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.

Alkalmazza Backend Developers szabadúszót

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    32 munka, árazás ebben: EUR

    We are looking to hire 5 developers with strong Nodejs & Mysql backgrounds. Ideally someone who is a power user of mysql and have experienced with code refactoring in nodeJs realm. Each of the hired developer will be working with our existing team and hence must be available during official working hours. We are pretty much flexible company and try to compensate/reward well for good performers. This is a long term contract.

    €29 / hr (Avg Bid)
    €29 / hr licitátlag
    6 árajánlat

    This is our website: We use Shopify. I am experiencing a big problem with Facebook Pixel tracking. Let me explain… The Pixel is over attributing Adds to Cart, Initiated Checkouts, Purchasses, Conversion Value, etc. The store traffic and clicks is tracking correctly. This is my client’s accont. They installed the pixel like 2 years ago. Maybe they did something wrong back then. The conversión API is also installed. I’ve already connected and disconnected the pixel through partners integration and nothing changes. What is annoying is that when I test events on the events manager, it tracks all the events properly. All the PageViews, adds to cart, purchasses… It used to have deduplications or some buttons that were not tracking properly. When I first ch...

    €478 (Avg Bid)
    €478 licitátlag
    14 árajánlat

    For a project to create a website for a real estate agency, I'm looking for a professional who can manage the connection with the management system for uploading properties to the website (the management system should generate an XML file available via FTP) and the association of the characteristics of the properties with the custom fields that will be created. The website will have 3 locations on different sub domains (, , ) and therefore it will be necessary to link the correct XML for each location. The project will be developed on a Wordpress platform and a custom theme will be created with the Divi builder. WEBSITE DEVELOPMENT IS NOT REQUIRED. Delivery of the work is scheduled for the end of February 2022.

    €590 (Avg Bid)
    €590 licitátlag
    80 árajánlat

    Create a faculty research portal, displaying their research work, and te publications with abstracts maybe, the co author network, a word cloud for the research work done, and a separate director portal where he can search for the faculties

    €17 (Avg Bid)
    €17 licitátlag
    2 árajánlat

    Portal for Faculty displaying their research work and a word cloud, with an additional search field using MongoDB, and anything with backend, somewhat similar to dblp (a mini version), for our institute

    €192 (Avg Bid)
    €192 licitátlag
    3 árajánlat

    Hello, I'm looking for an individual Python-Flask expert who can help with our backend enhancements in a long term. We're using PostgreSQL as Database I can share more in detail with shortlisted candidates in private message so please include your unique and specific Python Flask experience in your proposal. Thanks

    €18 / hr (Avg Bid)
    €18 / hr licitátlag
    33 árajánlat

    Hello, I'm looking for an individual Python-Flask expert who can help with our backend enhancements in a long term. We're using PostgreSQL as Database I can share more in detail with shortlisted candidates in private message so please include your unique and specific Python Flask experience in your proposal. Thanks

    €17 / hr (Avg Bid)
    €17 / hr licitátlag
    22 árajánlat

    Needs to hire 2 Freelancers Looking for a back end developer skilled in MERN stack to assist our current team. Must be reliable with good English communication skills. Looking for individuals only - NO Agencies Message to discuss more details

    €2173 (Avg Bid)
    €2173 licitátlag
    12 árajánlat
    Seeking a Python(Flask) developer 5 nap left
    HITELESÍTETT

    Hello, I'm looking for an individual Python-Flask expert who can help with our backend enhancements in a long term. We're using PostgreSQL as Database I can share more in detail with shortlisted candidates in private message so please include your unique and specific Python Flask experience in your proposal. Thanks

    €17 / hr (Avg Bid)
    €17 / hr licitátlag
    46 árajánlat

    We are working on a product, that enables user to invest in collectables and selling fractional ownership for things they love. We building the new coinbase for collectables. People can buy and trade fraction of rare collectibles. The app exists already and need you to support the team and bringing our app top the next level. Our website: You will be part of our product team and working on tickets within a sprint. We are looking for someone who can support our backend team with 3+ NodeJs, Typescript and AWS skills. We are looking for a long term engagement, at least 3-6 month full time. If you having very well communication skills(english) and your timezone macthes CET +/- 2 hours, you could be the perfect fit we are looking for.

    €36 / hr (Avg Bid)
    €36 / hr licitátlag
    51 árajánlat

    Hello, I'm looking for an individual Python-Flask expert who can help with our backend enhancements in a long term. We're using PostgreSQL as Database I can share more in detail with shortlisted candidates in private message so please include your unique and specific Python Flask experience in your proposal. Thanks

    €19 / hr (Avg Bid)
    €19 / hr licitátlag
    41 árajánlat

    App link: Major tasks: Build guest user schema, guest cart, cart merging on login/signup, allow apis for guest users, restrict guest users from cart checkout ...

