Backend Development Jobs

Backend Development is a critical part of any website or software product. It starts with understanding the client's goals and developing solutions that achieve those goals in a cost-effective and scalable way. Backend developers are responsible for more than just code: they have to have a strong understanding of databases, frameworks, and development in general. A backend developer uses this knowledge to turn complicated customer requirements into a efficient, automated solutions that the user experience (UX) team can work with.

When it comes to Backend Development, experience matters - you want someone who's seen a variety of projects and knows the best technology to use for your specific scenario.

Here's some projects that our expert Backend Developer made real:

  • Developing connected systems between websites and local servers
  • Integrating software systems using modern real-time protocols
  • Building bespoke solutions tailored to customer requirements
  • Taking over existing projects and resolving tricky bugs
  • Developing custom solutions using tried and tested frameworks

Backend Development encompasses a wide variety of skills and technologies, so it helps to have an experienced developer on your team who can navigate the complexities of building high-quality solutions. Our expert developers have already undertaken a variety of different projects and can jump into yours with confidence - benefit from their expertise, get your project completed quickly and correctly, and reduce time-to-market for your product. Get in touch today to discuss bringing your project to life, or post your own project in Freelancer.com to hire an experienced Backend Developer.

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    21 份搜到的工作,货币单位为 HKD

    Full-Stack Developer Needed for E-Learning Platform Inspired by , , We are looking for a skilled full-stack developer to create an e-learning platform (a tutorial marketplace), drawing inspiration from renowned sites like Wyzant, Preply, and Superprof. Our aim is to facilitate accessible, high-quality education for everyone, making it easy to find and connect with top educators and institutions online or in-person. - I want 4 profiles: admin teacher, academy, and students - I need it to have two types of payment: Wallet system for teachers, and direct payment for academy -Here in Algeria there is a visa card & a local card and I I want to integrate API or Stripe Ideal Candidate: Proficient in both front-end (HTML, CSS, JavaScript, React or Angular) and back-end technolo...

    $11736 - $23472
    加封
    $11736 - $23472
    51 个竞标

    We are looking for full-stack developers/Senior Mobile Software Engineers for various projects we get assigned to us. If you are interested in joining and working on different projects from time to time (mostly together with different people in different companies) these projects duration from 1 to 6-8 months. It doesn't matter what specifically you are experts in, but everyone is welcome because there is safe work in most things. To proceed with the hiring process, we kindly request that you submit your updated resume along with any additional information that you believe would support your application. This may include, but is not limited to, professional references, a portfolio of your work, or a brief cover letter detailing your interest in the position and how your qualifications...

    $156 / hr (Avg Bid)
    $156 / hr 平均报价
    109 个竞标

    I'm in need of a skilled web designer to help create a website for my start up. The website will primarily serve the purpose of e-commerce and the target audience will be business to business (B2B). Key Requirements: - The website should have a strong focus on product descriptions. - The layout must be user-friendly and easy to navigate. - Experience with e-commerce sites is required. Skills and Experience: - Proficiency in creating e-commerce websites - Experience working on B2B projects - Strong writing and communication skills - Ability to design aesthetically pleasing and functional layouts.

    $17737 (Avg Bid)
    $17737 平均报价
    101 个竞标

    I'm in need of an experienced developer to design an advanced bot for my Telegram channel. The bot will allow users to purchase digital products, such as JPG files containing valuable information, using cryptocurrencies like LTC, BTC, or ETH. The bot should be programmed to: - Process Payments: It should have secure payment processing capabilities for a smooth transaction experience for customers. - Send Automated Messages: The bot should be able to send prompt messages to users based on certain triggers. - Execute User Commands: It should understand and execute different user inputs effectively. Key Features: Admin Panel: Develop a secure and user-friendly admin panel for uploading, managing, and pricing JPG files. Product Display and Sales: Implement a catalog or list view fo...

    $36476 (Avg Bid)
    $36476 平均报价
    26 个竞标

    L’application web doit permettre aux utilisateurs de saisir les données qu’une seule fois. Les données seront ensuite reprises dans l’ensemble des documents (environ 70). Cette automatisation doit permettre un gain de temps aux utilisateurs mais aussi d’éviter les erreurs entre les différents documents générés. L’application web informe et excite l’utilisateur à chaque étape de la procédure par des alertes et des bipes. L’application web devra proposer une bibliothèque de situations conséquentes préremplis en fonction des données dans l’application web. L’application web doit prévoir une option d’ARCHIVAGE NUMERIQUE de toutes l...

