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Backend Development (Phase 1) - General context 1) Web-based platform focused on the end-to-end digitalization of operational processes involving assets, users, and recurring workflows. 2) Initial scope targets individual end users and small-scale use cases, not enterprise deployments. 3) Early-stage project with internally defined functional flows. High-level functional scope 1) Management of core entities (assets, users, and contractual or relational objects). 2) Lifecycle and state management for those entities. 3) Tracking of transactions, events, and status changes. 4) Incident and task management linked to assets and users. 5) User communications and notification system. 6) Architecture designed to allow additional functional modules in later phases. Technical scope – Phase 1 1) Development of the backend for the web platform (MVP). 2) Definition of a backend architecture oriented toward scalability and future evolution. 3) API exposure for consumption by a web frontend and a future mobile application. 4) User authentication and authorization. 5) Integration with standard third-party services: a) Payment gateways. b) Messaging and notification services. c) Identity verification and digital signature services (optional for MVP). 6) Logging, error handling, and baseline security best practices. Preferred technologies (not exclusive) 1) Backend: Node.js and/or Python. 2) Modular or microservices-based architecture. 3) Relational database (PostgreSQL or equivalent). 4) Cloud infrastructure (AWS, GCP, or similar). 5) Use of widely adopted third-party services for payments, communications, and identity. What we are requesting - Cost estimation for: a) Backend MVP development. b) A technical foundation prepared for functional and technical scaling. - Estimated delivery timeline. - Assumptions included in the proposal (in scope / out of scope). - Proposed engagement model (individual freelancer or small team). - Examples of relevant experience or comparable projects (high-level only).
Project ID: 40207789
145 proposals
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Active 18 days ago
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145 freelancers are bidding on average €2,024 EUR for this job

With over a decade of experience in web and mobile development, specializing in backend solutions, I understand your need for a scalable, user-centric platform for digitalizing operational processes. Your project’s focus on managing core entities, tracking transactions, and user communications aligns perfectly with my expertise. In the realm of fintech and healthcare solutions, I have successfully delivered projects like yours, ensuring efficient lifecycle management and robust user authentication. My experience in blockchain integration can also provide innovative solutions for your project’s future evolution. Let’s collaborate to bring your vision to life. Feel free to reach out to discuss your project further and how we can work together to achieve your goals.
€2,400 EUR in 30 days
9.1
9.1

With my expertise in PHP, Python, Website Design, UML Design, and HTML, I am well-equipped to handle the backend development for your project. I am confident in my ability to create a scalable architecture and integrate necessary third-party services. The budget can be adjusted after discussing the full scope, and I am committed to working within your constraints. Please review my 15-year-old profile to see my extensive experience. Let's discuss the details, and I am eager to showcase my dedication by starting work immediately.
€2,100 EUR in 21 days
8.8
8.8

Hello, I came across your project and found it truly interesting. With over eight years of hands-on experience in this field, I have successfully delivered high-quality solutions to clients worldwide. My dedication to excellence is reflected in the 180+ positive reviews from satisfied clients. I’d love to bring this expertise to your project and ensure outstanding results. However, I do have a few important points I’d like to clarify to align perfectly with your vision. Let’s connect via chat, where I can also share relevant examples of my past work. I'm looking forward to hearing back from you! Best Regards, Divu.
€2,250 EUR in 7 days
8.3
8.3

As an experienced and versatile backend developer with over 8+ years of hands-on experience in web-based systems, I am confident in my ability to deliver exceptional results for your project. Having successfully integrated various third-party API's like Shipstation, Quickbook, Salesforce, Amazon, and more, I am well-versed in the intricacies of managing assets, users, transactions, and incidents - skills essential to your contextualized digital operational system. My proficiency in using Node.js and Python makes me adept at building a scalable and evolutionary backend architecture for your project such as the one you require during this initial phase. With working knowledge of relational databases like PostgreSQL, cloud infrastructures like AWS and GCP plus applicable third-party services for payments, communications, and identity signifies that your preferred technical aspects are within my specialization. I take pride in providing meticulous work that abide by strict timelines. My approach is always aligned with the client's requirements and delivering top-quality work is non-negotiable. By choosing me or my small team for your engagement model I believe we can form a long-lasting business relationship that will exceed your expectations. I eagerly anticipate the opportunity to share few high-level examples of previous projects as well as provide an estimat
€2,000 EUR in 25 days
8.3
8.3

