Full-Stack Developer for StonePassport Platform

@infowider11

⭐️⭐️⭐️ StonePassport – Compliance Tracking Platform (Web & Mobile) ⭐️⭐️⭐️ Hello, I have gone through your JD and understand you need a compliance-first platform to create an immutable digital chain of custody for construction materials with GPS validation, lab integration, and QR-based verification. I will build a scalable, secure system using FlutterFlow + Supabase/Firebase with real-time tracking, OCR-powered lab parsing, and compliance automation aligned with Article 27 requirements. • Role-based user management (Foreman, Driver, Admin) • Lab report parsing (OCR/API integration) • Certification engine (Certified/Rejected logic) • GPS-based field capture with offline sync • Photo logging with metadata (timestamp, device ID) • QR-based Digital Material Passport (TTL secured) • Public verification page (no app required) • Geofencing (source & destination validation) • Automated compliance validation (Article 27 logic) • Chain of custody tracking & audit logs • EPA-ready PDF report generation • Admin dashboard for monitoring & analytics • Payment integration (Stripe) • Scalable backend (Supabase/Firebase) • API-ready architecture for telematics & hardware Let’s Chat… Thanks

@a4logic

Hello, As an established software company in Pakistan, we bring a wealth of experience and expertise to your project. We understand the significance of compliance and logistics in B2B applications. Our team has developed advanced web services, including compliance-focused solutions, like the one you require for StonePassport. We have a strong command over several Tech Stacks such as PHP, React Native, React.js, Node.js and Python and understand how to integrate them seamlessly to meet your needs. Throughout our track record, we've successfully developed and implemented QR code integration and PDF generation into numerous projects similar to StonePassport. Your project's demands actualize our existing knowledge and challenge us to further innovate, to create a robust, user-friendly application that satisfies all your requirements. We believe in creating reliability, accuracy, security, efficiency and performance in every task we undertake. Our client's satisfaction always remains at the forefront of our business operations; we value every feedback received whether positive or constructive because it inspires continuous improvement, a quality that sets us apart from others. With us, not only would you get the expected product on time but also avail our full range post-launch support for three months! Let's make your dream project a reality together. Choose us for quality; stay with us for excellence! Thanks!

@diektech

Hi, This is Elias from Miami. I have gone through your project description and understand you’re looking to build StonePassport, a compliance-focused platform. It sounds like an exciting opportunity to create something impactful in the compliance space. I have over 10 years of experience in full-stack development, including PHP, Python, and various front-end technologies. I focus on building scalable and secure applications that meet business needs. For this project, I would start by outlining the user roles and compliance requirements, then develop a robust architecture using Django for the backend and AngularJS or React Native for the frontend. I’ll ensure seamless integration for any necessary APIs and work on optimizing performance throughout the process. I have a few questions to get a better understanding: Q1 – What specific compliance regulations should the platform address? Q2 – Are there any existing systems that StonePassport needs to integrate with? Q3 – What types of user roles and permissions do you envision for the platform? I’d be happy to go through the details and suggest the best technical approach. Looking forward to hearing from you.

@n2rtechnologies

Hi, StonePassport needs a rock-solid backend that handles compliance without breaking a sweat. Before we dive in—are you thinking API-first architecture, or does the mobile experience drive the tech stack? I've built compliance platforms that scale. Let's talk details. Best Regards, Hasan

@ykarora26

With expertise in Full-Stack Development, I understand the need to build StonePassport, a compliance-focused platform for recycled construction aggregates. My experience in React for web, React Native for mobile, and Node.js for backend align well with your project requirements. Could you share more insights on the specific user roles' interactions within the system for better customization? Regards, Yogesh Kumar

@nikhilgarg96

Hi, As the creative powerhouse at CodeNomad Pvt Ltd, I am confident that my team and I are the perfect fit for this project. With over a decade of building impactful B2B applications and compliance apps, we have deep empathy for the unique needs of the aggregates industry. In terms of technology, our expertise in React Native, React.js, Node.js, and Python/Django make us a formidable choice to deliver the StonePassport platform efficiently. We're well-versed in PDF generation and QR code integration, ensuring that the core functionalities - lab upload, automated flagging, geologist approvals, passport generation and on-site verification - will be implemented seamlessly. Additionally, our sheer commitment to excellence extends to seamless hosting and a rough estimate indicates low-to-medium traffic hosting costs. Rest assured that your intellectual property right is our utmost priority. After completion of the project, you will have 100% access to all source code, assets and documentation. Let's partner to build a comprehensive solution which fulfills all your intents; we build more than just an application - we engineer experiences! Thanks....

@kareemmaize

Hi - Compliance platforms like StonePassport don’t drift on PDF generation, they drift when lab results, approval state, QR verification, and public passport status stop sharing one source of truth. A real flow should be: technician uploads CSV or manual results - backend validates against industry specs - flagged values go to geologist review - approval generates a Material Passport PDF - contractor scans the QR code onsite - mobile app shows the current live material status. This looks like a dashboard plus scanner, but it gets inconsistent when generated PDFs become stale while batch status changes later. Static passport links can lead to unexpected results in real use, so I handle it by making the QR resolve to a live verified status page, with PDF generation tied to approved snapshots. The part to get right early is the batch-status model, because it affects compliance, usability, and correctness. Relevant work includes B2B dashboards, QR workflows, and PDF/report generation; low-to-medium hosting would likely start around €50-€150/month.

