Harrison Ha

harrisonha.dev
harrisonha
info@harrisonha.dev

Full-Stack Developer | Technology Leader | Gen AI Specialist

Skills

Frontend

React, React Native, Next.js, Tailwind CSS

Backend

Node.js, Java, GraphQL, REST API

Generative AI

Python, OpenAI API, LangChain

Testing

Jest, Playwright, Storybook

Database

MongoDB, PostgreSQL, Redis

Cloud & Infrastructure

AWS, Azure, Terraform, Serverless

Education

BEng Computer Science, HKUST, Hong Kong

2012 - 2016

Exchange Programme, Iowa State University, United States

2015

Professional Summary

Full-stack technology leader with 8+ years of experience delivering end-to-end solutions for startups and enterprises. Expert in crafting scalable frontend and backend architectures, leveraging Generative AI to drive innovation and streamline workflows. Proven track record in leading cross-functional teams, optimising system performance, and developing impactful digital products that achieve measurable business outcomes.

Experience

Engineering Team Lead, Lloyds Banking Group

10/2023 - 10/2024

London

  • Spearheaded the migration of backend microservices from IBM API Connect v5 to v10, cutting latency and achieving 90% of API responses within 400ms.

  • Integrated SSO with Azure AD, enhancing authentication security and simplifying API access via Azure RBAC.

  • Led a team in implementing scalable, resilient solutions, improving system performance.

React, Node.js, Terraform, Azure

Senior Software Engineer, IMMO

04/2022 - 10/2023

London

  • Developed a Generative AI-powered data extractor, reducing manual data entry time by 99%.

  • Pioneered a micro-frontend architecture, enabling independent team deployments and expediting project timelines.

  • Designed and rolled out a unified design system, cutting website development time by 40%.

  • Mentored engineers, fostering technical growth and collaboration.

OpenAI API, LangChain, Next.js, Node.js, Terraform, AWS

Founder, Treviu

10/2019 - 12/2022

Hong Kong

  • Launched an app ranked in the top 10 of the HK App Store, with a growing user base and strong engagement metrics.

  • Engineered scalable system architectures to accommodate rapid user growth while maintaining high performance.

  • Directed business operations, marketing, and product development, achieving strong brand recognition.

React Native, Node.js, MongoDB, DigitalOcean, Twilio API, AWS

Solution Analyst, Cathay Pacific

09/2018 - 10/2019

Hong Kong

  • Transitioned the airline booking system from a monolithic to a microservices architecture, significantly improving system reliability and scalability.

Java, Spring Boot, AWS