LeetCode 128 - Longest Consecutive Sequence
From O(n log n) sorting to an O(n) hash set solution — finding the longest consecutive sequence by identifying sequence heads.
Skip to content
AWS · GCP · Terraform (IaC) · GitHub Actions (CI/CD)
Yufeng Lin
DevOps Engineer | GCP & AWS Solutions Architect | Full-Stack Developer
Mandarin NativeEnglish ProficientVietnamese IntermediateJapanese Intermediate
With years of experience in full-stack and mobile development, I am now focused on DevOps and cloud-native architecture.
Featured Work
All projects →End-to-End Cloud-Native Full-Stack Platform
Led the build of a cloud-native system ingesting high-frequency data from iOS, Android, and Edge Devices. Pure Serverless for scale, full CI/CD for delivery.
AI Training Data Pipeline & Automated Scraping
Compliant data collection, BeautifulSoup + RegEx parsing, and deploying a PyTorch Lite model on iOS via Objective-C — full pipeline from raw data to on-device inference.
Multi-Cloud Microservices & DevOps Automation
Terraform manages AWS + GCP together. CI/CD decoupled for Keyless Auth. Workload Identity Federation solves cross-cloud image pulls from ECR to GKE.
All Posts
View all posts →LeetCode 036 - Valid Sudoku
Validate a 9×9 Sudoku board by checking rows, columns, and 3×3 sub-boxes — from brute-force to a clean one-pass hash set solution.
Vietnamese Diary 0409 — Frieren Ch.82
Learning Vietnamese through Frieren Beyond Journey's End Chapter 82 — Sino-Vietnamese vocabulary, colloquial phrases, and grammar notes.
LeetCode 238 - Products of Array Except Self
Calculate the product of all elements except self without division — using prefix and suffix products to achieve O(n) time.
Tech Stack
Cloud and Infrastructure
CI/CD and Automation
Backend and Frameworks
Databases and Storage
AI and Frontend
Mobile Development