Senior Full-Stack Developer (AI Systems & Product Lead)

Lead Software Engineer – AI CRM & Voice Agent Systems


Job Description

We’re looking for a senior-level full-stack developer to take full technical ownership of two existing B2B software products currently in development. Both projects are already underway with existing codebases and partial builds completed.

You will be stepping into a lead role to take over from current developers, complete development, stabilise systems, and drive both products to launch. Long-term, this role will also involve ongoing maintenance, feature development, and potentially building and leading a small dev team.

The two products include:
• An AI-powered CRM and funnel automation platform for B2B businesses
• A voice AI agent system for automated customer interaction and communication

This is a hands-on development role with ownership over architecture, execution, and delivery.

Key Responsibilities
• Take over existing codebases and understand current system architecture
• Lead completion of both software products from current stage to production launch
• Work directly in the code (not just management or oversight)
• Review and improve existing development work and clean up technical debt
• Build, test, and deploy new features across both platforms
• Implement and refine AI integrations (CRM automation + voice agent logic)
• Coordinate with any existing developers or contractors during transition
• Ensure systems are scalable, secure, and production-ready
• Set up proper development processes (version control, staging, deployment flow)
• Provide ongoing maintenance, improvements, and bug fixes post-launch
• Eventually help scale and guide additional developers if team expands

Ideal Candidate
• Strong full-stack development experience (frontend + backend)
• Experience working with SaaS products or startup environments
• Confident taking over and working inside existing codebases
• Experience with AI integrations (OpenAI, automation workflows, APIs, etc.)
• Experience with CRM systems, automation tools, or workflow platforms
• Familiar with voice AI systems or API-based telephony tools (bonus)
• Strong problem-solving ability and ability to work independently
• Comfortable owning delivery, not just writing code
• Good English and communication skills and ability to work remotely



Bonus Experience
• Building AI agents or automation systems
• Twilio / voice APIs / conversational AI tools
• CRM or funnel builder platforms
• DevOps / deployment pipelines
• Leading small development teams


What Success Looks Like
• Smooth takeover from current developers with no disruption
• Both platforms fully completed and launched
• Systems are stable, scalable, and ready for customers
• Clear development roadmap established
• Reduced dependency on external contractors over time