We're looking for an experienced Full Stack Developer with strong backend skills to help complete a small milestone in our logistics management portal. This is a trial project focused on backend development and API integration. If the collaboration goes well, we'll have additional milestones available. Key Tasks & Responsibilities - Build 2–3 REST APIs for shipment management. - Connect the APIs to the existing React frontend. - Fix a few backend/API-related bugs. - Ensure the new endpoints are properly tested. Requirements - Strong experience with Node.js and Express. - Experience building REST APIs. - PostgreSQL experience. - Ability to quickly understand and work within an existing codebase. - Good communication and clean coding practices. If everything goes well, we'll continue with additional milestones covering new features, optimizations, and ongoing backend development.

We're looking for an experienced Full Stack Developer with strong backend skills to help complete a small milestone in our logistics management portal. This is a trial project focused on backend development and API integration. If the collaboration goes well, we'll have additional milestones available. Key Tasks & Responsibilities - Build 2–3 REST APIs for shipment management. - Connect the APIs to the existing React frontend. - Fix a few backend/API-related bugs. - Ensure the new endpoints are properly tested. Requirements - Strong experience with Node.js and Express. - Experience building REST APIs. - PostgreSQL experience. - Ability to quickly understand and work within an existing codebase. - Good communication and clean coding practices. If everything goes well, we'll continue with additional milestones covering new features, optimizations, and ongoing backend development.

we are making a SAAS app and we are looking for someone with major experience who has done this type of work before and who can work as a consultant for us - We want to make an app for a nieche market of less than 1000 companies - more details will be provided if you send your portoflio - we plan to fully develop the app in 6 months.

We are looking for a Back-End Developer to lead the development of back-end services that enhance enterprise security, streamline identity management, and ensure secure access throughout the organization. In this crucial role, you will be responsible for designing and implementing systems that authenticate users, manage user permissions, safeguard sensitive business information, and facilitate secure communication between various internal applications and enterprise platforms. This position differs from traditional back-end roles, which typically focus primarily on business logic and data processing. Instead, this role emphasizes the creation of a highly secure back-end infrastructure that protects organizational resources while delivering reliable, scalable authentication and authorization services to meet our enterprise's complex needs. Your contributions will directly impact compliance initiatives, strengthen cybersecurity efforts, and enhance the protection of mission-critical business systems. As an ideal candidate, you will enjoy tackling intricate security challenges, designing distributed back-end architectures, and developing resilient infrastructures to effectively defend our enterprise against emerging threats. In this role, you will closely collaborate with cross-functional teams, including front-end developers, security experts, and system architects, to ensure that security considerations are integrated into every aspect of the development process. Additionally, you will be expected to stay updated with the latest trends in cybersecurity and back-end technologies, contributing innovative solutions that align with industry best practices. The following are the required skills and qualifications for this position: - Strong experience with one or more of the following programming languages: Java, Kotlin, C#, Node.js, Go, or Python. - Experience in designing secure RESTful APIs and distributed back-end services. - Knowledge of authentication frameworks, including OAuth 2.0, OpenID Connect, and JWT. - Experience working with both relational and NoSQL databases. - A solid understanding of back-end security principles and secure coding practices. - Familiarity with Docker, Kubernetes, or cloud-native back-end deployments. - Excellent analytical and problem-solving skills.

