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IQ-DEV-LAB

Backend Deep Dive

Java·Spring·DB·Infra의 내부를 파헤치는 38개 레포

↗ site ↗ github

Java Core

언어와 JVM 내부 — 객체지향부터 가상 스레드까지

7 repos

오브젝트 object

객체지향 설계의 역할·책임·협력 원칙

Modern Java in Action modern-java-in-action

람다·스트림·CompletableFuture 함수형 프로그래밍

Java API Reference java-api-reference

표준 라이브러리 원리와 실무 패턴

Java Design Patterns java-design-patterns

GoF·아키텍처·동시성 패턴 47가지 Before/After

Unit Testing unit-testing

단위 테스트 설계 원칙과 Mocking 전략

Java Concurrency Deep Dive java-concurrency-deep-dive

JVM 락 메커니즘·CAS·AQS·가상 스레드

JVM Deep Dive jvm-deep-dive

클래스 로딩·GC·JIT·메모리 모델 완전 해부

Spring Ecosystem

백엔드의 핵심 프레임워크 완전 해부

8 repos

Spring Core Deep Dive spring-core-deep-dive

IoC·DI·Bean 생명주기·AOP Proxy

Spring Data & Transaction spring-data-transaction

JPA 내부 구조·트랜잭션·Hibernate

Spring Boot Internals spring-boot-internals

Auto-configuration·Actuator·Property

Spring MVC Deep Dive spring-mvc-deep-dive

DispatcherServlet·HandlerMapping·Async

Spring Security Deep Dive spring-security-deep-dive

FilterChainProxy·JWT·OAuth2 Flow

Spring Batch Deep Dive spring-batch-deep-dive

ChunkOrientedTasklet·Partitioning

Spring Cloud Deep Dive spring-cloud-deep-dive

Config·Eureka·Gateway·Circuit Breaker

Spring WebFlux Deep Dive spring-webflux-deep-dive

Reactive Streams·Reactor·Netty·R2DBC

Architecture & Design

도메인 설계부터 분산 아키텍처까지

5 repos

Architecture Patterns architecture-patterns-deep-dive

Layered→Hexagonal→Clean, Uncle Bob 4원칙

DDD Deep Dive ddd-deep-dive

Bounded Context·Aggregate·Domain Event

CQRS + Event Sourcing cqrs-event-sourcing-deep-dive

CQS·Event Store·Projection 원리

MSA Deep Dive msa-deep-dive

Saga 분산 트랜잭션·서비스 경계·Circuit Breaker

System Design Deep Dive system-design-deep-dive

대규모 시스템 설계 원칙·케이스 스터디

Infrastructure & DevOps

코드가 운반되고 실행되는 모든 것

7 repos

Linux for Backend linux-for-backend-deep-dive

커널 I/O·메모리·스케줄러·epoll

Network Deep Dive network-deep-dive

TCP·TLS 1.3·HTTP/2 멀티플렉싱

Git In-Depth git-in-depth

Object Model·Rebase 심화·트러블슈팅

Docker Deep Dive docker-deep-dive

Namespaces·Cgroups·UnionFS·네트워킹

Kubernetes Deep Dive kubernetes-deep-dive

Control Plane·etcd·Scheduler·HPA

CI/CD Pipeline cicd-deep-dive

GitHub Actions·Docker 캐시·ArgoCD·카나리

Observability observability-deep-dive

Java Agent·Prometheus·OpenTelemetry

Database

데이터가 저장되고 조회되는 엔진 내부

6 repos

Database Internals database-internals

Buffer Pool·B-Tree·MVCC·Gap Lock

MySQL Deep Dive mysql-deep-dive

실행계획·Binary Log·Replication Lag

PostgreSQL Deep Dive postgresql-deep-dive

MVCC·VACUUM·SSI·Index-Only Scan

Redis Deep Dive redis-deep-dive

자료구조·RDB/AOF·클러스터·Stream

Elasticsearch Deep Dive elasticsearch-deep-dive

Lucene 역색인·BM25·Shard 분산

DB Migration db-migration-deep-dive

Flyway·Online DDL·Expand-Contract 무중단

Messaging & Streaming

비동기 통신과 이벤트 스트리밍

2 repos

Kafka Deep Dive kafka-deep-dive

파티션·ISR·acks·Exactly-Once 구현

RabbitMQ Deep Dive rabbitmq-deep-dive

Exchange 라우팅·Quorum Queue·Outbox

API & Communication

서비스 간 통신 프로토콜의 내부

1 repos

gRPC + Protocol Buffers grpc-deep-dive

Protobuf TLV·HTTP/2 스트림·Deadline 전파

Security Engineering

공격의 근본 원인과 방어 설계

1 repos

Security Engineering security-engineering-deep-dive

STRIDE·SQLi/XSS/CSRF·JWT 공격·SSRF·OWASP

Performance & Quality

시스템을 더 빠르고 투명하게

1 repos

Performance Testing performance-testing-deep-dive

k6 부하·p95/p99·Flame Graph·GC STW

IQ-AI-LAB

AI Foundations

수학에서 Frontier LLM까지 — 11개 레이어 48개 레포

↗ site ↗ github

Mathematics

모든 AI 수식의 출발점 — 미분·확률·정보의 언어

10 repos

Linear Algebra linear-algebra-deep-dive

벡터공간·고유값·SVD·PCA 증명·텐서

Probability Theory probability-theory-deep-dive

측도 기반 확률론·마팅게일·수렴 4종

Mathematical Statistics mathematical-statistics-deep-dive

MLE/MAP 유도·가설검정·점근이론

Calculus & Optimization calculus-optimization-deep-dive

편미분·야코비안·헤시안·라그랑주

Convex Optimization convex-optimization-deep-dive

볼록 집합/함수·KKT 조건·쌍대이론

