Sean Zeng
Verified Expert in Engineering
Full-stack Developer
Auckland, New Zealand
Toptal member since July 16, 2020
Sean is a software engineer specializing in full-stack development, with a strong focus on usability, security, and simplicity. He's built business apps, streamlined development with DevOps pipelines, and coded solutions for projects with millions of users. With a passion for software, he excels at uplifting a team and identifying impactful solutions. Sean enjoys working with brilliant people who face great challenges and take the initiative to create excellence.
Portfolio
Experience
- Node.js - 5 years
- React - 4 years
- Python 3 - 4 years
- Web Architecture - 3 years
- Azure - 3 years
- AWS IoT - 3 years
- MongoDB - 2 years
- Google Cloud - 2 years
Preferred Environment
Cloud, Data Analytics, TypeScript, Python, IT Security
The most amazing...
...thing I've done is contribute solutions to complex problems in Immich and VScode—full-stack projects that have millions of downloads annually.
Work Experience
Professional Teaching Fellow (Lecturer)
The University of Auckland
- Lectured over 200 postgraduate students on modern development topics, including Java object-oriented programming, full-stack development, and database design. Achieved a cumulative teaching rating of over 95% in formal evaluations.
- Reviewed over 1,000 independent codebases, grading code quality and providing feedback to authors where needed. The codebases ranged from 5-person team repositories to small OOP code bases. Developed scripting tools to help automate manual processes.
- Worked with the team on adapting AI use to best prepare aspiring developers to be effective in the workplace. I learned to differentiate subtle fingerprints of AI-generated code and adapted mitigation strategies to help improve quality and learning.
- Mentored 10 different teams of five full-time developers simultaneously in an Agile development environment. Built strategies using Git access control to simplify the management of formal PR processes, reducing the occurrence of workflow regressions.
Software Engineering Intern
Datacom
- Completed data visualization of application and customer information using D3.js.
- Offered quote estimations via Restful API to a front-end Material UI and React interface protected by Azure Active Directory authentication.
- Oversaw the automatic deployment of new changes to both front-end and back-end servers using Azure DevOps, including automated SQL server migrations.
- Completed unit testing in .NET C# to validate proprietary algorithms.
- Oversaw team-based GitHub management, including pull requests, code reviews, and merging complex changes in a React front end.
Experience
Immich
https://immich.appIt features scalable video transcoding, facial recognition, and semantic search, with a unique set of industry-leading techniques across AI, data processing, APIs, and UI/UX integration.
Education
Postgraduate Diploma in Computer Science
The University of Auckland - Auckland
Bachelor's Degree in Computer Science
The University of Auckland - Auckland, New Zealand
Certifications
Microsoft Certified: Azure Fundamentals
Microsoft
Skills
Libraries/APIs
Node.js, React, REST APIs, Stripe, Stripe API, React Redux, Socket.IO, Beautiful Soup, Binance API, D3.js, React Native for Web, AWS Amplify, Web3.js, Puppeteer, Google Sheets API
Tools
GitHub, NGINX, SendGrid, NPM, Google Analytics, MongoDB Atlas, Azure App Service, Docker Compose, Auth0, Microsoft Excel, MetaMask, Jira, Let's Encrypt, IntelliJ IDEA, WebStorm, JetBrains Rider, PyCharm, Mocha, Amazon CloudFront CDN, Amazon Elastic Block Store (EBS), CircleCI, Figma
Languages
Python 3, JavaScript, Python, TypeScript, SQL, TypeScript 3, CSS, Java 11, C#.NET, C#, HTML, HTML5, Java 8, Java, PHP, Go, GraphQL, Excel VBA
Frameworks
Express.js, Material UI, .NET Core, Tailwind CSS, Jest, Redux, Django, Unity2D, .NET 3, .NET, Bootstrap, .NET 4, Unity, React Native, Next.js, Scrapy, Selenium, NestJS, Svelte
Paradigms
Web Architecture, Unit Testing, RESTful Development, Azure DevOps, Web Application Architecture, MEAN Stack, Search Engine Optimization (SEO), Object-oriented Programming (OOP), Dynamic Programming, DevOps, Management, Agile, Automation
Platforms
Windows, Azure, Docker, Amazon Web Services (AWS), Linux, AWS IoT, Anaconda, Magento 2, WordPress, Firebase, MacOS, Android, LAMP, Ethereum, iOS, Shopify, Blockchain, Raspberry Pi, Amazon EC2, AWS Lambda, Azure Functions, DigitalOcean, Jupyter Notebook
Storage
MongoDB, PostgreSQL, Redis, Databases, Docker Cloud, MySQL, Azure SQL, Azure Active Directory, Google Cloud, Amazon S3 (AWS S3)
Other
Web Scraping, Access Control, APIs, Full-stack, Authentication, MERN Stack, Data Scraping, Scraping, API Integration, Discord, Scripting, Full-stack Development, SSL Certificates, CI/CD Pipelines, Payment APIs, Web Development, Stakeholder Management, IT Security, MikroTik, Ubuntu Server, Data Visualization, WebAuth, eCommerce, IoT Security, Blockchain & Cryptocurrency, Security, Data Engineering, FIDO2, CAPTCHA, Front-end, Integration, Discord Bots, Automation Scripting, Dashboards, Reports, Architecture, Website Data Scraping, Data Analysis, Crypto, Algorithms, Machine Learning, Data Science, Computational Biology, TCP/IP, GitKraken, Cryptocurrency, Unit, Web Extensions, Cryptography, Cloud, Private NPM Modules, WebAssembly (Wasm), Live Chat, Data Privacy, Chrome Extensions, Distributed Systems, Web Security, Software & Hardware Maintenance, Software Development Management, Mobile Apps, Google Tag Manager, Google Analytics 4 (GA4), Leadership, Cryptocurrency Wallets, Migration, Cloudflare, Metrics, Lecturing, Team Mentoring, Code Auditing, AWS DevOps, Artificial Intelligence (AI), Chatbots, Image Classification, Semantic Search, Networks, Queuing Systems, Big Data, Lean Architecture, Data Analytics
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