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Subject: Project Launch: Technical MVP Implementation (React / Tailwind / Supabase) – 10-Day Sprint (Fixed Price)Hi,We are looking for a pragmatic, solution-oriented Full-Stack Developer to finalize the Minimum Viable Product (MVP) for our B2B cybersecurity platform, B2BCOP ("KMU-Notfall-Tresor") [3].Project Status & What is Already Done:Our frontend is entirely complete, fully designed, and validated. This includes the B2B dark-blue corporate design (Tailwind CSS), all reactive UI dashboard layouts, state managers, checklists, and calculators. More importantly, the entire client-side cryptography layer (AES-GCM-256 via native browser Web Crypto API) is already operational. Data is encrypted directly inside the browser and provided as an unreadable Base64-string. No frontend building is [login to view URL] Scope of Work (The 10-Day Sprint Layout):Your core job is to establish the data pipeline by connecting our existing React frontend to a clean, cost-efficient Supabase instance (PostgreSQL):Supabase Schema Setup: Establish a secure user authentication link and deploy two specific tables (vault_data for the encrypted zero-knowledge payloads and vouchers to manage license code validations).Voucher Gateway Implementation: Build a validation gate for the registration flow. When a user registers using a voucher code, the app must verify its availability, flag it as is_used = true to prevent multi-redemption, and lock the instance timeline to exactly 12 months.Frontend-Driven White-Labeling: We are explicitly omitting complex server-side white-labeling. You will utilize a central client configuration file ([login to view URL]). Based on the registered partner_id, the frontend must dynamically morph its UI primary accent colors, logo layouts, and local PDF data [login to view URL] Locking (Graceful Degradation): Build an expiration checker. If the license term is < 90 days from expiration, trigger a yellow warning dashboard banner. On day 365, freeze all entry masks and display an interface blockade offering a final encrypted PDF emergency backup [login to view URL] Project Rules & Safe Terms:Budget: Fixed Price (€3,500 – €5,000 depending on seniority and speed).Payment Terms: Structured into 4 strict Milestone payments based on live verification loops (No upfront payments).Code Handover: Delivery of fully functional, commented code into our private repository with a clear local verification [login to view URL] find the detailed architectural sheet attached: B2BCOP_MVP_Supabase_Specification.docx. It maps out the exact database fields and milestone definitions to let you start coding on Day 1 without conceptual [login to view URL] forward to your bid, your timeline verification, and a successful collaboration!Best regards, Jens
Project ID: 40738052
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As the founder of 360 Elevate, I’d be honored to offer my team’s expertise to finalize your B2BCOP MVP. With over a decade of experience building ERP, HRM, and CRM systems, we understand complex databases and full-stack frameworks such as PostgreSQL, AngularJS, and React. We can connect your existing React frontend with Supabase, build the required schemas, and ensure efficient authentication. Our UI/UX expertise is valuable for frontend-driven white-labeling and subscription locking. We have experience redesigning branded interfaces and generating dynamic PDF exports, while also implementing secure user flows with graceful degradation, frozen entry states, and warning prompts. We follow milestone-based delivery with thorough testing and TDD practices, providing verified functionality, private repository code, and opportunities for timely feedback. Beyond launch, 360 Elevate provides ongoing maintenance and support, offering a reliable long-term partnership focused on building and improving your B2BCOP platform.
€3,500 EUR in 30 days
9.4
9.4

Hi Jens, We understand you need a Full-Stack Developer to finalize the MVP for your B2B cybersecurity platform, focusing on connecting the existing React frontend to a Supabase instance, implementing voucher validation, and dynamic white-labeling. Our team has experience with similar projects, such as building a music voting mobile app using React Native and a furniture store mobile shopping app with Flutter, showcasing our proficiency in React and full-stack development. We'll deliver a fully functional code with a clear local verification test, ensuring a smooth handover. One question: Are there any specific security or compliance requirements we should be aware of during the implementation of the Supabase schema and voucher gateway? Feel free to message us to discuss the details! — Webbook Studio
€3,000 EUR in 30 days
9.3
9.3

