Nguyen Le Phong

Stepped into technical ownership after a CTO transition, leading product delivery, architecture decisions, rollout systems, enterprise integrations, and cross-team execution for a delivery team of 8 developers and 3 QC engineers.

Key contributions

• Engineered a .NET Core multi-tenant feature-flag platform for 30+ tenants and ~40k users, with priority rules, tenant/segment/env rollouts, JSON-config values, and stateless runtime evaluation.
• Built secure Gtel & Napas integrations using RSA-4096 handshakes, AES-256 payload encryption, mTLS, certificate pinning, idempotent contracts, retry queues, and ACK-driven monitoring.
• Implemented Micro-Frontend architecture with an Angular host and React modules, enabling independent deploy cycles, feature isolation, and a smaller regression surface.
• Stabilized inherited infrastructure across ArgoCD, CI/CD, domains/SSL, and AKS/FKE/K3S/EKS, turning recurring unknowns into diagnosable and recoverable systems.
• Introduced PostHog-based observability for rollout impact, feature adoption, anomaly detection, and regression tracing across release cycles.
• Built AI-assisted engineering agents for code review, deployment support, service-quota checks, API health monitoring, and release analysis.
• Rebuilt engineering operations: org chart, competency matrix, ownership boundaries, branch strategy, release tagging, RFCs, runbooks, onboarding, and structured interviews.

Core engineer on cross-platform Zalo PC (Web, macOS, Windows), serving 15M+ MAU, with ownership across product features, tracking, design-system work, and release stability.

Also contributed to Zalo Android, improving feature stability and performance for a mobile product used by nearly 80 million users.

Key contributions

• Delivered 10+ product features, including dark mode, download flows, Kiki assistant surfaces, logging, and behavior tracking.
• Built a promotion flow with integrated tracking and monitoring, supporting activation across 15M+ MAU.
• Led Storybook-based design-system work that improved UI consistency and reuse for 50+ developers.
• Resolved support and rollout issues for 50+ client users while keeping feature quality and release confidence high.
• Maintained 3+ Android features, focusing on stability, performance, and user experience at near-80M-user scale.

Built CDxP, a customer data platform for identifying, unifying, and activating customer profiles from heterogeneous schemas across disconnected systems.

Key contributions

• Led a front-end team of 4, delivering 10+ projects across the CDxP app, Magento/WordPress demos, JS SDKs, and mobile SDKs.
• Shipped advanced product surfaces including 360 customer profiles, campaign builders, analytics, segmentation, and partner-facing demos.
• Developed a lightweight JS SDK with full tracking/engagement capabilities under 200KB and <150ms load time.
• Built reusable UI utilities, RBAC hooks, data-visualization flows, and testing coverage that improved delivery speed and maintainability.

An out-sourcing company. Most projects revolve around mobile and web apps.

Key contributions

• With expertise in the end-to-end software production process, I led a small team, mastering the phases from requirements gathering to project security, laying the groundwork for future leadership roles.
• Engaging in 8+ diverse projects across education, food and drink, banking, and e-commerce domains, I gained invaluable insights into both web and mobile application development.
• Helped secure and deliver key projects such as Savyu and Bank Tool, generating over $20,000 in revenue and earning Best Rookie of the Year recognition.

A real estate-domain startup. I was one of the founding engineers.

Key contributions

• Initiated involvement in primary web app development as a Front-end Developer. Obtained foundational web development skills, with a specialization in React JS and related technologies. Collaborated on responsive design projects, prioritizing enhancements for user experience.