing openapi yml or json file (preferably ver3.x) Delivery of to reproduce your steps of the proxmox installation on virtualBox Implement a REST api call to CRUD users and groups - find all users and return the users as full DTO (use jsonschema2pojo to get all fields generated) List<UserDTO> findAllUsers() List<UserDTO> findUsers(List<UserDTO> pUsersByExampleToFind) - add users List<UserDTO> addUsers(List<UserD...

    €149 (Avg Bid)
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    23 bud

    We look for Java Spring-Boog and Core-Java senior expert developer Your job will be to implement requirements which are mutually agreed on this API (cora-api) Mandatory!!!! You have to have a installed opnSense on your local environment to be able to use it properly and to test it properly! you can run locally via: Milestones MS1: provide existing openapi yml or json file (preferably ver3.x) Delivery of to reproduce your steps of the opnSense installation on virtualBox Implement a REST api call to List<VoucherDTO> listAllVouchers() List<VoucherGroupDTO> listAllVoucherGroups() List<VoucherProviderDTO> listAllVoucherProviders() List<VoucherDTO> expireVouchers(List<VoucherDTO>) List<VoucherDTO> createVouchers(List<VoucherDTO>) same for temp...

    €73 (Avg Bid)
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    14 bud

    We look for Java Spring-Boog and Core-Java senior expert developer Your job will be to implement requirements which are mutually agreed on this API Mandatory!!!! You have to have a playground of mailcontrol / forcepoint cloud security gateway in access. Preferably as playground on a docker environment. (plz check this as part of your bid!) You document EACH step to reproduce a test/integration environment Milestones MS1: Implement a spring boot service to add new users to the e-mail subscription. - fetchEmailSubscriptionsAll() - fetchEmailSubscriptions(List<UserDto> pByExample) - addNewEmailSubscriptions(List<UserDto>) // UserDto contains a main e-mail => subscription e-mail and alias e-mail addresses, along with a details of add subscription screenshot - deleteEmailS...

    €103 (Avg Bid)
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    29 bud

    you are a fresher here? Require a quick win for gaining reputation here? this is a easy task, IF you are docker and java/springboot developer We look for Java Spring-Boog and Core-Java senior expert developer Your job will be to implement requirements which are mutually agreed on this API maybe helpful: Mandatory!!!! You have to have a installed matrix synapse on PC/Laptop and on your smartphone to run on your local environment. You document EACH step you can run locally via: Milestones MS1: Implement a spring boot service to invite users to the matrix. - sendNewUserRegistrations(List<UserDTO>) send a template e-mail to users to invite them to register an account - createNewPrivateGroupChats(List<GroupChatDto>, SpaceDto) create the list of (private) group chat...

    €181 (Avg Bid)
    €181 Gns Bud
    26 bud

    We look for Java Spring-Boog and Core-Java senior expert developer Your job will be to implement requirements which are mutually agreed on this API Mandatory!!!! You have to have a installed gitlab CE on your local environment to be able to use it properly and to test it properly! you can run locally via: Milestones MS1: Implement a rest api call to - find all users and return the users as full DTO (use jsonschema2pojo to get all fields generated) List<UserDTO> findAllUsers() List<UserDTO> findUsers(List<UserDTO> pUsersByExampleToFind) - add users List<UserDTO> addUsers(List<UserDTO> pUsersToAdd) - update update users List<UserDTO> updateUsers(List<UserDTO> pUsersToUpdate) - block/ban users List<UserDTO> blockUsers(List&l...

    €74 (Avg Bid)
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    33 bud

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