Senior Full-Stack Mobile Developer (AI & NLP Focus)

This is a remote position.

 
Job Title: Senior Full-Stack Mobile Developer (AI & NLP Focus)
URGENT HIRING 
Work Roster: 10:00 AM – 6:00 PM (Melbourne Time) 
Weekends: Saturday & Sunday 
Employment Type: Full-Time | Long-Term 
Experience Required: 5+ years in Full-Stack Development 
 
Role Overview 
We are seeking a Senior Full-Stack Mobile Developer with Technical Leadership capabilities for our client in Australia to take ownership of system architecture, development, and long-term maintenance across multiple products. This role is ideal for someone who enjoys building scalable systems from the ground up in a fast-moving startup studio environment. 
 
Key Responsibilities 
Architecture & Development 

• Lead end-to-end development using a shared, modular technology stack 
  
• Design and implement scalable solutions using React Native and Node.js 
  
• Ensure clean, maintainable, and reusable code across multiple applications 
  
• Frame internal dashboards, monitoring, and tooling as part of designing scalable systems and shared platforms.
  

AI Development 

• Building an AI-driven mobile application focused on NLP-based journaling, sentiment analysis, and pattern detection, correlating user inputs with pain/stress signals and delivering empathetic, logic-driven responses. 
  
• Implement and optimise LLM and Vision APIs, specifically GPT-4o 
  
• Develop high-accuracy image recognition and structured text generation pipelines 
  
• Design AI-chaining logic to support multi-step intelligent workflows 
  
• AI audit logs, prompt troubleshooting, and observability as part of building reliable and debuggable AI pipelines.
  

Cross-Application Scalability 

• Build a reusable Master Engine for Authentication, Payments and AI orchestration 
  
• Ensure consistency and scalability across the entire SaaS portfolio 
  
• Ensure user management, subscriptions, and payments as reusable platform components that support multiple products.
  

Admin & Internal Systems 

• Develop a centralised Admin Command Center for internal operations 
  
• Enable system monitoring, user management, and AI troubleshooting.
  

System Quality & Reliability

• Managing real-time alerts for API failures alongside database performance and bottleneck tracking.
  

Technical Requirements 

• Frontend: Strong expertise in React.js 
  
• Mobile: Proven experience with React Native 
  
• Backend: Node.js with RESTful API design 
  
• Hands-on experience with OpenAI APIs 
  
• Prompt engineering and Vision models 
  
• Hands-on experience with Python  
  
• Experienced in NLP, computer vision, LLMs, and Python-based data workflows. 
  
• PostgreSQL (Supabase preferred) with real-time data synchronization 
  
• Stripe integration experience 
  

 
What Makes This Role Exciting 

• Architectural Ownership: You design and drive the technical vision 
  
• Startup Studio Model: Work across 4+ AI products instead of a single long-term project 
  
• Creative Freedom: Flexibility to choose the best tools and solutions 
  
• Career Growth: Opportunity to lead technical expansion as the product portfolio scales