We are looking for a Back-End Developer to design, develop, and maintain reliable server-side systems that support our business applications, automate operational processes, and facilitate secure communication between internal and external platforms. In this role, you will create and manage server-side applications and services that deliver the functionality, business logic, and data-processing capabilities needed for our digital platforms. Your responsibilities will include developing RESTful APIs, backend services, database interactions, authentication integrations, data-processing components, scheduled jobs, and application services that enable reliable communication between frontend applications and other systems. You will translate functional requirements into efficient backend implementations while taking into account performance, security, scalability, maintainability, and reliability. Specific tasks will include designing API endpoints, implementing business rules, validating incoming data, managing application state, handling errors, optimizing database queries, and developing reusable backend components. You will work with both relational and NoSQL databases to create suitable data structures, improve query performance, maintain data integrity, and support applications that handle increasing volumes of organizational information. Additionally, you will contribute to backend architecture decisions regarding service boundaries, API design, database structures, caching, asynchronous processing, background jobs, integration patterns, and cloud-based deployment strategies. The skills required for this position are outlined below: - Experience in developing backend applications or server-side services. - Strong knowledge of at least one backend programming language, such as Python, Node.js/JavaScript, Java, C#, Go, or PHP. - Experience in creating and using RESTful APIs. - Understanding of relational databases and SQL. - Familiarity with backend application architecture and software development principles. - Knowledge of authentication, authorization, data validation, and secure coding practices. - Experience with Git or another version control system. - Ability to troubleshoot backend issues and identify their root causes. - Understanding of testing practices for backend applications. - Ability to interpret technical requirements and translate them into effective solutions. - Strong communication skills and the ability to collaborate with both technical and non-technical stakeholders.

Description: I’ve built an MVP for a product builder—an app that lets users create websites, apps, and AI-powered products interactively. I used Lovable to generate the initial front end, which is about 30-40% complete. Now, I need a skilled developer to take the project further—expanding the back end, integrating interactivity, and making it more like Polsia in terms of task-driven creation. What I need: Integrate or build the back-end logic (potentially serverless or cloud functions). Enhance interactivity so users can create tasks and see the process, similar to Polsia. Ability to work with or refactor the code generated by Lovable.

Project: web platform bringing together people business and capital Engagement: can be hourly or fixed‑price for MVP build, via Upwork Location: DFW area of Texas, US. Scope of Work (initial/brief): design technical architecture for a web app (front‑end, back‑end, database, basic admin tools). Implement core MVP features: user registration/login, profile creation and editing, search/filter UI, connection requests etc. Set up hosting/deployment, security best practices, and a structure that can scale to more users and features over time. Periodically provide documentation and a maintainable codebase that supports future iterations. Tech Stack (flexible): Front‑end: React, Vue, or similar modern JS framework. Back‑end: Node.js, Python (Django/FastAPI), or similar. Database: PostgreSQL or other relational DB. Hosting: AWS, GCP, Azure, or comparable cloud provider. Compensation & Requirements: business plan, monetization strategy, and legal structure will be shared once we have mutual interest and an NDA in place. Equity and partnership terms will be discussed after NDA is signed and subject to a separate written agreement.

We’re looking for an experienced Full-Stack Developer to build and refine a modern, responsive web application. You should be comfortable owning both the front end and back end, working independently, and turning clear requirements into a polished, reliable product. What You’ll Do Build and maintain the web application from front end to back end Create a clean, fast, mobile-responsive UI Develop backend functionality, APIs, and database integrations Implement user authentication and account functionality Integrate third-party APIs/services as needed Test, debug, and optimize performance Deploy and maintain the production application What We’re Looking For Strong full-stack web development experience Excellent JavaScript/TypeScript skills Experience with modern frameworks such as React/Next.js Strong backend and database experience Experience with APIs, authentication, cloud deployment, and Git Ability to write clean, scalable, well-documented code Strong communication and ability to work independently Important: We want a developer who can think through problems and recommend solutions—not someone who simply waits for step-by-step instructions. When applying, please send 2–3 examples of web apps you personally built, briefly explain your role in each, and include your availability and hourly rate.

We are seeking a Full-Stack Mobile App Developer to create a cross-platform mobile app (iOS & Android) that connects to our existing commercial real estate platform. The app should enhance user engagement and provide a seamless experience for property seekers. The ideal candidate will have experience in both front-end and back-end development, ensuring a smooth integration with our existing system.

Looking for an in-person location scout in Los Angeles, California, with a focus on downtown L.A., to photograph real estate. Looking for photographs of very specific façade structures. Must be able to take clean, centered, high-quality photographs. Report back and pin on map with the locations of the buildings, and report back by end of day. Must be very familiar with Los Angeles and with a focus on downtown. Must be able to attend a Creative Kickoff Zoom call to review and go over instructions.