Manage Kyash’s B2B payout business with the business owner, shaping strategy, roadmaps and product development while strengthening partner and financial-institution relationships. The role also leads team management and company-wide business development.
About this role
The server-side engineer develops and operates backend systems for Kyash, a digital wallet service that supports Visa card issuance, payments, transfers between users, split payments, and real-time spending management. The role covers server-side development across the service and involves working with development members, product managers, and designers.
Responsibilities may include designing, developing, and operating mobile API servers and microservices; building systems for payment, clearing, and settlement related to Visa and QUICPay; and designing, developing, and operating connection systems with banking systems. The role also includes accurately understanding external specifications, accumulating that knowledge internally, and coordinating requirements and conducting technical interviews with external stakeholders.
The development language is Go. The infrastructure uses AWS services including ECS, Fargate, Lambda, Aurora, ElastiCache, SQS, SNS, S3, KMS, CloudFront, API Gateway, and Systems Manager. Databases include PostgreSQL, MySQL, and Redis. Operations tools include Terraform and Ansible. Other named tools are GitHub, CircleCI, Docker, Datadog, PagerDuty, Slack, and Jira.
Kyash operates a fintech digital wallet and is organizing development into mission-oriented teams, including payment, fraud prevention, and growth teams. The work location is in Kita-Aoyama, Minato, Tokyo, Japan. The employment type is full-time. The posting describes a selection process consisting of document screening, first and second interviews, a final interview, and an offer meeting.
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