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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    36 jobs found, pricing in USD
    C#/.NET Core & Java Developer 6 days left
    VERIFIED

    Hello, We are looking for a senior-level full-stack web engineer with experience in .NET Core and Java who can join us and help with building a large platform. English needs to be at an advanced level and any experience in leading a small team of developers would be a big plus. I look forward to seeing your proposal. Thank you

    $22 / hr (Avg Bid)
    $22 / hr Avg Bid
    29 bids

    Looking for someone to create the code/backend to a profit/loss tracker for Solana. The platform would allow user to log in with their Phantom wallet and see their profit/loss on all trades made on that account. I have the UI kits ready but need all the coding, please have experience

    $1212 (Avg Bid)
    $1212 Avg Bid
    50 bids

    I'm looking for senior PHP developer (upto 10 freelancers) having sound knowledge of backend development (PHP, Laravel, CodeIgniter, API implementation, Payment gateway integration, etc). Please bid if you are available for long term Full Time position. Please start your proposal with the word "success" and share your past projects Looking forward to working with you

    $511 (Avg Bid)
    $511 Avg Bid
    45 bids

    I have an Android and iOS app that tracks an user steps with Google Fit / Apple Health API, and it rewards the user with a coin based on the number of steps the user has gotten. It also uses a backend simple program to get and publish certain data to the app. I need to add functionality to both apps (the Android and the iOS version). I need to add an option to pick a sport (from a list that the app should show), and let the user start and stop a timer. When the user stops the timer, and based on the sport the user had chosen, it will give him a number of coins. Please, have in mind that this is a very simple project, and I'll have an appropriate maximum budget.

    $188 (Avg Bid)
    $188 Avg Bid
    27 bids
    Photographer website 6 days left
    VERIFIED

    I'm a professional photographer: I need to develop my new website portfolio. I will provide the designs. The design of the website is minimal and bold, but I will have to publish lot of galleries with images, so I need something extremely functional and fast (maybe with a back office?) No time wasters.

    $180 (Avg Bid)
    $180 Avg Bid
    124 bids

    we required a nodeJS backend developer for dynamic pages and Dash board for

    $32 (Avg Bid)
    $32 Avg Bid
    7 bids

    I am looking for someone to modernize my websites backend. Currently the website only uses the Entity frame work of .NET in order to connect to the MSQL Database where all the logic is then processed in Stored procedures. I am looking for a talented developer who can replace the stored procedures and use the entity framework to realize the same logic. The website consists of multiple module with user profiles, login, registration, blog and other modules (these use information from the other modules). If you feel up for the task feel free to contact me!

    $181 (Avg Bid)
    $181 Avg Bid
    35 bids

    The aim of this task is to get via postman every time I click send, the cookie and authorisation and paste it in heather's tab in key and value. Now I manually get the cookie and authorisation in the network tab under inspection in the browser. Why? because it changes every time i login into the URL. Note: Job will be done remotely connected to my laptop.

    $12 (Avg Bid)
    $12 Avg Bid
    11 bids

    We are looking to hire a part-time Python Django developer having 4+ years exp in the long run. Our website Share your portfolio. We will like to interview over the google meet.

    $344 (Avg Bid)
    $344 Avg Bid
    17 bids
    .net core 5 days left
    VERIFIED

    Some one to help me in add and retrieve the attachments , and some other points in .net core . (Arabic language )

    $28 / hr (Avg Bid)
    $28 / hr Avg Bid
    73 bids

    I want to integrate into my system a webscraper interface, whereby my customers determine what to scrape (usually their own website). They don't need to be running scrapes or seeing the data, but they should set up 'what to scrape', and then we take it from there. If you have suggestions or white label software i'm also open to that. Hope that makes sense! Thanks.

    $48 / hr (Avg Bid)
    $48 / hr Avg Bid
    54 bids

    I need more than 5 years experience blockchain developer that can do backend and integrated smart contact to the site. I need the site to be similar to . I already have react project website design done as what you need to do is to create backend and integrated smart contract. My site is , so you need to continue develop from this point.

    $1587 (Avg Bid)
    $1587 Avg Bid
    86 bids
    Web developer 4 days left

    Project-based web developer needed

    $2 / hr (Avg Bid)
    $2 / hr Avg Bid
    12 bids

    I need a website with payment options.

