MVP Development: Dispute Automation System

@Microlent

Hello, I specialize in building secure, production-grade SaaS MVPs and can deliver your dispute automation platform from connectors through staging deployment. What I Offer: Completion & hardening of Shopify, Stripe, and PayPal OAuth connectors, plus carrier integrations (UPS/FedEx/USPS/Canada Post) with reliable fallbacks Backend: Node.js + TypeScript (NestJS/Express), PostgreSQL schema, Redis + BullMQ job queues, S3 storage, audit logs, RBAC, encrypted secrets, and token handling Evidence pipeline: normalization, checklist handling, reorderable exhibits, redaction toggles, PDF generation with Puppeteer (watermarks, cover letters, indexing) Submission flows to Stripe/PayPal APIs, deadline brain with alerts (72/24/2 hours), analytics instrumentation Frontend: polished React UI for evidence composer, case timelines, and role-based dashboards Security-first implementation: PII redaction, MFA/session controls, secure token storage CI/CD pipelines + IaC (Terraform/CloudFormation or documented scripts) with staging deployment and support runbook Experience: 12+ years in production SaaS with deep expertise in Stripe/PayPal APIs, OAuth connectors, job queues, and compliance-heavy B2B platforms. Proven success generating PDFs at scale, securing PII, and delivering resilient dispute/finance workflows. Best regards, Vicky Keswani

@irsolutions

With over 10 years of experience in web and mobile development, specializing in full-stack engineering and automation systems, I understand the critical nature and complexities involved in building your Dispute Automation System MVP. Your project's focus on automating evidence collection, composing indexed PDF dispute bundles, and integrating with Shopify, Stripe, and PayPal align perfectly with my skill set. In the realm of B2B SaaS and fintech, I bring a wealth of experience in developing robust solutions that streamline processes and enhance operational efficiency. My track record includes successful implementations in payments, eCommerce, and compliance-heavy tools, ensuring that I can meet the demands of your project seamlessly. To ensure a smooth and successful collaboration, I encourage you to reach out to discuss how I can add value to your project. Let's connect to explore how my expertise and past successes can contribute to the timely and effective completion of your MVP Development: Dispute Automation System.

@Hammadhassan21

Hello, Hope you are doing well! I’ll build a secure, production-ready MVP that will auto-ingests Stripe and PayPal disputes, fetches and normalizes Shopify order and payment and shipping data, and generates indexed, watermarked PDF bundles using headless Chromium. I’ll complete OAuth-based connectors, implement the evidence composer with redaction and exhibit tools, and set up submission flows, deadline alerts, and background jobs with Redis + BullMQ. Using Node.js (NestJS), PostgreSQL, S3, and React, I’ll deliver full RBAC, audit logs, secure token handling, and CI/CD-ready staging with full test coverage. You’ll get a deployable system, runbook, API docs, and simulation scripts—built for reliability, speed, and compliance. Fixed price and milestone plan available on request. NOTE: "I've some questions regarding your project so ping me on chat to discuss your project in detail then we will move forward" Please check out my profile to review my past projects and portfolio. https://www.freelancer.com/u/Hammadhassan21 If you find my bid satisfactory, we will be happy to discuss your project in detail. Thanks.

@Fazeennazar

With over seven years as a senior engineer, I bring a wealth of experience to the table that aligns perfectly with your project needs. With fluency in multiple languages, including Node.js which you prefer for the backend, I am well-versed in all aspects of building and scaling production web applications. Moreover, my strong knowledge of the Stripe and PayPal APIs will allow me to adeptly handle the task of tightening and securing their connectors. I have an extnsive background with job queues and background workers, key components for your dispute automation system. I also have previous working experience with Puppeteer/chromium based PDF generation showcasing my understanding on automating evidence indexing so critical for your product offering. My security acumen will add value by enabling me to properly handle sensitive PII data in adherence with regulations. Additionally, my expertise building shipping integrations, compliance-heavy B2B tools and familiarity with S3-compatible storage aligns well with your detailed scope. Finally, given my record of adhering to timelines within budget, together we can achieve the milestones you're aiming towards in this 4-6 week engagement. Choose me today, we can create a deployable staging environment that exceeds your expectations while keeping our communication lines open at all

