Software Engineer, ZaloPay (Java - Core Payment)

Top 3 reasons to join us

• Attractive salary & benefits you'll love
• Building large-scale products
• Working in one of the best places to work in VN

Job description

The Payment Core 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 to own critical financial domains, including Accounting, Finance, and Business Operations. This domain involve managing user and partner funds, as well as maintaining daily records of ZaloPay transactions in accordance with accounting standards.

Through our efforts, ZaloPay can provide instant payment, 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.

Your skills and experience

Requirements (You may be fit for this role if you)

• 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.
• 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.
• Experience with front-end development, especially with ReactJS

Why you'll love working here

We hope VNG is a place where you build your career. Whether you want to pursue to be a manager or focus on professional development, we acknowledge and appreciate your talents. Therefore, we open up to you more promotion opportunities in VNG, and designed program to help you succeed in every single career path. 

NO SUIT, NO TIE: At VNG, we do not have many rules because we respect you and want to make comfortable atmosphere to help employees perform their jobs well.

Company “pay” for you: Lunch, parking, swimming, learning English or gym for free and you know you are really in care.

NO BARRIERS: Office of VNG is an open space because we always try to remove all barriers to help members easily shares with each other.

Being a big family: Like a gift for family day. A party for the kids. We know how much your family matters.

NO RANK At VNG, members are encouraged to contribute ideas and debate with the others.

Be explored: Ph.D., un-academic guy, bookish girl, fashion designers ... VNGers are different and this diversity makes life more colorful.

NO "OFFICE": Office is like your home. You can hang paintings, plant trees, even feed aquarium on the desk.

Be showed your best: VNGers like to "mortification" with the group games such as: Fansipan climbing, waterfall rafting, go over heat mats; there activities not only are tightening friendship, but also practice their bravery.

GAMING: Even if you do not make the game, stealing beans in the boss’s garden or versusing with your colleagues in a sword competition play online is also an interesting way to relax.

Changing the world: Creating an entertainment channel, building a social network and developing a game. On the Internet world, every single thing you did can change the lives of many people.

Let’s join VNG to share our mission: 'MAKE THE INTERNET CHANGE VIETNAMESE LIVES'