Backend Development Jobs

I'm looking for an experienced Ruby on Rails developer who can handle key backend development tasks and manage our databases. The ideal candidate for this position should have: - Expertise in Ruby on Rails: We need someone who knows Rails inside out and can deliver high-quality backend solutions efficiently. - Database Management Skills: Experience with managing databases and optimizing their performance is crucial. - Problem-solving and Communication Skills: Excellent problem-solving abilities and effective communication are essential. - Experience with Rails 5.x, 6.x, or 7.x is a plus, but not a requirement. The main focus should be on your expertise and experience in developing robust and efficient backend systems using Ruby on Rails.

I'm looking for an experienced Bubble developer to help build an application with key features. Although specific features haven't been laid out, the freelancer would need to be comfortable working with user authentication, real-time messaging, and push notifications. Ideal Skills: - Deep experience in Bubble App Development - Proven expertise with real-time messaging and user authentication - Ability to create a push notification system As details about desired aesthetics are not provided, I look for a freelancer with versatility in design ranging from modern minimalism to professional elegance. Although the project brief is still being finalized, please include your portfolio, past work, and a detailed project proposal in your application. This helps highlight your experienc...

Notes------- stay away timepass and without knowledge increase budget I am seeking a skilled freelancer to develop a comprehensive matrimonial CRM system with integrated WhatsApp communication and backend integration. The CRM should streamline lead management, communication, and data synchronization between the website backend and CRM platform. Here are the key features required: 1. Customizable pipelines for lead management and sales process tracking. 2. Dedicated hotline feature for direct communication with call logs. 3. Negative client management system to track and resolve complaints. 4. Lost client management system to capture feedback for improvement. 5. Profile sending tracking to monitor the distribution of user profiles. 6. Last interaction reminders and follow-up reminders fo...

**Purpose:** To collect data (product information, stock status, prices, etc.) in the B2B programs of 8 different suppliers. Developing software that can instantly capture data and automatically integrate this data with the user's own sales system. - **Main Features:** - Ability to securely log in to each supplier's B2B system. - Ability to instantly capture and process data. - Conversion and integration of the captured data into a format suitable for the user's system. 1. **Backend Development:** Required for system integration and data processing. 2. **Data Scraping/Web Scraping:** It is important to extract data from suppliers' B2B programs. 3. **API Development/Integration:** To securely integrate with suppliers' systems and retrieve data. 4. **Database Managem...

I'm looking for an experienced Bubble developer to help build an application with key features. Although specific features haven't been laid out, the freelancer would need to be comfortable working with user authentication, real-time messaging, and push notifications. Ideal Skills: - Deep experience in Bubble App Development - Proven expertise with real-time messaging and user authentication - Ability to create a push notification system As details about desired aesthetics are not provided, I look for a freelancer with versatility in design ranging from modern minimalism to professional elegance. Although the project brief is still being finalized, please include your portfolio, past work, and a detailed project proposal in your application. This helps highlight your experienc...

I need a system for an IoT-based project in which a WiFi module will share data to an SQL server. This needs to function within a SAAS environment with subscription per device. Main features include: - Admin and User Modules - Managed subscriptions per device - Real-time data alerts In the Admin Module, the following functionalities should be available: - User Management: Admin can manage and monitor users - Device Permissions: Admin can determine how much data a user can view - Monitor Device Data: Admin can view data from all devices - Payment Module: Ability to process transactions For the User Module, users should be able to: - View specific device data as permitted by the administrator - Receive alerts via data changes - Make payments for their subscriptions The ideal freelancer w...

Build a custodial crypto wallet using TrustWallet open source code. Requirement 1. admin panel required admin can 1. change username & password 2. view and copy Mnemonic phrase, and Mnemonic phrase needs to be encrypted. 3. soft delete and undelete 4. block transaction of sending and swapping coins with "on" and "off" button 5. set or release user as admin 2. backend code required All major coins and network should be included

Hi! I’m looking for a developer to create an easy way for me to embed on my website custom chatbots I make in Claude, OpenAI GPT/Assistants etc., and limit each user’s access. **** Summary: ***** This is my end goal: I create various types of chatbots. Most are only based on prompts I write, a few will have to reference some PDFs with ~200 pages. I want to sell access to them. Example: A customer pays $10 and gets access to talk to a certain chatbot for 20 minutes. After those 20 minutes are up, the customer has to blocked from chatting any more and be prompted to pay for another session. I will be selling access to the first chat session through another marketplace. (It must be that one, this can't be discussed.). I will set it up myself so that after they purchase...

This project is to create a (Legal Zoom) type of website with various documents starting with privatization. Individual will set up fields for a project for consumer to fill out on a particular order and there will be an admin side for each State where certain field will be changed each election by admin pertaining to the docs of that state. The starting docs will be for the state of Michigan and we will expand from there. Other work TBD.

I'm in search of a skilled full stack developer to help me build a mobile application. The project entails the following: - **Languages and Frameworks**: - Expertise in HTML/CSS, JavaScript, and Python is a must. - **Functionality Requirements**: - Incorporating user authentication and login features. - Integration with various third-party APIs. - **Audience**: - The target audience for this website is the general public. Ideal candidates should have a proven track record in full stack development and be able to deliver a secure and efficient end product.