@ZohaibRoy

⭐⭐⭐⭐⭐ Build Your MVP for Automated Evidence Collection and Dispute Management ❇️ Hi My Friend, I hope you're doing well. I've reviewed your project details and see you're looking for a full-stack engineer for your MVP. Look no further; Zohaib is here to help you! My team has successfully completed 50+ similar projects for building robust web applications. I will create the necessary connectors, enhance the backend, and develop a polished React UI while ensuring security and efficiency. ➡️ Why Me? I can easily handle your MVP project as I have over 5 years of experience in web development, focusing on Node.js, TypeScript, and integrations with Stripe and PayPal. My expertise includes building secure applications, working with OAuth connectors, and managing job queues. Additionally, I have a strong grip on deploying applications in cloud environments, ensuring your project is completed efficiently. ➡️ Let's have a quick chat to discuss your project in detail. I can show you samples of my previous work that demonstrate my capabilities. Looking forward to chatting with you! ➡️ Skills & Experience: ✅ Node.js ✅ TypeScript ✅ React ✅ Stripe API ✅ PayPal API ✅ OAuth Integration ✅ PostgreSQL ✅ Redis ✅ Puppeteer ✅ CI/CD ✅ S3 Storage ✅ Security Best Practices Waiting for your response! Best Regards, Zohaib

@badarmadni927

Hi, What specific features or challenges are you anticipating in automating evidence collection and submission for your MVP? After carefully reviewing your project, I identify opportunities to streamline the Shopify, Stripe, and PayPal connectors while ensuring strong security protocols are in place. I’m a full-stack engineer with over 5 years of experience in building production web apps, particularly with Node.js, React, and integrating payment APIs like Stripe and PayPal. I’ve effectively utilized OAuth and job queues, which I believe will align perfectly with your requirements. I can deliver a polished React UI for your evidence composer and ensure the backend is both robust and secure. I’m prepared to create a detailed plan and timeline for milestones that meet your needs. Let’s discuss your vision further! Best Regards, badar

@DeveloperStation

Hi Klein, We’ve built similar MVPs that automate evidence collection and generate indexed PDFs for Stripe and PayPal disputes. Our solution integrated with Shopify and used AI to auto-fetch evidence, achieving a 90% success rate. We also developed a Chrome extension for manual evidence collection, which was later adapted for Amazon seller central. As a full-stack developer with 15 years of experience, I’ve worked extensively with Node.js, React, and Python, and I’ve led multiple startups from concept to acquisition. I’m equally comfortable with backend and frontend tasks, ensuring you get a versatile developer instead of a specialist. 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

@paul612

With over four years of experience in the trenches of full-stack development, particularly in architecting and implementing complex web applications like what you're envisioning, I'm confident in my ability to deliver on all the key responsibilities. My solid background on integrating with Stripe and PayPal APIs paired with my experience building secure and encrypted systems will be instrumental in your project's success—not to mention my strong experience generating PDFs reliably with Puppeteer or equivalent, which is crucial given the unique challenges that arise with creating watermarked/redacted indexed PDFs via headless Chromium. Given my AI integration expertise, I can help automate evidence collection—streamlining your service for efficient dispute handling. My proficiency in Node.js (NestJS or Express) and Python (FastAPI) makes me quite adaptive too—I'm more than willing to work with the tech stack you prefer. My competitive approach driven by data could ensure your product remains forward-thinking—with analytics to track essential metrics as described—and grows alongside evolving market needs. Paired with my results-first mindset that prioritizes tangible outcomes above all else, there's no doubt we'll execute this project in a way that deeply satisfies your requirements.

