Senior Full-Stack Mobile Developer (AI & NLP Focus)
This is a remote position. Job Title: Senior Full-Stack Mobile Developer (AI & NLP Focus)URGENT HIRINGWork 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 OverviewWe 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 ResponsibilitiesArchitecture & 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