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Hei — jeg kontakter deg fordi jeg bygger noe som ikke kan bygges av vanlige utviklere. Jeg bygger LOOP: et AI‑drevet trygghetslag for bruktmarkedet. Tenk Stripe for Trust — et API som analyserer adferd, risiko og transaksjoner i sanntid. The Full-Stack Engineer at LOOP builds three core things: ⭐ 1) The Dashboard Marketplaces Use Every Day This is LOOP’s external face — the product customers interact with daily. * Risk score visualization * User profiles * Transaction analysis * Behavioral data insights * Alerts * Admin panel ⭐ 2) Integrations with the Risk API The Full-Stack Engineer connects the frontend to: * Analysis endpoints * Scoring endpoints * Explanation endpoints * The TryggBot engine ⭐ 3) TryggBot UI + Onboarding Flows This is what makes LOOP feel “alive” for users. * Chat UI * Trust score explanations * Step-by-step flows * Micro-interactions * Animations ? Skills the Role Requires: The Full-Stack Engineer must be a builder, not just a “feature factory” developer. They should be comfortable with: * React / [login to view URL] / Vue (frontend) * Node.js / Python / Go (backend) * API design * Authentication & security * Database design (Postgres, MongoDB, etc.) * Fast iteration * Working independently ? What Makes This Role Unique at LOOP: This is not a typical developer role. This is a core builder position with: * 1–3% equity * Full autonomy * Direct influence on the product * Zero bureaucracy * The opportunity to help build global infrastructure * Close collaboration with the founder and CTO This is the role that shapes LOOP’s product experience. ? Why Top Candidates Will Love This Role: Top full-stack engineers at companies like Schibsted, Meta, Vipps MobilePay, Klarna, and consulting firms love: * Building things that people actually use * Working closely with a founder * Having ownership * Moving fast * Escaping corporate slowness * Building something with global potential. LOOP gives them all of that.
Project ID: 40446620
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150 freelancers are bidding on average $1,177 USD for this job

With over a decade of experience in full-stack architecture and high-scale systems, I understand your need for a Fullstack Engineer to build LOOP: an AI-driven safety layer for the used market. As someone who has successfully built and scaled high-complexity systems, such as serving over 1 million users, I am confident in my ability to tackle the unique challenges of your project. A strategic insight I can provide is to implement a modular architecture that allows for easy scalability and maintenance as the project grows. With my background in developing high-security FinTech solutions, I am well-equipped to ensure that LOOP is not only efficient but also secure. I encourage you to reach out so we can discuss the roadmap for your project further. Let's work together to bring your vision of LOOP to life.
$1,200 USD in 20 days
7.5
7.5

Hi. In your project description you mentioned real time risk and behavior checks, and building the whole system from scratch, and both need careful handling. The best way to do this is to start with a simple core API service with clear endpoints, then add a streaming risk engine that scores each event fast, with strong logs and tests so we can trust every decision. I'll also take care of workflow of database design for events and users, auth and API keys for partners, and a clean dashboard to review flags and false positives. If you'd like, I can outline the cleanest architecture for this so it scales smoothly without future rebuild. I keep comms simple and frequent, focus on quality, save you time, and help you ship faster so it can start making revenue. I can stay on after delivery for support and next features. Let me know if you'd like me to break this down clearly. Regards, Nick.
$750 USD in 6 days
7.1
7.1

SKIP.
$750 USD in 28 days
6.8
6.8

Hi, — the concept of a real-time AI-driven trust layer for the used goods market is compelling and technically challenging. The core engineering risk lies in orchestrating reliable, low-latency behavior and risk analysis at scale. I usually structure such systems by separating ingestion, real-time analysis, and API response layers to isolate concerns and optimize performance. I've built several AI-driven platforms with autonomous decision modules and real-time workflows, notably the AI-Driven Marketing Suite Development -- 2, which involved continuous content optimization and decision-making pipelines. I recommend designing a modular architecture that decouples data ingestion from risk scoring and transaction validation, allowing scaling and iterative improvements without disrupting core flows. Ensuring reliability will require embedding confidence thresholds and fallback mechanisms for risk assessments, combined with monitoring and evaluation logic to maintain trustworthiness over time. Systems like these must be production-ready from day one, with maintainability and extensibility prioritized to handle evolving market conditions and data sources. I can help outline the ingestion and analysis pipeline, map out the API orchestration flow, and review the architecture to balance latency, scalability, and reliability. Thanks, Hercules
$1,500 USD in 7 days
6.5
6.5

