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Hello! I'm Andy Jia, a mid-level Full-Stack & AI Engineer based in Sydney. I specialize in building scalable web applications using React/Next.js, .NET 8, and RESTful APIs, with hands-on experience in deploying cloud-native solutions on AWS and designing robust PostgreSQL databases. I love turning complex data and AI ideas into clean, testable code and shipping features that improve user experience and business outcomes. I thrive in Agile teams, value collaboration and code quality, and am currently seeking a mid-level, full-time role in Australia with a target salary of AUD 80k–110k. I'm excited to contribute to innovative projects that blend front-end excellence, solid back-end architecture, and AI-driven capabilities.…Hello! I'm Andy Jia, a mid-level Full-Stack & AI Engineer based in Sydney. I specialize in building scalable web applications using React/Next.js, .NET 8, and RESTful APIs, with hands-on experience in deploying cloud-native solutions on AWS and designing robust PostgreSQL databases. I love turning complex data and AI ideas into clean, testable code and shipping features that improve user experience and business outcomes. I thrive in Agile teams, value collaboration and code quality, and am currently seeking a mid-level, full-time role in Australia with a target salary of AUD 80k–110k. I'm excited to contribute to innovative projects that blend front-end excellence, solid back-end architecture, and AI-driven capabilities.

Andy Jia

Full Stack Developer, Web Developer, Front-End Developer, +3

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Hello! I'm Andy Jia, a mid-level Full-Stack & AI Engineer based in Sydney. I specialize in building scalable web applications using React/Next.js, .NET 8, and RESTful APIs, with hands-on experience in deploying cloud-native solutions on AWS and designing robust PostgreSQL databases. I love turning complex data and AI ideas into clean, testable code and shipping features that improve user experience and business outcomes. I thrive in Agile teams, value collaboration and code quality, and am currently seeking a mid-level, full-time role in Australia with a target salary of AUD 80k–110k. I'm excited to contribute to innovative projects that blend front-end excellence, solid back-end architecture, and AI-driven capabilities.…Hello! I'm Andy Jia, a mid-level Full-Stack & AI Engineer based in Sydney. I specialize in building scalable web applications using React/Next.js, .NET 8, and RESTful APIs, with hands-on experience in deploying cloud-native solutions on AWS and designing robust PostgreSQL databases. I love turning complex data and AI ideas into clean, testable code and shipping features that improve user experience and business outcomes. I thrive in Agile teams, value collaboration and code quality, and am currently seeking a mid-level, full-time role in Australia with a target salary of AUD 80k–110k. I'm excited to contribute to innovative projects that blend front-end excellence, solid back-end architecture, and AI-driven capabilities.

Available to hire

Hello! I’m Andy Jia, a mid-level Full-Stack & AI Engineer based in Sydney. I specialize in building scalable web applications using React/Next.js, .NET 8, and RESTful APIs, with hands-on experience in deploying cloud-native solutions on AWS and designing robust PostgreSQL databases. I love turning complex data and AI ideas into clean, testable code and shipping features that improve user experience and business outcomes.

I thrive in Agile teams, value collaboration and code quality, and am currently seeking a mid-level, full-time role in Australia with a target salary of AUD 80k–110k. I’m excited to contribute to innovative projects that blend front-end excellence, solid back-end architecture, and AI-driven capabilities.

Skills

Experience Level

Expert

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Intermediate

Language

English

Fluent

Work Experience

Full Stack AI Engineer at HelloCityAI

July 1, 2024 - Present

Developed front-end UI components using Next.js 14, TypeScript, React 18, MUI, Storybook, and Tailwind CSS; wrote Jest unit tests for component reliability; implemented Auth0 + JWT authentication for registration, login, and profile management across the platform; built and maintained RESTful API endpoints with .NET 8, including full CRUD operations; added FluentValidation, Serilog, and EF Core migrations to improve back-end stability, and used AutoMapper for DTO-entity mapping. Wrote xUnit tests for service logic to ensure correctness. Integrated the ASP.NET Core API with a Python FastAPI microservice, using Redis + Celery for asynchronous AI task processing and workflow orchestration. Implemented structured Python multi-agents with LangGraph; built RAG pipelines with ChromaDB to improve answer accuracy; built multiple AI agents (chat, reasoning, summarization, web-search) leveraging GPT-4 mini + Tavily API. Deployed the full system on AWS EC2, RDS (PostgreSQL), ELB, ECR, Route 53, ac

Research Assistant at University of Adelaide, Faculty of SET

July 1, 2024 - January 1, 2025

Designed and built a local AI agent system to process raw MRI images end-to-end, including input, preprocessing, tumor detection, segmentation, and explanation. Trained classifiers (VGG16 and custom CNN variants) using PyTorch on BraTS13, achieving 81%+ tumor detection accuracy across edema, necrosis, and tumor core. Developed segmentation models (U-Net, autoencoders, Mask R-CNN) with 85–86% accuracy after backbone testing and hyperparameter tuning. Built a multi-stage pipeline where classification outputs feed into segmentation models, enabling automated workflows. Implemented LangChain-like agent patterns and prototyped a LangGraph-inspired modular flow coordinating preprocessing, inference, visualization, and reporting. Processed multi-format MRI data and built a reusable data preprocessing agent for normalization, augmentation, slice extraction, and model-ready formatting. Delivered the final system as a desktop Python + Tkinter application that runs entirely locally.

Teaching Assistant at University of Adelaide, Faculty of ABLE

July 1, 2024 - November 1, 2024

Taught Mandarin grammar, vocabulary, and pronunciation to individual learners and a class of 12 non-native speakers, helping students build strong foundations in daily communication. Created customized explanations and interactive exercises; facilitated cross-cultural discussions on Chinese and Australian culture; provided personalized feedback and monitored progress, adjusting methods for different proficiency levels; demonstrated patience, empathy, teamwork, and strong communication in a diverse classroom.

Software Developer at Henan Iflytek Artificial Intelligence Technology

July 1, 2023 - July 1, 2024

Co-developed an enterprise Agriculture & Livestock Expert LLM, contributed to domain-specific model optimization and improving accuracy for agricultural Q&A tasks. Designed and improved RAG components including embedding generation, vector retrieval, prompt engineering, and domain-knowledge alignment. Assisted knowledge-base construction, organizing data from manuals, disease databases, and multimodal sensor information. Performed end-to-end model evaluation, tested LLM outputs for correctness, hallucination control, domain alignment, and multimodal input consistency. Documented and resolved 120+ defects across web, back-end, and AI modules using ZenTao and Lanhu. Trained interns in data annotation and multimodal debugging.