    $294 (Avg Bid)
    $294 Avg Bid
    19 bids

    Google maps Services. GPS Tracking, live locations. QR Code Scanner. Security. Payment. Customers Service Chat. Notifications. Ex: "Marti" App

    $1250 (Avg Bid)
    $1250 Avg Bid
    62 bids

    4 numbering lucky draw system, lucky number feeds through the mobile app, we have different lucky draw numbering system, A,B,C,D - Default Format, all feeds need time stamps and manual time configuration. Example (Morning 06:00 AM to Evening 2.30 PM). Output of total the total user input feed export as a excel sheet from the admin panel login. once backup-ed the data we can clear the database.

    $262 (Avg Bid)
    $262 Avg Bid
    9 bids

    Dear freelancer, i need a Venue booking app, for such as meeting rooms, sport Venues, swimming pools and anything related. requirements: - design and development full solution. -user IOS and android. (flutter/ react) frontend - provider app - owner backend panel + app. features are: search by venue/ activity. selecting time and date, kindly if you did such project before include a demo or screenshots of the app you made.

    $2659 (Avg Bid)
    $2659 Avg Bid
    155 bids

    Greetings, i am looking for someone who has verified their google app (/project) in console.cloud.google.com. The app/project must have following scopes: if you know what you are reading then it think that's enough to explain what i am looking for.. 1. Priority will be given whom project has more scope verified 2. Priority will be given to whom don't need the google account any longer and can transfer ownership to me. thanks in advance && happy bidding best regards

    $10 - $100
    Sealed
    $10 - $100
    2 bids

    The code would be developed in Javascript/typescript to read stock data from the market and then put buy or sell orders based on strategies.

    $7 / hr (Avg Bid)
    $7 / hr Avg Bid
    16 bids
    Gaming Website Backend 3 days left
    VERIFIED

    ill send description in depth but the overall gist of the project is to do a backend that allow users to search for matches and report the outcomes of the match.

    $1104 (Avg Bid)
    $1104 Avg Bid
    84 bids

    We have a project already developed with a web admin panel for an App (Winzy) and APIs coded which when hit via a http call return response in JSON format. We need someone to fix a current OTP issue and correct it with current DLT platform requirements. So your job would be to access the existing code base and make the necessary changes to enable the web admin panel as well the APIs. Also you would have to work on adding new APIs if required. Experience in developing Push notification is added advantage. Any additional queries would be resolved via chat or a call.

    $122 (Avg Bid)
    $122 Avg Bid
    24 bids

    We need a mobile application that will be written in Flutter or another hybrid language. We will apply some css codes to the application that needs good css knowledge. We can work together in the backend depending on the situation.

    $548 (Avg Bid)
    $548 Avg Bid
    74 bids

    A game that we wish to launch through a personal website Website needs: + Everything built from scratch (no Wordpress etc.) and optimized for speed + Signup (confirmation code on email) and Login system for clients, allowing for PayPal transactions + Multi-layer avatar creation + Responsiveness, screen rotation + The application should be created as microservices to be easily scaled Details: + Full website specifications are ready to be provided after signing an NDA + We provide the design as icons, photos and mockups + No requirement on the backend and frontend programming language. Deadline: 15th November Proposal: + Please submit proposal only if you know that you can start as soon as possible, as the deadline is hard + When submitting a proposal, show us a portofolio with your wor...

    $1310 (Avg Bid)
    $1310 Avg Bid
    66 bids

    you need to write from scratch the software for the game with live dealers.

    $12075 (Avg Bid)
    $12075 Avg Bid
    32 bids

    We want to build a Shopify App that integrates a Shopify Store with our service. Full briefing attached.

    $2272 (Avg Bid)
    $2272 Avg Bid
    74 bids

    Hi, I have a PHP script installed on my server that has a Proxy feature included, this feature is not working and the proxies are not added or not working, I need someone with good experience to fix that issue and let the proxies work fine on my PHP script, preferable backend developer with a server technical background. I will give more details about my server and PhP script for the right one. Thanks

    $15 / hr (Avg Bid)
    $15 / hr Avg Bid
    47 bids

    Hello, I need to make 2 scripts to automate tasks with the praw library in my SubReddits. In brief: Script1: Copy title + link from a list of subreddits (Source) and publish them in another list (Destination). Script2: Take each of the posts published in the list (Destination) And crosspost to a new list of SubReddits. If you have worked with the Reddit API you will understand quickly when I send you the exact details. Please if you don't have experience with Reddit API don't bid. I've wasted a lot of time with people who don't know how to handle it. My maximum budget is 100$. Note: If you are interested read the description and send me your budget, I can adapt to your price. If you have experience with praw library please write me and I will give you ful...

