Curriculum Vitae

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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-assisted development tools for source code onboarding, automated unit/integration tests, and early-stage code review, increasing development velocity.

Viettel Group - Backend Software Engineer

Hanoi, Vietnam | May 2021 – June 2025

• Customer Engagement Platform | 2023 - 2025
  • Designed and implemented an in-house marketing system to support personalized campaigns via push notifications, in-app messaging, and rewards distribution, delivering 100M+ events to end users daily.
  • Optimized user segmentation creation throughput from 500 to 35,000 QPS, reducing p95 latency by 80% by introducing a Roaring Bitmap-based solution and multiple caching layers.
  • Engineered a workflow automation module using Camunda, including business process orchestration and rule evaluation, enabling non-technical operations teams to configure marketing workflows independently.
  • Led a team of 4 backend engineers across sprint planning, system design, and code reviews to continuously extend system functionality under growing product demands.
  • Owned end-to-end system observability via Grafana, identifying performance bottlenecks and resolving them through configuration tuning, caching strategies, and microservices refactoring to improve system reliability and responsiveness.
• Data Tracking System | 2022 - 2023
  • Designed and delivered a high-throughput in-house event tracking system for mobile and web platforms using Java and Spring Boot, processing 150M+ events/day and eliminating third-party licensing costs.
  • Implemented an online tracking rule configuration module supporting 3,000+ dynamic rules, reducing data-capture latency by 30% via a decision tree-based validation engine that replaced linear rule processing.
  • Engineered non-blocking, reactive APIs using Spring WebFlux to handle high-concurrency ingestion workloads with minimal thread overhead.
• Smart Authentication System | 2021 - 2022
  • Collaborated on the research and delivery of a SmartOTP solution for 20M+ end users, eliminating reliance on SMS OTPs, saving over $200K annually, and enhancing authentication reliability.
  • Implemented secure key exchange, OTP generation, and digital signature mechanisms across critical APIs, strengthening authentication integrity and reducing unauthorized access risks.
  • Hardened Android application security using native C/JNI, applying obfuscation and root/jailbreak/tamper detection, successfully passing enterprise-level security audits.
• User Contact System | 2024
  • Designed and implemented a backend module to collect and synchronize user contact data across multiple devices for the Viettel Money application, supporting 20M+ end users.
  • Optimized contact storage with Roaring Bitmap, reducing storage usage by 70% and lowering user matching latency.

Projects

• Go-Kafka clone: a distributed fault-tolerant message queue in Go, build from scratch. In-progress
• Java Single Flight: A easy-to-use Java for duplicate suppression mechanism, similar to the one in Go. In-progress
• Java Consistent Hashing: A Java library for consistent hashing algorithm, supporting virtual nodes.

Technical Skills

• Languages: Java, C, Go, Python, PHP, SQL, JavaScript, TypeScript, Bash
• Backend: Spring Boot, Spring WebFlux, Apache Kafka, Camunda, REST, gRPC, JUnit, Mockito, Testcontainers
• Frontend: HTML/CSS, ReactJS, Redux, Tailwind
• Databases: MariaDB, MySQL, MongoDB, Redis/Valkey, Elasticsearch, MinIO, S3, ClickHouse
• Platforms/Infra: AWS, Docker, Kubernetes, Linux, CI/CD, Jenkins, ArgoCD, Helm, Grafana, ELK, Wordpress, Keycloak, K6, Git
• Familiar with: Agile SDLC, Distributed Systems, Design patterns, Cybersecurity, AI-assisted development

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)

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