About Paidy Inc.

Paidy is Japan's pioneer and leading BNPL service company. At Paidy we believe in creating simple, instant experiences to take the hassle out of shopping with a touch of magic.

Paidy offers instant, monthly-consolidated credit to consumers by removing hassles from payment and purchase experiences. Paidy uses proprietary models and machine learning to underwrite transactions in seconds and guarantee payments to merchants. Paidy increases revenue for merchants by reducing the number of incomplete transactions, increasing conversion rates, boosting average order values, and facilitating repeat purchases from consumers.

Paidy has reached an agreement to join PayPal, the global payments company. Paidy will continue to operate its existing business, maintain its brand and support a wide variety of consumer wallets and marketplaces by providing convenient and innovative services.

Paidy continues to innovate to make shopping easier and more fun both online and offline. For more information, please visit http://www.paidy.com.

About Position

We are looking for a passionate, innovative and dedicated Senior Software Engineer, who is ready to make an impact by developing and improving backend systems (as well as some frontend systems), as well as directly communicating with Paidy’s merchants.

The Senior Software Engineer is responsible for building and maintaining the technical infrastructure that powers Paidy's merchant platform, including onboarding systems, merchant dashboards, and third-party integrations with e-commerce platforms. You will architect and deliver API solutions, SDKs, and integration tools while ensuring high system availability, performance optimization, and robust operational support. As a senior member of the team, you'll drive architectural decisions, collaborate with product and business stakeholders to translate merchant requirements into technical solutions, and support the establishment of engineering best practices that balance rapid feature delivery with system reliability and security.

Key Role and Responsibilities

Communicate with the team lead and the head of the department to align on the technical direction of projects and provide support in translating the direction to actionable tasks
Assist in requirement identification and translate requirements into technical specifications
Design, develop, and deliver new features on our backend services by collaborating with distributed and multidisciplinary teams
Develop software with strong focus on legal, regulatory and compliance requirements
Proactively participate in diagnosing and preventing production incidents through fail-safe technical designs
Ensure code, APIs and data handling practices comply with established organizational and industry standards
Provide guidance and mentorship to junior engineers

Our tech stack:

AWS architecture
Scala (cats-effect)
Postgres
Aurora
Akka
Kafka
Cassandra
Elasticsearch
Docker
Terraform
CircleCI
DataDog

Skills and Requirements

Required skills:

Experience in Scala and functional programming
At least 5 years of experience working as a backend engineer in an Agile environment
Knowledge of Git
Quality code and testing: legibly written code that is easily understood by others
Address debugging with a systematic approach
Understand automated testing with a desire to suggest relevant improvements
Ability to understand code independently and make intelligent inferences to code in the broader context
Experience in software architectural planning and making architectural design decisions that align with the overall service architecture
Basic understanding of security measures and how they may implicate the wider system
Cross-team collaboration experience, comfortable with knowledge sharing and building relationships
Show interest in the organization’s engineering strategy, product development strategy and how that aligns with the overall business strategy
Experience in stakeholder alignment and non-technical collaborative communication, including translating technical designs to non-technical business stakeholders

Nice to have:

Preferably relevant experience in other technologies and concepts that we use at Paidy:

Cassandra, Kafka, Postgres, Functional Programming, REST API, microservices architecture, JSON, Avro, CI/CD, AWS, Fargate, Terraform, Git, Data streaming, ElasticSearch, Redis, Event Sourcing, unit/functional testing, cats, cats-effect, tagless final, CQRS, event sourcing

Solid understanding of event sourcing in Kafka
Experience building distributed systems
Experience with Akka Cluster and Persistence
Experience with TDD
Understand cross-team interdependencies and work streams
Ability to envision delivery roadmap and articulate this clearly for others to follow
Build relationships with stakeholders throughout the organization
Understand product opportunities, differentiators and competition
Knowledge of cloud computing platforms such as AWS
Experience building distributed systems
Demonstrate technical leadership and mentorship to junior engineers

The Paidy team will ask about your user experiences with Paidy Apps during the interview. Please download the Paidy App and try it out!

iOS: https://apps.apple.com/jp/app/paidy/id1220373112
Android: https://play.google.com/store/apps/details?id=com.paidy.paidy&hl=en&gl=US

For those who are not able to download Paidy App, due to the regional restrictions, please be advised that you download the similar App, such as Klarna, Afterpay, Affirm and so forth, and come up with your opinions on these applications and services.

What We Offer You

Diversified team with 220+ colleagues from 30+ countries
Exciting work opportunities in a rapid-growing organization
Cross-functional collaboration and an opportunity to interact with Japan’s biggest e-commerce merchants
Hybrid remote work model - minimum 2 times in office per week (subject to change at company discretion)
Competitive salary and benefits

Paidy Values

Be a winner / 勝ちにこだわる

Always seek to beat expectations. / 期待値を超える為に常に努力する。
Display surprising speed and resourcefulness. / 人をスピードと機知で驚かす。
Overcome weaknesses by leveraging the strength and help of others to win. / 仲間の強みを活かしたり協力を得ることで、自身の弱みや足りない点を克服する。

Own it and deliver, together / 共に結果を出す

Fully support the final decision even if at times you may disagree. / たとえ意見が対立することがあったとしても、最終決定を全面的に受け入れ支持する。
Acknowledge and gather the power of others, by communicating and collaborating with them. / 仲間の力を認めて活用し、積極的にコミュニケーションをとり、協力する。
Show a will to own actions and go the extra mile without being asked. / 行動について強いオーナーシップを持ち、言われずとも業務を遂行しきる覚悟を持つ。

Be a valuable team member / 価値を認められるメンバーになる

Strive to play an integral role. / 替えの効かない役割を果たす。
Embrace and bridge differences in perspective, language, and culture. / 異なる意見・考え方、言語と文化の架け橋になる。
Don’t compromise - raise the bar for yourself and others. / スタンダードを上げ続けることに妥協しない。