# Senior Software Engineer - New Markets Japan

**Company:** [Alpaca](https://hotfix.jobs/companies/alpaca)
**Location:** Remote
**Role:** Backend Engineering
**Experience:** 5+ years
**Skills:** Go, Rust, Java, Kotlin, C#, Scala, C++, gRPC, REST APIs, Microservices, Financial Apis, Market Data, Trade Settlement, Domain-Driven Design, Event-Driven Design
**Posted:** 2026-08-12

> Senior backend engineer designing and operating scalable brokerage and financial systems for Japan, including market integrations, accounting, settlement, and regulatory requirements. Requires JLPT N1-level Japanese, business English, strong financial-systems expertise, and proficiency in a statically typed language.

## Job Description

## Responsibilities
- Design highly scalable, mission-critical brokerage systems for the Japan market.
- Develop and enhance middle- and back-office systems, including gRPC microservices, REST and gRPC APIs, and third-party vendor integrations for the Japan market.
- Enhance the core framework to support multiple languages, currencies, and markets, including Japan-specific requirements such as NISA, MyNumber, withholding tax, and JP-GAAP accounting.
- Collaborate with regional technical leads and global engineering teams.
- Coordinate in Japanese with local regulators, vendors, partners, and business stakeholders, translating requirements into technical specifications.
- Troubleshoot incidents and bugs to maintain system integrity and performance.
- Participate in on-call rotations and support production issues during Japan business hours.
- Contribute to regional recruitment, cross-functional projects, engineering practices, mentoring, and team culture.

## Requirements
- Native or JLPT N1-level Japanese fluency, including professional reading, writing, and communication.
- Business-level English fluency for meetings, design discussions, code reviews, and documentation.
- Experience designing and developing complex financial systems, preferably including double-entry accounting.
- Strong understanding of accounting principles, ledger structures, and transaction reconciliation.
- Experience building scalable, highly available financial applications handling multi-currency transactions.
- Familiarity with financial-market regulatory compliance, preferably in Japan.
- Proficiency in at least one statically typed language, such as Go, Rust, Java, Kotlin, C#, Scala, or C++.
- Experience with financial APIs, market-data integrations, and trade-settlement processes.
- Strong computer-science fundamentals and software-architecture experience.
- Ability to work independently in a fully remote, globally distributed team.
- Strategic thinking, strong problem-solving skills, and the ability to translate technical concepts into business strategies.
- Experience with domain-driven design and event-driven design.
- Ability to lead and troubleshoot incidents or bugs during Japan business hours.

## Nice-to-haves
- Proficiency in Go or willingness to learn it quickly.
- Experience in Japan's financial-services sector.
- Experience integrating with JPX, JSCC, JASDEC, or major Japanese banks.
- Experience with NISA, iDeCo, tokutei-koza, or MyNumber handling.
- Experience at a startup or fast-growing technology company.
- Knowledge of emerging technologies and passion for financial markets.
- Experience managing vendors and organizational budgeting.
- Experience working with global, English-speaking teams across multiple time zones.

## Compensation and benefits
- Competitive salary and stock options.
- Health benefits.
- One-time USD $500 new-hire home-office setup benefit.
- USD $150 monthly stipend via a Brex Card.

## Similar jobs

- [Senior Software Engineer, Backend (Money Movement)](https://hotfix.jobs/jobs/8afb425b-fe94-4b6b-8b26-f8dde0de4f58) - Phantom - Remote
- [Senior Software Engineer - Ledger](https://hotfix.jobs/jobs/e938791e-3794-4e84-a001-99a398e81a4c) - Alpaca - Remote
- [Senior Backend Engineer, Core APIs](https://hotfix.jobs/jobs/81121cc0-579a-4c8d-ae6f-accddd1b2195) - Fingerprint - Remote - $150k – $200k/yr
- [Senior Software Engineer, Test Core](https://hotfix.jobs/jobs/f33409a0-62e5-4cca-9887-eb5fbd75e55f) - Vanta - Remote - $195k – $229k/yr
- [Sr Backend Software Engineer, Recording](https://hotfix.jobs/jobs/02b0af1b-627d-41f9-81cd-5ee4f4d0cf86) - Scribe - Remote - $145k – $230k/yr

**Apply:** https://hotfix.jobs/jobs/f2b96a35-7d09-46df-ad1d-71d93d9a75c7
**Canonical:** https://hotfix.jobs/jobs/f2b96a35-7d09-46df-ad1d-71d93d9a75c7