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Check out a sample of the 655 Backend Rest API jobs posted on Upwork

Sendgrid integration Fixed-price ‐ Posted 3 days ago

$100
Fixed-price

Expert
Experience level

Hey! I'm searching for someone that can give me a Nestjs server with minimal GUI in react, to connect a user domain account, in order…

Backend Rest API SendGrid JavaScript API Development API Integration RESTful API API NestJS Node.js React
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Senior C++ Developer Hourly ‐ Posted 3 days ago

30+ hrs/week
Hours needed

More than 6 months
Duration

Expert
Experience level

Job Title: Senior Back End C++ Developer Job Type: Full-time, permanent Location: ON SITE IN ABUJA, NIGERIA ONLY (Hybrid) - not negot…

Backend Rest API Distributed Computing RESTful API API C++
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Headless Wordpress and React (REST API) consulting Fixed-price ‐ Posted 3 days ago

$40
Fixed-price

Intermediate
Experience level

I am looking for an experienced Wordpress + React developer for quick consulting on a headless CMS project. I want to use Wordpress (fo…

Backend Rest API PHP API Integration API JavaScript React RESTful API
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30+ hrs/week
Hours needed

More than 6 months
Duration

Expert
Experience level

I am a senior Azure cloud developer looking to enhance my backend development skills and am seeking a knowledgeable mentor to guide me…

Backend Rest API Software Architecture & Design CI/CD RESTful API Database API Python
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Python Developer with Langchain experience Fixed-price ‐ Posted 3 days ago

$150
Fixed-price

Intermediate
Experience level

Looking for backend developer who can build APIs for my project. This would require integration with few SAAS services like Gdrive, Con…

Backend Rest API Prompt Engineering PostgreSQL RESTful API Python
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Zalo API Integration Hourly ‐ Posted 3 days ago

Less than 30 hrs/week
Hours needed

Less than 1 month
Duration

Intermediate
Experience level

We are looking for an experienced PHP developer to integrate the Zalo messaging system into our platform. The role involves developing…

Backend Rest API PHP RESTful API
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Golang Developer needed for adding Backend APIs Fixed-price ‐ Posted 3 days ago

$200
Fixed-price

Intermediate
Experience level

We have a project that need few new API endpoints. Your job is to create these API endpoints in existing golang project We're using D…

Backend Rest API Database RESTful API Git API Golang
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Integration engineer required Fixed-price ‐ Posted 3 days ago

$118
Fixed-price

Expert
Experience level

I'm looking for an integration expert to work with my existing team. Some of those tasks are; 1. Payment integration 2. Create a custom…

Backend Rest API Python RESTful API Web Development API Jenkins AWS Lambda
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Java PHP cURL Oracle Identity Cloud Service Hourly ‐ Posted 3 days ago

Less than 30 hrs/week
Hours needed

1 to 3 months
Duration

Intermediate
Experience level

Seek to fix getMOSPatch.java (V2) code. It is broken possibly due to switching from OAM to IDCS. See latest issue #34 at GitHub. Conseq…

Backend Rest API HTTP RESTful API cURL Java PHP
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Less than 30 hrs/week
Hours needed

1 to 3 months
Duration

Intermediate
Experience level

We are a leading algorithmic trading community leveraging TradingView webhooks for automated trading. We're in search of an experienced…

Backend Rest API Automation Python API Integration RESTful API PHP API
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