Backend Engineer

Job Description:

PayPay India 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 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:

- 4+ 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 5+ 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

- Experience in microservices

- Leverage AI/LLM-based tools in daily workflows (e.g., code development, reviews, testing, debugging, documentation), while ensuring human oversight, judgment, and accountability drive the final product.

Remarks :

- Please note that you cannot apply for PayPay (Japan-based jobs) or other positions in parallel or in duplicate.

PayPay 5 senses :

- Please refer PayPay 5 senses to learn what we value at work.

Skills

Scala, Python, Golang, Backend Architecture, NoSQL, Microservices Architecture, Payment System, Java, Spring Boot, Data Structure, Algorithm