Hi, Jeg vil bygge LOOP sitt kjernesystem — AI-risikoanalyse-API, sanntids transaksjonsovervåking og adferdsscoring-motor. Arkitektur og kode, levert som en builder. For sanntidsanalysen vil jeg sette opp en event-driven pipeline med asynkron scoring — slik at hvert API-kall returnerer risikovurdering uten å blokkere transaksjonsflyt. Det gir lav latens selv under høy last, noe som er kritisk når dette skal fungere som et tillitslag andre plattformer integrerer mot. Spørsmål: 1) Har du definert hvilke datapunkter som skal mate risikomodellen — brukerhistorikk, enhetsdata, transaksjonsmønstre? 2) Skal API-et deployes på en spesifikk skyplattform, eller er det åpent? Budet er et første estimat — jeg bekrefter endelig kostnad og tidslinje når vi har gått gjennom de fullstendige kravene sammen. Looking forward to discussing further. Best regards, Kamran
$845 USD in 13 days
6.0
6.0

Hi there, I specialize in building innovative AI-driven solutions like LOOP. With expertise in Full Stack Development, I focus on creating robust systems from scratch. My recent projects include AI-driven platforms for financial automation and SEO ranking. Let's discuss how I can bring your vision of a trust-based API to life. Looking forward to collaborating on this exciting project. Best, Kausar | Full Stack Developer
$999 USD in 14 days
6.2
6.2

Having built a career specializing in AI-driven platforms, cloud infrastructure, and modern web dashboards, I am confident in my ability to tackle the unique demands of LOOP's Full-Stack Engineer role. Throughout my tenure, technology development has always been about building products that people actually use and enjoy. Embracing a clean architecture approach and promoting scalability, I can help enhance LOOP's risk score visualization, user profiles, transaction analysis, behavioral data insights, alerts, and administration panel. My proficiency in Python, FastAPI, React and Node.js will aid me in establishing reliable API integrations with your risk API and creating an engaging TryggBot UI.
$1,500 USD in 60 days
5.6
5.6

Hello, I have 4 years of experience in Full Stack Development, specializing in building robust systems from scratch. I have a strong background in Software Development and AI Consulting, making me well-equipped for your LOOP app project. I understand your need for an AI-driven trust layer for the used marketplace, akin to Stripe for Trust. I am confident in my ability to provide a professional and efficient solution tailored to your project requirements. I have carefully reviewed the project description and believe I can deliver exceptional results. Let's discuss your project further in the chat to explore how I can contribute to the success of LOOP. Best regards, Taimoor from Pixels Soft Let's connect in chat for more detailed discussions.
$800 USD in 7 days
5.0
5.0

✋ Hi There!!! ✋ The Goal of the project:- BUILD A FULLSTACK AI-DRIVEN TRUST LAYER FOR THE SECOND-HAND MARKET THAT ANALYZES BEHAVIOR, RISK, AND TRANSACTIONS IN REAL TIME. I have carefully read and understood your need for a hands-on builder to create new systems from scratch rather than maintaining legacy code. I am the best fit for this project because I bring strong fullstack development skills with 9+ years experience and a proven record of building scalable AI-integrated platforms. I can design the LOOP app architecture, develop AI-driven risk analysis modules, and implement secure APIs. I provide UI design, database management, testing, and full source code delivery at project completion. I have successfully delivered similar AI-integrated fintech and marketplace systems. Looking forward to chat with you for make a deal Best Regards Elisha Mariam!
$751 USD in 11 days
4.9
4.9

Hello, I am reaching out to you regarding your project to develop the LOOP app with a focus on coding and architecture. I understand that you are looking for a Fullstack Engineer who is dedicated to building new systems from scratch, rather than just maintaining existing code or attending meetings. LOOP, an AI-driven safety layer for the used market, aims to revolutionize trust with real-time analysis of behavior, risk, and transactions - similar to Stripe for Trust. As someone who values hands-on development and innovation, I am confident in my ability to bring your vision to life. With my expertise in Full Stack Development, AI Chatbot Development, and AI Model Development, I am well-equipped to tackle the challenges of this project. I am excited about the opportunity to work together and contribute to the success of LOOP. Best regards, Jayabrata Bhaduri
$1,500 USD in 7 days
4.1
4.1

Hello, I am Vishal Maharaj, with 20 years of experience in Software Development, Full Stack Development, AI Development, AI Model Development, AI Chatbot Development, and AI Text-to-text. I have carefully reviewed your project description for the LOOP app and its architecture. I am committed to building innovative systems from scratch and not just maintaining old code. I will leverage my expertise in AI-driven solutions to develop the LOOP app as per your requirements. Let's discuss further details and initiate the chat to explore how we can collaborate effectively on this project. Cheers, Vishal Maharaj
$1,000 USD in 10 days
5.3
5.3