I'm looking for an experienced Bubble developer to help build an application with key features. Although specific features haven't been laid out, the freelancer would need to be comfortable working with user authentication, real-time messaging, and push notifications. Ideal Skills: - Deep experience in Bubble App Development - Proven expertise with real-time messaging and user authentication - Ability to create a push notification system As details about desired aesthetics are not provided, I look for a freelancer with versatility in design ranging from modern minimalism to professional elegance. Although the project brief is still being finalized, please include your portfolio, past work, and a detailed project proposal in your application. This helps highlight your experienc...

I'm seeking a skilled web developer with versatility as the requirements for my project are not completely defined yet. The type of website, its features, functionality, and platform are to be discussed and decided based on the freelancer's expertise and suggestions. Key skills and experience: - Ability to design and develop different types of websites (e.g., e-commerce, portfolio, blog) - Knowledge of different features and functionalities such as online shopping carts, user registration and login, and blogging platforms - Familiarity with various platforms or Content Management Systems (CMS) such as WordPress, Shopify, and Joomla - Exceptional problem-solving skills and creativity - Excellent communication skills for understanding requirements and proposing solutions. Your i...

It needs to be compatible with Android and Web i'll provide the domain hosting. Our goal is to create a colorful, vibrant, yet professional and corporate Flutter app. The website goal is to be e commerce website for a clothing brand Key Features: - editable for product updations - User Authentication - Push Notifications - Database Integration Ideal Skills for the Job: - Fluent in Flutter framework - Experience in building apps compatible with Android and Web - Past projects showcasing a tasteful selection and implementation of vibrant and professional designs. - Proven experience with user authentication, push notifications, and database integration. If you think this project aligns with your skills and expertise, do not hesitate to place your bid. Let's create a bright, profe...

I'm looking for an experienced Bubble developer to help build an application with key features. Although specific features haven't been laid out, the freelancer would need to be comfortable working with user authentication, real-time messaging, and push notifications. Ideal Skills: - Deep experience in Bubble App Development - Proven expertise with real-time messaging and user authentication - Ability to create a push notification system As details about desired aesthetics are not provided, I look for a freelancer with versatility in design ranging from modern minimalism to professional elegance. Although the project brief is still being finalized, please include your portfolio, past work, and a detailed project proposal in your application. This helps highlight your experienc...

I am searching for an advanced level Web3 backend developer who has extensive experience working with Ethereum. The scope of the project requires the following functionalities to be integrated: - Smart contract implementation - Token creation The ideal candidate should have a strong grasp of blockchain technology, particularly Ethereum, and a proven track record of implementing smart contracts and creating tokens. They need to maintain the highest level of quality, accuracy, and security in their work. Advanced skill set in backend development is a must.

I am on the lookout for an experienced and innovative programmer who can assist in creating a unique search engine from scratch. The specific programming language is open as the user did not specify a preference, so proficiency in Python, Java, or C++ will be a plus. Though the user has not provided insights into the specific features desired for this project, common elements of search engines include web crawling, indexing, and ranking algorithms. Your familiarity with these or willingness to research and incorporate them will be essential to your success in this project. The user did not specifically state the purpose of the search engine, however it could be for personal, business, or educational use. Balancing these needs could be a crucial part of the project. Skills and Experience ...

I'm looking for a TypeScript expert to build a SaaS model comprised of small micro-services within windmill.dev. The goal is to handle incoming data from Instagram and automatically respond using chatgpt. Key tasks will include: - Writing clean, optimized TypeScript code - Debugging and fixing any errors that may arise - Implementing complex algorithms to process data accurately and quickly In terms of functionality, the application should be able to: - Monitor Instagram messages and comments in real-time - Set up a webhook to receive Instagram data - Reply automatically to the messages received using OpenAI Assistant Ideal skills and experience for this project include: - Proficiency in TypeScript and SaaS architecture - Experience integrating with Instagram's API - Familia...

If you are bidding on this project you will need to register at and watch our presentation so that you can understand the full scope of our project. Inside the presentation there is an animated segment on our marketing video that you must pay special attention to. Please mention the name of the main character in the explainer video so I know you watched it. Bids that failure to register and mention the character’s name will receive no reply. I am looking to build an automotive marketplace app that will have a range of features to make it user-friendly for both buyers and sellers. Key Features: - User registration and login, Search functionality, Listing creation and management - 24-7 Ai agents support, API integrations from multiple service providers - In app purchases, C...

*************IMPORTANT*********** Please start with your bid by writing your personal Github profile first, we won't check bid without Github profile. ************************************ I'm in need of a talented developer, preferably with a strong background in producing business applications. Here's what I'm looking for: - Expertise: You should be skillful in any of Javascript, Python, Java / Kotlin or Swift / Objective C, Flutter / React Native / Xamarin. - Platforms: Production of a cross-platform app that runs smoothly on both iOS and Android is essential. - Experience: Evidence of previous projects in business app development would ideally be shown. By applying these requirements, you will help to create an app that can contribute to the success of my busi...

It is basically an app that helps the sales see the account profile data that is attached. We already have the designs ready, workflow will be decided in collaboration with the freelancer. Expertise required is app development and not design

Notes----- Please stay away from those who first say something else in the budget and then increase it. We are looking for a skilled Flutter developer and PHP backend developer to make updates to our existing matrimonial app and integrate new functionality using APIs Implementing new functionalities on the server-side to support app updates. Enhancing database structure for improved data management and efficiency. Improving security measures to safeguard user data and privacy UI enhancements and improvements for a better user experience. Integration of new screens and features as per requirements. Optimizing app performance and responsiveness across different device

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

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)