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.

De 144,585 opiniones, los clientes califican nuestro Backend Developers 4.85 de un total de 5 estrellas.
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    24 trabajados encontrados, precios en USD

    SÓLO LATINOAMERICA Este es un proyecto simple donde se buscan tres cosas: 1. Generar una REST API donde la mayoría de endpoints son de lectura y unos pocos de escritura. Sin autenticación 2. Se integre con la API de Google para obtener las coordenadas a partir de una dirección 3. Modificar el admin para cargar información a partir de un Excel. Somos una empresa de desarrollo de software (puedes revisar nuestro perfil acá en Freelancer.com) por lo que si todo sale bien, este no sería el único proyecto. Si eres un crack en Django y Django Rest Framework, tendremos mucho trabajo ?. Condiciones de trabajo: 1. Se hará una pequeña prueba técnica para validar que tienes las habilidades que buscamos 2. Trabajar de l...

    $502 (Avg Bid)
    $502 Oferta promedio
    68 ofertas
    Jr. Full Stack Developer 6 días left
    VERIFICADO

    Below is the job description for the Junior Full-Stack Developer position we are looking to fill: Proficiency in Programming Languages: Must be skilled in Node.js, Java, ReactJS, and Docker. Frontend Development: Should have extensive experience with TypeScript/JavaScript and be adept in modern frameworks like React. Backend Expertise: A deep understanding of the Spring Boot framework is crucial. Database Knowledge: Experience with database systems such as PostgreSQL and DynamoDB is required. API Development: Demonstrated ability in developing applications with REST API and GraphQL backends. DevOps Skills: Capable of designing and implementing CI/CD pipelines. Cloud Expertise: Knowledge of AWS cloud services and architecture is essential. Problem-Solving: Must possess excellent ana...

    $697 (Avg Bid)
    $697 Oferta promedio
    8 ofertas

    Build a simple 3-screen website Admin able to add Users Users Login and enter Trading Partner Information or Search the Existing Trading Partners Users can download the Trading Partners to SpreadSheet 4 Tables Ability to search and download I am open to using any technology that would improve the GUI and the ability to download the partner Information. Able to take any hosting site like Godaddy, HostGator, or any other site. Need it ASAP. Will be able to test and provide feedback very quickly PLEASE DON'T JUST BID WITHOUT READING - ASK YOUR QUESTIONS.

    $150 - $650
    Sellado
    $150 - $650
    40 ofertas

    I'm seeking a skilled AI developer to create a cutting-edge Large Language Model (LLM) that can handle a wide range of text-to-text tasks. This model should be built from the ground up, using my provided dataset as the foundation. Key Requirements: - Creation of a Large Language Model: The core functionality of this AI model should be the ability to interpret and generate varied text inputs, in all languages. - Versatile Text-to-Text Tasks: The model should be equipped to handle diverse text-to-text tasks - from language translation to text summarization and chatbot responses. Ideal Candidate: - Extensive AI Development Experience: As the project demands the creation of a sophisticated LLM, prior experience in developing advanced AI models is essential. - Proficiency in Natural Lan...

    $7219 (Avg Bid)
    $7219 Oferta promedio
    48 ofertas

    I'm seeking an experienced developer to aid in building 15+ AIs for a backend project using NestJS. The main focus is API development, with a particular emphasis on REST APIs. Key Responsibilities: - Create efficient and secure REST APIs - Integrate Payment Gateways, Social Media Platforms, and Cloud Storage Services via these REST APIs - Ensure a robust level of user authentication and authorization Ideal Skills and Experience: - Proficient in NestJS and AI technology - Extensive experience in REST APIs, including third-party integrations - Strong understanding of data storage, retrieval, and security practices.

    $15 / hr (Avg Bid)
    $15 / hr Oferta promedio
    41 ofertas

    I’m seeking a full stack web developer with proficiency in HTML, CSS, JavaScript, Python, Ruby, PHP, Node.js, and React to create a comprehensive hotel booking website. The primary aim of this project is to offer a user-friendly and efficient space for users to book hotels while enjoying a smooth and seamless experience. Features desired include: - Search functionality to enable effortless hotel discovery - Booking management to track and manage users' bookings - Incorporation of customer reviews to enhance customer confidence and choices - Integration of online payment solutions for smooth financial transactions - A Room availability calendar for easy checking of room availability - Multi-language support to cater to a global audience - A chat bot for 24/7 customer sup...