Hi — Elias here from Miami. I see you're looking to implement a technical MVP for a cybersecurity project using React and Supabase. Understanding the importance of security and efficiency in your product is key. What usually matters most here is ensuring that the architecture supports scalability and maintainability. A common issue in systems like this is managing user roles and permissions effectively while integrating various components seamlessly. The tricky part is usually ensuring that the data flows securely while maintaining performance. My approach would focus on building a modular architecture that allows for easy updates and future expansion. I prioritize using best practices for state management and API integrations to ensure reliability and ease of maintenance. I've worked on similar projects involving complex data structures and user permissions, so I understand the nuances that need attention. A few questions to better understand the scope: Q1 – What specific user roles and permissions are you envisioning for this MVP? Q2 – Are there any third-party integrations you anticipate needing? Q3 – What are your scaling expectations once the MVP is launched? Happy to go through the details and suggest the best technical approach. Looking forward to hearing from you.
€4,000 EUR in 12 days
8.8
8.8

With over a decade of experience in full-stack architecture and high-scale systems, I understand the critical need for a pragmatic Full-Stack Developer to finalize the MVP for your B2B cybersecurity platform, B2BCOP ("KMU-Notfall-Tresor"). My background in high-security FinTech and experience in scaling projects for over 1 million users directly applies to the challenges your project faces in establishing a secure data pipeline and implementing complex authentication processes. In order to ensure the success of your project, one strategic insight I can offer is to prioritize the encryption and security protocols within the Supabase setup to guarantee data integrity and confidentiality. With my past success in building and scaling Telegram Mini Apps serving over 1 million users, I am confident in my ability to handle the complexity of your project and deliver exceptional results. I encourage you to reach out to discuss the roadmap for implementing the MVP for your cybersecurity platform. Let's collaborate to ensure the success of your project and deliver a high-quality solution that meets your needs.
€4,000 EUR in 45 days
9.0
9.0

Hello, We carefully studied the description of your project and we can confirm that we understand your needs and are also interested in your project. Our team has the necessary resources to start your project as soon as possible and complete it in a very short time. We are 25 years in this business and our technical specialists have strong experience in PHP, Java, JavaScript, PostgreSQL, AngularJS, Full Stack Development, Tailwind CSS, Supabase and other technologies relevant to your project. Please, review our profile https://www.freelancer.com/u/tangramua where you can find detailed information about our company, our portfolio, and the client's recent reviews. Please contact us via Freelancer Chat to discuss your project in details. Best regards, Sales department Tangram Canada Inc.
€3,987 EUR in 5 days
8.9
8.9

Hi there, I have extensive full-stack experience building secure web applications and can help you successfully finalize the B2BCOP MVP within your 10-day sprint. I understand this project is all about connecting your fully designed React frontend and client-side AES-GCM-256 encryption layer to a clean Supabase PostgreSQL backend, while strictly enforcing license expiration rules and dynamic white-labeling via partner configuration files. To achieve this efficiently, I recommend leveraging Supabase for secure user authentication and database schema deployment, paired with robust row-level security policies to protect the zero-knowledge encrypted payloads. I will implement the voucher validation gateway to properly track single-use redemption and enforce the 12-month timeline lock, alongside the expiration checker to trigger dashboard warning banners and emergency backup downloads as needed. My focus will be on clean, maintainable code with clear documentation and local verification tests to ensure a smooth handover into your private repository. I look forward to discussing how we can get started on Day 1.
€4,200 EUR in 30 days
7.9
7.9

Hello dear sir, With over 10 years of experience in web and mobile development, my team at P4logics has the skills to complete your cybersecurity platform MVP. We have strong experience with React, Java, Supabase and PostgreSQL, and can securely connect your frontend with Supabase. We can handle key backend tasks like authentication, database tables, migrations and licensing workflows. We also have experience with data security and building white-label solutions with partner-specific UI settings. We will focus on performance, subscription locking, grace periods and secure database operations. We follow clear milestones and will deliver clean, well-commented code to your private repository. Looking forward to work with you. Thanks and Regards Deepak
€4,200 EUR in 35 days
8.0
8.0

