Lead Full-Stack Developer – Autonomous AI & Live Commerce Ecosystem (Serbia)

@Microlent

Hello! This architecture is ambitious but executable within structured sprints if we stay disciplined around scope and cost controls. I can lead the full-stack implementation across FlutterFlow (exported Flutter), Firebase (Blaze), GPT-4o-mini + Pinecone, and Serbian fintech integrations with production-grade Cloud Functions orchestration. Here’s how I’d approach it: • Agent layer: Three autonomous agents driven by Firestore state documents + event-triggered Cloud Functions (idempotent, circuit-breaker protected) • Kill-switch: Firestore-based quota flags + budget thresholds + API guard middleware to prevent runaway OpenAI/Agora costs • IPS QR: Generate NBS-compliant pipe-delimited payload server-side, validate schema, then encode as QR (strict field ordering + checksum validation before render) • Vision optimization: Batch processing, aggressive prompt compression, image downscaling to minimal viable resolution, deduplicated embeddings, and staged async queueing to stay under $1 target • CorvusPay → Fiscal flow: Webhook-verified payment → signed verification check → immediate ESIR API call → receipt ID persisted atomically with transaction log • Escrow-ready design: Abstracted payment service layer so settlement routing can shift to OTP Banka without refactoring core commerce logic Sprint plan (21 days): 1️⃣ Core marketplace + AI agents 2️⃣ Serbian fintech + fiscalization 3️⃣ Live commerce + logistics integrations Best regards, Jasmin

@irsolutions

With over a decade of experience in web and mobile development, I understand the key requirements of your project seeking a Lead Full-Stack Developer for an Autonomous AI & Live Commerce Ecosystem in the Serbian market. The core challenge lies in building a next-generation marketplace platform driven by autonomous AI agents and live commerce integration. In my past projects, I have successfully developed AI-driven solutions in various domains, including fintech and eCommerce, aligning with the core objectives of your project. My expertise in blockchain technology further enhances my ability to deliver innovative solutions tailored to your specific needs. To ensure successful implementation of your project, I am ready to discuss further details and provide insights on how I can bring your vision to life. Feel free to reach out and let's dive deeper into how we can collaborate for the success of your project.

@OutsourceMan

⭐⭐⭐⭐⭐ We at CnELIndia, led by Raman Ladhani, are fully equipped to deliver your Lead Full-Stack Developer project for the Serbian Autonomous AI & Live Commerce platform. Leveraging our expertise in Flutter/Dart, Firebase, Node.js, and OpenAI GPT--mini, we can implement autonomous AI agents for Marketing, Sales, and Logistics, while ensuring real-time dashboard configurability for B2B/B2C operations. Our team has hands-on experience integrating fintech solutions like NBS IPS QR codes, CorvusPay, and automated e-fiscalization workflows. For multi-logistics hubs, we will integrate PostExpress APIs with webhook support for secondary couriers. Cost-efficient bulk AI image processing and Firestore-based kill-switch mechanisms will secure operations. We will structure the project into three 7-day sprints, ensuring delivery within 21 days, and provide robust escrow-ready architecture with full compliance and security. Raman Ladhani will oversee all technical and delivery milestones to guarantee successful completion.

@n2rtechnologies

Hello, I am excited about the opportunity to lead the development of your Autonomous AI & Live Commerce Ecosystem tailored for the Serbian market. My extensive experience in creating scalable SaaS solutions and e-commerce platforms ensures that I can deliver a robust architecture that meets your business needs. I understand the importance of seamless integration for CRM functionalities and automation processes to enhance user engagement. I am particularly focused on delivering a user-friendly interface and optimizing the overall user experience within your live commerce framework. My goal is to ensure that the platform not only meets your expectations but also exceeds them in terms of performance and reliability. Let's discuss how I can contribute to the success of your project. Regards, Nurul Hasan

