Backend Engineer

PayPay India; Gurugram District; On-site; INR 1,500,000 - 2,500,000; Full time

Job summary

PayPay India is seeking a Backend engineer to design and build scalable payment systems, ensuring fast, reliable experiences for customers.

Role focuses on large-scale system design, concurrency, and distributed computing, with exposure to Java, Kotlin, Scala and modern data stores across AWS and microservices. Open to growth in a fintech context with emphasis on production stability.

Qualifications

• 4+ years of professional experience with Java or strong skills in Scala/Python/Go.
• Experience with NoSQL databases and distributed cache.
• Strong fundamentals in data structures, algorithms and OOP.
• Deep understanding of concurrency and distributed computing.
• Degree in Computer Engineering or CS or 5+ years SaaS experience.
• Business proficiency in English or Japanese.

Responsibilities

• Design large-scale systems with high complexity to support 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 practice – debug to root cause and support production code.

Skills

Java

Scala

Kotlin

Distributed systems

Concurrency

Data structures & algorithms

English/Japanese capability

Education

Bachelor's degree in Computer Engineering or Computer Science

5+ years SaaS platform development experience

Tools

Spring Boot

JUnit

Resilience4j

Feign

MySQL

AuroraDB

DynamoDB

ELK

Kafka

Redis

TiDB

GitHub

IntelliJ

Gradle

Maven

npm

yarn

Flyway

Jenkins

snyk

BigQuery

Kibana

Spark

PlantUML

draw.io

miro.com

Slack

Zoom

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.

We select the best combination of tech at times.

• Java, Kotlin, Scala
• Spring Boot, JUnit, Reselience4j, Feign
• MySQL/AuoraDB, DynamoDB, ELK, Kafka, Redis, TiDB
• 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.