About

Hello, I'm Daniel Jin, a Senior Software Engineer and Full Stack Developer with over 11 years of experience in crafting innovative software solutions. I hold a Bachelor's degree in Computer Science from City University of Hong Kong and have a diverse background in both frontend and backend development.

My expertise lies in modern JavaScript frameworks such as React, Angular, and Vue.js, where I have successfully led the development of scalable applications and optimized performance for various projects. I am also proficient in C# (.NET), and Java, bringing a versatile skillset to tackle diverse software engineering challenges. I have extensive experience with TypeScript, Next.js, and GraphQL, which I've used to build high-performance web applications. I'm also proficient in backend technologies like Express.js, NestJS, and Go, as well as database systems such as PostgreSQL and DynamoDB.

Throughout my career, I have taken on leadership roles, mentoring junior developers while ensuring high coding standards through thorough code reviews. My experience includes designing secure authentication flows using AWS Cognito, integrating payment systems like Stripe, and implementing CI/CD pipelines (Continuous Integration/Continuous Deployment) to enhance team productivity and streamline deployment processes.

I have a strong background in cloud technologies, particularly AWS (Amazon Web Services) services such as Amplify, S3 (Simple Storage Service), AppSync, and Lambda. I've implemented GenAI chatbots using Amazon Bedrock and integrated video streaming functionality with Amazon IVS (Interactive Video Service) player. My experience also extends to performance optimization and monitoring using tools like DataDog and Sentry.

I thrive in collaborative environments and have a proven track record of delivering projects on time while maintaining quality. I am passionate about solving complex challenges through creative problem-solving and leveraging cutting-edge technologies to drive innovation. I'm excited about opportunities to contribute my technical expertise to impactful projects that enhance user experiences and drive business success.

💼 Experience
🎓 Education
🤹🏼‍♂️ Skills
🏐 Interests

Professional Experience

Senior Software Engineer / Tech Lead @Kickoff by Zuju

Aug 2023 - Present

Led MVP development, enhancing team collaboration and enabling future features.
Designed a frontend architecture with AWS and Node.js for scalable data processing.
Architected a frontend solution with React and Next.js, reducing application load time by 40% and increasing page speed, resulting in a 15% boost in user retention.
Mentored and guided 7 junior developers, reducing onboarding time by 20% and increasing team collaboration through regular code reviews..
Streamlined authentication flows, increasing security and reducing user complaints by 25%.
Deployed Stripe payment gateway, generating a 20% increase in transactions and enabling recurring revenue within the first 3 months.
Streamlined app performance by identifying key bottlenecks, reducing load times by 35%, and enhancing user experience metrics.
Engineered video streaming functionality using the Amazon IVS player to display live sports matches sourced from Sportradar & OBS studio, enhancing user engagement and providing a seamless viewing experience.
Led the migration from Create React App to Next.js, leveraging Node.js for server-side rendering, improving SEO rankings by 50% and reducing the overall bundle size by 30%.
Introduced automated testing strategies (unit, integration, E2E), reducing production bugs by 40%.
Refined CI/CD pipelines, accelerating release cycles and improving team deployment confidence by 25%.
Developed a GenAI Chatbot using a fully managed Retrieval-Augmented Generation (RAG) solution, utilizing Knowledge Bases for Amazon Bedrock to enhance user interactions and improve response accuracy.

Senior Software Engineer @Honeydew

May 2022 - Jul 2023

Created a scalable React-based frontend architecture, ensuring seamless performance as the user base grew by 50%.
Accelerated authentication flow design, decreasing user drop-off during sign-up by 18%.
Refined application performance, leading to a 20% reduction in load times and a measurable improvement in user satisfaction.
Established a test-driven development (TDD) process, resulting in 30% fewer production issues.
Refined CI/CD pipelines, reducing deployment times by 45% and increasing overall development efficiency.
Developed a comprehensive microservice architecture for a library management system using NestJS, RabbitMQ(via CloudAMQP), TypeORM, and PostgreSQL (hosted on Supabase), enabling efficient service communication and scalability.

