1. Meet EM, Head of Technology ⇒ Culture Fit.

2. Cty nào, product hay outsource, product chính là gì, cụ thể làm gì, product nào contribute được nhiều nhất.

2.1. Company:

• ZaloPay (a fintech company under VNG Corporation, Vietnam).

2.2. Product or Outsource:

• It’s a product company, not outsourcing.

2.3. Main Product:

• ZaloPay — a digital payment platform and e-wallet, now evolving into a super-app that integrates over 200 mini-apps (e.g., movie tickets, travel booking, bill payment, telco recharge, etc.).

• I am in Consumer Technology Team, mainly focuses on the Mini App Platform Tool, the Tracking Hub System (which manages tracking across all mini apps), and the Onelink Solution — a system that helps direct users from social media platforms into specific mini apps.

2.4. My Role / What I Specifically Did:

• I’m responsible for developing and maintaining the tracking system for ZaloPay’s mini-app ecosystem.

• Built backend tracking services and APIs in Golang, serving as a producer service that provides tracking endpoints to collect and process user-behavior events from all ZaloPay mini apps. Leveraged concurrent programming with goroutines to handle up to 10,000 requests per second, as monitored on the Grafana dashboard.

• Developed a consumer service to process tracking messages from Kafka and integrate them with the Conversion APIs of major advertising platforms such as Firebase (GA4), TikTok Event Manager, Meta Event Manager, and Appsflyer, enabling the marketing team to monitor and analyze campaign performance in real time across social media channels.

• Implemented Redis caching to validate and standardize event schemas during request handling, improving both processing speed and data consistency.

• Built an internal dashboard using React and Ant Design that stores event schemas in the database, enabling the marketing team to create campaigns, define event-forwarding rules (e.g., event_id: "user_buy_ticket", app_id: "movie", film_name: "Mua do", campaign_id: "abc"), and easily monitor performance metrics in real time.

2.5. Which Product Contributed the Most:

• The Tracking Advertising Hub, a core system that unified event tracking across 200+ ZaloPay mini-apps and multiple ad platforms.

• It processed over 10,000 requests per second, and use as main tracking hub tool for Marketing Growth team in my company.

3. Tại sao em apply vào LINE

• I’m applying to LINE because I want to join a global company with an English-speaking environment and international colleagues, where I can broaden my perspective and continue growing professionally.

• I’ve known LINE as a leading global messaging app in Japan, and after learning more about LINE and NAVER, I truly admire how the company has evolved into a super-app with products spanning fintech, entertainment, and lifestyle. I believe this diverse ecosystem offers great opportunities to learn and grow in both technical and business areas.

• I’m also excited to take on new products, new business domains, and new challenges in an innovative environment like LINE, where I can expand my knowledge and make meaningful contributions.

• Additionally, I really value that LINE supports a hybrid working model and promotes work–life balance, which aligns well with how I work best and sustain long-term productivity.

4. Em biết gì về LINE ?

4.1. LINE App (Messaging Platform)

• The core product — a messaging and social platform with over 180 million monthly active users (mainly in Japan, Taiwan, Thailand, and Indonesia).

• Includes chat, voice/video calls, stickers, and timeline features.

4.2. LINE Pay (Fintech)

• A mobile payment and digital wallet integrated directly into the LINE app.

• Used for online and offline payments, bill payments, and P2P transfers.

4.3. LINE MAN / LINE Shopping / LINE Points (Commerce & Lifestyle)

• LINE MAN: food delivery and logistics service (especially popular in Thailand).

• LINE Shopping: e-commerce platform integrated into the app.

• LINE Points: rewards system for in-app purchases and partner spending.

4.4. LINE Ads Platform (Marketing Tech)

• Provides advertising and analytics solutions for businesses to reach users via the LINE ecosystem.

4.5. LINE MUSIC / LINE TV / LINE GAME (Entertainment)

• Streaming and gaming services within the LINE ecosystem, tailored for regional markets.

4.6. LINE Developers Platform / LINE Cloud / LINE BRAIN (Tech Infrastructure)

• Tools and APIs for third-party developers to build mini apps and services within LINE.

• LINE BRAIN: AI solutions such as chatbot, OCR, and voice recognition technologies.

5. Em muốn hỏi gì cho LINE không ?

1. If I have the opportunity to join LINE, could you please share which products or projects I might be responsible for?

2. I’m very interested in LINE’s global culture — how does LINE promote collaboration between teams across different countries?

3. Ask for AI and cloud platform in LINES ?

6. Hỏi relevant thông tin cho vị trí apply, chuyên BE.

1. How is the backend team organized — for example, by product feature, domain, or platform layer?

2. Technology used: Microservices and cloud.