Hi, What specific functionalities do you envision for the backend MVP? Knowing your requirements can help me provide an accurate cost estimate and timeline. I have extensive experience in backend development, particularly using Node.js and Python, and have successfully built scalable architectures. My previous projects have involved implementing user authentication, payment integrations, and API exposure for web and mobile applications. I’m familiar with PostgreSQL and cloud platforms like AWS, ensuring best practices in security and error handling. Based on your scope, I can provide a proposal that outlines a solid technical foundation, including key assumptions and a proposed engagement model. I look forward to helping bring your project to fruition! Best Regards, Badar Madni
€1,900 EUR in 45 days
7.6
7.6

I HAVE READ YOUR REQUIREMENTS CAREFULLY AND UNDERSTAND THE FULL SCOPE OF THE BACKEND MVP AND ITS FUTURE SCALABILITY GOALS. I have 10+ years of experience building backend platforms using Node.js and Python, with strong expertise in PostgreSQL, API-driven architectures, authentication/authorization, lifecycle management, and event-based systems. For this project, I would design a modular, cloud-ready backend (AWS or GCP) exposing secure APIs for web and future mobile clients, covering asset/user management, state transitions, transactions, incidents, tasks, and notifications. Phase 1 would focus on a clean, extensible MVP with logging, error handling, and integrations for payments and messaging, while laying a solid foundation for additional modules in later phases. I typically deliver an MVP of this scope in 8–10 weeks, depending on final feature depth, and I work as an individual developer with full ownership and continuity. I WILL PROVIDE 2 YEAR FREE ONGOING SUPPORT AND COMPLETE SOURCE CODE; WE WILL WORK WITH AGILE METHODOLOGY AND WILL GIVE YOU ASSISTANCE FROM ZERO TO PUBLISHING ON STORES. I am confident my experience aligns well with your early-stage platform vision and technical needs. I eagerly await your positive response. Thanks.
€1,500 EUR in 7 days
7.7
7.7

Hello, HAVE HANDS-ON EXPERIENCE WITH SUCH PROJECT I have 9+ years of proven experience building scalable backends with Node.js/Python and cloud-native architectures, and I clearly understand the requirements for an MVP designed to evolve safely over time. The goal is to deliver a secure, modular backend that manages assets, users, workflows, and events while remaining flexible for future functional expansion. -->> Entity lifecycle & state management (assets, users, relations) -->> Secure auth & role-based access control -->> Transaction, incident, and task tracking APIs -->> Payments, notifications, and third-party service integrations My approach is clean, modular architecture, strong API contracts, baseline security, and an agile workflow focused on scalability. In chat, I have a few technical questions to confirm scope assumptions and timelines before proceeding further. Thanks & regards Julian
€1,500 EUR in 7 days
8.1
8.1

Hello, "As a team who has successfully executed multiple complex projects, we are confident that choosing Live Experts for your project would be a decision you won't regret. With our expertise ranging from backend development to software design, we can offer you guidance and deliverables that align with your specific goals and requirements. In terms of backend development, we have ample experience working with both Node.js and Python, the preferred technologies mentioned in the project description. We understand the importance of a scalable architecture that can accommodate future growth and this will be at the forefront of our strategy. Our involvement in API exposure for both web frontends and mobile applications ensures that your platform will have an inclusive approach. Additionally, our familiarity with cloud infrastructures like AWS and GCP complements the vision you've laid out. Furthermore, what separates us from the crowd is not just our expert skills, but also our genuine commitment to client satisfaction. Throughout your project journey, from cost estimation, provision of a technical foundation prepared for functional and technical scaling, adherence to agreed timelines to clear communication in assumptions and offer of engagement model as an individual freelancer or small team - you can expect nothing less than what's best for your project. So, let's discuss your project at your convenience!" Thanks!
€3,000 EUR in 1 day
7.4
7.4

Hi, We’ve developed several MVPs with scalable backends using Node.js and Python, including a product that integrated with multiple third-party services for payments, notifications, and more. We also have extensive experience with AWS and Azure, managing CI/CD pipelines and server configurations. For your project, we can start with a dedicated backend developer and add more resources as needed, ensuring you get the right expertise at the right time. Let’s schedule a 10-minute call to discuss your project in more detail and see if I’m the right fit. I usually respond within 10 minutes. Best regards, Adil
€2,475 EUR in 21 days
7.3
7.3

