Jamm
Backend Developer
Salary
700万 - 1000万
Location
Tokyo
Remote
On-site / hybrid
Visa
Sponsorship available
Language
Japanese: Not Required / English: Business Level
Posted
Jan 22, 2026
Go
AWS
PostgreSQL
gRPC
Terraform
Apply now
Review the role details and submit your application.
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Overview
About
We're looking for a backend engineer to design and build systems that power payment infrastructure. You'll own features end-to-end, from database schema design through deployment, and work alongside a small, tight-knit team of experienced engineers who ship fast and iterate constantly!
Responsibilities
- Design, implement, and maintain high-performance backend services in Go.
- Architect scalable data models and database schemas for new product features.
- Build and operate workflow orchestration systems to handle complex payment sequences.
- Identify and address technical debt while balancing rapid delivery timelines.
- Participate in peer system design reviews and thorough code reviews.
- Monitor, debug, and continuously improve overall system reliability.
Required Skills
- Experience: At least 1 year of professional backend software development experience.
- Technical Proficiency: Strong proficiency in Golang and relational database design (PostgreSQL preferred).
- Orchestration: Experience with workflow orchestration systems such as Temporal or AWS Step Functions.
- System Design: Solid understanding of distributed systems patterns and architectural trade-offs.
- Delivery: Proven track record of delivering stable features in production environments.
- Documentation: Experience writing technical design docs, API specs, or SDK documentation.
Preferred Skills
- 2–5 years of professional software development experience.
- Experience shipping a product from zero to production (strongly preferred).
- Background in Fintech or Payments industries.
- Familiarity with Infrastructure-as-Code (Terraform) and gRPC/Protocol Buffers.
- Experience working in early-stage, fast-paced companies.
- Familiarity with fullstack, mobile, or modern frontend frameworks.
Quick Facts
CompanyJamm
LocationTokyo
Salary700万 - 1000万
RemoteOn-site / hybrid
VisaAvailable
LanguageJapanese: Not Required / English: Business Level
Interested in this role?
Submit your application for this role at Jamm.