Full-Stack Developer (Contract) - Platform Build

Full-Stack Developer - AI-Powered Marketing SaaS (Remote, Contract)
Location: Remote (Worldwide)
Hours: 40 hours/week
Rate: TBD Based on Experience

About the Project
We're building an AI-powered marketing platform for small businesses from the ground up. This is a greenfield SaaS build with a clear timeline: MVP in 10 weeks, public launch in 16 weeks. You'll be the lead developer working directly with the founder and a designer; no corporate red tape, just fast execution.
Tech Stack: Base44 (backend), Webflow (marketing site), Lindy.ai (AI agents), PostgreSQL, Stripe, ConvertKit, Mixpanel

What You'll Build
User authentication & subscription management system
Admin dashboard with user management, content library, and analytics
AI agent integrations via API (Lindy.ai)
Payment processing and subscription billing (Stripe)
RESTful APIs and database architecture (PostgreSQL)
Third-party integrations (email, analytics, payments)

Key Skills Required
Must Have: Backend development (Base44, Node.js, Express, Django, or Rails)
RESTful API development and third-party integrations
PostgreSQL or MySQL database design
User authentication systems (JWT, OAuth)
Stripe payment integration
Git version control
Excellent written English
Self-managed and deadline-driven

Nice to Have:
AI/ML API integration experience
Lindy.ai or similar AI platforms
SaaS product development
Subscription billing systems
Webflow integration
Experience with founder-led startups


What We're Looking For - You're the right fit if you:
Can architect scalable systems and write clean, documented code
Proactively solve problems and think about security/privacy
Communicate clearly in writing (daily async updates required)
Thrive with minimal oversight and async collaboration
Are deadline-oriented and comfortable working directly with non-technical founder
Can join weekly video calls and stay transparent about blockers


What You Get
Build a SaaS product from scratch with modern tech
Work directly with founder—fast decisions, no bureaucracy
Strong portfolio piece: deployed product with real users
Clear milestones with milestone bonuses for on-time delivery
Flexible schedule, fully remote
Potential long-term relationship beyond initial build

How to Apply
Submit the following:
1. Cover Letter (tell us why this project interests you, similar projects you've built, your experience with our tech stack, and your availability/timezone)
2. Portfolio (GitHub repos with 2-3 relevant projects, live product links if available)
3. Technical Background:
Experience with Base44 or similar frameworks?
AI API integration experience?
Subscription billing experience?
Preferred development setup?

4. Logistics:
Hourly rate expectation
Availability (start date, hours/week)
Timezone
Preferred payment method

Timeline:
Applications reviewed on a rolling basis. Ideal start date: ASAP.