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About me

About me

Hoàng Luân

Backend Developer

🎯 About

Software engineer with over 4 years of experience, specializing in backend development and scalable system architecture. Passionate about building impactful, high-performance software that drives real business value at scale.

At TEL4VN, I contributed to the development of distributed systems that handle millions of events daily, enhancing system reliability and team productivity. I'm now seeking the next opportunity to tackle complex engineering challenges in areas like system design, infrastructure, and intelligent automation.

💡 Skills

Programming Languages

Go Python Typescript SQL

Backend

Gin gRPC REST APIs WebSocket Bun

Frontend

Svelte SvelteKit Bootstrap 5 HTML5 CSS3

Databases

PostgreSQL MySQL MariaDB MongoDB Elasticsearch

DevOps & Tools

Docker Portainer Traefik Debezium Sentry
GitHub Actions Jenkins Redis RabbitMQ Memcache

Soft Skills

Team Leadership Communication Project Management Problem Solving Critical Thinking

🧠 Experience

Senior Golang Developer | TEL4VN

2023 – Feb 2025

Responsibilities:

  • Led the design, analysis, and implementation of robust and scalable software architectures across various projects.
  • Collaborated closely with cross-functional teams and stakeholders to ensure technical alignment, project success, and timely delivery.
  • Worked directly with clients to gather requirements, conduct system demonstrations, and provide on-site support during business trips.
  • Established and enforced technical standards and best practices to maintain code quality, consistency, and system performance.
  • Mentored and trained new team members, fostering a collaborative and growth-oriented environment.
  • Conducted onboarding sessions and ongoing technical training to help junior developers integrate quickly and effectively.
  • Drove innovation by researching and adopting emerging technologies and advanced methodologies into the development process.
  • Authored and maintained detailed technical documentation to ensure knowledge sharing and maintainability of complex systems.

Fullstack Developer + Team Leader | TEL4VN

2020 – 2023

Responsibilities:

  • Designed, developed, and maintained both front-end and back-end components of modern web applications using scalable, modular architecture.
  • Developed and integrated RESTful APIs to enable smooth data exchange between client and server-side systems.
  • Wrote clean, efficient, and maintainable code following industry best practices, code reviews, and design patterns.
  • Performed thorough testing, debugging, and optimization to ensure high performance and reliability of applications.
  • Stayed current with the latest trends and technologies in full-stack development, continuously exploring ways to improve performance and scalability.
  • Worked directly with clients to gather requirements, demonstrate product features, and provide on-site technical support when needed.

Intern Full Stack Developer | Wisky

Dec 2019 – Jun 2020

Responsibilities:

  • Developed and maintained both frontend and backend features.
  • Designed APIs for system integration.
  • Wrote clean and efficient code aligned with coding standards.

🚀 Projects

Pitel Callcenter (CCP)

An advanced call center platform designed to streamline business communication and enhance customer experience.

Technologies Used: Go Gin SvelteKit Websocket PostgreSQL Elasticsearch RabbitMQ Redis

Team size: 4-6

Key Achievements:

  • Designed a highly scalable architecture capable of handling millions of calls and events daily with minimal latency.
  • Improved call routing efficiency through intelligent queue management and real-time agent status tracking.
  • Integrated CRM systems to provide agents with instant customer data, reducing average handling time by 20%.
  • Enabled customizable dashboards and live call analytics, enhancing operational visibility and decision-making.
  • Played a key role in migrating legacy monolithic systems to a modern microservices-based infrastructure.

Pitel Autocall

A next-generation outbound auto-dialing solution built to optimize campaign delivery and maximize customer reach.

Technologies Used: Go Gin SvelteKit PostgreSQL RabbitMQ Redis (PubSub) Docker

Team size: 5

Key Achievements:

  • Developed a flexible campaign scheduler with retry logic and prioritization, increasing successful call rates by 35%.
  • Built a dynamic message templating engine supporting multi-language voice scripts.
  • Enabled fine-grained call result tracking and real-time statistics through WebSocket-powered live dashboards.
  • Integrated with external APIs (SMS, CRM, etc.) to create omnichannel campaign support.
  • Decreased infrastructure cost by 25% by optimizing worker process management and Redis Pub/Sub for event handling.

Pitel VMD

An AI-powered Voicemail Detection system that enhances call automation by identifying voicemail greetings in real time.

Technologies Used: Go Python TensorFlow Machine Learning Websocket Docker

Team size: 4

Key Achievements:

  • Designed and trained a real-time audio classifier with 92%+ accuracy for voicemail greeting detection.
  • Enabled dynamic call flow switching within milliseconds of detection, improving campaign efficiency by 40%.
  • Seamlessly integrated TensorFlow models into Go-based backend with minimal overhead using gRPC bridges.
  • Built a real-time streaming engine with WebSocket for low-latency inference during ongoing calls.
  • Reduced manual verification by customer support team, saving ~200 man-hours/month.

FinS Collection

A debt collection platform tailored for financial institutions with modular, service-oriented architecture.

Technologies Used: Go Gin PostgreSQL Elasticsearch RabbitMQ Redis MinIO

Team size: 7

Key Achievements:

  • Architected a microservices-based platform that supports asynchronous workflows and fault-tolerant recovery.
  • Integrated NLP-powered reminders and auto-generated emails for debtors, increasing collection rates by 22%.
  • Provided custom scoring models for debt prioritization using historical data stored in Elasticsearch.
  • Supported multi-tenant architecture with granular permission controls and audit logs.
  • Reduced client onboarding time by 50% through reusable service templates and dynamic configuration options.

🎓 Education

Master of Software Engineering | FPT School of Business & Technology (FSB)

May 2024 – Dec 2025

  • Specialization: AI, Machine Learning, Blockchain

Bachelor of Information Assurance | FPT University

Oct 2016 – May 2020

📜 Certifications

  • Agile Project Management – University of Colorado Boulder (Oct 2024)
    View Certificate
  • Project Management Specialization – University of Colorado Boulder (Oct 2024)
    View Certificate

🏆 Awards

  • TEL4VN Manager of The Year 2023

📬 Contact

Last updated: March 2025