Hire the best Backend Rest API professionals

Check out Backend Rest API professionals with the skills you need for your next job.

Clients rate Backend Rest API professionals
Rating is 4.7 out of 5.
4.7/5
based on 7,709 client reviews
Martin E.
$105/hr
  • Trophy Icon Backend Rest API
  • JavaScript
  • PHP
  • Node.js
  • Laravel
  • React
  • Angular
  • WordPress
  • Telecommunications Engineering
  • Integromat
  • Heroku
  • Git
  • RESTful API
  • Airtable
  • Zapier
  • Automation

"Martin is a super responsive, thorough, and versatile developer with a lot of experience taking projects from ideation to market. He brings great perspective and energy to all projects he has contributed to and is a prodigious worker. I would highly recommend him to any individual or company looking to bring aboard a rockstar developer in the short or long-term." - Trevor Mengel of Cloutdesk. Hi, I have 9+ years of programming experience of varying degrees. My experience includes web applications for small-to-middle business automation, corporate websites based on CMS/CMF, online shops, Social networks, Search Engines, etc. I have also...

Aleksandr L.
$85/hr
  • Trophy Icon Backend Rest API
  • C++
  • C
  • Rust
  • Python
  • Qt
  • OpenGL
  • Django
  • Front-End Development
  • Electron
  • JavaScript
  • Microsoft Windows
  • API
  • RESTful API

** Under Construction ** Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.

Eric P.
$50/hr
  • Trophy Icon Backend Rest API
  • API Documentation
  • Technical Writing
  • Technical Editing
  • SEO Writing
  • Requirements Specification
  • REST
  • Swagger
  • HTML
  • CSS
  • JavaScript
  • Java
  • SQL
  • XML
  • Unified Modeling Language
  • Sequence Diagram

I have worked in software development for 15 years both as coder implementing backend (Java) and front technologies (HTML, CSS) as well as a software architect. I have been responsible for end user documentation for APIs as well requirements and design specifications. I've worked with various project stakeholders and clients to develop requirements and projects plans. I have worked with UX engineers to help refine designs and created mocks ups of wireframes, UML diagrams and other visual assets. When not working, I am a singer/songwriter. I have released an album and perform regularly in the Bay Area. I maintain my own music publishing...

Colin M.
$75/hr
  • Trophy Icon Backend Rest API
  • Minimum Viable Product
  • Django
  • Python
  • JavaScript
  • jQuery
  • HTML5
  • CSS 3
  • Docker
  • Bootstrap
  • PostgreSQL
  • RESTful API
  • Heroku
  • Stripe

I am an experienced professional with 5+ years of team management, operations management, and process development experience. Recognized for demonstrating a natural aptitude for administering all day-to-day operations to allow for maximum company success, as well as for evaluating and enhancing company processes and effectively operating across a wide variety of other areas such as sales, programming, and accounting, I have a history of contributing to company growth throughout my career. Professional focal points include operations strategic planning, P&L ownership, document management, programming, sales development, accounting management,...

Nathan D.
$75/hr
  • Trophy Icon Backend Rest API
  • Python
  • Clojure
  • .NET Framework
  • Java
  • JavaScript
  • HTML
  • CSS
  • SQL
  • ClojureScript
  • RESTful API

I am a multi-disciplined programmer with over 10 years industry experience. I am an expert at multi-paradigm programming (functional, object-oriented, and logic paradigms), and use the paradigm that is most appropriate for the problem. I study programming languages as a hobby. I am pretty much language agnostic — I don't care too much what language I use, or even if I know it prior to the project — but I do prefer languages that are conducive to a multi-paradigm approach, such as Clojure, Scala, Python, etc. I enjoy learning new things, and am constantly honing my skills. I seek software development jobs that will both exercise the...

Edwin T.
$90/hr
  • Trophy Icon Backend Rest API
  • Google Cloud Platform
  • RESTful API
  • Machine Learning
  • Xero
  • Google Data Studio
  • BigQuery
  • Cloud Architecture
  • Python
  • SQL
  • Google APIs
  • Oracle APEX
  • API Integration
  • TensorFlow
  • Google Sheets
  • Database Design

My objective is to find exciting projects where I can utilize my knowledge and result in a win-win situation for myself and the employer. - Apache Airflow and Apache Spark - Scala programming with Apache Spark SQL and ML Google Cloud Platform Architecture - Security using IAM, service accounts, roles, and permissions - Data Prep for data pipeline - Big Query and BigQuery ML - DataStudio - Pub/Sub - Cloud IoT - Google Cloud DataProc - Google Cloud SDK - SQL & PL/SQL Programming - ORACLE ENTERPRISE MANAGER 11g (GUI Database Admin Console) - RMAN COMMAND LINE (backup and recovery) - DATAPUMP IMPORTS/EXPORTS (Command line and...

