Zalopay, Software Engineer

2 weeks ago

Ho Chi Minh City, Vietnam VNG Full time

The
- **Core**
**Payment** is the heart of ZaloPay, serves as the central component of ZaloPay, one of leading e-wallet platforms in Vietnam. Our primary responsibility is to handle various transaction processes and manage the fund flows, encompassing activities such as top-ups, withdrawals, transfers, and payments. With a focus on meeting stringent technical requirements, our system ensures a seamless and secure payment experience by delivering exceptional performance in terms of throughput, latency, availability, and scalability.

Additionally, our team extends support to critical financial domains, actively contributing to the development of high-performance services and financial products dedicated to accounting, finance, and business operations. Through our efforts, ZaloPay can provide instant money transfers, expedited operations, and top-level security measures. As a result, we play a crucial role in ZaloPay's commitment to advancing a cashless society, delivering a wide range of services and enticing offers to our users.

**Responsibilities (You will)**
- Design, build, and maintain large-scale services, data pipelines, tooling, and systems to ensure a direct business impact in ZaloPay’s mission-critical business domains including Product, Merchant, Accounting, Finance, and Business Operations.
- Write clean, efficient, and well-documented code using best practices.
- Debug and resolve complex issues that may arise in the system and address performance bottlenecks.
- Collaborate with cross-functional teams, including product managers, designers, and other engineers to define requirements and deliver high-quality solutions.
- Keep up-to-date with the latest technologies and trends in the industry and identify opportunities for improvement.
- Work in an Agile & collaborative environment involving different stakeholders.
- Able to work in a high-pressure environment.

**Yêu cầu**:

- Bachelor's or Master's degree in Computer Science, Software Engineering, or a related field.
- Have experience with distributed transaction algorithms such as TCC, SAGA, Two-Phase Commit.
- Extensive experience working with databases, including SQL and NoSQL systems.
- In-depth knowledge of database design principles and performance optimization techniques.
- Strong understanding of consensus algorithms, such as Paxos, Raft, or Practical Byzantine Fault Tolerance (PBFT).
- Have experience with distributed caching such as Redis, distributed locking such as ZooKeeper, and distributed event streaming platforms such as Kafka.
- Write high-quality & maintainable codes. We work mostly in Java. However, languages are tools and we care more about your mindset & general engineering skills.
- Have implemented and delivered distributed systems on a large scale.
- Have experience in tracing system problems.

**The following skills would be nice to have**
- Experience with Java technologies: Spring Boot, Reactive Programming, Concurrent/Parallel Programming, Messaging Frameworks,...
- Experience with big-data technologies such as Apache Kafka, Apache Spark, Presto, Apache Flink, and OLAP.
- Experience in optimizing JVM.
- Experience with financial-related platforms/products is a plus.
- Knowing how to work with K8S or cloud services, e.g GCP, AWS... is a big plus.

**Why choosing us**
- At ZaloPay, we develop the CORE transaction processing in-house. We have created a system that can effectively serve the Vietnamese market on a daily basis as well as during high-volume periods such as Tet, holiday, promotion campaign... Our system is scalable, highly available, secure, and can handle a large volume of transactions efficiently while ensuring accuracy and the safety of funds.
- Payment Engine is a high-performing team with team morale high and everyone is happy. We are promoting a positive, innovative, and productive work environment, fostering cross-functional collaboration, and promoting continuous learning and improvement.

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