Khôi Lê

Senior iOS Engineer with roughly 5 years of experience building mobile platform infrastructure and high-performance architectures at scale. Deep expertise in mobile systems, including background execution scheduling, advanced memory tracking, modularization frameworks, build engineering, and core UI foundations for massive user bases. Proven history of improving application stability, optimizing build and CI/CD performance, managing large-scale release lifecycles, and standardizing AI-assisted development workflows.

Effective communicator with an IELTS 7.0 English proficiency score.

Senior iOS Software Engineer - Zalo Platform Team

(2025-05)

• Leadership & Architecture Strategy: Led architectural decisions, established code review standards, and mentored junior and fresher engineers to improve system-wide modularity and engineering quality.
• Enterprise Release Management: Designed and owned robust app deployment processes, coordinating secure and reliable production releases across a footprint of more than 38M DAU and 78M MAU.
• Background Systems & Optimization: Redesigned multi-threaded scheduling infrastructure supporting up to 280M background fetches/day and more than 100K silent pre-launches/day.
• Core Platform Infrastructure: Built low-overhead internal SDKs providing shared utilities, native platform database bridges, and developer telemetry consumed by multiple engineering teams.
• High-Performance Storage Systems: Designed and developed a lightweight key-value database optimized for high-frequency data access and specialized pipelines.
• Engineering Health Observability: Designed and built a real-time observability system to track local development performance, CI/CD pipelines, and overall project health, enabling rapid bottleneck detection and data-driven optimizations that reduced build duration by 20%.
• AI Workflow Standardization: Established team-wide AI usage guidelines and documented engineering workflows integrating LLM tools for daily development, code review, and technical research.
• Cross-Functional Team Delivery: Collaborated with Product Managers, UI/UX designers, and cross-functional engineering teams to translate complex requirements into scalable technical solutions aligned with business goals.

iOS Engineer - Zalo Platform Team

(2024-02 - 2025-04)

iOS Engineer - Hitachi Vantara

(2022-10 - 2024-01)

Developed, shipped, and maintained production iOS applications for US-based enterprise clients using Swift and UIKit, collaborating with international stakeholders throughout the development lifecycle.

iOS Engineer - Sun Asterisk

(2021-11 - 2022-10)

Developed feature modules within cross-functional Agile teams using Clean Architecture principles to deliver modular, testable, and maintainable production applications.

Bachelor's Degree - Information Technology - University of Information Technology (2019-06 - 2022-12)