Hi I can design and build your backend MVP using a scalable Node.js/Python architecture with PostgreSQL, focusing on clean entity management, lifecycle logic, event tracking, and secure authentication/authorization. The key technical challenge is creating a modular foundation that supports assets, users, workflows, payments, messaging, and later identity verification—all without locking you into enterprise overhead too early. I’ll address this by structuring a clear service layer, REST API exposure, and integration points for payment gateways, notifications, and future mobile-client consumption. Baselines such as logging, error handling, and security will be embedded from day one to ensure smooth evolution into later phases. I can also provide cost estimation, timeline ranges, key assumptions, an engagement model, and high-level examples of similar backend builds involving lifecycle/event systems. You’ll receive a foundation designed intentionally for future modules so scaling becomes additive, not disruptive. Thanks, Hercules
€3,000 EUR in 15 days
7.1
7.1

Hi there, I’ve reviewed your Backend Development (Phase 1) brief and I’m confident I can deliver a solid MVP backend with a scalable foundation for future modules. My approach centers on a modular, microservices-oriented backend using Node.js and/or Python, with a PostgreSQL relational data model and cloud-hosted deployment (AWS/GCP). The MVP will expose clean REST (and future GraphQL) APIs for a web frontend and a future mobile app, include robust authentication/authorization, and integrate standard third-party services for payments, messaging, and identity checks. I’ll implement structured logging, error handling, baseline security, and a data model that supports assets, users, and relational objects, plus lifecycle/state management, event tracking, incident/task management, and user notifications. What you’ll get in Phase 1: - Backend MVP with API surface, authentication, and third-party integrations - Scalable architecture blueprint (microservices or modular monolith) and data model - Baseline security and observability (logging, errors, monitoring) - Clear assumptions and in-scope vs out-of-scope guidance - Delivery plan with milestones and a realistic timeline Proposed engagement: a lean team (1-2 developers) with a dedicated architect on a part-time basis to ensure architectural integrity and future scalability. Estimated cost: around 2,400-2,800 EUR, depending on final API surface and integration depth. Estimated duration: 8-10 weeks. Relevant experience and refer
€1,500 EUR in 20 days
6.6
6.6

Hello , I checked your project, and it looks interesting. This is something we already work on, so the requirements are clear from the start. We mainly work on PHP, Python, Website Design, UML Design, HTML, Node.js, PostgreSQL, Backend Development, API Development, Microservices We focus on making things simple, reliable, and actually useful in real life not overcomplicated stuff. Let’s connect in chat and see if we’re a good fit for this. Best Regards, Ali nawaz
€1,500 EUR in 7 days
6.6
6.6

! Hope you are doing well. I have read your project "Backend development - New project" details and understand your requirement. We are interested to work on your project. We are experienced in Backend Development, Microservices, PHP, Node.js, HTML, UML Design, Website Design, PostgreSQL, Python and API Development. Please visit portfolio page: https://www.freelancer.in/u/KayaCreation please inbox me so will discuss more over it and start working over your project and deliver what you looking for you will get unlimited revisions on given samples and at the end of task you will get all vector files Best Regards Kaya
€2,500 EUR in 1 day
6.4
6.4

With the ever-increasing importance of seamless digitalization, your web-based platform deserves the best talents, and I assure you, I am just that. My versatility in backend development and website design will ensure your asset management, user relationships, and recurring workflows are handled efficiently. Stepping into your early-stage project with internally defined functional flows, I promise to design a backend architecture that will not only meet immediate needs but also anticipate future evolution. My familiarity with Node.js, Python, and relational databases like PostgreSQL aligns perfectly with your preferred technology options. Additionally, my experience with utilizing widely adopted third-party services will guarantee a secure and optimized environment for payments, messaging/notification services, and even identity verification if required. You can rest assured that with me on board, logging errors and implementing baseline security best practices will be pillars in our work together.
€1,500 EUR in 7 days
6.3
6.3

Hi, I can develop the Phase 1 backend for your web-based platform, providing a scalable, modular architecture designed for future functional expansion. The MVP will include entity management (assets, users, contracts), lifecycle and state tracking, incident/task management, notifications, authentication/authorization, and APIs for web and future mobile frontends. I recommend Node.js with PostgreSQL for robust relational data handling, structured for microservices or modular evolution, and cloud deployment on AWS or GCP. Payment gateways, messaging services, and optional identity verification will be integrated using widely adopted APIs. Logging, error handling, and baseline security best practices will be implemented. Estimated timeline for MVP is 6–8 weeks, depending on integrations. I can work as a solo freelancer or small team for flexible engagement. Best, Justin
€2,000 EUR in 7 days
6.0
6.0

