Backend Development Jobs

Backend code is the part of a website or application that isn’t visible to the user. The code is a behind-the-scenes part of development, requiring a high level of competency regarding coding and the server that is being used. A backend developer works on the implementation and configuration of systems, and thus provides the building blogs for a website or program.

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    40 Gefundene Jobs, Preise in EUR

    My company has an online electronics business where we buy and sell. We need someone who has experience with a shipping API service called [Zur Anzeige der URL Anmelden] We need you to help us fix the code in the API where we charge shipping rates based off the size of the device and save money as well. We can not get easy post to calculate the correct shipping costs on our web site for custom...

    €40 (Avg Bid)
    €40 Gebot i.D.
    6 Angebote
    Build a FinTech App 6 Tage left
    VERIFIZIERT

    Looking for experienced Agency with a MUST HAVE experience in Open Banking API integration, PSD2 and GDPR regulations, RegTech experience in a Plus, verified delivery of similar project

    €2339 (Avg Bid)
    €2339 Gebot i.D.
    42 Angebote

    I am working on a mobile app and I have a need of mobile app full stack developer with basic requirements like React/Flutter and backend experience.

    €465 (Avg Bid)
    €465 Gebot i.D.
    45 Angebote

    REMARK: AVOID FAKE BID!!! 1. Cannot Send Base64 Images to api. 2. Need a unblock user api 3. Block and User Api -- ** We block a user then in user api we get this: { "errors": [ { "message": "'User' object is not subscriptable" }, { "message": "'User' object is not subscriptable" } ], 4. Default Picker API--- ** Stored Fields ...

    €128 (Avg Bid)
    €128 Gebot i.D.
    10 Angebote

    Нужен бэкенд разработчик который уже работал с CMS Tamaranga DO и хорошо в ней разбирается. Есть дизайн и верстка, нужно сделать натяжку верстки, а также написать доп. функционал: Проверка VIN, Последние поиски, Заявки аренды, Отзывы и т.д. По запросу отправлю детали в ЛС.

    €210 - €631
    Versiegelt
    €210 - €631
    9 Angebote
    Build me an App (database driven) 5 Tage left
    VERIFIZIERT

    The App is rather simple. It is mostly database handling, and searches based on criteria. The app is to be coded for both Android and iPhones. Frontend and backend development required. The App is a sport athlete database (picture, age, weight, height, sport category, sport level, location based on address, ...) Athletes can do multiple sports. Each athlete can then have a different level of exp...

    €615 (Avg Bid)
    €615 Gebot i.D.
    47 Angebote

    Templfic is a web app recently built for digital Etsy Sellers. Thousands of people sell digital templates on Etsy in the wedding/event space. Templific allows Etsy Sellers to design their digital templates to sell in their Etsy Shops with the option to let prospective buyers test out the templates before purchase and then customize their templates (Change info, font type etc). The app and API ...

    €515 (Avg Bid)
    €515 Gebot i.D.
    32 Angebote
    Senior Python Programmer needed 5 Tage left
    VERIFIZIERT

    Gluu is an open source digital identity platform. We're building a new cloud hosted offering, and we need a Python programmer to call various API's and to connect some of the moving parts. This is a long term opportunity that will enable you to learn a lot of new skills on the job, and help us to build a world class identity SaaS. You must have experience with the Flask framework, be co...

    €134 (Avg Bid)
    €134 Gebot i.D.
    18 Angebote
    Full Stack Developer wanted! 5 Tage left
    VERIFIZIERT

    Hello! At Nord Tech Systems, LLC we are looking for motivated developers for reoccurring work. Thanks! Founder & CEO Tom Wilson Nord Tech Systems, LLC

    €18 / hr (Avg Bid)
    NDA
    €18 / hr Gebot i.D.
    113 Angebote

    I would like something to assist me in the creation of my new video game (this will include making some core game mechanic in unity) I would also like some help on the backend (the whole authentication + saving / loading from a server and IAP / Ads) Feel free to contact me for more information

    €11 / hr (Avg Bid)
    €11 / hr Gebot i.D.
    15 Angebote
    Backend на node js 5 Tage left
    VERIFIZIERT

    Нужно разработать backend на node.js для платежного сервиса (с использованием криптовалюты). ТЗ платежного сервиса - [Zur Anzeige der URL Anmelden] Отдельное ТЗ связанное с криптой - [Zur Anzeige der URL Anmelden] Фронт еще делается, но большая часть уже реализована - [Zur Anzeige der URL Anmelden] И на всякий случай высылаю дизайн самого сервиса - [Zur Anzeige der URL Anmelden]:1190

    €210 - €631
    Versiegelt
    €210 - €631
    14 Angebote

    -The idea is to build a program that allows the master user to trade multiple accounts the same way at the same time(every account will execute same orders in proportion of the master account capital OR in a preset ratio that master trader decides ) this way master will trade multiple accounts simultaneously, saving a lot of time. -Program will handle only spot trades and spot trades with margin,....

