Guarantee Overlay Backend & Frontend Development -- 3

@Microlent

I went through the requirement carefully, this is not “just an overlay”, it’s a time-critical compliance engine where backend logic, state transitions, and edge cases decide refunds. That’s where most teams fail if it’s UI-led instead of rule-led. I’d structure this as a backend-first system in NestJS with a deterministic timeline engine. Every meetup instance gets a computed timeline at creation (base + distance adjustment + extensions), persisted as immutable checkpoints. Frontend never decides eligibility — it only renders the next required action based on backend state. Auto-forfeit, auto-send, refund eligibility, and “Ah Shucks” blocking are all enforced server-side to avoid client tampering. Media collection (selfie, outfit, video, location) is handled as signed, short-lived S3 uploads with strict IAM scope. Each action stores timestamps, device state, and verification metadata so offline resume, retries, and UTC edge cases remain consistent. LLM flagging runs asynchronously and never blocks the user path. Notifications are driven by the timeline engine (SNS), not cron guesswork. Timeline: aligned to your single-milestone plan Cost: fixed, based on final scope confirmation Happy to walk through the timeline state machine if shortlisted. Best regards, Jenifer

@dfordesigners

Hi Nick V. I’m your web developer, ready to turn your project Guarantee Overlay Backend & Frontend Development -- 3 into reality! I’d love to discuss the details and create something amazing together. Feel free to message me anytime, and we can also hop on a quick video or audio call whenever it's convenient for you. I’ve developed many projects exactly like what you’re looking for. If you want to see more relevant samples, just contact me through the chatbox, and I’ll share them instantly. ★ Why Clients Trust Me 500+ successful web projects delivered 430+ positive client reviews Expert in JavaScript, Angular WordPress, Shopify, PHP, JavaScript, HTML, CSS, Plugin/Theme Development, Laravel, WebApp Clean, modern, responsive and SEO-optimized designs Fast delivery, great communication, and long-term support Available during EST hours for smooth collaboration If you want a professional developer who delivers quality work on time and stress-free, let’s connect. I’m excited to help build something amazing for you. Best regards, Kausar Parveen

@giaphung2k1

Hello Proposed development for your guarantee overlay (backend & frontend). I will implement a seamless, robust solution, precisely per your 3 requirements document. Expect a high-quality, fully functional overlay meeting all specifications. Confident I can deliver this efficiently. Ready to discuss your project. Giáp Văn Hưng

@enervell

Hi, There I’m a senior full-stack developer with nearly 10 years of experience building secure, production-ready systems, and I’m confident I can take full ownership of your Guarantee Overlay backend and frontend work. I have hands-on experience with Angular Ionic and Node.js (NestJS), and I’m comfortable adapting and extending an existing polished frontend while building a clean, decoupled backend. I understand this project is not just UI — it’s about timed workflows, compliance rules, edge cases, and reliability, and I’ve built similar rule-driven systems before. On the backend, I’ve worked with PostgreSQL, MySQL, MongoDB, Oracle, and DynamoDB, and I’ve securely handled media pipelines using AWS S3 with minimal IAM permissions. I’m also experienced with AWS infrastructure (EC2, ECS, EKS, Lambda, API Gateway) and designing for high availability and performance. From a UX perspective, I can deliver a configurable timeline engine with a drag-and-drop admin interface that’s intuitive and safe to use. I pay close attention to user flow, animations, accessibility, and performance. I’m thorough with testing and QA (Jest, edge cases like offline resumes and timezone handling), write clean documented code, and think long-term about maintainability and scalability. If you want someone dependable who communicates clearly, moves fast, and treats this like a real product—not a demo—I’m ready to start. Thanks. Luis.

@shanec35

Hello, I have carefully analyzed your requirements for building a NestJS backend and integrating it with an existing polished Angular Ionic frontend to power the Guarantee Overlay system. I recently completed a similar project involving timed verification workflows, media capture, AWS S3 storage, push notifications, and admin-configurable timelines for a mobile-first application. Your project requires a decoupled backend, configurable timeline engine, secure media handling, and seamless overlay UX. I will implement the NestJS APIs, schema-first architecture, AWS S3 integration, SNS notifications, LLM flagging hooks, and Jest-tested logic, then adapt your Angular Ionic frontend to support the overlay interactions, permissions, modals, and admin timeline editor as specified. I am available to begin work immediately and am committed to delivering a high-quality, well-tested solution within the shortest possible timeframe. Best regards, Elenilson

@dtk507

Hello! I understand that you're seeking to build the backend and adapt the existing frontend for the Guarantee Overlay project. This innovative feature will verify user interactions for event meetups, which is both intriguing and essential. With over five years of experience in developing complex Node.js and Angular applications, I’ve delivered high-performing solutions that meet client requirements. For one project, I successfully implemented a similar feature, resulting in a 30% increase in user satisfaction. ✔My Plan: - Develop the backend using Node.js and Nest.js. - Adapt the Angular Ionic frontend to integrate seamlessly with the new functionality. - Implement the drag-and-drop editor for timeline configurations. - Ensure AWS S3 integration for secure data storage. - Conduct thorough testing, including Jest unit tests and edge case scenarios. Regards, Davide

@GameOfWords

Guarantee Overlay Backend & Frontend Development I’m a full-stack software engineer with expertise in React, Node.js, Python, and cloud architectures, delivering scalable web and mobile applications that are secure, performant, and visually refined. I also specialize in AI integrations, chatbots, and workflow automations using OpenAI, LangChain, Pinecone, n8n, and Zapier, helping businesses build intelligent, future-ready solutions. I focus on creating clean, maintainable code that bridges backend logic with elegant frontend experiences. I’d love to help bring your project to life with a solution that works beautifully and thinks smartly. To review my samples and achievements, please visit:https://www.freelancer.com/u/GameOfWords Let’s bring your vision to life—connect with me today, and I’ll deliver a solution that works flawlessly and exceeds expectations.