Information Theory information-theory-deep-dive

Shannon Entropy·KL-Divergence·상호정보량

Stochastic Processes stochastic-processes-deep-dive

마르코프 체인·브라운 운동·MCMC

Stochastic Differential Equations sde-deep-dive

이토 적분·SDE·Fokker-Planck 방정식

Functional Analysis functional-analysis-deep-dive

힐베르트 공간·스펙트럴 이론·RKHS

Information Geometry information-geometry-deep-dive

통계다양체·Fisher 정보·Natural Gradient

ML Theory

고전 ML의 수학적 토대 — 왜 일반화되는가

5 repos

ML Fundamentals ml-fundamentals-deep-dive

선형회귀 Normal Eq·SVM·앙상블 수렴

Statistical Learning Theory statistical-learning-theory-deep-dive

PAC 학습·VC 차원·Rademacher 복잡도

Kernel Methods kernel-methods-deep-dive

커널 트릭·Mercer 정리·RKHS

Bayesian ML bayesian-ml-deep-dive

Variational Inference·MCMC·GP

Graphical Models graphical-models-deep-dive

Bayesian/Markov Network·Inference

Neural Network Theory

신경망이 왜 작동하는가 — 이론적 기반

4 repos

Neural Network Theory neural-network-theory-deep-dive

역전파·보편 근사 정리·표현력

Optimization Theory optimization-theory-deep-dive

SGD 수렴·Adam·Second-order 방법

Generalization Theory generalization-theory-deep-dive

Double Descent·NTK·Lottery Ticket

Regularization Theory regularization-theory-deep-dive

Dropout·BatchNorm·Weight Decay 이론

Architectures

현대 AI의 벽돌들 — 아키텍처 해부

5 repos

CNN Deep Dive cnn-deep-dive

Convolution·Pooling·ResNet·EfficientNet

RNN & LSTM rnn-lstm-deep-dive

시퀀스 모델링·Vanishing Gradient·Gate 메커니즘

Transformer Deep Dive transformer-deep-dive

Self-Attention·Multi-Head·Positional Encoding

Graph Neural Network gnn-deep-dive

Message Passing·GCN·GAT·GraphSAGE

Generative Model generative-model-deep-dive

VAE·GAN·Flow·Score-based

L4-A

Reinforcement Learning

의사결정의 수학 — MDP부터 PPO까지

6 repos

RL Foundations rl-foundations-deep-dive

MDP·Bellman Equation·DP·Monte Carlo

Model-Free RL model-free-rl-deep-dive

Q-Learning·SARSA·TD Learning

Deep RL deep-rl-deep-dive

DQN·Double/Dueling·Rainbow

Policy Gradient policy-gradient-deep-dive

REINFORCE·Actor-Critic·PPO·GRPO

Advanced RL advanced-rl-deep-dive

Model-based·Offline RL·Meta-RL

RL Theory rl-theory-deep-dive

수렴 증명·Sample Complexity·Regret

L4-B

Large Language Models

LLM의 학습과 추론 — Scaling과 Alignment

4 repos

LLM Pretraining llm-pretraining-deep-dive

Scaling Law·Chinchilla·Data Curation

LLM Alignment llm-alignment-deep-dive

RLHF·DPO·Constitutional AI

LLM Efficiency llm-efficiency-deep-dive

LoRA·QLoRA·Quantization·Distillation

LLM Inference llm-inference-deep-dive

KV Cache·Speculative Decoding·vLLM

L4-C

Computer Vision & 3D

이미지·3D의 수학적 구조

4 repos

Vision Transformer vision-transformer-deep-dive

ViT·DINO·MAE·CLIP

Object Detection object-detection-deep-dive

R-CNN·YOLO·DETR·Segment Anything

Diffusion Model diffusion-model-deep-dive

DDPM·Score Matching·Stable Diffusion

3D & Neural Rendering 3d-neural-rendering-deep-dive

NeRF·Gaussian Splatting·SDF

L4-D

NLP

언어 처리의 전통적 기반

2 repos

NLP Foundations nlp-foundations-deep-dive

Tokenization·Word Embedding·Parsing

Pretrained LM pretrained-lm-deep-dive

BERT·GPT·T5 아키텍처와 학습

L4-E

Audio & Speech

음성·오디오 신호의 딥러닝

1 repos

Audio & Speech audio-speech-deep-dive

Whisper·wav2vec·Spectrogram·TTS

Systems

수학을 실제 시스템으로 — 학습 엔진과 배포

4 repos

PyTorch Internals pytorch-internals-deep-dive

Autograd·Dispatcher·Tensor 메모리

Distributed Training distributed-training-deep-dive

DDP·FSDP·Pipeline/Tensor Parallel

Efficient ML efficient-ml-deep-dive

Pruning·Quantization·Flash Attention

Experimental Statistics & MLOps experimental-statistics-mlops-deep-dive

A/B Test·실험 설계·Model Registry·Serving

Frontier LLM

현재 진행형 연구 — 해석·추론·검색

3 repos

Mechanistic Interpretability mechanistic-interpretability-deep-dive

Sparse Autoencoder·Circuit 분석

LLM Reasoning llm-reasoning-deep-dive

CoT·Tree of Thoughts·Self-Consistency·추론 체인

Retrieval & RAG retrieval-rag-deep-dive

Dense Retrieval·RAG·Multi-Vector

총 86개 레포 · 지속적으로 업데이트

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