Nikita I.
$50/hr
  • Trophy Icon Backend Rest API
  • C#
  • .NET Framework
  • TypeScript
  • React
  • ASP.NET
  • SQL Programming
  • PHP
  • MongoDB
  • Sass
  • RESTful API
  • Microsoft SQL Server
  • Azure
  • GraphQL
  • Azure DevOps
  • API Integration

I'm experienced .NET developer with additional love to frontend development using React and Typescript. Through my career I had experience with both developing full packaged products — desktop applications and server solutions — and with enterprise systems development as well. The latter is my primary interests domain. I'm always focused on reaching the goals set for the product, and I have vast experience with many technologies such as ASP.NET MVC/WebAPI, .NET/ASP.NET Core, JS, TS, React, Angular and many other. This experience helps me solve your problem quickly with known and proven approaches. Contact me any time, I'm always glad to...

Dave M.
$50/hr
  • Trophy Icon Backend Rest API
  • Encompass
  • Alexa Skill Kit
  • Automatic Speech Recognition
  • Kronos Workforce Management
  • PCI
  • Avaya
  • MVC Framework
  • Web Service
  • Reports
  • Perl
  • Pipedrive
  • Session Initiation Protocol
  • .NET Framework
  • .NET Core
  • RESTful API

Expert Software Developer with 30 years of proven experience. Expert on Telephony, Streaming, MVC and Web Services and Alexa Skills. Expert Loan Origination Expert - Encompass, Calyx Point, Avista. Integration of these with other applications. Also team of expert loan processors available. Expert Kronos Consultant on WorkForce Dimensions, WorkForce Ready and WorkForce Central. Deep knowledge of Kronos API and Setup and Configuration.

Martin C.
$25/hr
  • Trophy Icon Backend Rest API
  • .NET Framework
  • C#
  • Xamarin
  • Flutter
  • Desktop Application
  • Mobile App Development
  • Web Apps
  • ASP.NET Core
  • Entity Framework
  • LINQ
  • SQL
  • Microsoft SQL Server
  • MySQL
  • RESTful API
  • Automatic Test

During my work, you can expect great attention to detail and quality of code for your projects. I am passionate about clean code and problem-solving with the most efficient algorithms possible. My main strengths are .NET and Flutter. I have worked on very ambitious projects involving back-end and front-end development. My experience in software development has been focused in business applications. I have developed modules for an ERP (Enterprise Resource Planning System), WMS (Warehouse Management System) E-commerce and Mobile Apps. In order to be successful, and provide a great customer experience, my attitude towards every client is...

Pavan K.
$125/hr
  • Trophy Icon Backend Rest API
  • Meteor
  • Node.js
  • Elasticsearch
  • Ionic Framework
  • React Native
  • React
  • GraphQL
  • MongoDB
  • RESTful API
  • Serverless Computing
  • JavaScript

Hey there! I am Pavan Kumar, a developer with experience in Node.js, IoT, Firebase, Mobile app development. For the past six years, I have been working as a Full-time Freelancer. I have a Master's degree in "Information Security" and am familiar with crypto algorithms and a secure first programmer. With a vast knowledge of design patterns, I write readable, testable and scalable code. Here are my skill sets: Web Frontend Angular. React. Blaze. Vue Backend Framework Node. Meteor. Serverless (AWS/GCP) Datastore Mongo. Elasticsearch. Amazon Redshift. Firestore Mobile SwiftUI. Flutter...

SOURAV S.
$70/hr
  • Trophy Icon Backend Rest API
  • Python
  • Django
  • Algorithms
  • Docker
  • JavaScript
  • Node.js
  • Security Operation Center
  • API
  • Information Security
  • RESTful API

Hi! I am Sourav - A seasoned backend software engineer with demonstrated experience in building cybersecurity SaaS products; having a post-graduate degree in Mathematics and Computing from a Tier-1 institution - Indian Institute of Technology, Banaras Hindu University(IIT-BHU), Varanasi. Currently, I work with QueryAI, where I own the product side of developing new integrations of third party vendors with Query.AI and simultaneously building the backend infrastructure to support newer integrations everyday. Previously, I have worked for FireEye (NASDAQ: FEYE) and Siemplify(Now part of Google Cloud) as a software developer and python...