    $9052 (Avg Bid)
    $9052 平均报价
    17 个竞标

    Am un web app scris in Symfony PHP (front + back) si doresc sa integrez e-factura in el prin API-ul celor de la ANAF. Practic vreau sa am un buton in aplicatie pe care cand il apesi trimite toate facturile la ANAF (fara dubluri daca sunt deja incarcate). Aplicatia este deja functionala si live de vreo 4-5 ani, avand update-uri destul de frecvent.

    $6774 (Avg Bid)
    $6774 平均报价
    16 个竞标

    I need a romanian backend developer to integrate an existing invoice/billing software (project is 4-5 years old and got updated quite often, so code is pretty clean) with the ANAF e-factura system via their API. The software is live and functioning, written in Symfony PHP (both frontend and backend). Key responsibilities: - Modify the software to send invoices via e-factura API to ANAF. Ideal skills: - Experience with API integrations or e-factura API.

    $3982 (Avg Bid)
    $3982 平均报价
    29 个竞标

    We are looking for a company which are expert in frontend and backend development to help us develop the following components: 1) Mobile App development (Android and iPhone packages): using Flutter language. 2) Backend development: using JavaScript or Python. The backend should be built as a microservice architecture to be able to handle thousands of requests per minute with ability to scale up and down and ability to have multiple databases read instance. For data storage we need your recommendation to use SQL or/and no-SQL data storage. 3) Web Console Development (Salon Console and Central Console): using HTML5/CSS/JavaScript (NodeJS) 4) Simple Website to present our service to the public: using HTML5/CSS/JavaScript (NodeJS) The design already made for all the components; PDF-exported...

    $33761 (Avg Bid)
    $33761 平均报价
    109 个竞标

    I am looking for a skilled and experienced developer who can bring my vision to life. To successfully complete this project, the freelancer will need to demonstrate the following abilities: - Experience in developing sophisticated websites with unique functionalities - Proficiency in integrating APIs for both sending and retrieving data from a third-party service Specifically applying to this project are the following functionalities that are needed: - User registration and login - Payment gateway integration - Social media sharing capabilities This project offers a great opportunity for developers to showcase their expertise in web development and API integration. A keen eye for detail and a focus on functionality effectiveness are critical for this role.

    $1222 (Avg Bid)
    $1222 平均报价
    19 个竞标

    I'm seeking an experienced mobile developer to create an Android. The core features of the app would include: - Live Classes: The app must have a feature that allows live classes, offering real-time interaction between students and instructors. - Course Purchase: A feature to purchase courses should be included, with a range of course options to choose from. - Interactive Quizzes: To ensure learning retention and make the app engaging, interactive quizzes should be readily available for students after each lesson or course. The primary target for this project are students. Therefore, the app interface should be easy-to-navigate, encouraging user-friendly and seamless interaction for learners of all ages. Ideal candidates should have a strong portfolio of similar projects, an under...

    $5719 (Avg Bid)
    $5719 平均报价
    31 个竞标

    I'm seeking a talented JavaScript full stack developer to spearhead a new, interactive web project. ### Key Responsibilities: - Create and maintain a robust, interactive web application from scratch using JavaScript - Craft a UI that is focused on interactivity and user experience ### Required Skills: - Proficient in JavaScript - Experience with creating interactive web interfaces - Strong understanding of full-stack development processes ### Ideal Candidate: You are a responsive and detail-oriented professional with a knack for delivering interactive web designs. A solid foundation in JavaScript is paramount, along with a portfolio demonstrating your ability to handle a project from concept to completion. Bring your passion for creating engaging digital experiences and let's...

    $746 (Avg Bid)
    $746 平均报价
    16 个竞标

    I'm in need of a specialist who's well-versed with Google Workspace and domain integration. The tasks involve linking our domain to both our website and Google Workspace email. We're running into issues with setting the MX values correctly and need some expert assistance. Key tasks and requirements include: - Help with connecting our domain to our Dukaan built website. - Assist in integrating our domain with Google Workspace email. - Troubleshoot and fix issues with MX values. - Must have access to the DNS settings of our domain. Ideal Skills & Experience: - Extensive knowledge and experience with Google Workspace. - Experience with Dukaan and DNS settings. - Reliable, precise, and quick problem-solving skills. We've got the tools and access, we just need your...