As a Full-Stack Developer with over a decade of experience, I am confident I possess the right skill set to complete your B2BCOP project within the specified 10-day sprint. My proficiency in React, Tailwind and Supabase(PGSQL) has been demonstrated in numerous successful projects. In particular, my familiarity with the browser native Web Crypto API aligns well with your existing use of client-side cryptography. I prioritise secure user authentication which is also core to your project's table setup. I am also skilled in managing license codes and validating them, synchronizing well with the voucher gateway implementation you require. Concerning white-labeling strategy, my approach as outlined in your brief is built on utilising a central client configuration file for frontend-driven white-labelling. As you have explicitly mentioned wanting to avoid complex server-side operations, this should satisfy your concerns and keep the MVP within scope. Lastly, I appreciate your strict budgeting and payment terms, all of which I am comfortable with. Rest assured that if I have the opportunity to work on your project, I will deliver fully functional code that is both reliable and well-commented every step of the way. Thanks for considering me for the task! Let's ensure a successful collaboration!
€3,500 EUR in 30 days
8.0
8.0

React | Supabase | PostgreSQL | Full-Stack Development Hi Jens, Thanks for sharing the details. You have explained your requirements very clearly. I understand that the B2BCOP frontend and browser-based encryption are already complete, and the main task is to connect the existing React application to Supabase and implement the backend workflows within your 10-day sprint. I can help with: * Supabase authentication and secure PostgreSQL schema setup. * Voucher validation with atomic redemption and 12-month license activation. * Partner-based white-labeling through partnerConfig.js. * Subscription expiry checks, 90-day warning banners, and 365-day access restrictions. * Encrypted emergency PDF backup functionality. * Testing, documentation, and handover through your private repository. Relevant portfolio: * DolphinAI – SaaS * FC Research Dashboard * Calendar Pro * UIS Canada I would first review the existing codebase and technical specification, then organize the work around your four milestones and verification requirements. The 10-day timeline looks like a reasonable target to assess against the existing implementation and the detailed specification. I’m comfortable discussing the fixed-price scope and milestone-based delivery. Best regards Purnima
€4,000 EUR in 20 days
8.0
8.0

The frontend being finished is actually a big advantage here, because it lets the sprint focus on the part that can break an MVP if done loosely: auth, voucher redemption, subscription timing, and controlled data access around encrypted payloads. I’d approach this by keeping the Supabase setup minimal but robust, with clean tables, safe registration checks, and expiry logic that is easy for your team to verify milestone by milestone. I’ve handled similar React + backend integrations where the product logic mattered more than raw page building—things like gated onboarding, state-based UI restrictions, and time-bound access rules. For a cybersecurity-oriented product, the main goal should be reliable behavior and maintainable code, not unnecessary abstraction that slows the handover. I can also make sure the code comments and local test steps are clear enough for your repo review process. - Do you want voucher redemption and is_used marking to be protected with a transaction/server-side function to avoid race conditions if two users try the same code almost simultaneously? - Should the <90 day warning banner appear on every dashboard session automatically, or only once until dismissed? - For the encrypted PDF emergency export, is the export generator already present in the frontend and only needs license-state wiring?
€3,000 EUR in 7 days
7.8
7.8

⭐⭐⭐⭐⭐ Build Your MVP for Cybersecurity Platform with React & Supabase ❇️ Hi My Friend, I hope you're doing well. I've reviewed your project requirements and see you're looking for a Full-Stack Developer for your MVP. You don't need to look any further; Zohaib is here to help you! My team has completed over 50 similar projects for MVPs. I will connect your React frontend to Supabase, ensuring a smooth data pipeline and secure user authentication. ➡️ Why Me? I can easily finalize your MVP using my 5 years of experience in web development, focusing on React, Supabase, and Tailwind CSS. My expertise includes building secure data pipelines, user authentication, and dynamic UI configurations. Additionally, I have a strong grip on PostgreSQL and client-side cryptography, ensuring your platform is both efficient and secure. ➡️ Let's have a quick chat to discuss your project in detail. I can provide samples of my previous work and show how I can add value to your project. Looking forward to discussing this with you! ➡️ Skills & Experience: ✅ React Development ✅ Supabase Integration ✅ Tailwind CSS ✅ PostgreSQL ✅ User Authentication ✅ Data Encryption ✅ API Development ✅ Frontend Design ✅ UI/UX Optimization ✅ Agile Methodologies ✅ Version Control (Git) ✅ Debugging and Testing Waiting for your response! Best Regards, Zohaib
€3,400 EUR in 2 days
7.9
7.9