    $87 (Avg Bid)
    $87 Avg Bid
    23 bids

    We are searching for Full-Stack Developer to join and support our growing team. In this position you should be comfortable around both front-end and back-end coding languages, development frameworks and third-party libraries. You should also be a team player with a knack for visual design and utility. If you’re also familiar with Agile methodologies, we’d like to meet you. Responsibilities: Design client-side and server-side architecture Build the front-end of applications through appealing visual design Develop and manage well-functioning databases and applications Write effective APIs Test software to ensure responsiveness and efficiency Troubleshoot, debug and upgrade code Create security and data protection settings Write technical documentation Work with data scientist...

    $4073 (Avg Bid)
    $4073 Avg Bid
    77 bids

    INVESTMENT WEBSITEVFOR BOTH FRONT END AND BACK END ,WEBSITE MAINTAINENCE

    $231 (Avg Bid)
    $231 Avg Bid
    10 bids

    Required qualifications: Interest and enthusiasm for Artificial Intelligence and Machine Learning Proven ability to write clean code Strong Computer Science fundamentals in data structures, algorithm design, and problem solving Strong Intuition architecting, building, and scaling complex systems Collaborate with Product Designers, ML Scientists and external stakeholders to deliver compelling user-facing products Strong customer focus with ability to translate user requirements into good design Ability to take a project from scoping its requirements through to the actual launch Experience with continuous integration (CI) and continuous delivery (CD)

    $21 / hr (Avg Bid)
    $21 / hr Avg Bid
    36 bids

    Hello, We would like to build such app like this, where users can sign in and then add their social media accounts to showcase such stats in their profile! How much this will cost wit all necessary things (Frontend+backend+security+deploying+auth system etc...) and how much days? we would like to work with milestones, step by step

    $545 (Avg Bid)
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    22 bids

    Project involves building a backend to - manage building info - manage rental unit info - build list view of units - build unit template, that loads unit info. - enable hover and click feature on CSS ID named layers in .svg image See attached PDF for description and specification for this project. Solution should be contained in a plugin. The described Tabs feature is described here: https://www.freelancer.com/projects/html/Build-shortcode-functionality-show-hide/ In your bid please provide the following: 1) Your total bid amount should be for tasks 1, 2A, 2B, 3. 2) In your bid text, please price task 2B as a addon. ----------- I expect that you are experienced and can confidently estimate a bid that does not increase after we have agreed on a final price. I expect...

    $1000 - $2000
    Sealed
    $1000 - $2000
    152 bids

    Hello I need a WordPress expert to make a forum plugin. It has to link up and integrate with buddypress The specific function required is the following 1. when a logged in user creates a new post, an empty new post should simultaneously be formed in the forums consisting of just the title of the post IE user posts page with title The Lion King using two hashtags zoo and lions In the forums, a post is created with the title The Lion King 2. the empty forum post needs to be organised as per the hashtags set in the post. IE. primary hashtag = main category eg zoo secondary hashtag = subcategory eg lions title of post = title of forum post eg The Lion King 3. any comments and replies to the posts either on the post page or to the post in the forums need to reflect in both places in rea...

    $186 (Avg Bid)
    $186 Avg Bid
    86 bids
    eComLovers.com 2 days left

    Olá! Tudo bem? Somos uma Startup de Recrutamento e Seleção com banco de talentos. Hoje eu tenho um site: Este site foi um MVP que deu certo para o meu negócio. Ele foi feito em Wordpress + Google Workspace (Planilhas + Forms). Agora, eu preciso que este projeto evolua! Estou a procura de alguém que consiga transformar este site em um appweb com cadastro de usuário, para que cada cliente (usuário) consiga subir o seu perfil e habilidades (que hoje ele sobe via google forms), consiga também atualizar o seu perfil quando quiser (como no linkedin). Em tópicos o projeto se resume a isto: - Front (app web) para cadastro do perfil. Tipo linkedin profile mas com o estilo/UI do meu site atual, com corações e apenas p...

    $186 (Avg Bid)
    $186 Avg Bid
    13 bids

    Flutter veya baska bir hybrid dil ile yazilacak mobil uygulamaya ihtiyacimiz var css bilgisinin iyi olmasi gerekli uygulamaya bazi css kodlari uygulayacagiz . duruma gore backend icinde beraber calisabiliriz .

    $422 (Avg Bid)
    $422 Avg Bid
    18 bids

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