Denis A.
$45/hr
  • Trophy Icon Backend Rest API
  • PHP
  • Symfony
  • SQL
  • Amazon Web Services
  • SOAP
  • API Integration
  • API Development
  • OAuth
  • API
  • MySQL
  • Unit Testing
  • Doctrine ORM
  • Docker
  • RESTful API
  • Automatic Test

TESTIMONIALS FROM MY PREVIOUS UPWORK CLIENTS: "Denis is a great developer with a sense of caring about the end result..." "Denis is one of the best freelancers I've worked with. If he's got experience with the coding you need done, hire him without a second thought..." "Denis did an amazing job on this project and showed great initiative... The quality is outstanding, and the code follows all coding conventions. Denis is a great guy to work with, and projects are delivered quickly and better than requested...." "Denis definitely knows his stuff and was very responsive. Great knowledge of PHP and SOAP services, would definitely hire...

Juris K.
$45/hr
  • Trophy Icon Backend Rest API
  • Python
  • Data Mining
  • Django
  • Asynchronous I/O
  • API
  • RESTful API
  • C++

Backend developer with hands-on Python experience of more than 5 years. More than 10 years with different software development projects. Projects with background on payment systems, Enterprise Resource Planning (ERP), back-ends for automation and web. Experience with waterfall and agile methods. Practitioner of Test Driven Development (TDD) method. Interested in API development.

Fikret Burak G.
$75/hr
  • Trophy Icon Backend Rest API
  • Node.js
  • RESTful API
  • MongoDB
  • React
  • HTML
  • Redis
  • CSS
  • JavaScript
  • SQL
  • ExpressJS
  • API Integration
  • Software Architecture & Design
  • AWS Systems Manager

Full stack developer/ architect with over 12 years of experience in planning, developing and maintaining high scalable, cloud hosted applications and leading teams. Co-founded an online travel agency. Was in charge of the technical side as well as daily operations. The project served 100 Million+ air fare and availability requests in 2019 where the system connected to 15 different airline/provider API’s to make the search and tailor the results to the consumers needs. The system was first written in .NET C# with Ms SQL database in MVC pattern in 2010. The system evolved into 15 microservices where most micro services used Node.js with...

Adeel A.
$40/hr
  • Trophy Icon Backend Rest API
  • C#
  • API
  • Sage
  • Software Developer
  • SAP Crystal Reports
  • Software Integration
  • RESTful API
  • .NET Framework
  • ERP Software
  • Automation
  • Web Development
  • Ecommerce Platform Development
  • Sage Intacct
  • Data Extraction
  • Data Migration

Experienced Information Technology professional with 10 years demonstrated history of working in the apparel and fashion industry as well as public sector in different capacities. Skilled in Project Planning & implementation, Team Management, Retail Pro, Sage 300 EPR, Sage 50, SQL Databases and .Net programming. Experienced in : SAGE 300 ERP, Sage 50, Sage 100, Retail Pro (Prism & v9), SAP (FI, HCM, MM, SD), Visual Studio (.net & vb6), Microsoft SQL Server with Reporting Services – SSRS Reports & Dashboards, Crystal Reports

Mikhail D.
$80/hr
  • Trophy Icon Backend Rest API
  • Python
  • Django
  • React
  • Bootstrap
  • pandas
  • Docker
  • Website Development
  • Data Analysis
  • Git
  • RESTful API
  • SaaS
  • Twitter Bootstrap
  • CSS
  • HTML5
  • API

Hello, More than 9K hours and 6 years of full-time Python development on Upwork. I'm developer, with most skills in python and django. I believe my strengths include self-organization and punctuality. My primary goal is to always meet your needs and deadlines. When working on a new project, I like to chat with the client to have a clear understanding of his or her needs and vision of the project. I am honest and fair. Mostly I'm working alone, but also I like to work in a team and has experience of working as Team Lead. My usual workflow with clients: - at first, I carefully listening, what client need. - then asking questions, to...