Hello, I can help you with "React/Supabase Full-Stack Dev for Cybersecurity MVP" as per your given project description. We can discuss more in detail during a chat conversation when you are available. I've worked on many PHP projects in recent times. So I am confident on achieving your expected Goals. Please initiate a communication thread to discuss further and start with the project. ⭐ 5.0/5 from a recent client: "Good work delievered thank you for your patience" Final timeline and cost will be confirmed in chat after a complete understanding and documentation of the project expectations in detail.
€3,000 EUR in 67 days
7.6
7.6

Hi i have carefully reviewed your attached B2B specification document and im interested in your project and can present my previous work as references. I can complete the B2BCOP MVP within the 10 day sprint by connecting your existing React and Tailwind frontend to Supabase PostgreSQL iwill implement secure authentication, vault data storage with RLS, voucher validation and single redemption, partner based configuration, subscription expiration warnings, and the day 365 application lock with encrypted PDF backup. I’ll work directly with your existing frontend and preserve the client side AES GCM encryption. I’ll follow the four milestone structure, test each verification loop, and deliver clean commented code with local setup and verification instructions to your private repository. Could you share the current React repository and specification document so i can verify the integration points and start with milestone1??? Review my portfolio, https://www.freelancer.com/u/Hammadhassan21 Best regards, Hammad...
€3,500 EUR in 28 days
7.6
7.6

Hello, Yes, we can help you with this project. I have few questions related to your project specification. Lets discuss over chat. Our specialty:- Angular, React, Nodejs, WordPress, PHP, Laravel, CodeIgniter, CakePHP, MySQL, Mongodb, PostgreSQL, Mobile App for IOS and Android, HTML5, Bootstrap, JavaScript, etc... Why choose us: 1. Over 130 projects & 5 out of 5 star rating 2. No bad review yet 3. Most importantly 39% repeat hire rate [It's hard to find that kind of percentage here in freelancer] Thank you Liza
€4,000 EUR in 27 days
7.7
7.7

Hello, B2BCOP React + Supabase MVP {{{ I HAVE CREATED SIMILAR BEFORE AND I CAN SHOW YOU }}} I have gone through your requirements and understand that the React/Tailwind frontend and browser-side AES-GCM-256 encryption are already complete. The remaining work is the secure Supabase/PostgreSQL data pipeline, voucher validation, partner-based frontend configuration and 12-month subscription locking. I have 11+ years of experience with React, Supabase, PostgreSQL, authentication, API integration and secure application workflows. I can implement the vault_data and vouchers schema, registration/auth flow, single-use voucher validation, partner_id configuration, dynamic branding and PDF export logic. I’ll also implement the expiration rules: 90-day warning banner, day-365 access lock and final encrypted PDF emergency backup, while keeping the encrypted payload unreadable by the backend. I can work within your 10-day sprint and deliver through 4 verification-based milestones, with clean commented code, tests and private repository handover. I WILL PROVIDE 2 YEARS OF FREE ONGOING SUPPORT AND COMPLETE SOURCE CODE. Thanks,
€3,000 EUR in 16 days
7.4
7.4

Hi Jens, Your MVP scope is clear, and I can work directly on the existing frontend rather than rebuilding it. I can handle the Supabase schema, authentication, voucher validation, 12-month licensing, partnerConfig white-labeling, expiration logic and encrypted backup flow. I’m comfortable working with milestone-based delivery and private repositories, with each stage verified before moving forward. ✅Timeline: 15 days ✅Budget: €3000 fixed I can ✅start immediately and work from the provided specification from Day 1. Thanks
€3,000 EUR in 15 days
7.6
7.6