Hei! I understand you're seeking a dedicated Fullstack Engineer to build LOOP, an AI-driven trust layer for the used market. You need someone to build new systems from the ground up. I'm Taiwo, a UK-based Senior Software Developer with 10 years of experience building scalable applications for companies like IBM, UK Government, BMW and Sky. My background in Cyber Security and Applied Computer Science gives me a unique perspective on building secure and reliable platforms. I enjoy greenfield projects. With my experience, I can develop a robust backend API (potentially using Python/Django or FastAPI), integrate AI-driven risk analysis, and build a user-friendly interface, ensuring scalability and security throughout. Relevant projects: ⏺ GitSecure - built a tool that finds, prioritizes, and fixes vulnerabilities in real-time before they become threats to your code and cloud ⏺Equity Share - built backend functionality for a US real estate crowdfunding platform with a focus on secure, scalable application logic. My approach would involve understanding your specific requirements, developing the core API logic, integrating with relevant data sources, and building a robust testing and deployment pipeline. If you are interested, I am available to start immediately.
$1,125 USD in 12 days
4.2
4.2

Hi, this is Kris from McKinney, Texas, I've reviewed your project requirements and understand that you are working on developing LOOP, an AI-driven safety layer for the used marketplace. The key challenge here seems to be creating a real-time API that can analyze behavior, risk, and transactions effectively. My approach to completing this project would involve starting from scratch to build robust and efficient systems that align with the unique needs of LOOP. By focusing on innovation and customization, I aim to deliver a solution that meets your specific requirements while ensuring seamless integration with your existing infrastructure. A few additional questions: Q1: What technology stack are you currently using for this project? Q2: Do you have any specific design preferences or requirements for the user interface? Q3: Have you identified any potential scalability issues that need to be addressed during the development process? Best regards, Kris Kramer
$750 USD in 3 days
4.7
4.7

Hi, With my extensive 15+ years of experience in software application development, I ensure that your LOOP app will be built to the highest standard. Having worked with giants like Avaya, CGI, Meta-io, I'm well-versed in problem-solving and system design, which are crucial for building high-performance, low-latency systems like what you seek. What distinguishes me is my specialization in AI and ML, skills that will be of immense value to developing an AI-driven app like LOOP. My know-how in algorithmic trading, AI-driven signal generation, and predictive analytics align flawlessly with your project goals. Moreover, my competency with Python, TensorFlow, PyTorch, Scikit-Learn and experience with event-driven and distributed systems mean I can help create an app capable of handling complex real-time workloads proficiently. Beyond technology expertise; I have a broader understanding of business. I don't just develop features; I build full-fledged products that people actually use. In line with this role, I've deployed several mobile applications involving real-time data (similar to what's needed for the LOOP app) and executed excellent digital marketing campaigns to drive user-engagement. Overall, my rich experience would ensure the successful delivery of your LOOP app while collaborating effectively with you. Choose me for a rewarding partnership where one plus one is designed at being so much more than two!
$1,125 USD in 30 days
4.2
4.2

⭐⭐⭐⭐⭐ Build Innovative Solutions as a Full-Stack Engineer at LOOP ❇️ Hi My Friend, I hope you're doing well. I've reviewed your project details and see you are looking for a Full-Stack Engineer for LOOP. You need someone who can build unique solutions, and Zohaib is here to help! My team has successfully completed 50+ similar projects focused on full-stack development. I will create the dashboard, integrate the Risk API, and design the TryggBot UI, all while ensuring a smooth user experience. ➡️ Why Me? I can easily handle your project as I have 5 years of experience in full-stack development, focusing on React, Node.js, and API design. My expertise includes database design, authentication, and building responsive UIs. I am also comfortable working independently and iterating quickly to meet project goals. ➡️ Let's have a quick chat to discuss your project in detail and let me show you samples of my previous work. Looking forward to discussing it with you! ➡️ Skills & Experience: ✅ React ✅ Node.js ✅ Python ✅ API Design ✅ Database Design ✅ User Authentication ✅ UI/UX Design ✅ Fast Iteration ✅ Problem Solving ✅ Team Collaboration ✅ Agile Methodologies ✅ Frontend Development Waiting for your response! Best Regards, Zohaib
$900 USD in 2 days
4.9
4.9

