Principal Backend Engineer

Location: Tokyo - Hybrid

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Overview

Are you looking:

• To make meaningful changes at a fast-growing tech company?
• For a fair, highly flexible, inclusive working environment where anyone, regardless of their background, can make an impact?
• To build the next bold idea in customer acquisition and revenue growth through conversational commerce technology?
• For a place where things don't just move fast—they happen now?

Our mission: Revolutionize hospitality on the Internet by unlocking digital customer service experiences previously limited to physical stores.

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About the Role

As a Principal Backend Engineer, you won’t just write code—you will own systems end-to-end, shape architectural strategies, and influence technical direction across teams. As a key technical leader in the backend domain, you will design scalable, fault-tolerant systems that power mission-critical services, accelerating the impact of our conversational commerce platform.

This role is not about following roadmaps—it's about creating them. You'll work across teams to raise the engineering bar, mentor senior engineers, and drive strategic decisions that shape our product and infrastructure for years to come.

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What You’ll Do

• Drive architecture and design of complex, distributed backend systems focusing on scalability, reliability, and performance.
• Lead initiatives to modernize legacy systems and migrate to robust, decoupled services using Golang, gRPC, and REST.
• Own high-stakes technical decisions, balancing trade-offs and setting standards for software design across teams.
• Ensure best practices in clean code, DDD, testing, observability, and documentation are deeply embedded in the development lifecycle.
• Collaborate with engineering leadership, product managers, and stakeholders to align backend capabilities with business priorities.
• Foster a culture of technical excellence through mentorship, knowledge sharing, and collaborative problem solving.
• When required, participate in the on-call rotation and act as a technical escalation point for critical incidents.

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What You'll Need

• Proficiency in development flow based on git and GitHub.
• 8+ years of experience in Software Engineering or a similar role, with preferred experience in Golang.
• Strong sense of testing, including unit and integration tests.
• Ability to recommend improvements to current systems, processes, and services as needed.
• Adaptability in a dynamic and ever-changing environment.
• Strong problem-solving skills: ability to identify sources of issues and implement/test solutions.
• Proven team-leading experience with ability to mentor and guide team members.

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Bonus Points

• Hands-on experience with Docker, Kubernetes, and cloud-native infrastructure (preferably GCP).
• Familiarity with CI/CD pipelines (e.g., CircleCI) and engineering operations tooling (e.g., Jira).
• Experience working with polyglot environments (e.g., Python, Ruby, Node.js).
• Japanese language proficiency is a plus, but not required.

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Our Tech Stack

• Backend Languages: Go, Python, Elixir
• Frontend Languages: HTML, CSS, JavaScript (TypeScript, React.js, Recoil, Zod, Tanstack, etc)
• Infrastructure: Google Cloud Platform, GCP Pub/Sub, Kubernetes, MongoDB, MySQL, Postgres, BigQuery, Elasticsearch, Qdrant
• Configuration Management: Terraform
• CI/CD: Github Actions, ArgoCD, CircleCI
• Monitoring: Grafana, GCP Cloud Monitoring, GCP Logging, GCP Cloud Trace, Opsgenie
• Data: BigQuery, Parquet, Spark, Scala, Python, dbt
• Knowledge Tools: Confluence
• Other Tools: GitHub, Slack, Jira
• Process: Scrum

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Benefits & Perks

• Salary: Competitive
• Performance Review: Twice a year
• Holidays: 10 days of annual leave in the first year, weekends off, national holidays, summer and winter breaks, 5 refreshment leave days per year
• Visa Support: Yes
• Flexible Working: Highly flexible, remote-first (in Japan), interim work from overseas
• Housing Allowance: Within 1.5KM of office
• Club Activity Allowance
• Team Building & Lunch Allowances
• Regular Social Events: Bi-monthly company parties

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Why Join?

• Twice awarded LinkedIn Top Startups
• Collaborative, inclusive, and high-impact work environment
• Opportunity for global market expansion and significant technical leadership

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Ready to roll up your sleeves? Join us to help bring hospitality to everyone.

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