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🌿
open hearts, open code

Timothy Kim timothytkim

🌿
open hearts, open code
Software Engineer building reliable backend & data systems with Java, Python & SQL | APIs, Analytics & Open Source

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timothytkim /README.md

Hi, I'm Timothy 👋

Software engineer and data-focused problem solver working across backend systems, analytics, quality, and open source.

I have professional experience in software development at Infosys and network QA at Samsung Electronics America, with hands-on work across backend development, testing, data analysis, and software quality.

I primarily work with Java, Python, SQL, and Tableau. I enjoy understanding existing systems, solving practical problems, writing reliable tests, validating results, and turning data into useful insights.

🛠 Tech Stack

Software & Backend

Java · Spring Boot · Python · FastAPI · REST APIs

Data & Analytics

  • Tools: SQL (Oracle, MySQL) · Tableau · pandas · R · Excel · Google Sheets
  • Methods: Data Cleaning · Data Validation · Analysis · Visualization · Ad Hoc Reporting

Testing & Engineering

JUnit · Mockito · PiTest · Maven · Git · GitHub · CI/CD · Agile/Scrum

Systems & Cloud

Linux · Docker · AWS · Azure · Terraform · EKS

💼 Experience Snapshot

  • Infosys — Software Engineer supporting Lumen Technologies: Delivered production Java backend improvements, wrote and optimized Oracle and MySQL queries, designed JUnit tests, investigated performance issues, and supported CI workflows in Agile teams.

  • Samsung Electronics America — Network QA Engineer I (via Harvey Nash): Evaluated network performance, stability, and software behavior across multiple device platforms; used Linux test-server workflows and partnered with development teams to reproduce and resolve defects.

📚 Training & Certifications

  • Google Data Analytics Certificate: Hands-on analysis and data visualization using SQL, R, Excel, Google Sheets, and Tableau.

  • Infosys Certified Software Programmer — WebIDE (2024): Java, Oracle SQL, object-oriented programming, and enterprise application/database development.

🌱 Open Source

I actively contribute to established open-source projects through bug fixes, API improvements, testing, validation, and maintenance work.

Recent contributions include:

  • Flinkboot Worked on Java API extensions for Apache Flink TypeHint / TypeInformation, POJO validation, unit tests, and documentation.

  • CodeMonk Added Redis cache unit and edge-case tests using JUnit and Mockito.

  • Kaoto / camel-catalog Worked on Java resource loading, enum compatibility, tests, rebasing, and CI feedback.

  • nv-i18n Improved Java test quality and used mutation testing to identify coverage gaps.

Through open-source work, I've gained practical experience working with existing codebases, Maven builds, CI failures, rebases, merge conflicts, test failures, and maintainer code review.

📌 Selected Projects

FastAPI backend for food image recognition and nutrition analysis using Python, TensorFlow Lite, and external APIs.

Focus: Python · FastAPI · REST APIs · ML Integration · Data Processing

End-to-end data analysis project using SQL, R, Google Sheets, and Tableau to clean and analyze behavioral data, identify usage patterns, and communicate actionable findings.

Focus: SQL · Data Cleaning · R · Tableau · Business Analysis

Offline-first Flutter application built around structured local data, clean architecture, and daily progress tracking.

Focus: Flutter · Application Architecture · Local Data · Product Development

🎯 Areas of Interest

Software Engineering · Backend Engineering · Data Engineering · Data Analytics · Operational Analytics · Data Visualization · APIs · Data Systems · Open Source


LinkedIn · GitHub

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  1. Flinkboot Flinkboot Public

    Forked from Sekelenao/Flinkboot

    Enterprise-Grade Safety & Zero-Boilerplate Runtime for Apache Flink. Fail fast, serialize natively, and ship bulletproof streaming applications to production.

    Java

  2. cyclistic-data-analysis cyclistic-data-analysis Public

    Cyclistic bike-share data analysis using SQL, Google Sheets, R, and Tableau to identify behavioral differences between casual riders and annual members.

    R 1

  3. FoodCalorie_BackEnd FoodCalorie_BackEnd Public

    FastAPI backend for food image recognition and nutrition analysis using TensorFlow Lite.

    Python

  4. CodeMonk CodeMonk Public

    Forked from YeamimHossainSajid/CodeMonk

    CodeMonk 🥋 —>An open-source AI powered code intelligence platform that helps developers understand, explore, and navigate complex codebases using modern Spring Boot, Spring AI, RAG, knowledge graph...

    Python 2

  5. camel-catalog camel-catalog Public

    Forked from KaotoIO/camel-catalog

    Personal fork of KaotoIO/camel-catalog for contributing fixes and improvements.

    Java 1

  6. SwitchOnTracker SwitchOnTracker Public

    A Flutter-based offline-first habit tracking application with local storage, clean architecture, and personalized tracking features.

    Dart

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