PayPay is looking for a Backend engineer to work on our payment system to deliver the best payment experience for our customers.

Main Responsibilities

Design large scale systems with high complexity to support our high throughput applications.
Understand how to leverage infrastructure for solving such large scale problems.
Develop tools and contribute to open source wherever possible.
Adopt problem solving as a way of life – always go to the root cause! Support the code you write in production.

Tech Stack

We select the best combination of tech at times.

| Java, Kotlin, Scala

| Spring Boot, JUnit, Reselience4j, Feign

| MySQL/AuoraDB, DynamoDB, ELK, Kafka, Redis, TiDB

| Docker, Kubernetes, ArgoCD, AWS, GCP

| GitHub, IntelliJ, Gradle, Maven, npm/yarn, Flyway, Jenkins, snyk,

| Bigquery, Kibana, Spark

| PlantUML, draw.io, miro.com

| Slack, Zoom

Qualifications

3+ years of experience in using Java under professional environment, or if you are non-Java user, excellent skills in generalized programming languages, such as Scala, Python and Go.
Interest and ability to learn other coding languages as needed.
Experience with NoSQL databases and distributed cache.
Strong fundamentals in data structures, algorithms and object oriented programming.
In-depth understanding of concurrency and distributed computing.
Degree in Computer Engineering or Computer Science or 3+ years equivalent experience in SaaS platform development.
Business of English or Japanese

Preferred Qualifications

Experience with implementing platform components such as RESTful APIs, Pub/Sub Systems, Database Clients.
Experience with AWS services.
Experience in working for system development in finance, payment, or similar industries
Experience in system design, development of web system which handles massive amount of transactions or requires scalability
Language ability in Japanese and English is a plus (We have a professional translator but it is nice to have language skills)
Experience in microservices

Backend Engineer