Novie Estoy

Senior Full Stack AI Engineer with 10+ years of experience designing and delivering scalable web applications and AI-powered systems across multiple industries. Strong expertise in JavaScript (React.js, Next.js, Node.js), Python (FastAPI, Django), PHP (Laravel), and C# (.NET), with a focus on building end-to-end full-stack and microservices architectures. Experienced in developing LLM-powered applications, NLP solutions, and RAG systems, leveraging vector databases such as Pinecone and FAISS.

Skilled in building high-performance backend systems using Laravel and Node.js, along with RESTful and GraphQL APIs, and optimizing database performance using PostgreSQL, MySQL, MongoDB, and Redis. Proficient in cloud-native development with AWS, containerization using Docker and Kubernetes, and implementing CI/CD pipelines for reliable delivery. Known for improving system scalability, performance, and maintainability while working effectively in Agile and distributed teams.

Senior Full Stack AI Engineer - Apkudo - Remote – United States

(2025-04 - 2026-03)

• Led the end-to-end architecture and development of AI-powered platforms using React.js, Next.js, Node.js, and Python (FastAPI), enabling scalable and maintainable full-stack solutions across enterprise environments.
• Designed and deployed microservices architecture using Docker and Kubernetes, improving system scalability and achieving consistently high system availability in production environments.
• Built advanced LLM-powered applications leveraging OpenAI and Claude APIs, delivering intelligent recommendation systems and conversational AI with significantly improved user engagement.
• Engineered Retrieval-Augmented Generation (RAG) pipelines utilizing Pinecone and FAISS vector databases, increasing response accuracy and contextual relevance by a substantial margin.
• Developed high-throughput data pipelines using Apache Kafka and Apache Airflow, enabling efficient processing of large volumes of real-time and batch data.
• Optimized backend performance through Redis caching, database query tuning, and asynchronous processing, resulting in noticeably faster API response times.
• Integrated complex enterprise systems via RESTful and GraphQL APIs, ensuring smooth and reliable data synchronization across multiple platforms.
• Implemented secure authentication and authorization systems using OAuth2, JWT, and role-based access control (RBAC) to meet enterprise-grade security requirements.
• Built and maintained CI/CD pipelines using GitHub Actions and Jenkins, leading to faster and more reliable deployment cycles.
• Collaborated in Agile/Scrum environments, consistently delivering high-quality production-ready features.
• Mentored engineering teams on scalable system design, clean architecture, and testing strategies, contributing to stronger code quality and team productivity.

AI Engineer - Asiagate Networks, Inc. - Makati, Philippines

(2021-07 - 2024-09)

• Designed and deployed production-grade machine learning models using Python, TensorFlow, and Scikit-learn, delivering robust and reliable predictive analytics solutions.
• Built scalable data processing pipelines with Apache Spark, Pandas, and Apache Airflow, handling large and complex datasets efficiently.
• Developed advanced Natural Language Processing (NLP) solutions using spaCy, NLTK, and transformer models (BERT, GPT) for text classification, sentiment analysis, and automation tools.
• Implemented real-time inference systems using FastAPI and Flask, achieving consistently low-latency predictions for user-facing applications.
• Improved model performance through hyperparameter tuning, feature engineering, and model evaluation, leading to meaningful gains in accuracy and reliability.
• Designed and integrated AI services into production systems using RESTful APIs and microservices architecture, ensuring scalable and maintainable deployments.
• Deployed and managed ML models in cloud environments using AWS SageMaker, Docker, and EC2, enabling flexible and production-ready infrastructure.
• Implemented monitoring and observability using Prometheus and ELK Stack (Elasticsearch, Logstash, Kibana), improving system visibility and issue resolution speed.
• Collaborated with cross-functional teams including data engineers and product managers to align AI solutions with business goals and user needs.
• Contributed to system architecture design for scalable AI infrastructure, ensuring stable and resilient system performance.
• Actively participated in Agile development processes, supporting continuous delivery and iterative improvements.

Full Stack Developer - Accenture - Remote - Dublin, Ireland

(2018-10 - 2021-04)

• Developed enterprise-grade web applications using Angular, React.js, Node.js, and Java (Spring Boot), supporting high-traffic and business-critical systems.
• Designed and implemented scalable RESTful APIs and backend services, handling a large number of concurrent requests efficiently.
• Built responsive and high-performance frontend applications using HTML5, CSS3, and modern JavaScript frameworks, improving overall user experience and usability.
• Integrated complex enterprise systems including ERP, CRM, and third-party APIs, enabling smooth and reliable business process automation.
• Improved application performance through code optimization, lazy loading, and efficient state management techniques, resulting in noticeable performance improvements.
• Managed and optimized databases using PostgreSQL, MySQL, and MongoDB, ensuring consistent and efficient data operations.
• Implemented secure authentication systems using OAuth, JWT, and enterprise SSO solutions, enhancing application security and access control.
• Built and maintained CI/CD pipelines using Azure DevOps and Jenkins, enabling faster and more stable release cycles.
• Worked in Agile Scrum teams, delivering high-quality features within evolving project requirements.
• Conducted code reviews, unit testing, and integration testing, ensuring reliable and maintainable codebases.
• Collaborated closely with QA, DevOps, and product teams to ensure end-to-end delivery of scalable and dependable software solutions.

Backend Developer - Airtasker - Remote - Sydney, Australia

(2017-01 - 2018-08)

• Designed and developed scalable backend services using Node.js, Express.js, and Python, supporting a high-traffic marketplace platform with consistent reliability.
• Built and maintained RESTful APIs that handled large volumes of concurrent user requests, ensuring smooth and responsive platform interactions.
• Architected backend components following microservices principles, improving system modularity and maintainability.
• Optimized database performance using PostgreSQL and MySQL, applying indexing, query tuning, and schema improvements to achieve faster and more efficient data retrieval.
• Implemented caching strategies using Redis, significantly improving response speed and reducing database load.
• Developed background job processing systems using RabbitMQ and cron-based schedulers, enabling reliable asynchronous task execution.
• Integrated third-party services such as payment gateways and notification systems, ensuring secure and seamless transaction workflows.
• Strengthened application security by implementing JWT-based authentication and data validation mechanisms, reducing potential vulnerabilities.
• Monitored and debugged production systems using logging and monitoring tools, ensuring stable and consistent system performance.
• Collaborated closely with frontend engineers to deliver well-structured APIs and smooth client-server integration.
• Participated in Agile development processes, contributing to continuous delivery and iterative backend improvements.

Junior Software Developer - Symph - Remote - Cebu, Philippines

(2015-09 - 2016-12)

• Contributed to web application development using JavaScript, PHP, and Python, supporting both frontend and backend functionalities.
• Assisted in building backend services with Node.js and Express.js, gaining experience in API development and server-side logic.
• Developed responsive UI components using HTML5, CSS3, and JavaScript, improving user experience and accessibility.
• Wrote clean and maintainable code following best practices, ensuring readability and long-term sustainability of the codebase.
• Participated in debugging and issue resolution, helping improve application stability and performance.
• Worked with MySQL databases, performing basic query optimization and data handling tasks.
• Collaborated with senior developers and contributed to feature development, gaining exposure to real-world engineering workflows.
• Used Git for version control and participated in Agile development processes, supporting team collaboration and continuous improvement.

Bachelor of Science - Information Technology - City University of Hong Kong (2011 - 2015)