    €661 (Avg Bid)
    €661 Gebot i.D.
    23 Angebote

    REMARK: AVOID FAKE BID!!! 1. Cannot Send Base64 Images to api. 2. Need a unblock user api 3. Block and User Api -- ** We block a user then in user api we get this: { "errors": [ { "message": "'User' object is not subscriptable" }, { "message": "'User' object is not subscriptable" } ], 4. Default Picker API--- ** Stored Fields ...

    €124 (Avg Bid)
    €124 Gebot i.D.
    10 Angebote

    This app would allow homeschool students, enrolled with a recognized brand, to access online video lessons and lesson content (modified with gamification). I would like a bilingual freelancer who can speak both English and Spanish. The app will be in English but the communications during the project should be in Spanish. -- Esta aplicación permitiría a los estudiantes de edu...

    €4029 (Avg Bid)
    €4029 Gebot i.D.
    32 Angebote

    Hola, tenemos diseñada una aplicación y una web que consta de: - perfil propio - localización - subscripción - buscador de otros perfiles y ordenar por diferentes reglas - añadirlos a favoritos - chat incluido en la aplicación - mapa para encontrar otros usuarios. Buscamos programador que pueda realizar el desarrollo. Preferible en español ...

    €14 / hr (Avg Bid)
    €14 / hr Gebot i.D.
    26 Angebote

    1. Cannot Send Base64 Images to api. 2. Need a unblock user api 3. Block and User Api -- ** We block a user then in user api we get this: { "errors": [ { "message": "'User' object is not subscriptable" }, { "message": "'User' object is not subscriptable" } ], 4. Default Picker API--- ** Stored Fields are Missing. ** Please star...

    €127 (Avg Bid)
    €127 Gebot i.D.
    5 Angebote

    Need all the features of a dating site, voice , video, chat, notifications, video streaming,...etc. Looking for a team or individuals for frontend, backend or both. Strong CS background is important. Good knowledge of Clean coding , SOLID principles, Test driven design, QA, CI/CD...etc, for an awesome social network app that will support Millions of users . Need App for IOS , Android & Web.

    €25 / hr (Avg Bid)
    €25 / hr Gebot i.D.
    76 Angebote

    1. Cannot Send Base64 Images to api. 2. Need a unblock user api 3. Block and User Api -- ** We block a user then in user api we get this: { "errors": [ { "message": "'User' object is not subscriptable" }, { "message": "'User' object is not subscriptable" } ], 4. De...

    €98 (Avg Bid)
    €98 Gebot i.D.
    7 Angebote

    I have a video processing script but the output videos generated has some issues around the lips area (see attachment). The script is written in Python and hosted on AWS cloud. I'm looking for someone who is expert in the video processing field to provide an automated solution that will enhance the facial features and blurry area around the mouth for all the generated output videos. The sol...

    €124 (Avg Bid)
    €124 Gebot i.D.
    8 Angebote

    I am looking for someone who knows Javascript and can push dynamic purchase data into an integration from Tapfiliate. Understanding of GoHighLevel, ClickFunnels, or other funnel building software is a plus since that would mean you understand how data gets passed, but as long as we can get the integration working, that is the main concern. This shouldn't be something that takes a long time bu...

    €31 / hr (Avg Bid)
    €31 / hr Gebot i.D.
    21 Angebote
    DJANGO , PYTHON, GraphQL 4 Tage left
    VERIFIZIERT

    1. Cannot Send Base64 Images to api. 2. Need a unblock user api 3. Block and User Api -- ** We block a user then in user api we get this: { "errors": [ { "message": "'User' object is not subscriptable" }, { "message": "'User' object is not subscriptable" } ], 4. De...

    €98 (Avg Bid)
    €98 Gebot i.D.
    7 Angebote

    We are looking for a php laravel experienced web developer to develop/fix a job portal platform. The platform is almost ready, but some of the required features don't work perfectly. Those must be fixed and some new required features must add. The project concern to back-end and front-end development. I will review you bid and contact your personally with the full project documentation for...

    €916 (Avg Bid)
    €916 Gebot i.D.
    197 Angebote
    Facebook Push Notification 4 Tage left
    VERIFIZIERT

    I want to push notifications on customers Facebook messenger via API endpoint.

    €145 (Avg Bid)
    €145 Gebot i.D.
    4 Angebote

    REMARK: AVOID FAKE BID !!! READ DETAILS !!! A/ FIX API ERRORS Apis-- 1. User Api - zodiacSign will be Int (because it will be picked from default picker) ethnicity will be Int (because it will be picked from default picker) Remove all JSON String and convert them to List of strings 2. Block and User API - it was worknig previously when tested. But today it is blocking. but it is not showing bl...

    €167 (Avg Bid)
    €167 Gebot i.D.
    7 Angebote
    Unique Project 4 Tage left

    Project for final year based on web development

    €234 (Avg Bid)
    €234 Gebot i.D.
    13 Angebote
    api convert from php to node. 3 Tage left
    VERIFIZIERT

    I have an opensource api in php that i was using in one of my projects but they dont allow it for other projects now so i need it to be converted it into Node so that i can incorporate it in my backend and use it. It is an api that takes a url and calculates the carbon emission for that website and returns it link:- [Zur Anzeige der URL Anmelden] My download files for ? or atleast if you can und...

