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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    51 jobs found, pricing in USD

    I want to remove this post from Reddit, I've reached out to several freelancers and contact Reddit support, but all in vain.

    $501 (Avg Bid)
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    Quick project for a programmer, estimated: 1-3 hours. Need somebody to configure 3 flows in the botpress studio. The sistem, system is already installed on a VPS. --- The studio editor looks like this: Documentation on how to configure it can be found here: I will provide access to botpress studio interface. --- Requirements: 1. on click open chat icon, send initial messages: text1 2. send text2 3. send 3 options user can choose from (option_a, option_b, option_c) and wait for answer 4. for each option, create 3 different sub-flows. [option_a flow] 5. send text3 and wait for answer 6. send 2 options (option_d, option_e) and wait for answer 7. send text3 8. send all chat history so far, by email 9. if option_d AND ( (time is between two [17:30 – 9:15]) OR (is saturday) OR (...

    $93 (Avg Bid)
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    I am looking for a backend developer to set up a system where I can: - Input new partners - Upload Documents - Integrate a payment system (Stripe) - Integrate a CRM system (Salesforce or anything) - Automated Emailing for order confirmations (to key stakeholders) - Mailchimp or another platform - Collect and manage the data received from the purchase orders - Creat blog posts for social media outlets. The frontend has been developed on React.js

    $429 (Avg Bid)
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    I am looking for guidance on the best approach for using an external database (Xano) to hold my user information. I am building the first app for our business on Bubble, but will likely use other platforms down the line to create native apps, admin pages, etc. I know how to connect the backend to Bubble through APIs, and how to get and use an authentication token. However, I'm having a hard time figuring out the best way to manage the various states/pathways (log-in, stay logged in, log out, sign-up) without using Bubble's user type database.

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    Our organization own an online web platform writen in php. The structure is complicated and has many modules. We need one experienced in php developer as a new member of the team to work on daily basis (6/7) for 4 hours per day for long time with daily basis briefing. Every time we start a new module we set a timetable estimation but the project is hourly paid because every day we test and change our plans and directions if this is mandatory for the project.

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    We are setting up a team to make trading activities using APIs. The trading signals (bidding / buying) will be provided by a 3rd party (Let's call it the trading data source) and then with this signals there will be some data management (like filtering and ranking) and finally these ranked signals will be used to make actual bids.

    $20 / hr (Avg Bid)
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    Sebusca equipo con desarrolador frontend, y backend, QA y diseñador para realizar los bocetos de la plataforma y creación estructura inicial. Uso de sicmap y satelite sentinel para identificar parcelas. Hito1:Plasmar la idea en unos bocetos y pantallas Inicialmente se transformará la idea mediante bocetos la idea del proyecto

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    Hi! I work for company now needed release custom service. We need website developement to help us build the front and back end system for our website based on woocommence and wordpress. In conclusion, we need your help to develope a system that connects cases artists and customers, once the customer order our customize case service, the order will send to the cooresponding artist to design. How it works: Artist collects customers ideas or pictures, and then shows customers inspiration or materials customers provided on a phone case by drawing. customers will receive a design surprise and a unique phone case. Customers upload the inspiration and ideas with photos, text, stamp or meaningful words, main color and style they choose. What you need to do: 1. Back-end development: - Form seri...

    $29233 (Avg Bid)
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    website develope 6 days left

    Hi! I work for company now needed release custom service. We need website developement to help us build the front and back end system for our website based on woocommence and wordpress. In conclusion, we need your help to develope a system that connects cases artists and customers, once the customer order our customize case service, the order will send to the cooresponding artist to design. How it works: Artist collects customers ideas or pictures, and then shows customers inspiration or materials customers provided on a phone case by drawing. customers will receive a design surprise and a unique phone case. Customers upload the inspiration and ideas with photos, text, stamp or meaningful words, main color and style they choose. What you need to do: 1. Back-end development: - Form ser...

    $31756 (Avg Bid)
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    We are looking to build a single platform on which we will be able to sell various insurance like Life, Health and motor and as well as lend money to people. Incase of Insurance, platform should be able to showcase products, capture customer requirements, show product details and help in customer acquisition. After that the customer is converted, he/she should be able to do claim settlements and raise concerns in case of issue. Incase of money lending, customer should be able to request for loan and settle his loan(like payment of EMI) on single platform.