Dmytro K.
$50/hr
  • Trophy Icon Backend Rest API
  • Laravel
  • PHP
  • JavaScript
  • CSS
  • MySQL
  • HTML5
  • Cryptocurrency
  • API Development
  • Vue.js
  • SaaS
  • HTML
  • Database Design
  • RESTful API
  • Database Architecture
  • Web Development

I develop web apps and sites using Laravel, Vue, Tailwind. My forte is to take over existing PHP project with legacy, performance issues and chaotic development cycles and put it all in order: resolve issues, implement new features, introduce proper code practices. If you have just an idea, I will help create a project roadmap with clear timeline. I like working closely with product owner, only this way I can deliver what you really need, not in the end of project but starting from day 1. I believe good code is one that is easy to change and maintain. If you want to build: - a Marketplace; - a SaaS; - a membership restricted website...

Muhammad Z.
$65/hr
  • Trophy Icon Backend Rest API
  • React Native
  • React
  • AngularJS
  • Vue.js
  • GraphQL
  • ExpressJS
  • Node.js
  • RESTful API
  • Amazon ECS
  • API Development
  • NoSQL Database
  • TypeScript

Hi, I'm a Full Stack Developer. I have experience in React, ReactNative, Angular, Vue, Node and Graphql. I can manage multi-disciplinary projects and solve complex problems. My aim is to develop projects that look beautiful and professional, are highly functional, load quickly and are user-friendly. I have experience working on both small and large codebases and I am able to take over and integrate myself into established projects easily. In addition to being a developer, I am also experienced in project management tools such as Asana, Jira and Trello. WHY CHOOSE ME When choosing me for your next project, you will have the following: ★ A...

Rohail N.
$40/hr
  • Trophy Icon Backend Rest API
  • JavaScript
  • Node.js
  • ExpressJS
  • MongoDB
  • Python
  • Django
  • Flask
  • AWS Lambda
  • Amazon ECS
  • RESTful API
  • RESTful Architecture
  • PostgreSQL
  • API
  • Amazon Web Services

I would summarize myself as a hardworking ambitious enthusiast for learning and enhancing my skill, prioritizes client support, critical thinking, and communication to achieve technology and computer science goals. Accomplished Software Engineer with years of successfully developing software and systems for high-traffic social networking services. Excellent verbal and written communication skills and ability to interact effectively. My skills include but not limited to: Python Django Node Express AWS Heruko

Val S.
$120/hr
  • Trophy Icon Backend Rest API
  • HubSpot
  • Front-End Development
  • CSS
  • JavaScript
  • Node.js
  • WordPress
  • Shopify
  • API Integration
  • Web Design
  • Blog Development
  • CMS Development
  • RESTful API
  • Custom App
  • Business with 1000+ Employees

UpWork Expert-Vetted (Top 1% Freelancer) | HubSpot Certified Partner Trusted by 100s of companies from startups to the Fortune 500 ------------------------------------- HubSpot Website Redesign Build virtually anything in HubSpot CMS from a mockup, using your brand guidelines—or let us handle the design with the latest design trends and best practices. ------------------------------------- Support for Existing HubSpot Websites Evaluate your website for best practices, upgrade an outdated theme or template, add a new section, build reusable drag-and-drop modules. Use HubSpot features to the fullest....

Thai N.
$50/hr
  • Trophy Icon Backend Rest API
  • Java
  • Spring Framework
  • Spring Boot
  • Java EE
  • Amazon Web Services
  • API
  • Web Service
  • Docker
  • MySQL
  • RESTful API
  • Hibernate

Thanks for viewing my profile. Feel free to contact me to see if I can help out with your project. I'm an Oracle-certified Java expert with much experience in backend technologies. In particular, I can handle both Java EE and Spring ecosystems in the Java space. I'm also an AWS-certified DevOps professional engineer; hence, I can help if you need a hand on the infrastructure. With 10k+ hours of work on Upwork alone, I believe I'm experienced enough to participate in your project. As a side note, if you do a Google search with the keywords "spring bean", "spring boot interview questions", or "maven integration testing", you'll find my writing...

Shahzad F.
$50/hr
  • Trophy Icon Backend Rest API
  • RESTful API
  • React
  • Node.js
  • Django
  • Front-End Development
  • DevOps
  • BigQuery
  • Vue.js
  • Git
  • Linux System Administration
  • JavaScript
  • Python
  • AngularJS
  • Flask
  • Software Architecture & Design

Online business presence is essential in this digital age, potential customers are expecting to see you online, it is one of the most important investments that a business can make. The benefits are endless! If you are looking to establish an online business presence, a start-up building out a digital product, a software development shop looking to hire an experienced developer, or an established company scouting for a qualified developer. Your goal is to find a professional developer who can study your business requirement or designs and translate them to a quality software solution that delivers value to the business. I am an...