    $133 (Avg Bid)
    $133 平均报价
    8 个竞标
    Fantasy Football Website 3 天 left
    已验证

    I need exactly this app: But as a website and built in MERN stack. It needs to have Frontend (React), Admin dashboard (React), Backend (Node and Express) and Database (Mongodb). These screens are needed on the frontend: Loading Screen Sign in and Sign up Home Screen Contest Screen My Contest Screen My Team Screen Create New Team Screen Player Info Screen Player History Screen Player Added Screen Team Preview Screen (2 Screens) Choose Captain Screen Reminder Screen My Matches Screen (3 Screens) Winning Screen Before Match Start Screen On Going Match Screen Match Completed Screen Match Starts Screen Player Performance Screen Wallet Screen Account Screen My Profile Screen (2 Screens) Leaderboard Screen Privacy Policy Screen About Us Screen Language Screen FAQs Screen Support Screen The ...

    $4225 (Avg Bid)
    $4225 平均报价
    111 个竞标

    Como compañía de manufactura necesitamos poder automatizar y digitalizar unos de nuestros procesos, aquí detalle del proceso. Proceso. 1. Deberá recepcionar una solicitud a través de API o por carga masiva, Excel. 2. Cada solicitud deberá pasar por una aprobación de calidad. 3. Cada solicitud aprobación genera 3 tipo de etiquetas. 4. Cada solicitud aprobada genera validación a través de API a software interno para ver existencia de material. a. Si existe material para solicitud se procede a la preparación de material b. Si no existe material queda en estatus pausado y envía notificación a equipo de validación. 5. Se genera preparación de materiales con las etiquetas impresas en punto 3...

    $241231 (Avg Bid)
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    14 个竞标

    I'm seeking a skilled developer who can help create an innovative children’s learning Website aimed at enhancing creativity and imagination for young kids aged 3-10 years. The Web Site should have the following functionalities; Key Features: ● User Profile Creation: Allows users to create profiles for children, including age and interests. ● Toy Customisation Interface: A user-friendly interface for customising toy designs. ● AI Recommendations Display: Shows AI-driven toy suggestions based on the child's profile. ● Progress Tracking Dashboard: Enables tracking of child's learning progress and toy usage. ● Feedback Submission System: Users can provide feedback on toy designs and effectiveness. ● Interactive 3D Toy Preview: Offers a 3D preview of the toy designs ...

    $2034 (Avg Bid)
    $2034 平均报价
    48 个竞标

    I'm in need of a professional who's adept with C# backend, particularly in client API development. The specialist would be in charge of creating a functional HttpClient that's capable of sending HTTP requests and receiving HTTP responses. I need client from existing backend. The project explanation: I am trying to run Interactive broker Client portal api in c#. My Client will also be written in c# project should be written as Console App or Class Library (if Class Library + Tests). Gateway is easy to set up read in attachements. I tried to write my own client also tried generated client through Nswag not working at all always recieve 403 so it knows it is there but i don't have access to it even i log with real account (not paper one). Somehow in python it work (teste...

    $915 (Avg Bid)
    $915 平均报价
    15 个竞标

    Looking for NAV API Expert who can develop a model for getting Daily NAV Rate that will match with CAMS & KARVY data. Previous experience with this is a must. If you possess the necessary skills and experience in Mutual Fund NAV APIs, we would like to hear from you! Have you previously worked as a Mutual Fund NAV API Expert? Can you provide examples of projects where you developed a model for retrieving Daily NAV rates?

    $1651 (Avg Bid)
    $1651 平均报价
    3 个竞标

    I am in need of a skilled professional with proven experience in creating both websites and mobile applications. The specific purpose of these platforms has not been stated, hinting at a need for flexibility and adaptability. Key responsibilities: - A fluid and user-friendly design - Enable forms submission - Include a comments/review section - Incorporate user account creation and login Only those with demonstrable experience will be considered. Show me examples of past work where you have successfully implemented these features. Your ability to innovate and problem-solve will be critical to the success of this project.

    $2668 (Avg Bid)
    $2668 平均报价
    28 个竞标

    Necesito 100 preguntas de test psicotécnicos por cada aptitud. (700 en total) Las aptitudes son: - verbal - numérico - espacial - mecánico - perceptivo - memoria - razonamiento abstracto Se adjuntan algunos ejemplos de preguntas, toda la información respecto al proyecto se concretará por mensaje privado.

    $2958 (Avg Bid)
    $2958 平均报价
    19 个竞标
    Explicit Filtering Phase -- 2 已经结束 left
    已验证

    Explicit Filtering Phase project as discussed in chat for phrase detection and resultant redirect.

    $3677 (Avg Bid)
    $3677 平均报价
    29 个竞标

    Hello! I need someone to build this site for me, ideally if you already have experience in this industry. As a reference I can offer already finished leaked source codes. (needs to be integrated with Bitcoin payment gateway, and I don't want to redirect users, I want it to be displayed everything on my site) (I will provide Bootstrap frontend)

    $1377 (Avg Bid)
    $1377 平均报价
    10 个竞标

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