Performance Software Engineer - .NET & Enterprise Systems Expert

Soo Yun Kim

*********@*****.*** 226-***-**** Toronto, ON Portfolio LinkedIn Github

Performance-driven Software Engineer with 5 years of experience designing and scaling mission-critical enterprise applications, specializing in C#/.NET and MSSQL, and known for maintaining 99.9% system availability through proactive optimization and CI/CD-driven DevOps within Agile environments. CORE COMPETENCIES

● Application Development: Enterprise Application Delivery, Application Maintenance, Application Integration, Applications Architecture

● Software Engineering Practices: SDLC, Agile Methodology, CI/CD, System Design

● Professional Skills: Detail-Oriented, Active Learning, Group Problem Solving, Emerging Technologies TECHNICAL SKILLS

● Languages: C#, Java, JavaScript, TypeScript, Python, C++, HTML, CSS, VBScript

● Frameworks: .NET (Core, Framework, ASP.NET, WPF, WinForms), Spring Boot, Spring MVC, React Native, Expo, Node.js

● Databases: MSSQL, MariaDB, Oracle, PostgreSQL

● Data Management: Stored Procedures, Data Modeling (ERDs), Batch Processing, Data Mapping

● Cloud: AWS (EC2, S3, CloudFront, Route 53), Supabase, Cloudflare Pages

● APIs & Integration: RESTful APIs, JSON, XML

● DevOps: CI/CD Pipelines, GitLab CI/CD, Docker

● Tools: Git, SVN, JIRA, Confluence, Visual Studio, Eclipse, Visual Studio Code

● Domain Expertise: Enterprise Systems (MES, CRM, WMS, S&OP, Groupware), System Integration, Incident Resolution, Root-cause Analysis, Workflow Optimization, Real-time Monitoring Systems WORK EXPERIENCE

LG CNS Canada May 2024 – Jun. 2025

Software Engineer Windsor, ON

● Designed, enhanced, and maintained large-scale C#/.NET enterprise applications supporting high-volume transactional data in live production environments.

● Performed root-cause analysis, debugging, and performance tuning for mission-critical systems, consistently maintaining 99.9% availability and resolving production incidents within 5 minutes.

● Developed and maintained RESTful APIs integrating MES/WMS platforms with upstream and downstream enterprise systems.

● Improved database performance and scalability by implementing advanced MSSQL indexing strategies, significantly reducing query latency and eliminating data bottlenecks.

● Took ownership of WMS production systems on short notice, achieving two consecutive months of zero downtime through rapid system onboarding and proactive monitoring.

● Collaborated in Agile SDLC environments using JIRA and Confluence for release planning, incident tracking, and documentation.

Navien Sep. 2022 – Feb. 2024

Software Engineer Seoul, South Korea

● Designed and implemented enterprise applications by integrating C#/.NET and Java/Spring backend services with JavaScript-based frontend interfaces.

● Designed and implemented batch-processing data pipelines using MSSQL stored procedures, stabilizing cross-platform system integrations and eliminating recurring operational downtime.

● Developed and optimized RESTful APIs and microservice-style components to support ERP(SAP)–CRM integrations and logistics platforms.

● Conducted large-scale MSSQL data analysis and modeling to support business operations, planning systems

(S&OP), and cross-department reporting requirements.

● Improved system performance and user adoption by refactoring UI components and optimizing backend processing logic, increasing active user adoption from 30% to 90% on a Java/Spring-based logistics tracking platform.

● Reduced annual licensing costs by approximately 20M KRW by identifying inactive users and automating account deactivation through Oracle SQL–based user lifecycle management.

● Deployed and maintained applications in AWS environments (EC2, S3, CloudFront, Route 53), supporting scalable and secure service delivery.

● Participated in CI/CD pipelines and Agile development processes, collaborating with stakeholders to estimate effort, prioritize requirements, and deliver high-quality releases. GL Jun. 2020 – Aug. 2022

Software Developer Daegu, South Korea

● Developed and maintained C#/.NET desktop applications for clinical and enterprise environments, focusing on system reliability and data accuracy.

● Designed and implemented relational database schemas and managed application data using MariaDB.

● Engineered a TCP/IP-based data transmission system supporting multi-month production usage with zero data loss or synchronization errors.

● Conducted application testing, debugging, and performance optimization to improve system stability and user experience.

● Produced and maintained technical documentation supporting system enhancements and long-term maintenance.

EDUCATION

University of Washington Bothell Sep. 2017 - Jun. 2019 Bachelor of Science, Computer Science & Software Engineering Bothell, WA Shoreline Community College Jan. 2016 - Jun. 2017

Associate of Arts, Computer Science Shoreline, WA

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