    $1357 (Avg Bid)
    $1357 Oferta promedio
    52 ofertas
    Social Media App 4 días left

    I'm looking for a seasoned app developer to create a mobile application that functions similar to Instagram. The app should be compatible with both Android and iOS systems. Key features of the project should include: - Video sharing capabilities - Creation of user profiles - Various filters and editing tools for enhanced media uploading experience - Seamless social media integration for easy login and registration and Data fetching As for the user interactions, I'd like a direct messaging system for the users to communicate and an option for them to save their favorite posts. People should also be able to view posts they've liked in the past. The ideal person for this job should have extensive experience in mobile app development, particularly with social media applicat...

    $2919 (Avg Bid)
    $2919 Oferta promedio
    156 ofertas
    Low-Code Developers Wanted 3 días left
    VERIFICADO

    We are need of developers proficient in low-code platforms to create a suite of applications. Firstly, we will need a web application, a mobile application, and an enterprise application developed. These are crucial tools for our business operations and customer interactions. In terms of functionalities, I require the following: - User authentication: The applications should have a secure login system. - Data storage and retrieval: The ability to store data and retrieve it when needed. - Integration with third-party APIs: Seamless integration with external APIs is a must. I'm expecting a relatively small user base initially, but these applications should be scalable and able to handle growth. Ideal candidates would have: - A strong background in low-code development - Experience ...

    $14 / hr (Avg Bid)
    $14 / hr Oferta promedio
    72 ofertas
    Events Website Structure 3 días left
    VERIFICADO

    I'm looking for an experienced web developer to help me build the structure of my events website. Here's what I need: -Website: The primary purpose of the website is to display upcoming and past events and have users to register / subscribe for newsletter - Admin Backend: To add / remove / manage events, see subscribers, compose and send newsletter to subscribers Development language and hosting platform is flexible

    $377 (Avg Bid)
    $377 Oferta promedio
    297 ofertas

    A company operates as an innovative platform offering users the opportunity to earn money by sharing their opinions in surveys. Through a token-based payment system, users acquire token packages and receive appreciation of these assets when responding to surveys available on the platform. Additionally, the system offers a referral program where users can share their referral link and earn commissions when new users sign up through this link. This revolutionary business model aims to make the process of participating in opinion surveys more accessible and profitable for users. 1. Interface do Usuário (Frontend): Development of an intuitive and responsive interface for the overall administrative system and user back office. The overall administrative system should include pages for ...

    $2338 (Avg Bid)
    $2338 Oferta promedio
    44 ofertas

    I'm looking for a skilled PHP developer to help me with my modern and sleek jewellery site. Key Requirements: - Product Catalog & Search: The website should have a robust catalog for displaying all our jewellery items. Customers should be able to search for items based on various filters such as price, category, and more. - Shopping Cart & Checkout: A seamless shopping experience is crucial. The shopping cart should be user-friendly and the checkout process should be simple and secure. - User Registration & Login: To enhance user experience, the site should allow users to create accounts, log in, and manage their profiles. This is essential for tracking orders, providing personalized recommendations, and more. Ideal Skills & Experience: - Proficiency in PHP developm...

    $273 (Avg Bid)
    $273 Oferta promedio
    60 ofertas

    I am seeking an experienced developer to build an informational web project with an integrated machine learning model. Key Features: - Capability for users to upload images to be processed and recognized by the model - Implement Image Recognition as the preferred machine learning model type. Proven experience in machine learning, particularly Image Recognition, and web development is a must. Your expertise should include building and managing user-friendly web platforms that can handle high volume image uploads, processing, and cataloging. Your responsibilities will also encompass integrating the Image Recognition model onto the platform seamlessly. This project is detail-oriented and requires a developer who can create a robust, secure, and user-friendly interface that successfully ...

    $141 (Avg Bid)
    $141 Oferta promedio
    11 ofertas

    I am seeking a developer to create an in-depth offline property abbreviation dictionary portal, accessible as a desktop or mobile application, allowing users to easily search and access property-related abbreviations and their full meanings without requiring an internet connection." Key requirements: ▪︎ The website should provide comprehensive word definitions ▪︎ Include abbreviations and provide their full definitions ▪︎ Both word definitions and abbreviations must be thoroughly explained Ideal Skills: ▪︎ Proficiency in website development ▪︎ Experience in creating educational resources or similar platforms ▪︎ Excellent command of the English language ▪︎ Attention to detail, ensuring accuracy and completeness of every word definition and abbreviation. Through this platform, I ...

