Job Overview
- Salary
- ¥7,000,000 - 10,000,000/year
- Job Type
- Full-time
- Japanese Level
- None Required
- Category
- Tech & Engineering
Description
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. Requirements 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 Qualifications 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.

Jamm
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Frequently asked questions
- What does Backend Developer at Jamm pay?
- The advertised range is ¥7,000,000–¥10,000,000 per year.
- Does this role offer visa sponsorship?
- Yes, this position is listed as offering visa sponsorship.
- Is this job remote?
- This role is listed as on-site. Location: Tokyo. Employment type: full_time.
- What level of Japanese is required?
- The listing specifies none.