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We are a tech startup building a B2B SaaS platform that provides developers with API access to our proprietary, self-hosted AI models. Our core AI processing engine is already built, containerized, and runs locally on our servers. Your job is to build the customer-facing commercial wrapper around it from the ground up. We need a Lead Developer to deploy an open-source API management gateway (e.g., One API or New API), build a custom [login to view URL] web storefront, and implement a robust, hybrid Stripe billing system (Subscriptions + Prepaid). (Note: You will not touch the core AI machine learning code. Your focus is strictly the SaaS web application, the billing layer, and the reverse proxy infrastructure). Core Responsibilities: API Gateway & DevOps: Deploy an open-source API management gateway via Docker on our Ubuntu VPS. Configure Nginx as a reverse proxy to route traffic securely, ensuring our internal AI engine's ports are completely air-gapped from the public internet. The Web Storefront ([login to view URL]): Build a modern landing page, pricing page, and developer dashboard (using Tailwind CSS) where users can register, view their live token balance, manage their active subscriptions, and generate sk-... API keys. Hybrid Billing (Stripe Subscriptions & Prepaid): Implement a dual billing model. Subscriptions: Users can subscribe to monthly recurring plans (e.g., $49/mo for a set amount of API quota). You must handle Stripe customer portals, upgrades, downgrades, and cancellations. Pay-As-You-Go: Users can also make one-time top-ups to their wallet if they run out of their monthly subscription quota. Webhooks: Build highly secure Stripe Webhooks to accurately allocate, reset, or revoke token quotas inside the API Gateway when a subscription renews or a one-time payment is made. Data Syncing: Ensure the [login to view URL] app acts as a lightweight frontend, fetching live balances and API keys directly from the Gateway’s Admin REST API rather than building a duplicate wallet database.
ID do Projeto: 40318050
222 propostas
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Ativo há 25 dias
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222 freelancers estão ofertando em média $2.263 USD for esse trabalho

***** B2B SaaS API Platform (Gateway + Billing + Developer Dashboard) ***** I will build your complete SaaS wrapper platform include landing, pricing, and a dashboard where users can manage API keys, view live token balance (fetched directly from gateway APIs), and control subscriptions. I will implement a hybrid Stripe billing system: subscriptions (monthly quotas) + prepaid top-ups, with secure webhooks to sync quotas, renewals, and access control in real time. Let’s chat… Thanks
$2.250 USD em 7 dias
9,6
9,6

Hi, I've read through your project details about building a B2B SaaS platform providing developers with API access and it falls right into my area of expertise. I have substantial skill sets in API Integration, Cloud Computing, as well as SaaS development. I can assure you that I can start working on this project immediately and am strongly confident in delivering a robust, secure, and efficient solution. Please allow me to lend my skills and experience to aid in the successful delivery of your project. Looking forward to hearing from you. Thanks.
$2.400 USD em 30 dias
6,6
6,6

Hi, i m very much interested and i read and understnad all details and clear and understand and i m expert ai enginner and can build sich SaaS Platform Development for AI Models for you, we can discuss more, just knock me via chat. Thanks
$1.500 USD em 30 dias
5,9
5,9

Hello!, I am a US-based senior software engineer with extensive experience in building high-quality SaaS platforms. I carefully read your project description and understand you are looking to create a B2B platform providing developers access to your AI models. With about 15 years of experience in technologies like PHP, AWS, and API development, I am confident in my ability to deliver a robust solution that meets your goals. To ensure we are aligned, could you please clarify the following questions to help me better understand the project? 1. What specific AI models are you planning to offer through the API? 2. Are there any particular integrations or features you envision being critical for developers? In terms of execution, I suggest starting with a detailed requirement gathering phase, followed by developing a scalable architecture. I have successfully built similar platforms and can share examples, such as a custom API integration for a data processing tool and a responsive dashboard for a small retail SaaS company. I have been a Shopify partner since 2016 and have developed many applications and themes, which speaks to my commitment and expertise in building user-friendly solutions. I look forward to the opportunity to discuss how I can contribute to your project. Best, James Zappi
$2.500 USD em 10 dias
5,8
5,8

Hello, How are you? I've gone through your JD and can build a secure, scalable SaaS wrapper around your AI engine with clean architecture and production-ready billing. ➤ CORE IMPLEMENTATION ✔ Deploy & configure API Gateway with secure access control ✔ Nginx setup to fully isolate internal AI ports ✔ Developer dashboard (API keys, token usage, subscriptions) ✔ Landing + pricing pages (clean, conversion-focused UI) ➤ HYBRID BILLING (STRIPE) ✔ Subscription plans (upgrade/downgrade/cancel + customer portal) ✔ Pay-as-you-go wallet top-ups ✔ Secure webhooks to sync quota (renew, add, revoke tokens) ✔ Real-time balance fetch from Gateway (no duplicate DB) I look forward to hearing back from you. Thanks and Stay Safe.
$1.900 USD em 25 dias
5,7
5,7

hi! i have reviewed the details of your project and i can do this!!. we have handled similar projects successfully, and I am confident we can deliver high quality results for you. i will first understand exactly what you need, then plan everything step by step to make sure the work runs smoothly. we prefer clear communication and regular updates so that the project progresses smoothly and meets your expectations. 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 the chat to show relevant examples of our past work. looking forward to your response. mughiraa
$2.250 USD em 7 dias
5,3
5,3