    $629 (Avg Bid)
    $629 Oferta promedio
    91 ofertas

    I require assistance to set up a cronjob using Django cron-tab for my professional project. The main purpose is to automate tasks, specifically to - Send scheduled, automated reminder notifications to our clients. Ideal Skills and Experience: - Expertise in Django and cron-tab - Experience in setting up automated scheduled notifications - Knowledge on programming for customer interaction. Need simply a person to help me with enabling already set-up cronjob in my Django project(professional work).

    $87 (Avg Bid)
    $87 Oferta promedio
    17 ofertas

    We are seeking a skilled developer to create a versatile widget that integrates seamlessly with Web3 dashboards on the Neo Blockchain (). Dashboards are only in development. The goal would be to create a widget to be posted publicly to allow others to easily integrate the widget into their developing and/or exiting dashboard. This widget will be responsible for registering wallet addresses with Neo Name Service () usernames. The successful implementation must be compatible with multiple programming languages including JavaScript and Python. Experience with blockchain technology and familiarity with Neo N3/Neo Name Service is a bonus. Although familiarity with any frameworks was not specified, being agile and adaptable will be crucial in successfully delivering this project. Key Requirem...

    $189 (Avg Bid)
    $189 Oferta promedio
    34 ofertas
    Website improvement 2 días left
    VERIFICADO

    The site was created on WordPress * Set up link personalization so that by clicking on a link sent from the site, the page opens only to the user to whom it was sent. If clicking on the link will enter the login information of another user, in this case it should not proceed. Configure the correct redirect to the necessary sites * insert a link to a document for download on one of the site pages (this document has already been generated and there is a download link on another page of the site) * Add generation of an invoice for using the site in pdf form (the form will be provided) with saving on the pages in the admin panel and on the user page. * Edit the account pages created in the admin panel, add a filter by user, month, account status and account number (these fields have been c...

    $107 (Avg Bid)
    $107 Oferta promedio
    96 ofertas

    I'm in need of a blockchain specialist to create a smart contract for my unique security token. - Specifics: Primarily, the smart contract should center around token creation. - Purpose: This token is going to be a security token, so it's crucial that the smart contract is coded to ensure it meets all the necessary regulatory and security standards. Ideal Skillset: - Extensive experience in blockchain technology - Proficiency in smart contract development - In-depth understanding of token creation - Specialization in security token development is a plus - Knowledge of relevant blockchain coding languages (e.g. Solidity)

    $11630 (Avg Bid)
    $11630 Oferta promedio
    19 ofertas
    Decode data Json 2 días left

    saya membutuhkan partner backend untuk mendecode data json

    $151 (Avg Bid)
    $151 Oferta promedio
    12 ofertas

    I have a music website and I want you to optimize the website for SEO and build the website's backlink (good and effective backlink) the website is you can look it up and give me a short proposal from 7 days to 3 months. Also show me other websites you have done the same for in the past and evidence that show you did the job ( not more than 3 months please).

    $48 (Avg Bid)
    $48 Oferta promedio
    71 ofertas

    Currently, we're in need of a specialist to come in and assist us with some unspecified issues plaguing our website. Our ideal candidate is a freelancer with a strong background in both front and backend development. Key Requirements: - Carryout a comprehensive audit to identify and understand issues - Fix identified issues that maybe causing broken links or error messages - Ensure optimal website performance While we appreciate freelancers with examples of past work and effective project proposals, what's most important to us is your experience. More specifically, we are seeking someone with notable experience in database optimization. This will be vital to ensuring our website runs efficiently and effectively. If you meet these qualifications, we'd love to hear from ...

    $37 (Avg Bid)
    $37 Oferta promedio
    17 ofertas
    PHP Developer 18 horas left
    VERIFICADO

    We are looking for a PHP Developer to join our team of technical consultants. You would be involved in solving problems and providing daily support. The task is primarily based on: 1. Development, enhancement, maintenance 2. Symfony framework If you think you are the right candidate for this position, please submit a proposal describing how you can help with this project.

    $14 / hr (Avg Bid)
    $14 / hr Oferta promedio
    43 ofertas

    cần freelancer phát triển front end và back end cho ứng dụng di động Saas

    $1032 (Avg Bid)
    $1032 Oferta promedio
    37 ofertas
    Explicit Filtering Phase -- 2 Finalizado left
    VERIFICADO

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

    $470 (Avg Bid)
    $470 Oferta promedio
    29 ofertas

    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)

    $176 (Avg Bid)
    $176 Oferta promedio
    10 ofertas

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