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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    22 jobs found, pricing in AUD

    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.

    $757 (Avg Bid)
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    16 bids

    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...

    $6638 (Avg Bid)
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    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.

    $165 (Avg Bid)
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    16 bids

    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...

    $1152 (Avg Bid)
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    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...

    $143 (Avg Bid)
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    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...

    $23 (Avg Bid)
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    5 bids

    This is a very small project, can be a simple backend with 1 login and password The fields needed are the following year ( Text Box ) Name of client or Company ( Text Box ) Type: Individual or Company ( Dropbox choosing Individual or Company ) Date Received ( Date Field ) Date Submitted ( Date Field ) Copy given to client ( Date Field ) Search Feature with 2 options showing Individuals or Company Print Feature showing Print List all Individuals / All Companies Also option to Print only 1 Individual or 1 Company Need to be able to Update the records aswell I will prefer a popup window to add the records and for Update aswell A Dashboard can be added aswell to show # of Individuals, # of Companies, # of Income tax Submitred, # of Profit Tax Submitted, This can be done in PHP, Laravel...

    $233 (Avg Bid)
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    82 bids
    Fantasy Football Website 5 days left
    VERIFIED

    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 ...

    $818 (Avg Bid)
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    108 bids

    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 ...

    $400 (Avg Bid)
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    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...

    $172 (Avg Bid)
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    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?

    $299 (Avg Bid)
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    2 bids

    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.

    $522 (Avg Bid)
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    27 bids

    More details: I have deploy ML inference code on uvicorn FastAPI server. When I run request sequentially or send 2-3 concurrent request then I get very low response time but when I increase to higher concurrency it increases exponentially. Want to debug this problem and fix it. I wont be able to provide you code to run on your system. I will share my screen and can any experiment as you suggest Which programming language is the ML app currently written in? Python What type of machine learning model does the app utilize? FastAPI Does the app require real-time predictions or batch processing? Real-time predictions

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    TBS Casting ( Interlink Project): About the Project: TBS Casting (Interlink Project): Interlink is a platform connecting professionals in the media and film industry with employers. It aims to bridge the gap between talented individuals and producers, offering a reliable and secure platform for communication and service delivery. The project objectives include connecting professionals with employers, providing a variety of services, and supporting professional skills development. The target groups consist of professionals (actors, models, voice actors, directors, content writers, and others) and service seekers (entrepreneurs, project managers, company directors, service agents, shopping agents, media production companies, and referral partners). Key features include professional and se...

    $2288 - $4577
    Sealed
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    Are you a talented developer with expertise in Golang, Java, or PHP? We are looking for someone experienced in team development using Github and who has a great coding style to join our team! The project is for a soccer betting site. We already have some team strength, so we need a Golang and Java developer with team development experience who can work with the team ? Requirements: - Proficiency in Golang, Java, or PHP - Strong experience in team development using Github - Demonstrable coding skills with a great coding style ? Responsibilities: - Develop and maintain backend services - Collaborate with team members on coding best practices - Ensure code quality through code reviews and testing If you are passionate about backend development and meet the above requirements, I'd lo...

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    Looking for a skilled freelancer who can provide a dynamic PDF report creation service for my posts on Oxygen. The requirements are as follows: - Capability to generate PDF reports that include either all posts or only selected ones - The posts should contain images, ensuring a comprehensive representation of content - Flexibility in layout design is a must. The report output should coincide with my custom layout preference Ideal candidates will have prior experience in creating such PDF reports and possess a keen understanding of layout design for maximum reader engagement. High attention to detail and the ability to work within a set deadline is expected. Passionate web professionals who are adaptable and keen to realize unique requirements, please apply.

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    More details: What are the key features you would like the payin and payout software to have? Automated payment processing, Real-time transaction monitoring, Integration with multiple gaming platforms What are the preferred payment methods you would like the software to support? Credit/Debit cards, Upi Do you have any specific security requirements for the software? Encryption of sensitive data

    $2108 (Avg Bid)
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    As the project manager of an initiative that is presently incomplete, I am in dire need of professional support. Key Responsibilities: - Provide additional workforce to assist with the current project - Primarily focus on code standardization and cleanup Ideal Candidate: For this role, a background in advanced coding and the ability to identify and correct nonconforming areas is crucial. The ideal candidate will have a proven track record of effectively cleaning and standardizing code to enhance project completion. Proficiency in code quality assurance, debugging, and code optimization are essential skills. Proactive communication and timely delivery are also vital for success in this project.

    $21 (Avg Bid)
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    Explicit Filtering Phase project as discussed in chat for phrase detection and resultant redirect.

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    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)

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    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...

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    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.

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