Senior Full-Stack Next.js Dev for SaaS

Required: Senior Full-Stack [login to view URL] Developer - SaaS Platform Ready for the US Market Contract Type: All-inclusive Fixed Price – 30 Days – Final Delivery in Owner’s Accounts 1. Scope of Work in Numbers – Non-Negotiable / Zero Ambiguity: 6 Templates serving 10 Main Pages + 18–22 Sales Funnel Paths 5 Tier Pricing: ACQUIRE / CONVERT / AUTOMATE / RETAIN / REVENUE OS [Monthly/Annual + 4 Currencies] Sales System: 30 Upsell Services + 5 Order Bumps + 10–15 Conditional Offer Sequences [Upsell/Downsell/One-Click] Languages: EN/AR + True RTL Support + Responsive Design Tech Stack: [login to view URL] 14 App Router + TS + Tailwind + Supabase RLS + Stripe/PayPal + GHL + Vercel STRICTLY FORBIDDEN: WordPress / Elementor / Bootstrap / Pre-made Templates 2. Mandatory Requirements for Applicants – Do Not Apply If You Do Not Meet These: Proven experience with 3 LIVE projects using [login to view URL] + Secure Payments [Direct links + Your personal role] At least one project demonstrating: Server-Side Verification + Webhooks + Idempotency + Upsell Funnel A Loom video or verifiable Demo (with sensitive data blurred out/masked) 3. Core Responsibilities: Security: RLS + Price verification on server-side ONLY + API key protection + zero credit card storage Payments: Stripe + PayPal Vault + Duplicate prevention + Explicit agreement for recurring charges Performance: LCP <2.5s / INP <200ms / CLS <0.1 + Full Sandbox testing first 4. Pricing & Guarantees: Price: All-inclusive fixed price – Must be stated at the beginning of your proposal Timeline: 30 calendar days + 3 Loom video updates per week Warranty: 180 days free post-launch support – Critical bugs must be addressed within 24 hours Ownership: Full Code + GitHub + DB Migrations + Documentation + Deployment to Owner’s accounts Handover: No final sign-off without passing 10 documented Acceptance Tests [Pass/Fail + Evidence] 5. Application Method – Incomplete Proposals Will Be Automatically Rejected: Start your proposal strictly using this exact template: I agree to the full scope and acceptance tests: Yes/No Fixed Price: $___ Timeline: ___ Days 180-Day Warranty: Agree / Disagree 3 Projects: [Link 1 + My Role] [Link 2 + My Role] [Link 3 + My Role] Exceptions / Additional Costs: None / Yes [Specify] --- 來源：Freelancer.com | 出價次數：103 | 剩餘時間：6 日 | 專案類型：固定預算