Integration Manager (Tokyo, Japan)

Client-Facing & Pre-Sales

• Lead and confidently run client meetings, calls, and technical demos independently, without needing a BD or CS lead to carry the conversation

• Act as the primary technical point of contact during pre-sales and onboarding, scoping integration requirements and setting realistic expectations

• Present technical concepts clearly to both technical and non-technical stakeholders (engineers, producers, executives)

Technical Integration & Troubleshooting

• Guide partners through API integration, including authentication, request/response structures, JSON payloads, and webhook configuration and delivery

• Diagnose issues using data dumps, technical logs, and API traces; distinguish integration errors from platform bugs

• Write and interpret basic scripts or API calls (e.g., via Postman, curl) to reproduce and isolate client-reported issues

• Document issues concisely and completely enough for engineering to act on without back-and-forth

• Know when to resolve an issue directly versus escalate to Engineering, Product, or Support, and manage that handoff cleanly

Cross-Functional Communication

• Serve as the communication hub between Client, Business Development, Customer Success, and Development teams, ensuring nothing gets lost in translation between technical and commercial priorities

• Provide clear, well-organized status updates to internal stakeholders and clients throughout the integration lifecycle

• Maintain accurate documentation in Jira, Confluence, and related tools

Bachelor's degree (or equivalent experience) in a related field

3+ years of experience in technical integration, solutions engineering, or a client-facing technical role

Demonstrated ability to lead client meetings and presentations independently — this is not a support-only or backend role

Working knowledge of REST APIs, JSON, and webhooks; able to read API documentation, interpret payloads, and troubleshoot integration failures independently

Comfortable using tools like Postman (or equivalent) to test and debug API calls

Near-native fluency in both Korean and English, written and verbal; able to confidently lead client presentations and meetings and write professional business emails in either language without support (daily cross-team communication is in English)

Proven customer service or client relationship experience

Comfortable working with high autonomy, shifting priorities, and a significant workload

Strong attention to detail and time management

Prior experience in the gaming industry, payments, or fintech

Experience with Confluence, Jira, and G Suite

Prior experience at a foreign or international company, or working across time zones with global teams

Genuine interest in games (as a player) and the gaming industry