Hello!, I am a US-based senior software engineer, and this MVP looks like a focused 10-day sprint where the main challenge is turning the product idea into a secure, clean, shippable full-stack system without waste or rework. I can take this from concept to working MVP in a practical way: 1. Confirm scope, user flows, and the true minimum feature set 2. Build the React + Tailwind frontend with a clean, cybersecurity-friendly UI 3. Set up Supabase auth, database schema, and secure access patterns 4. Wire the backend logic, validations, and required integrations 5. Test, harden, and deploy so you have something usable at the end of the sprint I pay close attention to the details that usually get missed, especially around structure, permissions, edge cases, and making sure the MVP is actually usable by real users. My goal is to deliver something solid, not just “working on my machine.” Relevant work I’ve handled includes: - React/Supabase internal dashboard for a compliance team - Secure SaaS admin portal with PostgreSQL and role-based access - Tailwind-based MVP for a data reporting platform - Full-stack workflow tool with API integrations and automated alerts Could you please clarify the following questions to help me better understand the project? 1. What are the must-have MVP features for the first release, and what can wait? 2. Do you already have wireframes, branding, or a data model in place? 3.
€4,300 EUR in 14 days
7.0
7.0

A ten-day fixed sprint for a security product usually means the MVP needs to be demoable, not production-hardened. That line is worth drawing on day one, because it decides what gets built after that. The piece I'd give the most time is Supabase's row-level security and auth model. In a cybersecurity product, access control is the demo. If tenant isolation leaks, nothing else in the interface matters. I come at this from 15 years in infrastructure, so auth and permissions go first rather than last. I've also shipped at speed: a mobile ticketing platform at Eleven Digital hit 25,000+ installs in its first week, and I took one site from 4+ second loads to sub-second at Allrites, which turned out to be a query and caching problem hiding behind the UI. Which parts are essential to the demo, and which are stretch?
€3,000 EUR in 7 days
6.6
6.6

As an experienced Full-Stack Developer, I believe I possess the necessary skills and expertise to successfully take on your Cybersecurity platform project. My understanding of the React/Tailwind/CSS/Supabase tech-stack aligns perfectly with your requirements. I've been professionally developing for over 8 years, giving me not only technical proficiency but also a strong knack for problem-solving - something that holds immense significance in the cybersecurity realm. My prior experience includes establishing robust data pipelines, like you'll need in this project. And my prowess with PostgreSQL would significantly aid in creating the secured authentication link and deploying requisite tables such as 'vault_data' and 'vouchers'. My proficiency extends to syncing frontend functionality with backend logic, as you need in your frontend-driven white-labeling requirement. Understandably, you need a developer who can hit the ground running without any conceptual delay, and my slick journey from extensive collaboration work to freelancing proves just that. Additionally, being adept at Linux, Git & Docker ensures smooth DevOps which is essential for safe delivery of a coded project.
€3,000 EUR in 10 days
6.7
6.7

Hi, I can implement the backend MVP exactly around the supplied specification, connecting the existing React/Tailwind frontend to Supabase while preserving the current client-side AES-GCM-256 zero-knowledge architecture. I’ll set up the PostgreSQL schema and RLS policies, secure authentication-to-vault relationships, atomic voucher validation and 12-month activation logic, partnerConfig-based white-labeling, expiration enforcement, and the encrypted emergency PDF workflow. I’ll validate each milestone against the specified verification metrics and keep the implementation focused on the defined 10-day MVP scope. Question 1: For the voucher RPC, should voucher redemption and user binding be performed as one atomic database transaction so concurrent registration attempts cannot redeem the same code? Question 2: For the expired-state PDF backup, is the existing frontend already able to decrypt the local AES-GCM data and generate the password-protected PDF, or does this MVP also require implementing that export/encryption functionality? Regards, Houssame.
€3,000 EUR in 20 days
6.5
6.5

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