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    low budget. I will explain personally

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    PHP developer for Android app 5 days left
    VERIFIED

    I'm an individual android app developer. I'm developing a job application like freelancer and Upwork. I need only help to connect with MySQL. Also I need to send notifications for PHP to android app. And more. My budget is very low because I need only help. Please Indian only because I need to discuss the project on call

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    Note this is 2 app 1st app : add auth use third party API for my app API means API of app marketplace, deploy frontend, backend and domain, 2nd app: Build me a web messaging all features included use sdk and use third party API for my app means API of App marketplace, both needs API, ill Explain the API low budget dev under $200 if you can do this 2 apps for $200 we can start. Note we need to start it this week. thanks

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    Erc 721 smart contract with following functions : - minting - whitelist sale - public sale possible public sale no2 - nft on stored on blockchain not on ipfs - minting for founder and for airdrop ( specific number of nft) - ability to trade nft on website ( exchange nft - no buy sell) - connection with all possible wallets integration ( using wallet connect) - royalty fee for each transaction including transfer ( trade) - ability to trade different number of nft to different number ( expl i will give you 2 nfs for 1 of yours)( exhange) - random mint, ( not one after another) - integration with open sea or immutable x marketplace - no front end work just integration with website ( create minting button) and web3. - deploy on live net ( Ethereum blockchain) i will provide similar contract...

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    Good evening everyone. I own an online casino site with slots, roulette, virtual games, live casino and I am looking for a developer to build a backend for my site. My games have been installed on my site through an API and the backend has to show all game statistics. My current backend was built with Lavarel. I leave below the credentials of an example backend that has all the functions that my new backend should have. Backend: Username: GRGMRN Passwor: 123456 Contact me if you are really interested in the realization of the backend, we can talk privately or on WhatsApp / Telegram.

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    Need an experienced web developer who is very good at frontend to build a dynamic website. Please message me for more details and we shall discuss more on the requirements.

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    Income Verification Report 5 days left
    VERIFIED

    I´m looking for a programmer to help me develop an income verification report using an Open Banking API of which is a Latin American API platform. Basically the report will look like the following attachment. This report is for consumer banking organizations; non-bank lenders, landlords and other users to verify the income of people requesting consumer credit or leasing of properties. Please view the attached sample report for guidance. The system will require a back-end for admin and user access and also a payment processor integration to charge per report generated. The user will login, and insert their banking credentials and authorize the generation of the report, then they will select the customer that will receive this report. One copy will be sent to their email addres...

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    Hello, We are looking for talented people to join our team. This is a full-time remote position.

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    REST- Ful Web Service API Task needs to be completed in next 36-48 Hours

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    Need Expert WordPress Developer Needed Who able to create theme and plugins ? Who develop theme from scratch ? Timings -9am to 5pm CDT Salary Negotiable for right candidate

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    Website and Developer Portal required to provide weather forecasting services. Reference:

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    Hi, I want to develop iOS/Android game app (including Mahjong and poker may slot machines). I also need to create a backend and admin panel for this project for membership management and points top up and transfer/winning and loss tracking. The download method should be like Natural 8 which uses super signature.

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    Share your ideas and if favorable then we will prefer to initiate the project.

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    Engineering final year projects related to Machine learning

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    An online platform where clients and individuals can view per unit rate of construction materials and other materials, including cost of hiring of equipment per day in a particular location. Other services would include Selection of competent professionals, contractors (construction/ engineering companies) and potential material suppliers. The platform would have two ends. The First end would be the clients (subscribers) and the second end would comprise of three categories: Estimators, Professional and Contractors (company). The Estimators: they're qualified and/or experienced individuals (quantity surveyors, engineers, business owners, marketers, etc.) that would be responsible for providing on a daily basis market prices of construction materials and equipment. They would be requi...

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    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.

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    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...

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    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.

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    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

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    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

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    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

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    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

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    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

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    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.

    $41 / hr (Avg Bid)
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    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

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    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 ...

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    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.

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    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

    $21 / hr (Avg Bid)
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    19 bids

    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

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    Membership space for a fitness, network marketing organization.

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    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...

    $245 / hr (Avg Bid)
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    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.

    $11 / hr (Avg Bid)
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    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...

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    Need a big commerce pro for an urgent BC project

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    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...

    $250 - $750
    Sealed
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    34 bids
    AI GPT3 tech Ended
    VERIFIED

    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.

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    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

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    Modalidad: Remoto. Full Time (8 hs de Lunes a Viernes). Fin: Marzo 2022, con posibilidad de extension para proximo proyecto. Sitio web de declaracion de impuestos anual con backend en nodejs, expressjs, sequielize y mysql. El proyecto se encuentra en etapa de desarrollo, cerca de la finalizacion. La salida a produccion es en Febrero y durante DIciembre y Enero se estarán realizando las pruebas y correcciones necesarias que pueden abarcar una serie de tareas (integraciones, desarrollo de endpoints, creacion de tablas, aramdo de archivo XML con libreria js2xmlparser). El mayor compromiso y dedicación será requerido en los meses de Diciembre, Enero y luego durante Febrero y Marzo se deberá brindar el soporte durante la salida a produccion.

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    Android ve IOS cihazlarda çalışacak PTT ( Puch to talk ) Bas-konuş platfomu yazdırmak istiyoruz örnek ürün:

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    Quiero hacer una app y necesito la persona adecuada. Madrid

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