Hi There!!! ★★★★ ( Build scalable AI-powered trust architecture for the LOOP marketplace ecosystem ) ★★★★ I carefully read your vision for LOOP, and honestly this sounds like the kind of product that needs real system thinking, not just basic app development. Building an AI-driven trust layer for secondhand marketplaces with real-time behavior, transaction, and risk analysis is both ambitious and exciting. Services mentioned here based on project details ⚜ Fullstack system architecture from scratch ⚜ AI-powered trust & risk analysis workflows ⚜ Real-time transaction monitoring systems ⚜ Frontend + backend product development ⚜ API architecture for scalable integrations ⚜ AI chatbot / text processing implementation ⚜ Startup-focused agile product building For LOOP, I would approach the platform with modular backend services, AI-assisted risk scoring, realtime analytics, and scalable cloud infrastructure. I’m more interested in building impactful products than sitting in endless meetings. Would love to hear more about your roadmap, current stack, and vision for LOOP. I think this could become something really powerful. Warm Regards, Farhin B.
$756 USD in 10 days
4.0
4.0

Hello, LOOP is exactly the kind of product I enjoy building. I have strong experience with full-stack development, scalable architecture, API integrations, AI-driven workflows, and modern frontend systems using React and Next.js. I can help build the full LOOP ecosystem including the dashboard, risk analysis integrations, TryggBot interface, onboarding flows, and backend architecture. I am comfortable working independently, moving fast, and contributing at both product and technical levels. For the frontend, I can create a modern and responsive dashboard with risk visualization, transaction analysis, alerts, admin controls, and smooth UI interactions. For backend and infrastructure, I can work with Node.js or Python, secure API design, authentication, database architecture, and scalable deployment workflows. I also have experience building AI-powered interfaces including chatbot systems, explanation flows, scoring systems, and real-time user interactions that feel intuitive and alive. What stands out to me about LOOP is the vision. Building trust infrastructure for marketplaces has huge global potential, and I like working closely with founders on products that require speed, ownership, and strong execution instead of corporate process.
$750 USD in 7 days
3.2
3.2

Hello, I appreciate the opportunity to connect regarding your exciting project, LOOP. Your vision for an AI-driven safety layer in the second-hand market is innovative, and I understand the importance of creating a robust API that effectively analyzes behavior and transactions in real-time. As a Fullstack Engineer with extensive experience in building scalable systems from the ground up, I am well-equipped to contribute to your project. My expertise includes working with modern frameworks and technologies like Node.js, React, and various database systems, ensuring seamless integration and performance. To successfully build LOOP, I propose the following approach: - Collaborate closely to define the core functionalities and user requirements. - Develop the API architecture to ensure real-time data processing and risk analysis. - Implement rigorous testing and optimization phases to enhance reliability and performance. - Maintain clear communication to adapt to any evolving project needs and deliver on time. I am eager to start building this transformative solution with you and am confident in delivering high-quality results. Let's discuss how we can bring your vision to life. I am available for a conversation at your earliest convenience.
$750 USD in 7 days
2.9
2.9

Hello there, I’m an independent full‑stack engineer who builds from scratch, focusing on robust architecture and scalable AI integrations. I’ve spent years shipping new systems for startups, with hands‑on work across frontend, backend, data pipelines, and AI model integration. I design reliable API layers, real‑time risk analysis, and modular microservices so you can iterate fast without legacy debt. In past projects I’ve built end‑to‑end AI chat and text workflows, real‑time decision engines, and secure transactional pipelines, always delivering deployable code and clear architectural choices rather than endless meetings. I’ll bring that builder mindset to LOOP, delivering clean, scalable architecture and production‑ready features from day one. I can take this from blueprint to production quickly, with a pragmatic plan and strict quality guardrails. Let’s align on scope and milestones, and I’ll share a concrete timeline. Best regards, Billy Bryan
$750 USD in 13 days
3.1
3.1

Hi, I am writing this bid myself because your project to create LOOP, an AI-driven trust layer for the used market, is exactly the kind of challenge I thrive on. It's clear you need a builder who can deliver innovative systems from scratch, not just maintain legacy code, and I am confident I can bring that vision to life. With extensive experience in full stack development and AI systems, my team excels at creating scalable and secure architectures tailored to real-time risk analysis and behavior monitoring. We will work closely with you to design and build your Stripe-for-Trust API efficiently and robustly. Let's discuss your specific requirements and timeline so we can get started on this transformative project within the next few weeks. Can you share more about the key behavioral signals and risk factors you want the LOOP API to analyze? Also, which technology stack do you envision for development? Thanks,
$750 USD in 3 days
2.2
2.2

Revetal, Norway
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