@teodorgeorge

Hello, I'd be glad to help build StonePassport with a clean full‑stack setup using React for the dashboards and React Native for the QR scanner app. I’ve worked on similar compliance and tracking tools, so building the workflow from lab upload through automated checks and passport generation feels like a natural fit. I can also handle the PDF and QR integration along with a stable backend using Node.js or Python with PostgreSQL. Thanks, Teo

@zainalitariq245

Hi, I’ve carefully reviewed your project and I understand that StonePassport is a compliance driven platform where accuracy traceability and reliability are critical. This is not just a standard CRUD system but a structured workflow involving validation approval secure document generation and real time verification across web and mobile. For your platform I would use Next js for the web dashboards and React Native for the mobile app to ensure consistency and scalability. On the backend I recommend Node js with a structured API layer and PostgreSQL for strong relational data handling. The rule based engine will be designed to validate lab data against defined specs with clear flagging and logs so geologists can review and approve with confidence. For deployment I can set up a production ready environment using AWS or Vercel with scalable architecture and monitoring. I will also include clean documentation testing for the logic engine and provide post launch support as required. I can provide a clear sprint based timeline for an MVP along with a realistic hosting estimate based on expected traffic. Let’s discuss the details and move this toward a solid implementation. I’m waiting for your any kind of response. Thanks.

@XpertLabIndia

Hello, I’ve carefully reviewed the StonePassport requirements, and they fit well with the type of compliance-driven B2B systems I build, where structured workflows, approvals, and traceability are core. We have built B2B dashboards and logistics-style platforms with role-based access, approval flows, and real-time tracking systems. I can share relevant examples directly in chat as requested. We also have strong experience with PDF generation and QR code integration, including secure document creation, verification flows, and scan-based status updates designed for field use and compliance needs, with attention to data integrity and anti-tampering. For hosting, we usually finalize the estimate after confirming the preferred provider and deployment setup, so we can give an accurate monthly cost once that is decided. The system will be designed to stay efficient at low-to-medium traffic and scale smoothly as usage grows. From a delivery perspective, I would structure the MVP in phases covering the three roles first, then the rule engine, passport generation, and finally the mobile QR verification app, ensuring each part is stable before moving ahead. Looking forward to taking this forward :) Rohan

@koolvishruth

With my versatile expertise across domains like Artificial Intelligence and Machine Learning, Python Development and Automation, Full-Stack Web Development, Cloud & DevOps, Databases and more, I believe I'm tailor-made for this project as a Full-Stack Developer. I thrive on turning complex ideas into scalable software solutions - something StonePassport definitely demands. Having worked on projects involving QR Code integration and PDF generation, I'm no stranger to the compliance-focused functionality your platform needs. Let’s connect

@marjanahmed13

Hi! My name is Marjan and I'm here to offer you my services as a skilled applicant with over a decade of experience working on Freelancer.com. l believe I am the best fit candidate for this project due to my extensive experience; I would like to have a discussion to get to know that we both are on the same page. Once the scope will be locked, I will start working on it right away.

@technologiesit

With my decade-long experience as a Full Stack Developer, and my proficiency in AngularJS, Node.js, PHP and Python, I'm confident that I can build StonePassport to surpass expectations. In regards to the required tech stack, I have extensive knowledge in React, React Native and relevant backend technologies such as Node.js. I have also worked with AWS, Vercel and Heroku before, which makes me particularly well-suited to deploy and maintain your infrastructure. Furthermore, I've got hands-on experience dealing with large amounts of data, developing rule-based logic engines and building efficient interfaces for various user roles. This makes me the ideal candidate for implementing the core workflow of StonePassport – from lab results upload to material tracking via QR verification. Lastly, as a committed professional, your success will always be my priority. My services extend beyond development; as part of this project, I offer 3 months of post-launch technical support and 100% transfer of all source code upon final payment—granting you full ownership and control over StonePassport's IP. In conclusion, choosing me will not just get your StonePassport platform built but also a reliable partner who will work with you every step of the way to ensure it thrives for years to come!