Dibyaranjan S.
$15/hr
  • Trophy Icon Backend Rest API
  • Python
  • Selenium
  • Django
  • NumPy
  • Python-Requests
  • RESTful API
  • Beautiful Soup
  • Scrapy
  • PostgreSQL
  • Automation
  • MongoDB
  • MySQL

I am a professional Python Developer with 7 years of experience. I excel at developing codes for scraping website. Along with this, I develop REST API with django as backend and deploy on cloud using Docker. I also have experience in developing real time dashboard using Python dash framework. With a rich coding experience along with great problem solving ability, I can help clients bring their ideas to product. I am a dedicated programmer and always deliver my projects on time and with all the quality requirements. I build maintainable, scalable, reusable code and most importantly user friendly code with proper documentation. I always...

Prabin U.
$30/hr
  • Trophy Icon Backend Rest API
  • Java
  • React
  • Grails
  • AngularJS
  • JavaScript
  • HTML5
  • AJAX
  • Agile Software Development
  • Spring Framework
  • Elasticsearch
  • MongoDB
  • Software Architecture & Design
  • RESTful API
  • Web Development

Passionate programmer, ever hungry to learn and earn. I have a CAN DO attitude and i am a dedicated learner. EXPERIENCE : 7 Years Backend Skills : * Java * Grails * Node * Groovy * Spring * Hibernate * AWS Frontend Skills : * Javascript * React * Redux * AngularJs * HighCharts * Html * Sass, Less Databases : * Mysql * Mongo * Elastic Search * Snowflake

Ivaylo G.
$42/hr
  • Trophy Icon Backend Rest API
  • Vue.js
  • Vuex
  • Vuetify
  • Quasar Framework
  • Database Design
  • PostgreSQL
  • RESTful API
  • HTML
  • Tailwind CSS
  • Business Analysis
  • ERP Software
  • Software Debugging
  • Code Refactoring
  • JavaScript
  • SQL

I can't say for sure but I have the impression that very few people (if any) in the IT field have read the "Message to Garcia" by Elbert Hubbard. I have read it and I dare to consider myself one of the people, who are able to "bring the message". There always will be someone who is more creative, knows more or works faster than me. I am aware of that and I accept it. Still, I am quite confident of being a better prepared professional than the average IT guy. I have 20 years of experience in programming, database modelling, system design and architecture, business processes analyses and automation, basic managerial accounting, Linux and...

Mary M.
$60/hr
  • Trophy Icon Backend Rest API
  • PHP
  • MySQL
  • Amazon EC2
  • RESTful API
  • CodeIgniter
  • API Development
  • Git
  • Laravel
  • Golang
  • Web Development
  • Amazon S3
  • Amazon EC2

Over the past 7+ years, I have developed web applications using advanced backend with core PHP,MySQL,AWS Aurora,AWS RDS,PostgreSQL,MsSQL,JSON in MAMP, WAMP,XAMPP,LAMP, Laravel, CodeIgniter frameworks,rich frontend HTML,CSS,AJAX,JavaScript,jQuery, data visualization using AmCharts & Highcharts libraries. My developer expertise includes web application development,data visualization,apache,Stripe payment gateway integration,REST & SOAP API creation and use for small,middle,large business and personal level. I am also a DevOps Engineer with experience in Terraform, Ansible, AWS(EC2,ALB/ELB, Elastic Beanstalk, Route53, ACM, VPC, Auto-Scaling,...

Sandip P.
$50/hr
  • Trophy Icon Backend Rest API
  • Android App Development
  • AWS Lambda
  • Google Cloud Platform
  • Amazon Web Services
  • MQTT
  • Python
  • Alexa Skill Kit
  • AWS IoT Core
  • RESTful API
  • Deployment Automation
  • Amazon EC2
  • Amazon DynamoDB
  • Serverless Computing
  • Terraform
  • AWS CloudFormation

I'm an AWS Certified Solutions Architect having more than 7+ years of working experience with the AWS platform. I have extensive knowledge and experience in Cloud migration. Helped many customers to succeed on their cloud migration journey. In addition to this, I can design a serverless stack. - Experience in Cloud Platform • AWS (EC2, RDS, S3, Lambda, IAM, SES, SNS, ELB, ElastiCache, CloudWatch, APIGateway, Route53, Connect, Rekognition, WorkMail, Kinesis, Connect, DynamoDB, DynamoDB Stream, Cognito, IoT, CloudFront, etc.) • Google Cloud Platform (AppEngine, CloudSQL, VisionAPI, CloudDataStore, etc.) • Cloud telephony contact center...