@Ivanor1505

Hello. You need a NestJS backend plus an Ionic Angular overlay that enforces timed selfie, outfit, video, and background location to decide refunds, with auto-forfeit when steps fail. The main risk is state drift across timezones, offline resumes, and permissions, because one wrong transition breaks trust and disputes. Because of that I lock schemas and a single timeline engine first, then wire the existing overlay UI to it with UTC scheduling, distance/ETA adjustments, “leave now” alerts, and the +5min message extension rules. Media capture stays front camera with the required reticle copy, uploads to S3 with least privilege, and AWS SNS drives reminders with configurable sounds and haptics. I’ve shipped similar compliance overlays where missed background permissions caused silent failures, so I validate flows with Jest edge cases and <2s load targets, then deliver decoupled APIs and a clean admin timeline editor.

@panroman50

Hello Nick, ⭐️⭐️⭐️I'll do my best.⭐️⭐️⭐️ I've carefully reviewed your project description and believe my skills and experience perfectly fit your needs. I have 10+ years of experience on JavaScript, Angular and am highly skilled in delivering high-quality results. I am committed to working diligently and exclusively on your project to ensure its success. Please contact us via chat for a more detailed consultation. Thank You Roman

@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.

@mobimubasir

Hello. I read your requirement i will do that. Please come on chat we will discuss more about this. I will waiting your reply

@abdf2010

Hello there, I reviewed your project Guarantee Overlay Backend & Frontend Development -- 3 and understood the requirements at a high level. I focus on delivering clear, stable, and maintainable solutions aligned with the actual scope, I can work with JavaScript, Angular and follow a clean development process with proper structure and error handling. If this aligns with what you’re looking for, please come to chat to discuss further. Best regards

@uzzairkhan

You need a reliable Guarantee Overlay built to verify event attendance and manage refunds. I will develop a Node.js/Nest.js backend and integrate it with your existing Angular Ionic frontend. This approach delivers the timeline configurability, data collection, and user interactions you specified, including LLM flagging and AWS S3 storage. This covers the described functionality. Any deviations from the requirements document will be communicated immediately. Recently, I built a similar verification system for a location-based service, improving user compliance by 15%. Can you confirm the preferred AWS region for S3 bucket creation?

@Ahmedyar547005

Hey , I just went through your job description and noticed you need someone skilled in Angular and JavaScript. That’s right up my alley. You can check my profile — I’ve handled several projects using these exact tools and technologies. Before we proceed, I’d like to clarify a few things: Are these all the project requirements or is there more to it? Do you already have any work done, or will this start from scratch? What’s your preferred deadline for completion? Why Work With Me? Over 180 successful projects completed. Long-term track record of happy clients and repeat work. I prioritize quality, deadlines, and clear communication. Availability: 9am – 9pm Eastern Time (Full-time freelancer) I can share recent examples of similar projects in chat. Let’s connect and discuss your vision in detail. Kind Regards, Zain Arshad

@NazarKanteruk

Hi there! Your Guarantee Overlay concept sounds seriously innovative and empowering for event meetups. I'm excited about building the robust Node.js/Nest.js backend and seamlessly adapting your polished Angular Ionic frontend—especially for timed verification, drag-and-drop timelines, and secure AWS S3 media flows. The gamified FAB, live notifications, and admin configurability are right up my alley. Let’s make your app’s trust signals stand out and deliver a flawless, fast experience. Ready to get started and bring this vision to life!

@Zawiya3

With my extensive proficiency in various programming languages including a deep understanding of JavaScript, I believe I am the perfect fit for your Guarantee Overlay Backend and Frontend Development project. My solid experience in backend development using Node.js and frontend development using Angular Ionic aligns perfectly with your requirements. I have a robust background in implementing drag-and-drop interfaces, making me well-suited to building your timeline configurability features. I'll ensure that the adjustments related to meetup distance and "leave now" alerts based on location vs. ETA are seamlessly integrated. Efficient data collection is also one of my fortes as I've worked diligently with AWS S3, guaranteeing minimal permissions while storing media securely. Moreover, My penchant for detail-oriented tasks renders administration, testing, and showcasing of the project as flawless milestones, along with incorporating gamification elements like progress badges ensuring trust signals for users. In closing, my skills in AWS along with my knack for backend APIs would ensure future-proofing and reusability of the project, making it an even wiser investment for your business. By selecting me, you'll gain a diligent professional who will meet your 99% uptime and AA accessibility metric goals while coding anefficient,_

@lazarr4

Hello , I have extensive experiences in Angular and JavaScript. I understand what you need. I know what the difference between 99% and 100% is. I promise the perfect result. If you hire me, I will do my best until you are fully satisfied. You might review my past experience here. Regards

@DngPhgNam

✅Hi there, hope you are doing well! I have extensive experience developing both backend and frontend systems, including building a similar overlay feature for event management that involved real-time data collection and user verification. The most important aspect for this project is ensuring seamless integration between the Node.js backend and Angular Ionic frontend, which is crucial for the user experience and data accuracy. I will deliver a fully functional Guarantee Overlay that collects user data accurately while adapting existing front-end components for a smooth interface. I'd like to work on this project sincerely from my confidence. Let's connect and discuss more.

@brayanstiven5

Hi Nick V.. I am very excited with your project because I have completed similar project recently. The skills required for your project are my main specialty. I can handle this perfectly and have abundent experiences. Please confirm that I am one of the best fits for you and drop me a message for further discussion. Thanks and Best Regards. Brayan Stiven A.