@toriquldev123

Hello Dear! Greetings from Toriqul Global Solutions! We are pleased to introduce our company as a reliable and experienced provider of Web Design & Development services. Founded and led by Engineer Toriqul Islam, a B.Sc. graduate in Computer Science & Engineering from Rajshahi University of Engineering & Technology (RUET), our team brings over 10 years of industry experience. At Toriqul Global Solutions, we specialize in building modern, user-friendly, and high-performance websites that help businesses grow and stand out in the digital world. Our design approach focuses on simplicity, elegance, and functionality to ensure maximum user engagement. Technologies We Use: Custom Websites Development Using ======>Full Stack Development. 1. HTML5 2. CSS3 3. Bootstrap4 4. jQuery 5. JavaScript 6. Angular JS 7. React JS 8. Node JS 9. WordPress 10. PHP 11. Ruby on Rails 12. MYSQL 13. Laravel 14. .Net 15. CodeIgniter 16. React Native 17. SQL / MySQL 18. Mobile app development 19. Python 20. MongoDB What you'll get? • Fully Responsive Website on All Devices • Reusable Components • Quick response • Clean, tested and documented code • Completely met deadlines and requirements • Clear communication We would be honored to discuss your project requirements and help bring your ideas to life. Thank you for your time and consideration. Warm Regards, Toriqul Global Solutions

@ixorawebmob

Hello, I’ve gone through your project details for the StonePassport platform, and this is something I can definitely help you with. With over 10 years of experience in mobile and web app development, I specialize in React, React Native, Node.js, and Python. I focus on creating clean architectures and scalable code, ensuring your platform runs smoothly from lab to job site. I will first analyze your requirements, suggest the best technical approach, and then proceed with development, keeping you updated throughout the process. Here is my portfolio: https://www.freelancer.in/u/ixorawebmob I’m interested in your project and would love to understand more details to ensure the best approach. Could you clarify: 1. What is your expected timeline for completion? 2. Do you already have UI/UX designs or should we create them? 3. Are there any specific industry compliance standards you want us to follow? 4. Will this be a multi-tenant platform? 5. Do you have any examples of existing platforms that you like? Let’s discuss over chat! What is your expected timeline for completion? Regards, Arpit Jaiswal

@slavkom1

Hi there, I’ve read through the StonePassport idea and it’s clear what you need: a clean workflow that moves lab data all the way to a QR-verified passport without friction. I’ve built data-heavy dashboards and mobile tools before, including PDF and QR features, so the setup feels familiar. To deliver the MVP, I’d focus on: - Web dashboard with lab upload, rule engine view, and geologist approval - Logic engine for automated flagging - PDF passport generation with QR code links - Mobile app for scanning and live status - Cloud setup for smooth deployments I can start right away and expect the first sprint to be ready within a couple of weeks. Would you prefer the rule engine to be configured through a UI or defined purely in code for the first MVP? Greetings, Slavko

@DeyaaAhmed

Hi, I can build StonePassport, a compliance-focused web and mobile platform using Django and Django REST Framework for the backend, React for the Admin/Geologist dashboard, and React Native for the iOS/Android QR scanner. The system will feature a rule-based logic engine to automatically flag lab results against industry specs, a secure review workflow for geologists, and automated generation of PDF "Material Passports" with unique QR codes for on-site verification. I will ensure robust data integrity, secure user roles (Lab, Geologist, Admin), and seamless integration with AWS infrastructure. You will receive the complete source code, deployed production environment, and comprehensive documentation. I have extensive experience building B2B compliance and logistics platforms with PDF generation and QR integration, and can share relevant portfolio examples upon request. Estimated monthly hosting costs for low-to-medium traffic are approximately $50–$100. I also offer FREE post-delivery support beyond the initial 3 months to monitor system performance, adjust compliance rules if needed, and assist with any minor UI tweaks based on user feedback. Let's discuss the project in more details.

@mughiraaa

Hello, I will map user flows for lab geologist and admin in figma, then develop the web dashboard using next js with react and typescript, handling forms for csv upload and manual entry, parsing files on the backend using node js with nest js and validating data against rule based logic stored in postgresql, where each batch is checked against defined specs and flagged in real time, then creating a review interface for geologists with secure approval actions and audit logs, after approval generating a passport pdf using a server side pdf generator with embedded qr code linked to a public verification endpoint, while the mobile app will be developed in react native with camera access to scan qr codes and fetch live batch status via secure apis, hosting will be on aws with ec2 and rds and object storage for files, adding jwt based authentication role control and basic analytics, followed by testing for logic accuracy and qr scanning flow, deployment and a short guide for managing the system. Let's have a detailed discussion, as it will help me give you a complete plan, including a timeline and estimated budget. I will share my portfolio in chat I look forward to hear from you. Thanks Best Regards, Mughira

@vladang

You’re building a system where lab data must move cleanly through validation, expert approval, and into a verifiable field-ready document—without breaking trust at any step. The risk here isn’t UI, it’s data integrity and traceability across roles. I’d structure this as a clear pipeline: CSV/manual ingestion with validation guards → rule engine (modular + spec-driven) → geologist review layer with audit logs → signed PDF generation with embedded QR → mobile scan hitting a live status endpoint. Each step is state-controlled to prevent invalid transitions. For reliability, I’d add versioned rule sets and immutable batch records. Subtle improvement: QR scans should show a simple “status + last verified” view first—no overload on-site. Built similar flows in Bubbl (Vue/Nuxt/Express) handling structured data + approval systems with audit trails. I can outline an MVP sprint plan next. Q1: Are industry specs fixed or configurable per client/project? Q2: Does geologist approval require digital signatures or just system logging? Q3: Should QR scans work offline with cached verification?