# Jonas Gantar > Full-Stack Software Engineer Location: San Francisco Bay Area, United States Profile: https://flows.cv/jonas Full Stack Software Engineer from Austria with a passion for everything backend and Typescript. Active contributor to the open source community - most recent work under OSLabs as a co-creator of the developer tool KoffeeTable, a containerized Apache Kafka visualizer. Github: https://github.com/TJonasT I am a Austrian Citizen and I have both a valid Social Security Number and a Green Card. Recently spoke on the merits of caching, as a featured speaker in the Jeeny and Bractlet Tech Talk Series. When I'm not coding, I enjoy hiking in the Bay area and practicing BJJ. I'm always eager to jump on new projects or discuss new technologies – if you have something interesting to talk about, get in touch! ## Work Experience ### Software Engineer @ KoffeeTable Jan 2023 – Present | San Francisco, California, United States Developed modular dashboard with React and React router, allowing for seamless navigation between interfaces Create interactive bar, line, and chart graphs using Chart.js, showcasing essential Kafka metrics with minimized delay Implemented a Node.js web server utilizing the Express framework, for extracting and handling a user’s Kafka cluster information, while ensuring secure user sessions through the implementation of RESTful APIs and encryption Constructed an event-driven API architecture, establishing a persistent real-time data flow between server and client Leveraged a Kafka consumer, directly accessing a client’s Kafka datastream, and extracting relevant metrics, including lag time, message velocity, and under-replicated partitions across topics, showing potential inefficiencies Configured an autonomous Kafka cluster to provide the foundation for comprehensive testing and debugging, ensuring optimal UI/UX, and application stability for a throughput of up to 1000 messages per second Migrated from a SQL to a NoSQL database, resulting in an increase of query write/read efficiency by roughly 15% Employed Docker containers to streamline application implementation, and eliminate dependency requirements Utilized Jest to implement unit and integration testing to ensure consistent behavior throughout future CI/CD cycles Leveraged KafkaJS library to replace Java, eliminating the need for a JVM and maintaining a monolingual codebase ### DailyApply | Software Engineer - Job Application Tracker @ Open Source Jan 2023 – Present -Setup OAuth 2.0 authorisation to ensure seamless UX while utilizing the infrastructure and security of Google. -Implemented TypeScript for preemptive error detection, edgecase coverage and to ensure overall high code quality. -Designed and integrated a PostgreSQL schema to build a robust and scalable data management system, facilitating efficient data querying and manipulation while keeping the application ACID compliant. ### Jukebox-Jumble | Software Engineer - Randomized Lyrics Guessing Game @ Open Source Jan 2023 – Present -Improved the efficiency of the application by saving reusable information on the client side and therefore preventing repetitive REST api calls and additionally increased readability and reliability of the codebase by optimizing state. ### Emergency Medical Technician @ Arbeiter-Samariter-Bund Österreichs Jan 2020 – Jan 2021 | Vienna, Austria Acquired the ability to thrive in high-pressure environments and demonstrated strong leadership and collaboration skills. - Lead ambulance teams, providing urgent care for up to 10 patients per 12-hour shift during COVID pandemic - Supported IT activities, managing and optimizing internal system processes and managing shift scheduler for local site - Participated in large-scale events, providing assistance in case of emergencies and ensuring save event progression ## Education ### Software Engineering Codesmith ## Contact & Social - LinkedIn: https://linkedin.com/in/jonas-gantar --- Source: https://flows.cv/jonas JSON Resume: https://flows.cv/jonas/resume.json Last updated: 2026-03-20