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open hearts, open code
🌿
open hearts, open code
4 followers · 27 following

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Achievement: Pull Sharkx2

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Achievement: Pull Sharkx2

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timothytkim/README.md

Timothy Kim

Backend Software Engineer · Open Source Contributor

LinkedIn

Backend engineer focused on Java/Spring Boot, Python/FastAPI, APIs, testing, observability, and data systems. My experience includes Java backend development at Infosys, software validation and defect investigation at Samsung Electronics America, and open-source contributions across indexing, observability, caching, data tooling, and Java libraries.

Tech Stack

Java · Python · SQL — Spring Boot · FastAPI · REST APIs · JUnit · Mockito · AssertJ · Maven · Git · Linux · Docker · AWS

Current Focus

  • Database Systems — PostgreSQL, indexing, transactions, replication, and change data capture
  • Kubernetes — operators, CRDs, stateful workloads, storage, and cloud-native infrastructure
  • Distributed Systems — observability, reliability, performance diagnostics, and data infrastructure

Open Source

  • Spector — Contributing HNSW index diagnostics, Prometheus/Grafana observability, structured logging, regression coverage, and Java API documentation.
  • Flinkboot — Improved Apache Flink/Kafka-related validation, YAML error handling, and type assertion APIs with regression tests.
  • CodeMonk — Added Redis caching functionality and edge-case test coverage for cache keys, TTL behavior, and eviction.
  • Kaoto / camel-catalog — Improved Java runtime compatibility, stable identifiers, packaged-resource handling, and regression coverage.
  • NKAP #79 — Improved MTN simulator error payloads and configurability while preserving compatibility and adding regression coverage.

Selected Projects

  • FoodCalorie Backend — FastAPI backend for food-image recognition and nutrition analysis using Python, TensorFlow Lite, and external APIs.
  • Cyclistic Data Analysis — End-to-end SQL, R, and Tableau analysis of behavioral data and usage patterns.
  • SwitchOnTracker — Offline-first Flutter app for structured local data and daily progress tracking.

Experience

  • Infosys — Tech Associate: Java backend development, SQL, testing, performance investigation, and Agile delivery for Lumen Technologies.
  • Samsung Electronics America — Network QA Engineer I: Post-release software validation, KPI analysis, defect reproduction, and root-cause investigation support using Linux-based workflows with development teams.

Pinned Loading

  1. FoodCalorie_BackEnd FoodCalorie_BackEnd Public

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

    Python

  2. spector spector Public

    Forked from spectrayan/spector

    Cognitive memory backbone for AI agents. Biologically-inspired 4-tier memory, it remembers, forgets, consolidates, and forms associations across a memory graph — Hebbian co-activation, temporal cha…

    Java

  3. nkap nkap Public

    Forked from Deval123/nkap

    An open mobile money gateway with a real double-enty ledger. A timeout is not a failure.

    Java

  4. camel-catalog camel-catalog Public

    Forked from KaotoIO/camel-catalog

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

    Java 1

  5. nv-i18n nv-i18n Public

    Forked from foundationsedge/nv-i18n

    Package to support internationalization, containing ISO 3166-1 country code enum, ISO 639-1 language code enum, etc.

    Java 1

  6. 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