@eclairios

Hello, Your project for a next-generation marketplace in Serbia, driven by autonomous AI agents and live commerce, presents an exciting challenge. I'm adept at creating 'Zero-Input' user experiences, integrating advanced AI, and handling the specific technical stack you've outlined for the Serbian market. I’m Waqas from Eclairios, a professional software engineer with over 7 years of experience in app and web development. I have successfully completed 128 projects, earning a 5.0 rating from satisfied clients. I specialize in mobile apps (Android, iOS, Flutter), website development, custom APIs, and backend solutions. My goal is to deliver high-quality, scalable solutions that meet your business needs. Why hire me? ★ 100+ Projects Completed with 5-star rating. ★ 3 months of free post-launch support ★ Expertise in advanced technologies and systems 1. I'll use a Node.js Firebase Cloud Function to precisely format the pipe-delimited string for NBS IPS QR, strictly following Serbian data standards, encoding, and order before API submission. 2. I'll pre-process images (resize/compress) client-side before upload. For Vision API, I'll use minimal resolution, concise prompts, and implement batch processing with a Firestore circuit breaker to manage costs under $1.00. 3. Upon CorvusPay's successful transaction confirmation webhook, a Firebase Cloud Function will immediately trigger. It will call the chosen ESIR provider's API (Teron/NetRačuni) with transaction data to generate and record the automated fiscal receipt. Let’s connect and discuss how I can help you with your project. Best regards, Waqas

@kamran2012

Hi there, I will build your Serbian marketplace platform with the autonomous AI agent system, FlutterFlow native export, Firebase backend, Agora live commerce streaming, and the full Serbian fintech stack including NBS IPS QR, CorvusPay, and automated e-fiscalization through Teron or similar ESIR providers. For the three AI agents (Marketing, Sales, Logistics), I will use Firestore state documents as you described, with Cloud Functions acting as the orchestration layer. Each agent will operate within configurable bounds set through your admin dashboard, so the Sales agent negotiates discounts only within the range you define without requiring manual approval for every interaction. Questions: 1) For the NBS IPS QR integration, do you already have a banking partner providing the API credentials, or does that need to be arranged? 2) What is the target launch timeline for the Serbian market? Send me a message and we can go over the details. Best regards, Kamran

@badarmadni927

Hi, What specific challenges are you anticipating while building the autonomous AI agents for your marketplace? I’ve extensive experience in developing full-stack applications, particularly with Firebase and Flutter, ensuring seamless integration of AI components. I can help architect the dynamic admin dashboard and optimize the NBS IPS QR code generation criteria. Having worked on projects involving complex integrations and automation using Firebase Cloud Functions, I’m confident in handling your requirements effectively. My approach includes creating a fail-safe system for budget control and ensuring compliance with Serbian financial regulations. Given the timeline of 21 days, I can deliver quality features in the proposed sprints. Let me know how you’d like to proceed! Best, Badar Madni

@Julian29

Hello, HAVE HANDS-ON EXPERIENCE WITH SUCH PROJECT I have 15+ years of proven experience in full-stack development, AI-driven marketplaces, and real-time commerce ecosystems, and I fully understand your requirement to deliver a zero-input, autonomous AI & live commerce platform tailored for the Serbian market. The goal is to create a scalable, secure, and fully automated marketplace where AI agents drive sales, logistics, and marketing while integrating local fintech and compliance systems. -->> Autonomous AI agents (Marketing, Sales, Logistics) -->> Dynamic admin dashboard for real-time pricing & commissions -->> Serbian fintech integration (NBS IPS QR, CorvusPay, e-fiscalization) -->> Multi-logistics hub with PostExpress & BEX webhooks -->> Bulk AI-powered inventory upload & analytics via GPT-4o-mini Vision I follow a clean, modular architecture with secure Firestore rules, optimized Cloud Functions, and agile iterative sprints to ensure operational safety, low latency, and cost-efficient AI operations. in chat as I have some queries regarding specific fintech APIs, discount bounds for AI negotiations, and logistics webhook priorities to proceed further. I would approach your project by first implementing the Core AI Agent system and Firestore architecture, then integrating fintech and live commerce modules in parallel sprints, followed by rigorous testing and cost optimization. Thanks & regards Julian

