Backend Engineer

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

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.

Requirements:

• 4+ years of experience using Java in a professional environment, or if you are a non-Java user, excellent skills in general-purpose 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 English or Japanese.

Preferred Qualifications:

• Experience with implementing platform components such as RESTful APIs, Pub/Sub Systems, and database clients.
• Experience with AWS services.
• Experience in working on system development in finance, payment, or similar industries.
• Experience in system design and development of web system which handles massive amount of transactions or require 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.

Tech Stack:

• We select the best combination of tech at times.
• Java, Kotlin, Scala
• Spring Boot, JUnit, Resilience4j, 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