Full-Stack Developer - AI-Powered SaaS Platform (D50 AI)

Responsibilities

• Building and maintaining our multi-engine SaaS platform
• Implementing new features across Lead Gen, Content, and AI Agent engines
• Integrating external APIs (VAPI, HeyGen, Stripe, etc.)
• Deploying and managing production infrastructure
• Working directly with the founder to shape product direction

Requirements

• 1.5+ years of full-stack development experience
• 2+ years working with the exact tech stack listed above (React, TypeScript, tRPC, Drizzle)
• 3+ years building AI agents or agentic systems
• Proven experience with complex SaaS platforms (multi-tenant, payments, integrations)
• Strong portfolio of production applications you've built
• Excellent English communication (written and verbal)
• Self-starter who can work independently without constant supervision
• Problem solver who can debug complex issues across the stack
• Fast learner who can pick up new APIs and technologies quickly
• Available full-time (40+ hours/week)

Preferred Qualifications

• Experience with Inngest (background jobs)
• Experience with VAPI or Bland AI (AI calling platforms)
• Experience with HeyGen (AI avatar videos)
• Experience with Stripe Connect (marketplace payments)
• Experience with OpenClaw or Puppeteer (browser automation)
• Experience with LangChain or LangGraph (agent frameworks)
• Experience with MongoDB and MySQL together
• Experience with Railway deployment
• Experience building recruitment/hiring tools
• Experience building content creation tools
• Experience building lead generation tools

Benefits

• Competitive salary based on experience
• Equity stake in the company (0.5%-2%)
• Growth opportunity - become lead as company scales
• Cutting-edge tech - work with latest AI tools
• High impact - your work directly affects product success
• Direct access to founder - no bureaucracy

About the Company

D50 AI is building the future of AI-powered marketing & business automation. We're a fast-growing startup that combines cutting-edge AI technology with practical business solutions.