@corpmember29

Hello, I have carefully reviewed your technical brief and understand the requirement to build an autonomous AI-driven marketplace tailored for the Serbian market using FlutterFlow (exportable Flutter), Firebase Blaze, GPT-4o-mini + Pinecone, and Agora low-latency streaming. With 10+ years of experience in full-stack development, AI automation, fintech integrations, and scalable Firebase architectures, I can implement your three-agent system (Marketing, Sales, Logistics) using Firestore state-driven orchestration and Cloud Functions with cost-controlled execution and circuit breakers. For NBS IPS QR, I will generate strictly compliant pipe-delimited payload strings per Serbian standard before QR encoding and validate checksum logic server-side. For bulk Vision uploads (1,000+ items), I will batch, compress, deduplicate, and pre-process metadata to minimize token/image calls and stay within the cost constraint. CorvusPay confirmations will trigger secure webhook-based Cloud Functions to immediately generate and send ESIR-compliant fiscal receipts with transactional logging. The system will be escrow-ready, modular, and fully configurable via dynamic admin controls without redeployment. I WILL PROVIDE 2 YEAR FREE ONGOING SUPPORT AND COMPLETE SOURCE CODE. WE WILL WORK WITH AGILE METHODOLOGY AND WILL GIVE YOU ASSISTANCE FROM ZERO TO PUBLISHING ON STORES. I eagerly await your positive response. Thanks.

@Fazeennazar

Hello, I’m a senior full-stack developer with strong experience building AI-driven SaaS platforms using Flutter, Firebase, OpenAI APIs, and real-time event-driven architectures. I have delivered production systems using Firestore, Cloud Functions (Node.js), Stripe-like payment flows, vector search (Pinecone), and low-latency streaming integrations, and I am comfortable leading complex multi-module builds under tight timelines. For the Autonomous AI Agent System, I would implement state-driven agents using Firestore documents as deterministic state machines, with Cloud Functions acting as controlled orchestrators and built-in cost guardrails. The dynamic Enterprise Admin Dashboard will be fully data-driven, with subscription tiers, commissions, token pricing, and logistics fees stored in configurable Firestore collections to allow real-time updates without redeployment. For NBS IPS QR generation, I will implement strict pipe-delimited payload construction according to the Serbian IPS specification, validate field ordering and encoding, and generate the QR using a compliant encoding library before rendering it client-side. To optimize GPT-4o-mini Vision for 1,000+ image uploads under $1.00, I would batch process images, aggressively compress and resize before inference, use structured prompts with minimal tokens, cache embeddings/results, and avoid re-processing unchanged inventory. Thanks

@technologybeach

I'm thrilled to introduce myself as the prime candidate for your project. Having successfully architected and developed numerous high-performing digital platforms, I possess a robust understanding of Full-Stack development combined with expertise across various technologies. My comprehensive skillset in Java, Node.js, and PHP, aligns seamlessly with your technical stack requirements and will enable me to architect an optimized and efficient ecosystem for your marketplace tailored to the Serbian market. My proficiency in AI integration will be invaluable in realizing the "Zero-Input" user experience you envision. From developing autonomous AI agents to implementing OpenAI GPT-4o-mini for advanced Vision & NLP processes and Pinecone for Semantic/Vector search, I have a proven track record of driving innovation through AI integration. Combining this with my extensive knowledge of backend development using Firebase Blaze Plan (Firestore, Auth, Cloud Functions) and Node.js orchestration skills, I assure you of a swift yet enduring solution implementation. Moreover, my adaptability extends beyond innovative technology implementations; it encompasses flexible business models too. As showcased in my profile, my experience spans across diverse industries including CMS & E-Commerce development.

