• Engineering Manager with 13+ years of software engineering experience.
• Helped build and scale ITviec from an early-stage startup into a leading IT recruitment platform in Vietnam.
• Hands-on with system design, backend architecture, reliability, security, performance, and critical technical decisions.
• Building AI-powered recruitment products and AI-assisted engineering workflows.

• Build Instuigram — Helps developers learn Ruby on Rails through building an Instagram-like application, covering authentication, background jobs, caching, search, real-time updates, APIs, testing, and CI.
• Build Agentic Engineering — Practical AI-assisted engineering workflows with reusable rules and agent skills for code review, security, performance, and testing.
• Created Học Ruby on Rails Căn Bản course on Udemy, reaching 2,100+ students with 4.5-star rating.
• Authored Build Instagram with Ruby on Rails tutorial series on Medium, reaching 10,000+ reads and 3,000+ claps.

Engineering Management, Technical Strategy, Software Architecture, System Design, Mentoring, and DORA Metrics.

Ruby, Ruby on Rails, REST APIs, PostgreSQL, Redis, Elasticsearch, Sidekiq, Caching, and Performance Optimization.

LLM Integration, Prompt Engineering, RAG, Embeddings, Vector Search, Hybrid Search, AI Evaluation, and AI-assisted Engineering Workflows.

AWS, GCP, Cloudflare, CI/CD, Observability, Incident Response, and Production Operations.

OWASP ASVS, OWASP Top 10, Secure architecture, Vulnerability Management, Penetration Testing, and AWS Security Hub.