Senior Software Engineer @Expoplatform

Jun 2020 – Apr 2022

Built Exhibition UI with React.js, Next.js, TypeScript, and Node.js/Express.js, leveraging Go for backend APIs, cutting load times by 30% for 10,000+ users.
Designed Conference UI using Material UI, Zustand, and GraphQL, boosting engagement by 20% and accessibility by 25%.
Engineered Hybrid Event UI with React.js, Next.js, and Nest.js, using Golang for real-time syncing, improving retention by 15%.
Developed Floorplan UI with React Konva and Map APIs (MapBox, Google Maps), supported by Go for data processing, reducing navigation errors by 35%.
Created Admin Panel with React.js, Redux (Saga), and Nest.js/GraphQL, automating 40% of tasks via Jira.
Optimized CI/CD pipelines with Node.js and Golang, shortening release cycles by 30%.

Senior Full Stack Web Developer @IngeniousVision

Mar 2018 – May 2020

Created and scaled high-traffic e-commerce platforms, driving a 28% growth in client revenue through optimized checkout flows.
Engineered and maintained secure healthcare systems (EMR/EHR), reducing system downtime by 18% and enhancing team productivity.
Led the YTX Finance web application project, developing a blockchain-based platform for NFT minting and a decentralized card game using Web3.js and Solidity, which increased user transactions by 15% in its first month.
Revitalized the frontend architecture of various SaaS applications, reducing codebase complexity by 20% and improving maintainability.
Delivered client projects ahead of deadlines, leading to a 28% boost in client satisfaction.

Senior Frontend Developer @New Marketing

Jan 2014 – Jan 2018

Designed and developed over 7 custom Magento e-commerce websites, driving a 28% increase in client sales.
Redesigned checkout processes, leading to a 20% increase in customer purchases.

Education

Bachelor of Science in Computer Science

City University of Hong Kong

2010 – 2013

Constructed a hybrid mobile app for fast food delivery as a final year project, utilizing Python backend APIs.
Collaborated on a multidisciplinary robotics project, enhancing teamwork and technical skills.

Diploma in Information Technology

Fudan University

2007 - 2010

Developed full-stack web applications as part of the final year project, focused on the fast food delivery industry.

Skills

Key Skills:

Programming Languages: JavaScript, TypeScript, Python, Rust, PHP, Solidity, C#, .net, Java
Frontend: React.js, Next.js(App Router/Page Router), Redux, Zustand, Tailwind CSS, Material UI, Storybook, Framer Motion
Backend: Node.js, Express.js, WebSockets, REST APIs, GraphQL
Databases: MongoDB, MySQL, PostgreSQL, ORACLE
Testing: Jest, Mocha, Cypress, Playwright, Chai
Version Control: Git, GitHub, GitLab, Bitbucket
DevOps & CI/CD: Docker, Jenkins, GitLab CI, CircleCI, Github Actions
E-commerce Platforms: WooCommerce, Magento, OpenCart
Blockchain & Web3: Solidity, Ethereum, Solana, Web3.js
Cloud Services: AWS, GCP, Azure
Agile Methodologies: Scrum, Kanban
AI & ML Frameworks/Tools: LLM, LangChain, LangSmith, LangGraph, RAG, VectorStore

Technical Proficiencies:

Web Development: Expertise in building large-scale, scalable web applications with modern JavaScript frameworks (React, Angular, Vue, Next.js)
Performance Optimization: Skilled in code profiling, lazy loading, and other performance enhancement techniques.
CI/CD & Automation: Experience setting up and optimizing CI/CD pipelines, automating testing and deployment.
Full-Stack Development: Proficient in developing both client-side and server-side logic, integrating front-end with backend systems.
Database Management: Worked with MySQL, PostgreSQL, and MongoDB to optimize database performance..
Payment Integrations: Integrated payment gateways (e.g., Stripe, PayPal) to facilitate secure and seamless online transactions.
Cloud & Hosting: Experience deploying applications on AWS, GCP, and Azure, including configuring virtual machines and storage.

Daniel Jin