Engineering Manager · Zalo (VNG)

Truong Tan
Ngoc

Engineering Manager with 14+ years in Real-time Communication. Leading the engineering team that builds & operates Zalo's Core VoIP/RTC platform — serving over 80 million users at 99.99% uptime.

Get in touch → LinkedIn
Truong Tan Ngoc
Currently
Engineering Manager — Zalo Call

Scale & Impact

80M+
Users served
65M+
Daily active users
200M+
Calls per day
99.99%
Uptime SLA

Career Journey

Engineering Manager · Zalo Call (VNG)

Leading the Core RTC / SRE team

2025 — Present
  • ✦Lead the engineering team owning the entire Core VoIP/RTC platform serving 80M+ users and 65M DAU.
  • ✦Define the technical roadmap and establish an SRE culture, sustaining a 99.99% SLA in a high-concurrency environment.
  • ✦Grow people — hiring, mentoring and building career growth paths for engineers across levels.

Tech Lead / Principal Engineer · Zalo Call

Real-time Communication Platform

2018 — 2025
  • ✦Designed the core architecture of a cross-platform RTC system handling 200M+ calls/day at ultra-low latency.
  • ✦Optimized the media pipeline & bandwidth algorithms, improving audio/video quality over complex mobile networks.
  • ✦Led engineering for the team, shaping standards for engineering excellence & reliability.

R&D Technical Team Lead · Softfront VN

Enterprise VoIP / SIP

2014 — 2018
  • ✦Led the R&D team researching & developing advanced SIP/VoIP protocols for the enterprise market.
  • ✦Delivered packaged communication solutions, cutting operating costs by 40% for B2B partners.

Leadership Philosophy

🧭

People first, tech second

Create a safe environment for engineers to grow, with ownership and a clear path for every individual.

⚙️

Data-driven operations

Decisions backed by metrics & SLOs. A blameless postmortem culture that continuously improves reliability.

🚀

Delivering impact

Align the technical roadmap with business goals, prioritizing the work that creates the most value for users.

Skills & Expertise

▹ Leadership & Management

Team Building Mentoring & Coaching Technical Roadmap Stakeholder Management Incident Command Hiring

▹ Core Engineering

Distributed Systems High Availability SIP / WebRTC Media Pipeline Microservices Kubernetes C++ Golang

Let's build resilient systems together

Open to conversations about technical leadership, large-scale system architecture, or building engineering teams.

[email protected] 0853 616 191