I have an HTML project that requires backend coding to be completed. The tasks involve data storage and geolocation, among other coding needs. The ideal candidate should have experience in backend development and be able to integrate these features effectively.

OVERVIEW I'm building Inkora, a subscription web app: an AI creative-writing companion for fiction (romance, fan fiction, poetry, general fiction). The React front-end is COMPLETE and will be provided, with clearly marked integration points. I need the backend built, connected, and the full app deployed. This is an 18+ platform with content safeguards. STACK ALREADY IN PLACE - React front-end (provided; single-file app ready to be scaffolded into a project) - GitHub (repo will live on my account) - Vercel (hosting, my account) - Stripe account created - Anthropic (Claude) API key — must live server-side only, never in client code - Domain: inkora.com SCOPE OF WORK 1. Secure AI endpoint — a serverless endpoint (e.g. POST /api/write) that attaches the provided system prompt, calls the Claude API with the server-side key, and returns the text to the front-end. Suggested writing model: claude-sonnet-4-6. 2. Content moderation — screen user input BEFORE the model call and model output AFTER it. Block sexually explicit content and gratuitous graphic gore. Use a inexpensive-model screen (e.g. Haiku) or a third-party moderation API. Log violations; support a warn-then-suspend flow. 3. Auth — your recommendation (Supabase or Firebase preferred). Email + password baseline; Google sign-in if low effort. 4. Database — persist each user's stories (title, genre, full message history, timestamps), characters, and notes. The front-end already models these data shapes. The story's full saved history must be sent with each AI request (this powers in-story continuity). 5. Subscriptions (Stripe) — $10/month, ~$27/quarter, ~$96/year. Free tier: 10 messages per day (make this a config value), resetting every 24h. Gate writing access by subscription status / remaining free allowance. Handle the subscription lifecycle via webhooks. 6. Age-gate persistence — the front-end collects date of birth + an 18+ affirmation; store the affirmation timestamp with the account. Structure it so a third-party age-verification provider can be swapped in later without reworking the flow. I'm open to building on a proven starter/template (e.g. the Vercel AI chatbot template) if it speeds things up — adapting solid existing code is welcome. DELIVERABLES - Deployed, working app (provided front-end + your backend) on my Vercel, repo on my GitHub - All secrets configured as environment variables (never in client code) - Short handoff notes: key rotation, where moderation logs live, how to change config values WHAT I PROVIDE - Complete front-end code, a written backend brief, and the system prompt (shared privately with the selected freelancer) - All accounts (GitHub, Vercel, Stripe, Anthropic) already created and ready TO APPLY, PLEASE ANSWER THESE IN YOUR PROPOSAL: 1. Have you wired Stripe subscriptions with webhooks before? Link or example. 2. How will you keep the API key off the client? 3. How would you implement input + output moderation cost-effectively? 4. Have you deployed serverless APIs on Vercel? 5. Your fixed quote and timeline for this scope. Proposals that don't answer these questions will not be considered.

Join our team as a Senior Software Engineer to develop and maintain backend services for our project management platform. You'll work with a small team to design, implement, and deploy features, ensuring high performance and reliability. Collaborate with frontend engineers to integrate APIs and support the development of new features. This role requires strong problem-solving skills and the ability to work independently.

Hi, I'm looking someone to replace Shopify Liquid code sections on two pages, add photos, and confirm buttons. I will provide the Liquid code replacement. The task requires attention to detail and some design skills to ensure the new elements integrate seamlessly with the existing layout.

We are seeking a Shopify Expert and Atlas AI Store Builder to set up a one-page store. The ideal candidate will have experience in designing and launching Shopify stores using the "Atlas AI Store Builder App" ensuring a seamless user experience. Responsibilities include customizing themes, integrating payment gateways, and optimizing for mobile. The project requires an intermediate level of proficiency and is expected to be completed in less than a month.

I need assistance with a technical issue involving Stripe and Woocommerce. The Webhook is not connecting, causing customer purchases to remain in Processing. The ideal candidate will have experience in resolving payment processing issues and integrating e-commerce platforms. This is a part-time project with a short duration, requiring intermediate proficiency.