@tayabani

Hi There Klein U., Good afternoon! I am professional mobile programmer with skills including Python, PostgreSQL, OAuth, PHP, Website Design, Java, FastAPI, Node.js, Redis and Stripe. Please contact me to discuss more regarding this project. Thanks for giving opportunity

@jorgenc223

With over a decade of software development experience focused on building production-grade web apps and integrating with APIs, I am confident in my ability to deliver and exceed your expectations for this project. I have a comprehensive understanding of OAuth connectors, which will be invaluable in tight integration with Shopify, Stripe, and PayPal APIs. Having worked on job queuing systems and background workers extensively in the past, I'll ensure the non-blocking nature of your application and optimize its performance. Additionally, my expertise in generating PDFs reliably using Puppeteer/headless Chromium and strong security mindset regarding PII handling make me uniquely qualified for this project. I prioritize secure handling of sensitive data like PII as per your requirements - confidential information will be encrypted and never stored unnecessarily. Given my prior work with payment-related applications, I am well-versed with the nuances of B2B tools in a compliance-heavy environment; an element that resonates profoundly with your project requirements. Choosing me for this project ensures more than just another full-stack engineer; it offers you an innovative problem-solver who can streamline process workflows while never compromising on security or quality. Looking forward to bringing my knowledge to help automate dispute resolution effectively and efficiently!

@Apurva510

Dear Client, With over 7 years of experience as a full-stack developer, I am confident in my ability to deliver a high-quality solution for your MVP project. I have a proven track record of building production web apps and integrating with complex APIs such as Stripe and PayPal. My experience with OAuth connectors like Shopify will also be valuable for this project. Having previously worked on projects that required job queues, background workers, and PDF generation using Puppeteer (or equivalent), I possess the technical know-how to ensure smooth data handling and reliable PDF generation within the required timelines. My strong security mindset will ensure your users' data is handled securely, adhering to MFA/session controls and PII redaction policies. Furthermore, my previous experience with payments and disputes would allow me to quickly grasp the nuances of your project and provide efficient solutions. My proficiency with deploying cloud-based infrastructure and utilizing services like S3 storage for files aligns well with the technical stack you have mentioned. Your vision of a polished React UI can be realized seamlessly given my experience with modern JavaScript frameworks like React and Angular11+. I eagerly anticipate contributing to your project's success!!! Thank you!!!

@zainalitariq245

Hello @klein3, I can build your MVP using NestJS, React, PostgreSQL, and the tools you listed. I’ve worked with Stripe, PayPal, Shopify APIs, and used Puppeteer for PDF creation. I can handle both backend and frontend, set up secure flows, and deliver a working staging version with docs. I can finish this in 5–6 weeks. My fixed price is [insert your price]. Let me know if you'd like to talk more. Warm Regards, Zain

@abhisaini0188

Hello, Thank you so much for posting this opportunity. It sounds like a great fit, and I’d love to be part of it! I’ve worked on similar projects before, and I’m confident I can bring real value to your project. I’m passionate about what I do and always aim to deliver work that’s not only high-quality but also makes things easier and smoother for my clients. Feel free to take a quick look at my profile to see some of the work I’ve done in the past. If it feels like a good match, I’d be happy to chat further about your project and how I can help bring it to life. I’m available to get started right away and will give this project my full attention from day one. Let’s connect and see how we can make this a success together! Looking forward to hearing from you soon. With Regards! Abhishek Saini

@AutomateBoring

Hey Klein U., Good afternoon! I am skilled mobile software engineer with skills including OAuth, PHP, Python, FastAPI, Stripe, Redis, Website Design, PostgreSQL, Java and Node.js. Please send a message to discuss more regarding this project. Best Regards

@designfacecom

With over 4 years of experience in building production-grade web applications, integrating with payment gateways such as Stripe and PayPal, and working with OAuth connectors, I'm confident that I would be a valuable addition to your team. My proficiency in Node.js, TypeScript, and Python - including FastAPI - position me well to handle your project's back-end needs adeptly. Additionally, my hands-on experience with job queues, background workers, and my understanding of redux makes me suitable for the task you've laid out in the initial market for US & Canada merchants using Shopify, Stripe, and PayPal. In terms of security, I understand the utmost importance of PII redaction policy and secure handling of data. I am well-versed in encrypted tokens storage and have proven experience working with confidential information, aligning perfectly with your requirement for a strong security mindset in the context of this project. Drawing from my solid engineering background and aware of your tight timeline without compromising on quality delivery expectation, I believe engaging me will be a winning deal for both ends. My bid comes inclusive of a detailed project timeline and milestone breakdown specific to your requirements. Looking forward to discussing how we can bring advancement to your automated dispute system through seamless integration together!

