youngjunyoo.com
Experience

Industry Experience

LinkedIn LinkedIn

Software Engineer Intern | Systems Infrastructure
Summer 2026 · Mountain View, CA

N/A
  • Incoming Summer 2026

FoodFluence AI FoodFluence AI

Software Engineer Intern | Full Stack
Fall 2025 · Austin, TX · Recommendation

TypeScript · React · Express · Python · Flask · Firebase · Docker · Google Cloud Platform
  • Architected a cross-platform sign-up workflow for TikTok-only influencers, restructuring 70+ core modules across 5 repositories to resolve cross-service bottlenecks and unlock a projected $500k+ in revenue from 8k+ new creators.
  • Developed a reverse geocoding pipeline for 36k+ influencer profiles with 99% accuracy, implementing a multi-level caching layer to reduce API overhead by 60% and enabling high-performance, multi-criteria zip code filtering.
  • Prevented 95% of erroneous invitations for 3.5k+ partners via duplicate detection, saving 10+ hours of weekly cleanup.
  • Deprecated 12,000 lines of legacy code via shared libraries across 5+ repositories, boosting maintainability by 55%.

Samsung SDS Samsung SDS

Software Engineer Intern | AI Agents
Summer 2025 · Seoul, South Korea · Recommendation

Python · FastAPI · Amazon OpenSearch
  • Engineered a memory-augmented AI agent for on-device applications, enabling dynamic, context-aware behavior generation; improved task completion accuracy by 38% through advanced retrieval from a vectorized memory store.
  • Architected a scalable core memory system with short-term buffers and long-term semantic stores via OpenSearch.
  • Optimized memory consolidation through adaptive few-shot prompting, enhancing agent learning efficiency by 20%.

TwinSketch TwinSketch

Software Engineer Intern | Platform Infrastructure
Summer 2025 · San Francisco, CA

TypeScript · Amazon DynamoDB · Amazon S3 · Zod
  • Architected a robust role-based access control system with granular permissions and strict API validation using Zod schemas, mitigating unauthorized access risks by 65% and enabling auditable access control for enterprise clients.
  • Engineered automated DynamoDB backups with PITR and AWS Backup integration, ensuring 99.9% data durability.
  • Built robust testing infrastructure with Jest, achieving 90%+ coverage and 70% fewer bugs with automated validation.

Fasoo Inc. Fasoo Inc.

Software Engineer Intern | Conversational AI
Summer 2024 · Seoul, South Korea

Amazon EC2 · FastAPI · OpenAI Audio API · WhisperX · Faster-Whisper · LiteLLM
  • Developed a voice-to-note solution for 3k+ daily users using VAD optimization and multi-threaded processing, achieving 96% transcription accuracy and optimizing end-to-end latency by 40% through a low-latency backend.
  • Implemented a TTS platform for bi-directional, real-time voice communication, increasing user engagement by 65%.

Software Engineer Intern | Internal Tools
Summer 2023 · Seoul, South Korea

TypeScript · React · Node · Redux Toolkit
  • Shipped a reusable React component library to overhaul the company’s internal project management system, consolidating over 5,000 lines of redundant code and reducing frontend bugs in related features by 20%.
  • Developed a real-time markdown renderer with live preview, boosting productivity by 40% for 300+ employees.

Software Engineer Intern | Application Security
Summer 2021 · Seoul, South Korea

Flask · Python · SQLite · SAST · Security Testing · OWASP Top 10
  • Created a deliberately insecure Flask application to test Sparrow, a static/dynamic application security testing solution.
  • Augmented Sparrow’s static application security testing (SAST) suite with new ground truths, mitigating 90% of obfuscated OWASP Top 10 security risks in Flask WebGoat, surpassing the detection capabilities of external tools.

Campus Leadership

Hack the Future Purdue Hack the Future

Internal Outreach Lead
Fall 2025 — Present

  • Having fun :)

Team Lead
Fall 2024 — spring 2025

  • Leading a 10-person team in developing and deploying a revamped website for Rebuilding Together East Bay Network (RTEBN), ensuring stakeholder alignment.
  • Organized weekly meetings, served as the primary communication point with stakeholders, and utilized Agile methodology for project management.
  • Acted as Scrum Master, facilitating team collaboration and mentoring in React, Git version control, and design principles for effective project delivery.

Frontend Developer
Fall 2023 — Spring 2024

  • Developed a robust billing website for YWCA Greater Lafayette using React and Material UI, enhancing both user experience and operational efficiency.
  • Created a CSV file previewer that seamlessly integrates with the new billing frontend, offering efficient parsing and instant display of data in a well-organized table, tailored for non-profit billing management.
  • Automated the generation of personalized vendor bills from CSV uploads, facilitating direct PDF downloads and achieving a 65% reduction in bill processing time.

Backend Developer
Fall 2020 — Spring 2021

  • Worked in a team to develop large-scale software for NICHES Land Trust, an organization focused on conserving natural habitats in west-central Indiana.
  • Developed a full-stack web application that tracks items needing removal in parks, integrating geolocation to help volunteers navigate trails with interactive landmarks and waypoints.

Academic Mentorship

Prof. Hisham R. Benotman Information Systems

Spring 2025
CS 34800

  • Facilitated weekly office hours to assist students in debugging and optimizing complex SQL queries using SQLite, reinforcing core concepts of relational algebra and functional dependencies.
  • Supported student learning in non-relational database architectures, providing technical guidance on document-based modeling with MongoDB and graph database implementations using Neo4j.
  • Evaluated final projects for 50+ students, assessing web-based applications based on database design documentation, indexing strategies, Prepared Statements, ORMs, and transaction isolation levels.

Prof. Gustavo Adolfo Junipero Rodriguez-rivera Systems Programming

Fall 2024, Spring 2026 (Head TA)
CS 25200

  • Conducted weekly lab sessions, assisting 300+ students in systems programming concepts and supporting malloc implementation, shell scripting, shell implementation, thread programming, and web server projects in C/C++.
  • Selected as Head TA (Spring 2026) to lead lab sessions, delivering comprehensive project introductions and live technical demonstrations including x86-64 assembly programming and debugging with GDB/GEF.
  • Conducted in-lab project evaluations, interviewing students to verify comprehension of their unique implementations while ensuring strict memory safety using Valgrind.

Prof. Jeffrey A. Turkstra Programming in C

Spring 2024, Spring 2025, Spring 2026
CS 24000

  • Guided 300+ students on core C concepts (memory management, pointers, structs) through a course Q&A forum.
  • Participated in QA for assignments for 700+ students, graded assignments, and led weekly labs with 30+ students.
  • Evaluated code standards, specifically focusing on variable definitions, initialization, and scope detection to ensure adherence to quality standards.

Prof. H. E. Dunsmore Object-Oriented Programming

Fall 2025
CS 18000

  • Mentored 600+ students on foundational Object-Oriented Programming principles, including polymorphism, inheritance, encapsulation, and interface implementation in Java.
  • Facilitated weekly lab sessions to assist 40+ students per section with complex assignments involving multi-threaded concurrency, synchronization, network I/O, and GUI development using event listeners.
  • Resolved 100+ technical inquiries on Ed Discussion, debugging student code snippets and clarifying complex concepts such as concurrency constraints, recursion, and interface polymorphism.