$NaN/hr

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How to Hire Top Back-End REST API Developers

How to hire top back-end REST API developers

Whether your goal is to set up the basic back-end APIs needed for any app to function or to build the public APIs that will let you plug into the lucrative API economy, back-end REST API developers are here to help. 

So how do you hire back-end REST API developers? What follows are some tips for finding top back-end REST API developers on Upwork.

How to shortlist back-end REST API professionals

As you’re browsing available back-end REST API consultants, it can be helpful to develop a shortlist of the professionals you may want to interview. You can screen profiles on criteria such as:

  • Technology fit. You want a back-end REST API developer who understands the back-end technologies behind your API project. 
  • Project experience. Screen candidate profiles for specific skills and experience (e.g., writing APIs for an ASP.NET back end).
  • Feedback. Check reviews from past clients for glowing testimonials or red flags that can tell you what it’s like to work with a particular back-end REST API developer.

How to write an effective back-end REST API job post

With a clear picture of your ideal back-end REST API developer in mind, it’s time to write that job post. Although you don’t need a full job description as you would when hiring an employee, aim to provide enough detail for a contractor to know if they’re the right fit for the project.

Job post title

Create a simple title that describes exactly what you’re looking for. The idea is to target the keywords that your ideal candidate is likely to type into a job search bar to find your project. Here are some sample back-end REST API job post titles:

  • Back-end REST API developer needed with Node.js expertise
  • API integration for an ecommerce website
  • Back-end REST API development help with a fintech app

Back-end REST API project description

An effective back-end REST API job post should include: 

  • Scope of work: From third-party integrations to public APIs, list all the deliverables you’ll need. 
  • Project length: Your job post should indicate whether this is a smaller or larger project. 
  • Background: If you prefer experience with certain technologies or developer tools, mention this here. 
  • Budget: Set a budget and note your preference for hourly rates vs. fixed-price contracts.

Back-end REST API developer job responsibilities

Here are some examples of back-end REST API developer job responsibilities:

  • Write APIs that integrate front-end features with back-end resources and business logic
  • Implement integrations with third-party APIs
  • Design, implement, and maintain data storage solutions
  • Test and validate API implementations

Back-end REST API developer requirements and qualifications

Be sure to include any requirements and qualifications you’re looking for in back-end REST API developers, such as:

  • Back-end REST API
  • Web development
  • Back-end development
  • Desired technology stack

Back-End REST API Developers FAQ

What is back-end REST API development?

Every app has a front end and a back end. In order for these two halves to communicate with one another, there needs to be a standardized API (application programming interface) for sending and receiving data. REST (Representational State Transfer) is an architectural style for creating these standardized APIs. APIs can be used to link a client to its back end or the server side of a third-party app. 

How much does it cost to hire a back-end REST API developer?

The first step to determining the cost to hire a back-end REST API developer will be to define your needs. Rates can vary due to many factors, including expertise and experience, location, and market conditions.

Cost factor #1: project scope

The first variable to consider when determining scope is the nature of the work that needs to be completed. Not all back-end REST API projects are created equally. Pulling data from your social media accounts through a publicly available API will take less time than building your own custom analytics API. 

Tip: The more accurately your job description describes the scope of your project, the easier it will be for talent to give you accurate cost estimates and proposals.

Cost factor #2: back-end REST API developer experience

Choosing the right level of expertise for the job is closely tied to how well you determined the scope of your project. You wouldn’t need an advanced developer to write basic APIs to link your single-page app (SPA) with its back end. On the other hand, creating a public API for your SaaS (software as a service) app from which your customers will be able to programmatically extract data for their own services will require a seasoned developer who can ensure the security of your application.

Beyond experience level, you need to consider the type of experience the talent possesses. The following table breaks down the rates of the typical types of back-end API developers you can find on Upwork.