@mughiraaa

Hey, i will finalize the connectors for shopify, stripe, and paypal using oauth for secure sync and ensure carrier tracking through ups, fedex, usps, and canada post with fallbacks where needed. the backend will be structured in node.js with typescript using nestjs, with postgresql as the main database and redis with bullmq for job queuing and background tasks. evidence will be normalized in a structured schema, with checklist handling for dispute preparation. the composer will be developed in react with reorderable exhibits, redaction toggles, and pdf generation handled through puppeteer with headless chromium, including watermarks and cover letter templates. submission flows will connect directly to stripe and paypal apis, with polling for outcomes and a deadline brain to manage timers and alerts stored in utc and displayed locally. analytics instrumentation will be added with event tracking, role-based access with jwt, encrypted secrets, audit logs, and s3-compatible storage for files. 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 Regards, Mughira

@dataspro

Nice to meet you klein3, 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

@GameOfWords

With over 5 years of experience in the world of web and mobile app development, I can confidently say that I have the skills necessary to take your dispute automation system all the way from conception to a fully functioning deployable staging environment. I noticed that in your project description you mentioned a preference for Node.js and TypeScript, but if you'd prefer Python (FastAPI), I'm more than comfortable working with that as well. The most important thing to me is delivering a product that solves problems effortlessly and meets all objectives. Moreover, my prior experience with integrating payment systems, dealing with shipping concerns, and understanding the weight of compliance-heavy B2B tools is sure to prove an asset in tackling the challenges this project presents. I've also worked extensively with Stripe and PayPal APIs, so connecting to them will be a breeze. In terms of security, rest assured that PII redaction, token storage, encrypted secrets are all front and center in my mind when developing any application. Ensuring those are tight is non-negotiable for me. Lastly, it's impossible not to mention my commitment to milestone-based delivery and communication. It's all about transparency with me; my clients see every step of progress we make together so there are no surprises down the road.

@rbtech1984

Hello There!!! ⭐⭐⭐⭐ You are building a B2B SaaS MVP that automates dispute handling for Stripe and PayPal by collecting evidence, generating indexed PDFs, and managing submission flows. The goal is a secure, production-ready system with strong integrations, polished UI, and full staging deployment within 4–6 weeks. ⭐⭐⭐⭐ Key points I can deliver: * Shopify, Stripe, PayPal, and carrier API integrations with OAuth * Evidence composer with PDF generation (Puppeteer + watermarks/redaction) * Secure backend with PostgreSQL, Redis + BullMQ, RBAC, and audit logs * React frontend for dispute management, deadlines, and analytics * CI/CD setup, staging deploy scripts, and detailed runbook Execution Plan: I will use Node.js + TypeScript (NestJS) with PostgreSQL and Redis for scalable backend, React for the UI, and Puppeteer for robust PDF generation. OAuth flows will securely connect Shopify, Stripe, and PayPal, while background workers handle dispute syncing and submissions. The system will follow strict PII handling with encryption, redaction, and audit-ready security. Deliverables will include source code, deployment scripts, API docs, and test accounts simulating full dispute cycles. With 9+ years of full-stack experience, especially in payment API integrations and secure SaaS platforms, I bring reliability, clear communication, and top-quality results. Let’s connect and shape this MVP into a launch-ready product. Best Regards, Farhin B.

@ahmedmubshar1

Hi, Do you want the priority to be finishing and hardening the Stripe/PayPal/Shopify connectors first, or building out the evidence composer with PDF generation so the flow is testable end-to-end? I’ve worked with dispute workflows before OAuth connectors, background job queues (Redis + BullMQ), and secure PDF generation with Puppeteer so your stack and requirements align well with my experience. I’ll structure the backend in Node.js + TypeScript with PostgreSQL and S3 storage, React on the frontend, and ensure secure token handling, audit logs, and RBAC are built in. CI/CD and staging deployment will be fully documented with a support runbook. The outcome will be a stable MVP where merchants can go from dispute ingestion to indexed PDF submission in under 30 minutes, exactly as you’ve defined. Ahmed