    €82 (Avg Bid)
    €82 licitátlag
    1 árajánlat

    Quiero hacer una app y necesito la persona adecuada. Madrid

    €2149 (Avg Bid)
    €2149 licitátlag
    69 árajánlat
    Add features in DOTNET Backend 5 nap left
    HITELESÍTETT

    Hello to everyone, i need a backend developer .Net Core. I need to implement some services to my application. My application stack: front end -> nextjs and backend with dotnet. I have two tasks: 1) I need to integrate Shopify products from an store. Actually I have integrated WooCommerce. 2) The application have a streaming video service. I need to integrate a VOD, and get assets. Actually I have the stream part.

    €563 (Avg Bid)
    €563 licitátlag
    32 árajánlat

    Hello, I'm looking for an individual Python-Flask expert who can help with our backend enhancements in a long term. We're using PostgreSQL as Database I can share more in detail with shortlisted candidates in private message so please include your unique and specific Python Flask experience in your proposal. Thanks

    €19 / hr (Avg Bid)
    €19 / hr licitátlag
    18 árajánlat

    Hello, I'm looking for an individual Python-Flask expert who can help with our backend enhancements in a long term. We're using PostgreSQL as Database I can share more in detail with shortlisted candidates in private message so please include your unique and specific Python Flask experience in your proposal. Thanks

    €17 / hr (Avg Bid)
    €17 / hr licitátlag
    33 árajánlat

    Membership space for a fitness, network marketing organization.

    €765 (Avg Bid)
    €765 licitátlag
    16 árajánlat

    We are looking for Senior Backend Developer, available 32-40 hours per week for a long period of time. If you are good in communication and have excellent development skills, we even want to work with you for many years! We are working on many different projects of our own, so when you finish a project you can continue working on our other projects if you like our cooperation. We prefer a long term relationship and cooperation. Current work: Continue building our Symfony web-app. We use Symfony, , Doctrine and Docker. We use Youtrack from Jetbrains for work/issue management. We want our developer to follow all modern coding guidelines. You and other backend developers will be doing code reviews to ensure great quality code. If you are interested in this job, we will take an assessmen...

    €217 / hr (Avg Bid)
    €217 / hr licitátlag
    44 árajánlat
    Back-End Web Developer - IV -- 3 4 nap left
    HITELESÍTETT

    We are looking for a back-end web developer to help with website integration, web services, and APIs. Candidates should have some or most of the following skills and experience: - Fluent in scripting languages (e.g., PHP, .Net, C#, Java, or others) - Experience with Go, Laravel, Django, Express, or other frameworks - Experience with SQL and MySQL database systems - Version control (Git) - Knowledge and experience with compliance and data security - Good problem-solving skills and analytical thinking - High attention to detail - Excellent communication - Ability to work well with a team Send us links to samples of your work.

    €10 / hr (Avg Bid)
    €10 / hr licitátlag
    12 árajánlat

    we need help in our flutter project back-end with firebase. project description: we are building an app for adding activities. something like 'Meetup' app. we have 3 user types: Customer, Provider and Admin. Customer: can register in activities, like activities, payment and browse activities as a timeline. Provider: add activities, gets notification when his activity approved by the admin, request money from admin if his activity went well. Admin: can see a list of waiting for approval activities and accept them or reject them, can see a list of waiting for payment and can accept or reject. activity flow: activity gets added by provider, then an admin approves it, then it appears in the customer activities timeline. we have done almost all the front-end job. We need help with...

    €176 (Avg Bid)
    €176 licitátlag
    21 árajánlat

    Projeto de prova de conceito para um sistema de identificação de extintores através de Qrcodes gerados para cada peça. Anexo um PDF com mais explicações

    €440 (Avg Bid)
    €440 licitátlag
    11 árajánlat
    Need an enterprise bigcommerce pro 3 nap left
    HITELESÍTETT

    Need a big commerce pro for an urgent BC project

    €12089 (Avg Bid)
    €12089 licitátlag
    38 árajánlat

    Hi, I need a good company who can do our company branding. We need a new logo, website, banners design, animated video and portfolio of our website . We are an IT company so we just need a complete rebranding of our website. If possible please let me know that we can use such technologies that our mobile apps can be ready too in same code. Our goal is to find a creative company who can think outside the box. Please bid for the complete job which includes- 1. Logo Design. 2. All graphics and banner design. 3. Portfolio in PDF of all category. 4. Website of an IT company- It includes portfolio too. 5. Mobiles apps- Hybrid 6. All images used in website should not be copied from any where. It should have all copyright owned by us. 7. Front and Backend development both inside the website...

