Curriculum Vitae

Download my CV (PDF)

General Information

• Full Name: Le-Hoang Tran
• Languages: Vietnamese (native), English (professional proficiency)

Education

• M.S. in Computer Science, George Mason University | Fairfax, VA, USA | Dec 2026 (expected)
  • Current GPA: 4.0/4.0
• B.S. in Information Technology, Hanoi University of Science and Technology | Hanoi, Vietnam | 2022
  • Excellence Degree (Top 5%) (5 years program)

Work experience

LINE Technology Vietnam - Backend Software Engineer

Hanoi, Vietnam | July 2025 – August 2025

• Researched a fault-tolerant online data migration solution for 10TB+ data from MySQL + Cassandra to a unified MySQL architecture using dual-write and backfill strategy.
• Leveraged AI-driven tools to automate unit/integration tests and preliminary code review, improving developer productivity for code implementation by 25%.

Viettel Digital - Backend Software Engineer

Hanoi, Vietnam | May 2021 – June 2025

• Customer Engagement Platform
  • Designed and implemented an in-house customer engagement platform delivering 100M+ events/day, supporting personalized campaigns via push notifications, in-app messaging, and voucher distribution.
  • Increased segmentation creation throughput from 500 to 35,000 QPS by introducing Roaring Bitmap-based indexing and caching layers, reducing p95 latency by 80%.
  • Implemented business workflow automation using Camunda, enabling non-technical users to configure workflows and reducing engineering intervention.
  • Led a team of 4 backend engineers; driving sprint planning, system design, and code reviews to continuously extend system functionalities, in reaction to meeting user needs and growing demands for performance and scalability.
  • Monitored production systems using Grafana, identifying and implementing performance optimizations proactively across configuration tuning, caching, and microservices architecture.
• Data Tracking System
  • Designed and developed a high-throughput user activity tracking system for mobile and web platforms, replacing 3rd party’s licensing costs annually.
  • Implemented a CMS and online tracking rule configuration module supporting 3,000+ dynamic tracking rules.
  • Optimized rule validation engine by implementing a decision-tree based rule evaluator, reducing latency by 30% and improving data-capture throughput.
  • Built reactive APIs using Spring WebFlux, processing 150M+ events/day with improved throughput and reduced response times under peak load.
• Smart Authentication System
  • Designed and delivered SmartOTP solution for 20M+ users, replacing SMS OTPs and saving $200K+ annually while improving authentication reliability.
  • Implemented secure key exchange, OTP generation, and digital signature mechanisms across critical APIs, strengthening authentication and API security.
  • Implemented mobile security hardening (code obfuscation, root/jailbreak/tamper detection) using native C/JNI, passing enterprise-level security audits.
• User’s Contact System
  • Designed a backend module to collect and synchronize user contact data across devices for Viettel Money application, supporting 20M+ users.
  • Optimized user contacts store using Roaring Bitmap, reducing storage usage by 70% and improve contact discovery throughput by 80%.

Technical Skills

• Programming Languages: Java, C, Python, JavaScript, PHP, SQL
• Backend: Spring Framework, Spring Boot, Apache Kafka, Camunda BPM, REST APIs, gRPC, Unit & Integration Testing, Microservices, Distributed Systems
• Databases: MariaDB/MySQL, MongoDB, Redis/Valkey, Elasticsearch, MinIO, ClickHouse
• Familiar with: AWS, Docker, Kubernetes, ELK, k6, Grafana, Keycloak, CI/CD, SDLC, AI-assisted development

Publications

• Proposed Intelligent Decision Support System using Hedge Algebra integrated with Picture Fuzzy Relations for improvement of decision making in medical diagnoses
  • Hoang, T.L., Pham, H.V., Hung, N.Q. et al. Proposed Intelligent Decision Support System Using Hedge Algebra Integrated with Picture Fuzzy Relations for Improvement of Decision-Making in Medical Diagnoses. Int. J. Fuzzy Syst. 25, 3260–3270 (2023). https://doi.org/10.1007/s40815-023-01548-4

Certificates

• AWS Certified Solutions Architect – Associate - Issued Sep 2023
  Credential

• MongoDB Associate Developer - Issued Apr 2024
  Credential

• Oracle Certified Associate – Java SE 8 Programmer - Issued Apr 2023
  Credential

• Redis Certified Developer - Issued Dec 2021
  Credential

• English Test: TOEIC 955/990, IELTS 7.5 (Issued 2024)