Backend Software Engineer – Finance Super App

BJAK

Backend Engineer responsible for building APIs and systems for BJAK's finance super app in Korea. Collaborating with product and mobile teams to deliver scalable financial infrastructure.

Posted 7/5/2026full-timeRemote • 🇰🇷 South KoreaMid-LevelSeniorWebsite

About the role

Key responsibilities & impact

Build backend services, APIs and workflows for the finance super app.
Support products across insurance, payments, wallet, savings, investing, travel and financial services.
Design reliable systems for user accounts, transactions, partner integrations, reconciliation, notifications and operations.
Work with product and mobile teams to ship customer-facing journeys quickly.
Integrate with banks, payment gateways, insurers, data providers and other partners.
Improve system reliability, observability, security and performance.
Build systems that are practical, auditable and ready for regulated financial products.

Requirements

What you’ll need

3+ years of backend engineering experience.
Strong fundamentals in APIs, databases, system design and production debugging.
Experience building scalable services and integrating third-party systems.
Good understanding of security, reliability, data quality and operational edge cases.
Able to make practical trade-offs between speed, quality and risk.
Comfortable working with product, mobile, operations and business teams.
Experience in fintech, payments, insurance, lending, banking or regulated products is a strong advantage.

Benefits

Comp & perks

Health insurance
Remote work options

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

APIsDatabasesProduction DebuggingScalable ServicesSystem ReliabilityData QualityOperational Edge CasesSecurity

Soft Skills

CollaborationPractical Trade-Offs