    €221 - €663
    Rejtett
    €221 - €663
    34 árajánlat
    AI GPT3 tech 3 nap left
    HITELESÍTETT

    I need a front-end expert. Must perform this work on GPT3 technology: Please pass a uniqueID for every user w / each API call (both for Completion & the Content Filter) e.g. user = $ uniqueID. This 'user' param can be passed in the request body along with other params such as prompt, max_tokens etc.

    €487 (Avg Bid)
    €487 licitátlag
    8 árajánlat

    I want to make an app similar to snapchat dl details 1- In the map of any user who sends it, the image or video is clear 2 posts inside the Harita 3- Follow all 4- Follow friends only 5- I miss 6- Find places 7- A blank page in the link, date and points of the benefactor 8- Publish in the story of the same Instagram page 9- It has a participation inside 10 in the wallet points 11- Advertisements anywhere on the map or story, and the end of the video is the same as Snap 12 Chat and message the site And send a video, photo or file 13- Voice call 14- It has a private account and a commercial account 15- There is a user in attendance, notification, deletion or acceptance in private messages 16- In dark and in normal in America I mean so

    €13921 (Avg Bid)
    €13921 licitátlag
    48 árajánlat

    We are looking for an experienced node Js Developer. Must be experienced in handling Node JS applications and micro service architecture with postgres DB

    €431 (Avg Bid)
    €431 licitátlag
    9 árajánlat

    Experienced Goland cloud developer with domain driven development (DDD) is required. Ability to work independently and handle communication is expected

    €22 / hr (Avg Bid)
    €22 / hr licitátlag
    2 árajánlat

    I'm a sole frontend developer working on a "site builder" like application. ​ At the moment, users can create "sites" and host them on a subdomain "*." (All subdomains are stored on a Postgres database with a Graphql backend). The app is hosted on Vercel and is linked to a wildcard domain. The subdomain is then parsed from the host on the frontend and used for requests. Now I'd like users to add their own purchased domains to my site, but I have no idea how to go about this. So I need someone to help me set this up, and ensure that the domains are secured with SSL. I also realize that Vercel most likely can't support my use case, so I'd also need guidance in finding a tech stack that fits my needs.

    €256 (Avg Bid)
    €256 licitátlag
    4 árajánlat

    Deseo un software que me perimita comercializarlo sin miedo a que pueda ser clonado crackeado con licencias unicas y que pueda ser quien haga la activacion mostradole una pequeña demo al cliente con restricciones dirigido negocios de servicio tecnico ya sea celular, computacion o electronica, el fin es que las personas puedan obtener el sistema y personalizarlo con los datos de su empresa sin importar en que parte de latino america este se puedan personalizar algunos datos fiscales, el fin es poder organizar las ordenes de reparacion entradas y salidas por marca modelo y descripcion se pueda imprimir hoja de servicio para el cliente y para la organizacion del talle el sistema a realizar es basado en un software que poseo y use una vez

    €178 (Avg Bid)
    €178 licitátlag
    13 árajánlat
    Creation of an online casino backend 16 óra left
    HITELESÍTETT

    I am looking for a developer who is able to create a backend for my online casino site. Attached I leave you a test backend from which to take inspiration, my backend must have the same functions as this one. Username: MRNGRG Password: 123456

    €566 (Avg Bid)
    €566 licitátlag
    25 árajánlat

    I have a wordpress plugin which is using domPDF to generate pdf files. The issue is that the Arabic text is not being generated correctly because it doesn't support arabic. This library (ar-PHP) solves the issue and i would like to use it as per the below example This is a detailed explanation of how we can use ar-PHP library with domPDF. However the above explanation is old new version of AR-PHP was released to be compatible with PHP 7 So now i need someone who can understand what should be done from the above links and do it using the new release. Task needs to be done within the next hour.

    €19 (Avg Bid)
    €19 licitátlag
    4 árajánlat
    php Laravel developer needed -- 2 3 nap left
    HITELESÍTETT

    Hello all, 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 and also testing the platform. I will review you bid and contact your personally with the full project documentation for you to review in

    €1014 (Avg Bid)
    €1014 licitátlag
    227 árajánlat

    A legjobb Backend Development közösségi cikkek