I hope you're doing well! My name is Nawal, and I bring over nine years of experience in [ProjectTitle]. After carefully reviewing your project brief, I’m confident that I understand your needs and can deliver exactly what you're looking for. Here’s what I offer: ✅ Multiple initial drafts within 24 to 48 hours ✅ Unlimited revisions until you're 100% satisfied ✅ Final delivery in all required formats, including the editable master file and full copyright ownership You can check out my portfolio and past work here: ? Freelancer Profile – eaglegraphics247 I’d love to discuss your project further and explore how we can make your vision a reality. Let me know a convenient time for a quick chat! Looking forward to working together. Best regards, Nawal
$1.500 USD em 3 dias
4,8
4,8

Hi, I can help you with this. I am a developer with extensive experience with automations and integrations. I've helped clients with similar projects. Let me know your interest, Sincerely, Nicolas
$2.250 USD em 7 dias
4,9
4,9

Greetings! I’m a top-rated freelancer with 16+ years of experience and a portfolio of 750+ satisfied clients. I specialize in delivering high-quality, professional AI models based SaaS platform development services tailored to your unique needs. Please feel free to message me to discuss your project and review my portfolio. I’d love to help bring your ideas to life! Looking forward to collaborating with you! Best regards, Revival
$1.500 USD em 30 dias
4,9
4,9

Dear Client, I have carefully reviewed your project requirements for developing the SaaS platform for AI models. With over 12 years of experience in Amazon Web Services, I am confident in my ability to deliver this project with precision and excellence. I am eager to discuss your exciting project further and would like to connect with you in chat to explore how I can contribute to its success. Looking forward to collaborating with you on this innovative venture. Best regards, Nadeem
$2.300 USD em 7 dias
4,5
4,5

I can help you design and build a robust B2B SaaS platform that exposes your AI models via clean, secure APIs for developers. This includes multi-tenant architecture, metered usage, and a clear path to scale as adoption grows. I’ve worked on AI-focused SaaS products that offer model inference APIs, usage-based billing, and role-based access control. That includes integrating with common developer tooling, securing keys and tokens, and ensuring low-latency inference for production workloads. My approach would be to define core API contracts, authentication and rate-limiting, then layer in billing, monitoring, and developer onboarding (docs, SDKs, dashboards). From there, we’d iterate based on your target customers and go-to-market needs. I would love to chat more about your project! Regards
$2.250 USD em 7 dias
4,4
4,4

Bonjour Fort d'une expérience de plus de dix ans en tant que développeur full-stack et d'une solide expertise en intelligence artificielle, je suis convaincu de pouvoir mener à bien votre projet. Ma maîtrise de Linux me permettra de déployer efficacement la passerelle de gestion d'API open source et de configurer Nginx afin de sécuriser votre moteur d'IA interne contre les intrusions sur Internet. De même, mes compétences avec des frameworks modernes tels que Node.js, CodeIgniter et React seront essentielles au développement de votre boutique en ligne Next.js. Je possède également une expertise reconnue en e-commerce, notamment sur les plateformes Shopify, Magento et BigCommerce. Je m'engage à dépasser les attentes tout en respectant les délais. En tant que membre à part entière de votre équipe, mon objectif est de concrétiser votre vision de la manière la plus efficace possible. Grâce à mon expertise en conception d'interfaces ergonomiques, ce projet sera une réussite tant sur le plan fonctionnel qu'esthétique. Ensemble, nous créerons une plateforme intuitive que les développeurs apprécieront tant sur le plan technique que sur celui de l'expérience utilisateur, grâce à une interface UI/UX de haute qualité. Parlons de la manière dont notre synergie peut optimiser votre plateforme SaaS. Merci.
$2.250 USD em 7 dias
4,0
4,0

With a strong background in full-stack development, specifically MERN stack, I'm confident that I can effectively build the customer-facing wrapper around your proprietary AI models. My proficiency extends to deploying open-source API management gateways and configuring Nginx as a reverse proxy for secure routing. With an emphasis on security, I guarantee complete air-gapping of your internal AI engine's ports from the public internet.
$2.250 USD em 30 dias
4,0
4,0

Hello, I came across your profile and wanted to connect. I’m a senior Full Stack developer specializing in React.js/Next.js/Laravel, React Native, and scalable web and mobile apps. I help businesses build modern platforms and custom solutions. If you ever need development support, I’d be happy to collaborate. Best, Abbas
$2.250 USD em 18 dias
3,7
3,7

Scaling proprietary AI models into a production B2B SaaS requires more than just a wrapper; it demands a high-performance infrastructure capable of high-concurrency inference and seamless developer ergonomics. I recently architected a similar middleware for an AI startup, where we transitioned raw models into a secure, multi-tenant API environment processing 500k+ requests daily with sub-second latency. I understand the nuances of building for developers—from providing auto-generated documentation to ensuring stable, versioned endpoints that protect applications from breaking changes. My approach focuses on high availability and scaling. I will implement a FastAPI-based backend to leverage asynchronous processing, ensuring inference calls do not block the event loop. For API management, I recommend Redis for distributed rate-limiting and Stripe’s Metered Billing for accurate usage-based revenue capture. We will containerize the service using Docker and deploy via CI/CD to AWS, allowing for automated rollbacks and zero-downtime updates. Security will be a priority, utilizing OAuth2 with JWT for secure client authentication, while integrating Redoc for a developer portal that facilitates immediate onboarding. To tailor the architecture, are your models optimized for GPU inference via TensorRT, or are we building orchestration around a raw PyTorch environment? I am also curious about specific data residency or compliance requirements for your B2B clients to bake into the multi-tenant design. I’d love to discuss these technical trade-offs to ensure the platform is scalable and cost-effective; feel free to reach out via message or we can jump on a brief call to align on initial milestones.
$2.598 USD em 21 dias
3,1
3,1

Paris, France
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