Rates charged by back-end REST API developers on Upwork

Level of Experience Description Hourly Rate
Beginner Entry-level expertise in back-end fundamentals: database solutions (e.g., MySQL, PostgreSQL, MongoDB), web servers (e.g., nginx, J2EE, Node.js), cloud solutions (e.g., AWS, Azure, Google Cloud), server-side languages (e.g., Java, Python, PHP), and RESTful API development.  $30-50+
Intermediate Beyond fundamentals, specialization in industry-specific API use cases (e.g., Shopify API for ecommerce).  $60-90+
Expert Full-stack development expertise (front end and back end). Experience leading teams of developers to carry a product through the SDLC (software development lifecycle). Capable of writing secure, enterprise-level public APIs for commercial products.  $100-120+

Cost factor #3: location

Location is another variable that can impact a back-end REST API developer’s cost. It’s no secret that you can leverage differences in purchasing power between countries to gain savings on talent. But it’s also important to factor in hidden costs such as language barriers, time zones, and the logistics of managing a remote team. The real advantage to sourcing talent remotely on Upwork is the ability to scan a global talent pool for the best possible person for the job. Location is no longer an obstacle. 

Cost factor #4: independent contractor vs. agency

The final variable regarding talent cost is hiring an independent contractor vs. an agency. An agency is often a “one size fits all” model, so you’ll often have access to a designer, a project manager, an engineer, and more. When hiring individuals you have total autonomy regarding who is responsible for which part of the project, but you’ll need to source each of those skills separately.

The trade-off between hiring individuals vs. hiring an agency is the level of administrative overhead you incur personally in coordinating tasks among all members of the team. Project scope and personal preference will determine which style is a better fit for your needs.

Common back-end REST API developer mistakes

Unencrypted APIs: You should always use some form of encryption for your APIs. At a minimum, SSL or TLS should be used to encrypt any data flowing through your APIs. Insecure APIs are a common access point for data breaches. People often liken APIs to gateways, but they are more like tunnels that ensure information can travel only between two points. Failing to use encryption would be like leaving the maintenance access door to your tunnel unlocked, allowing a malicious third party access to your traffic or to go somewhere the public is not supposed to be able to reach. 

Nondescript error codes: It can be tempting when writing lots of APIs to return the generic 400 Bad Request error code. But as is often the case in life, taking shortcuts and cutting corners can lead to headaches further down the line. Poorly scripted API error messages are a recipe for increased support tickets and rising blood pressure for the poor developer who has to address them. And for customer-facing APIs, it can lead to bad press and poor user reviews. 

Oftentimes, simply taking the extra step to use the appropriate standard HTTP status code is enough to direct most developers to the source of the issue. 401 means the failure was caused by an authentication error, while 403 means the request was understood but the user didn’t have the right permissions. For cases where the standard error codes aren’t enough, however, it can be helpful to include a simple message or a link to a help page for more information on your site.

Not versioning REST APIs: The digital world is constantly changing. You need to make sure that your APIs remain up to date with the latest security and performance best practices, and sometimes that means making app-breaking changes on the back end. That’s why it’s important to practice versioning early on, especially if this is for a customer-facing API. This will allow you to take advantage of new data technologies and improving services while still providing service to slow adopters within your customer base. You can implement versioning in the request header or the endpoint URI. 

Tips and best practices

Use nouns instead of verbs when naming API endpoints

REST takes a resource-based approach to API development. The actions you can perform are strictly defined by HTTP methods such as GET, PUT, POST, and DELETE. Since actions on resources in HTTP are verbs, it makes more semantic sense to name your endpoints as nouns. So instead of calling GET /addUser123, calling GET /users/123 is preferred. The latter naming is better because anyone looking at your code can immediately tell that 123 is likely an ID for a single user from a collection of users. 

Save resources by filtering your queries

Speaking of resource collections, they can get pretty huge. Sites can have thousands of users, so how can we make our API calls more efficient? The answer is to make more-specific queries. You don’t need to pull the entire list every time the front end of your app needs a certain resource. You can use filtering, sorting, and paging to narrow down the number of results being pulled in an API request. 

  • Filtering lets you narrow query results by named parameters such as price or country. 
  • Sorting lets you pull results in ascending or descending order by a selected parameter such as date. 
  • Paging lets you place a limit on the number of results being pulled per view. 

Document your APIs

At the end of the day, whether your API is for internal use or in a customer-facing product, it’s important for others to be able to read and understand how to use it. API documentation is a skill in and of itself. Documentation should be well written and easy to navigate. It should clearly tell developers what they can and cannot do with your API, what specific commands they are able to make, and the preferred data format they should use. 

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