@khurshid040462

Hi there, I’m thrilled to have the opportunity to apply for the Lead Full-Stack Developer role focusing on the Autonomous AI & Live Commerce Ecosystem for the Serbian market. With extensive experience in Java, PHP, and SaaS solutions, I am well-prepared to tackle the unique challenges presented by this project. I have successfully developed complex platforms using Flutter for frontend development and Firebase for backend solutions, ensuring efficient user experiences. The integration of OpenAI GPT-4 for AI-driven functionalities aligns perfectly with my background in AI and automation. I am confident in my ability to implement the dynamic features and secure infrastructure you require within the timeline of 21 days, divided into three sprints. Additionally, I will ensure compliance with local regulations through seamless integration with the Serbian fintech landscape. Let’s discuss how my skills align with your vision for this groundbreaking project. Best regards,

@abhisaini0188

As a seasoned Senior Full-Stack Developer, I have spent the past decade honing my skills which align perfectly with your project requirements. My experience with FlutterFlow (and Dart export capabilities) for front-end development make me an ideal partner for your platform creation needs. In addition, my extensive work with the Firebase Blaze Plan stack - Firestore, Auth, and Cloud Functions specifically - gives me a unique advantage in navigating your envisaged autonomous AI ecosystem. Moreover, I have a solid background in building and leveraging AI agents - be it Marketing, Sales, or Logistics. This has successfully allowed me to incorporate automated listing optimization and handle real-time sales negotiations within set discount bounds. On the flip side, bulk content optimization is an area where my expertise in handling open API optimally can prove highly beneficial - ensuring each of your 1,000+ image uploads is handled thoughtfully while saving costs. Finally, my experience extends beyond just coding. Being adept at project management, scalability planning, and maintaining thorough communication lines means I can navigate complex multi-layered projects such as yours deftly while keeping you apprised at every stage. Let's build an ecosystem that demonstrates the true power of AI automation while supporting real business growth for your project! With Regards!

@vishal1145

Your AI agents will fail if they don't have proper state management and cost controls. I've seen similar autonomous systems rack up $3K in OpenAI charges overnight because there was no circuit breaker logic between Firestore triggers and GPT-4 calls. Before architecting the solution, I need clarity on two things: What's your expected transaction volume per day once you launch (50 orders or 500)? And does your Firebase Blaze plan have spending alerts configured, or are you relying entirely on the kill-switch logic I'll build? Here's the architectural approach: - OPENAI GPT-4O-MINI OPTIMIZATION: Implement batch processing with image compression (WebP at 85% quality) and caching layer in Firestore to avoid re-analyzing duplicate products. For 1,000 images, I'll use async queues that process 50 at a time with exponential backoff, keeping costs under $0.80. - NBS IPS QR GENERATION: Build a Cloud Function that constructs the pipe-delimited payload (K:|V:|C:|R:|N:|I:|P:|SF:|S:) per NBS spec, validates checksum logic, and generates the QR using a lightweight library. I'll include fallback handling for special characters in Cyrillic merchant names. - AGORA + FIREBASE INTEGRATION: Set up token-based authentication where Flutter clients request short-lived Agora tokens from Cloud Functions. I'll implement viewer count tracking via Firestore real-time listeners and automatic stream termination after 4 hours to prevent billing overruns. - CORVUSPAY FISCALIZATION FLOW: Use Firestore transaction writes to ensure atomicity - payment confirmation triggers a Cloud Function that calls your ESIR provider's API, stores the fiscal receipt URL, and updates order status in a single operation. If fiscalization fails, the payment gets flagged for manual review. - AUTONOMOUS AGENT STATE MACHINE: Each agent (Marketing/Sales/Logistics) runs as a scheduled Cloud Function with Firestore-based state documents. I'll implement mutex locks using Firestore transactions to prevent race conditions when multiple agents try to modify the same listing. I've built three SaaS platforms with similar AI automation layers that scaled to 10K users without breaking Firebase quotas. The €1,300 budget is tight for this scope - let's discuss which modules are MVP vs Phase 2 before I commit to the 21-day timeline.