As an AI Mobile & Web Developer and professional writer with expertise in modern web technologies including Node.js and Python, I can be your 'one-stop solution' for all your technical, AI, and writing needs. With experience in creating intelligent web applications and chatbots integrated across multiple platforms, I am confident in my ability to develop the web-based platform you need. Scalability and future evolution are crucial aspects of any project's success- it is why I specialize in modular/microservices-based architecture and the use of cloud infrastructures like AWS or GCP. Moreover, my proficiency in relational databases such as PostgreSQL will ensure that your assets and user data are stored securely. In a rapidly evolving industry, it is important to stay connected with popular services to enhance your user's experience. I have successfully integrated payment gateways, messaging and notification services as well as identity verification and digital signature services in my previous projects. I would be diligent in ensuring their integration for your platform. , I guarantee efficient backend MVP development while providing a sound technical foundation for future scaling. Enthusiastically embracing your project scope, I am confident in my ability to develop a powerful backend architecture-centric platform that aligns perfectly with your vision.
€2,250 EUR in 7 days
5.7
5.7

Nice to meet you , It is a pleasure to communicate with you. My name is Anthony Muñoz, I am the lead engineer for DSPro IT agency and I would like to offer you my professional services. I have more than 10 years of working as a Backend and Software developer, I have successfully completed numerous jobs similar to yours therefore, and after carefully reading the requirements of your project, I consider this job to be suitable to my area of knowledge and skills. I would love to work together to make this project a reality. I greatly appreciate the time provided and I remain pending for any questions or comments. Feel free to contact me. Greetings
€4,042 EUR in 7 days
5.6
5.6

Hello, I recently delivered a backend MVP for a modular web platform managing assets, users, workflows, incidents, and event tracking using Python (FastAPI), PostgreSQL, and AWS, designed from day one for future module expansion and mobile consumption. The system included auth, payments, notifications, and clean API architecture. For your project, I propose a modular backend (FastAPI or Node.js), PostgreSQL schema with lifecycle/state tracking, JWT-based authentication, RESTful APIs, and integrations with Stripe (payments) and a messaging service (email/SMS). Architecture will support horizontal scaling and future microservices. Logging, error handling, and baseline security will be built in. Estimated MVP timeline: 8–10 weeks. Engagement model: individual senior developer. Scope assumptions: backend only, no frontend, no complex identity verification in MVP. Cost estimate: can be provided after a short requirements alignment call. I can start your project immediately and am committed to delivering the highest quality and fastest possible turnaround. Best regards, Elenilson
€1,800 EUR in 7 days
5.5
5.5

Hi, I can develop the Phase 1 backend MVP for your web platform, building a scalable architecture with Node.js or Python, PostgreSQL, and cloud deployment (AWS/GCP), exposing APIs for a web frontend and future mobile app. I’ll implement core entity management, lifecycle tracking, transactions, incident/task handling, user authentication/authorization, and integrations with payment gateways, messaging/notification services, and optional identity verification. The deliverables include a production-ready backend, modular architecture for future scaling, logging and security best practices, and documentation. I can provide cost and timeline estimates, assumptions on scope, and examples of prior projects with similar digital workflow and asset-management platforms. Best Regards, Hamza.
€2,000 EUR in 7 days
5.3
5.3

Your project to build a scalable backend for a web platform covering assets, users, workflows, and integrations aligns well with work I've done before. I helped a client digitize complex operations by designing a modular Node.js backend with PostgreSQL, enabling smooth entity lifecycle management, event tracking, and task linking—all exposed through clean REST APIs for web and mobile clients. Starting with a clear definition of MVP scope, I would ensure core features like authentication, asset and user management, notifications, and payment integration are solid. For scalability, I recommend a modular architecture from day one, using microservices or well-organized services that can grow without major rewrites. Logging, error handling, and security will follow best practices but stay lightweight initially. Two points I'd clarify: Do you have preferred third-party services in mind for payments and messaging? And should the initial MVP include identity verification fully or keep that optional for later? I can provide a detailed cost estimate and timeline once scope boundaries are firmed up. I work independently or can scale up with trusted collaborators if needed. Ready to start planning the backend foundation to meet your current goals and future growth.
€3,000 EUR in 7 days
5.5
5.5

Barcelona, Spain
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