Backend Engineer, Go - Processing / Infrastructure DevelopmentEnglish summary from Japanese

株式会社 UPSIDER

✓ Detailed

Salary

当社規定による。賞与あり(半期に一回、グレードや実績によって支給)

Location

フルリモートワーク東京オフィス

Job Type

Full-time

Work Style

フルフレックス、フルリモート、土日祝日休み、有給休暇あり、年末年始、夏季休暇、出産育児休暇制度あり

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Role summaryEnglish summary from Japanese

English summary for screening — check the original posting before applying.

UPSIDER is seeking a Backend Engineer to develop their global financial platform, specifically the core payment system for their corporate card service, "UPSIDER Card." You will contribute to functional enhancements and non-functional aspects to ensure a secure and convenient payment experience for users.

Must-haves

Practical experience with Go language
Ability to consider and implement business requirements and designs
Development experience with modern architectures (microservices, DDD)
System operation experience
Experience communicating with other departments
Practical experience with Agentic Coding (Claude Code, Codex/Devin)

Nice-to-haves

Design/implementation skills considering scalability, robustness, extensibility, and testability
Experience leading teams, projects, or technical decisions
Experience with complex domains like payments
Development experience with platforms or cloud infrastructure

Tech stack

Work style

Full remote, full flex. Tokyo Office location. Text communication in Japanese and English; oral communication primarily in Japanese.

Other notes

Salary determined by company regulations. Bonus twice a year. Probationary period of 6 months. Includes startup leave, transportation expenses, company laptop, and social insurance.

About the Company