# Jeff (Sang Yoon) K. > Software Engineer - DevOps | Cloud | TypeScript | React | Node.js | AI Location: San Francisco, California, United States Profile: https://flows.cv/jeffsangyoonk Hello! I create applications with JavaScript/TypeScript, React/Redux, and Node.js/Express. I also build web applications to help clients meet their digital marketing and other business related goals. A recent endeavor of mine is leading the front-end portion of a database version control tool that simplifies schema migrations for more efficient deployment. I have too many hobbies, but the one at the forefront of my brain as of late, is Jiu Jitsu. WIP: http://dittodevtool.com/ GitHub: https://github.com/syjeffkim ## Work Experience ### Software Developer @ eWorld Enterprise Solutions, Inc. Jan 2024 – Present - Transitioned a restrictive no-code platform into a customizable backend framework on Google Cloud Run, enabling advanced logic, greater control, and reducing environment migration errors while improving deployment efficiency by 50%. - Strengthened a webform email system by introducing multiple security layers—including CAPTCHA, honeypotting, and IP blocking— and engineering an automated cleanup script that eliminated spam vulnerabilities and ensured 100% inbox integrity post-deployment. - Developed an AI chatbot on Google Cloud leveraging Dialogflow CX, integrating structured knowledge bases and advanced flow design to improve resolution times and overall customer satisfaction. - Designed and implemented a backend data pipeline to ingest and process data into Google BigQuery, enabling automated analytics and reducing manual data handling. ### Software Engineer @ Ditto (Open Source) Jan 2024 – Jan 2025 An open-source web browser application that enables developer teams to utilize version control for their schema migrations. - Fine-tuned SEO by configuring Webpack and React Helmet to give an overall 92% rating on LightHouse. - Utilized React with Typescript to create the Database Migration Management Dashboard, creating a developer centric UI/UX to monitor Postgres v14+ migrations and updates. - Implemented React-Router, Redux and Redux-Persist to design Ditto’s User to Project to Databases State System in order for secure rehydration, state management and navigation. - Developed the Access Code Sharing Feature utilizing Node.js v20, Typescript, and Express, creating secure and shareable code to streamline engineering team management. - Remodeled backend logic with Express to create an architecture that was efficient for API route handling, reducing server-side boilerplate. - Equipped with Bcrypt, JWT authentication, RBAC as well as providing GitHub OAuth to be SOC 2 and ISO 27001 compliant and uphold quality standards for security so teams feel assured their data is safe. - Hosted the internal database on Amazon RDS for the high availability, security, and reliability in a cloud environment which was essential for maintaining the performance of Ditto’s version control system. - Tested with Jest for unit testing React components, leveraging the powerful mocking and assertion libraries to ensure reliable and thorough testing allowing the app to have over 80% test coverage swiftly. - Constructed a database with PostgreSQL for the strong ACID compliance. PostgreSQL's indexing and powerful joins ensure reliability and rapid data retrieval; perfect to hold user, project and database information. ### Software Engineer @ Open Source Jan 2024 – Jan 2025 Front End | Date Night - Web and Mobile AI Evening Date Generator - Employed React Router to create a single page application experience for simplicity and performance, crucial for an app designed to help couples find impromptu, yet tailored date suggestions quickly. - Dispatched OpenAI’s advanced natural language processing capabilities and control to format data accordingly and give user’s unique suggestions. Full Stack | Time Together - Web App To Find Free Time With Friends - Constructed with TailwindCSS to design the Client Login and Sign Up Portal which streamlined development and built an aesthetically pleasing user interface/experience. - Collaborated with project management to organize planning of the front-end team’s responsibilities to upheld agile development principles. ### Web Developer @ Unknown Jan 2023 – Jan 2025 - Deployed customer facing applications on Netlify for the SSL certification and simplified incorporation of GitHub that allowed for continuous integration/continuous deployment as well as the easy to configure custom domain names. - Drafted with Figma to visually communicate with clients their specific product requirements. ### Human Resources Manager @ Mikuni Restaurant Group, Inc. Jan 2021 – Jan 2023 - Led end-to-end recruitment processes and successfully implemented comprehensive training plans, resulting in a 16% decrease time till significant internal promotions for employees. - Designed cleared employee protocols per position, leading to 50% increase in length of employee tenure - Fostered positive employee relations through effective communication and conflict resolution. - Revamped and optimized the onboarding procedures, resulting in a 30% reduction in employee onboarding duration and a general consensus of boost in employee satisfaction. - Managed ADP payroll, ensuring accurate and timely processing of payroll transactions. - Implemented and executed marketing strategies to enhance the employer brand and attract top talent. - Conducted employee onboarding and orientation sessions to facilitate seamless integration into the company culture. - Provided support in creating and maintaining HR policies and procedures. - Provided information about health benefits packages, FMLA, CRFA, and employment laws. ### Operations Manager @ Mikuni Restaurant Group, Inc. Jan 2020 – Jan 2021 | Davis, California, United States ### Bartender @ Mikuni Restaurant Group, Inc. Jan 2019 – Jan 2020 | Davis, California, United States ## Education ### Bachelor of Science - BS University of California, Davis ## Contact & Social - LinkedIn: https://linkedin.com/in/syoonk32 - Website: https://mynameisjeffkim.netlify.app/ --- Source: https://flows.cv/jeffsangyoonk JSON Resume: https://flows.cv/jeffsangyoonk/resume.json Last updated: 2026-03-20