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 Originally posted on Himalayas