@Apurva510

Hello, I have carefully reviewed your requirements and understand this is a high-complexity, AI-driven marketplace platform tailored for the Serbian market, combining autonomous agents, fintech compliance, live commerce, and logistics integrations all within a 21-day structured sprint plan. I have strong experience building Firebase + Cloud Functions (Node.js) architectures, AI-driven workflows using GPT models, vector search integrations, and payment-compliant marketplace systems. I’m comfortable working with Flutter (including exportable architectures), Firestore state orchestration, and designing cost-controlled AI systems with safeguard mechanisms. I am comfortable working under NDA and structured sprint delivery. I am available for an initial technical discussion to align on architecture and risk mitigation before sprint kickoff. Looking forward to your response. Best regards, Apurva

@mrabdullahsaigal

Hi, We can deliver your 21-day AI-powered marketplace using FlutterFlow + exported Flutter, Firebase (Firestore + Cloud Functions), GPT-4o-mini with Pinecone, and Agora for live commerce. AI agents will run via Firestore state triggers with discount limits and kill-switch cost controls. NBS IPS QR will follow the official pipe-delimited format with validation logic, bulk Vision uploads will use batching + compression to minimize API cost, and CorvusPay confirmations will trigger automated ESIR fiscalization via secure webhooks. The system will be escrow-ready, admin-configurable, and delivered in three focused sprints within budget. Best Regards, Gensols Dev

@zainalitariq245

I have carefully reviewed your project details I can't write too long proposal because there is character limit for me I will give you all the answers of your questions and ready to discuss your project in detail with you so let's connect with me. Hello Dear, I am highly experienced full-stack developer with a strong track record of delivering high-quality, reliable, and scalable applications across web and mobile platforms. I can build your autonomous AI powered live commerce marketplace for the Serbian market using FlutterFlow, Firebase Blaze, OpenAI GPT 4o mini, Pinecone, and Agora with full native export support. I will implement the Marketing, Sales, and Logistics AI agents with Firestore orchestration, create a dynamic enterprise admin dashboard, integrate NBS IPS QR, CorvusPay, ESIR fiscalization, PostExpress, and BEX, and deliver scalable B2B SaaS features with secure kill switch protection and escrow ready architecture, fully aligned with your technical brief and NDA requirements. Please Take a Look at My Professional Portfolio: https://www.freelancer.pk/u/zainalitariq245 I look forward to your response. Best Regards, Zain

@mahig47

Hello! As per your project post, you’re looking to build an Autonomous AI powered live commerce marketplace for the Serbian market using FlutterFlow and Firebase, featuring AI agents, live streaming commerce, fintech integrations, and a dynamic admin system. The goal is to create a fully automated, scalable ecosystem that enables businesses to sell, manage logistics, and optimize sales with minimal manual input. My focus will be on delivering the platform featuring: FlutterFlow based mobile and web apps with Firebase backend, autonomous AI agents for listing optimization, negotiation, and logistics, live commerce streaming with real time interaction, enterprise admin dashboard for subscription and commission control, and fintech and logistics integrations with analytics. The system will ensure scalability, automation reliability, and operational safety. I specialize in building AI driven marketplace platforms using Flutter, Firebase, Node.js, and OpenAI integrations, with focus on scalable architecture, automation control, and secure fintech workflows. My focus will be on delivering a production ready, escrow ready, and cost controlled autonomous commerce ecosystem. I am confident I can deliver a scalable and future ready AI powered live commerce platform aligned with your technical brief. Best regards, Nikita Gupta.

@johnallenvillan1

Hello, I am an expert Lead Full-Stack Developer with a strong background in PHP, SaaS, GPT-4, Flutter, Java, and more. I have successfully implemented complex projects similar to yours. I will meticulously develop the autonomous AI agent system, dynamic enterprise admin dashboard, integrate Serbian fintech & compliance, set up a multi-logistics hub, and implement advanced B2B SaaS features with precision. Let's start this transformative journey together! What specific timeline are you envisioning for the project?