    €32 (Avg Bid)
    €32 Gebot i.D.
    5 Angebote
    Apple project 3 Tage left
    VERIFIZIERT

    Java back end. I need someone who is experience in giving job support to apple client

    €154 (Avg Bid)
    €154 Gebot i.D.
    17 Angebote

    Bonjour, Nous cherchons à fédérer un réseau d'apporteurs d'affaires, leur mission est simple : Recenser en trois clics, sur notre plateforme, les besoins en prestataires informatiques (architecte logiciel, développeurs, MOA, MOE...) de l'entreprise pour laquelle ils travaillent. Nous nous servons ensuite de ces données pour trouver le pres...

    €2250 (Avg Bid)
    €2250 Gebot i.D.
    5 Angebote

    I represent a French company and I'm looking for longterme partenership with 1 front-end and 1 back-end freelancer.

    €7266 (Avg Bid)
    €7266 Gebot i.D.
    96 Angebote
    Mobile App Back End Dev 1 2 Tage left
    VERIFIZIERT

    Need Reliable Responsive Developer / Team / Company with expertise in setting up Back End Services for a Straightforward 5 Function, Front End Mobile App, using Google Cloud Platform. Must be GCP Expert & Very Experienced in optimizing GCP for lowering cost & achieving highest Productivity. Must be expert in implementing GCP API, Security, load balancing scaling features, etc. Mus...

    €410 (Avg Bid)
    €410 Gebot i.D.
    28 Angebote

    Paperplane offers the doctors with a dashboard which has all the relevant patient and medical data. The dashboard helps the doctor manage appointments (offline and online), patient data, business metrics and aids the doctor to undertake marketing campaigns. 24x7 WhatsApp virtual assistant facility aids the patients to reach the doctor anytime and perform actions like book appointments, receive pre...

    €683 (Avg Bid)
    €683 Gebot i.D.
    5 Angebote
    Build a website 2 Tage left

    Need some peoples who can Build a website by doing coding. At least know proper backend

    €95 (Avg Bid)
    €95 Gebot i.D.
    24 Angebote
    Background Verification 2 Tage left
    VERIFIZIERT

    We need candidates who can initiate Background verification for our renowned clients. Our clients are L&T, TCS, WIPRO, and many others. The minimum qualification should be a Class 12 pass. Applicant should have a laptop or computer with an Internet connection to perform this work.

    €12 (Avg Bid)
    €12 Gebot i.D.
    24 Angebote

    I need someone who will create a web interface for Speedify on Raspberry PI. I need to be able to switch the service on and off, see connected devices, upload and download of connection, total data transfer for each device, see to which server I am connected to and possibly the CPU temp and utilization. Speedify offers Python libraries to use and take basically anything from Speedify on Linux. [Z...

    €143 (Avg Bid)
    €143 Gebot i.D.
    6 Angebote

    Descrição: Um sistema P2P que permita a transferência de arquivos de vídeo com mais de 1gb entre peers, utilizando tcp e udp como protocolo da camada de transporte (não precisa de interface, tem q funcionar via terminal mesmo). Exemplo: [Zur Anzeige der URL Anmelden] Para mais detalhes, entrar em contato.

    €140 (Avg Bid)
    €140 Gebot i.D.
    2 Angebote
    React native app 6 Stunden left

    Need a app in which a buyer buys a service after that a admin will assign his employee to chat with the client. I have attached the work flow diagram below. Note:-App needs to be created in react native

    €186 (Avg Bid)
    €186 Gebot i.D.
    19 Angebote

    We are a digital community, networking and events provider. Our clients deliver value to end users by letting them participate in events and form connections with other users who share their interests and can inform their study, career, and other important decisions. We need to improve our live event video and presentation streaming capability. We require a tight API integration with a reliable...

    €5527 (Avg Bid)
    €5527 Gebot i.D.
    23 Angebote

    We already have a frontend e-commerce website, created from scratch (html, js, css, Bootstrap etc). What we need right now, is for someone to implement this frontend website (theme) to Wordpress. Because we are interested in Wordpress backend administration. We aslo need someone to implement 3-4 different APIs from our suppliers to Wordpress and our e-commerce website. If you have any questions...

    €10 / hr (Avg Bid)
    €10 / hr Gebot i.D.
    49 Angebote
    RewriteEngine - Homepage - HTACESS 3 Stunden left
    VERIFIZIERT

    RewriteEngine - Homepage - HTACESS

    €20 (Avg Bid)
    €20 Gebot i.D.
    9 Angebote

    Looking for a Senior Dotnet developer to work full time (Monday to Friday) in a small remotely based team. It's an ongoing project with lots of Api's and complex architecture. Please only apply if you have experience working on large scale projects. You must have: Minimum 5+ years of hands-on software development experience with .NET framework. Hands-on experience in C#, WebApi, Design...

    €9 / hr (Avg Bid)
    €9 / hr Gebot i.D.
    33 Angebote

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