Sung Jin Kang

Software engineer with 11 years of deepening ownership at a single B2B SaaS company, growing from individual contributor to owning platform-level systems across mobile, identity, and AI infrastructure. Specializes in shipping complex cross- functional systems end-to-end, establishing engineering standards, and operating production services at scale. Currently focused on MCP-based platform integrations and agentic AI tooling.

Insightly

• Designed and shipped an autonomous incident investigation system using Claude, MCP integrations, and multi-agent orchestration that aggregates telemetry, error logs, issue tracking, and source code context to surface root-cause analysis with minimal manual intervention.
• Architected the Insightly MCP server, a foundational platform layer enabling secure, AI-driven access to CRM functionality across internal and external integrations, directly driving the company's AI product strategy.
• Led identity platform modernization by extending authentication services with OAuth 2.1, OIDC, and enterprise SSO, enabling strategic enterprise sales and meeting evolving compliance requirements.
• Designed, deployed, and operated AWS-backed production services supporting a globally distributed customer base, with a focus on scalability, reliability, observability, and operational excellence.
• Delivered a full Xamarin-to-Flutter rewrite of the production CRM mobile app as a solo engineer by leveraging Claude-based agentic engineering workflows, dramatically improving maintainability, performance, and cross-platform development velocity.
• Owned production operations, including on-call response, monitoring, incident management, and root-cause analysis using Datadog, Raygun, and Sentry to minimize customer impact and improve system reliability.

• Established in-memory testing patterns and automated test standards adopted across the engineering org, reducing reliance on slow integration tests and improving deployment confidence.
• Led a major refactor of the mobile codebase to Xamarin.Forms, unblocking faster feature delivery and significantly improving cross-platform consistency.
• Expanded automated test coverage using TDD, improving code quality, reducing regressions, and increasing confidence in ongoing refactoring efforts.
• Owned a full UI modernization of the mobile CRM application, including dark mode and accessibility improvements, balancing user experience with long-term maintainability.
• Partnered closely with product, design, and QA to translate evolving requirements into scalable technical solutions and well-defined implementation plans.

• Implemented feature parity between web and mobile clients to ensure consistent workflows, data integrity, and user experience across platforms.
• Developed a mobile WYSIWYG editor and contributed to backend service integrations supporting reliable mobile data synchronization.

Innovative Systems LLC

• Built and maintained Android and iOS companion applications integrated with a legacy payroll system; automated mobile builds via TFS CI.

Primary Technologies: Claude Code, GitHub Copilot, Ollama, LangGraph, AWS (EC2, S3, SQS, SNS, CloudWatch), C#, Dart, Flutter, Python, ASP.NET, REST APIs, OAuth 2.0, CI/CD, MSSQL, Datadog, Sentry, Raygun Data & Messaging Concepts: Event-driven architectures, async processing, queue- based workflows June 2019 – Present Additional Experience: Xamarin, Xamarin.Forms, MAUI, Ruby, Java, C/C++, JavaScript, CSS, SQLite

Bachelor of Science in Computer Science South Dakota School of Mines & Technology, 2013