Devanshu Biswas - DEV Community

Devanshu Biswas

Jul 1

Caching That Survives Real Traffic: TTL Jitter and Single-Flight in Spring Boot

#springboot #java #redis #backend

2 min read

Devanshu Biswas

Jul 1

Why Your LLM Doesn't Re-Read the Prompt: The KV-Cache

#ai #llm #machinelearning #beginners

1

2 min read

Devanshu Biswas

Jul 1

One "+x" That Made 100-Layer Networks Trainable: ResNet Skip Connections

#machinelearning #deeplearning #ai #beginners

2 min read

Devanshu Biswas

Jul 1

Gaussian Mixture Models: Soft Clustering with the EM Algorithm

#machinelearning #ai #datascience #beginners

2 min read

Devanshu Biswas

Jul 1

The Unix Timestamp, Demystified (and the 1000 Bug That Bites Everyone)

#javascript #webdev #beginners #programming

2 min read

Devanshu Biswas

Jul 1

Skeleton of Thought: Make an LLM Answer 2–3 Faster

#ai #llm #promptengineering #beginners

2 min read

Devanshu Biswas

Jul 1

The Tooltip Problem: A Little Box That Never Falls Off Screen

#javascript #webdev #css #beginners

2 min read

Devanshu Biswas

Jul 1

I Built a Tic-Tac-Toe AI That Literally Cannot Lose

#javascript #gamedev #beginners #algorithms

2 min read

Devanshu Biswas

Jul 1

Same request. Same answer. One is ~120ms, the other is ~2ms. The only difference is whether it came from Postgres or from Redis.

#springboot #java #redis #backend

1

5 min read

Devanshu Biswas

Jul 1

How to Make an LLM 2-3x Faster Without Changing a Single Word It Says

#ai #llm #machinelearning #beginners

1

4 min read

Devanshu Biswas

Jul 1

Your gradient dies on the way to layer 1 (and how to save it)

#machinelearning #deeplearning #ai #beginners

1

4 min read

Devanshu Biswas

Jul 1

AdaBoost from Scratch: How a Pile of Dumb Rules Becomes a Smart Classifier

#machinelearning #ai #javascript #beginners

2

5 min read

Devanshu Biswas

Jul 1

I finally understood cron expressions by building an explainer for them

#javascript #webdev #beginners #devops

2

1

5 min read

Devanshu Biswas

Jul 1

Graph of Thoughts: when a tree of reasoning isn't enough, let the branches merge

#ai #llm #promptengineering #beginners

4 min read

Devanshu Biswas

Jul 1

How I Render 100,000 Rows With Only ~20 DOM Nodes

#javascript #webdev #performance #beginners

4 min read

Devanshu Biswas

Jul 1

Four Rules, Infinite Worlds: Building Conway's Game of Life from Scratch

#javascript #gamedev #beginners #webdev

5 min read

Devanshu Biswas

Jul 1

useState vs useReducer vs Zustand: I Built the Same Feature Three Ways (With Live Render Counts)

#react #javascript #webdev #beginners

2 min read

Devanshu Biswas

Jul 1

I Built a @Transactional Visualizer for Spring (Propagation + Isolation)

#spring #java #database #backend

2 min read

Devanshu Biswas

Jun 30

isLoading vs isFetching: I Built an Interactive Model of the React Query State Machine

#react #javascript #webdev #beginners

2

2 min read

Devanshu Biswas

Jun 30

I Built a Cron Visualizer for Spring @Scheduled (6 Fields, Not 5)

#spring #java #backend #webdev

2 min read

Devanshu Biswas

Jun 30

OrderHub Day 10: Self-Documenting API (Swagger) + a Production Docker Image

#java #spring #docker #beginners

1 min read

Devanshu Biswas

Jun 30

Quantization: How 70B Models Run on a Gaming GPU

#ai #llm #machinelearning #beginners

1 min read

Devanshu Biswas

Jun 30

Dropout: Switch Off Neurons to Stop Overfitting

#machinelearning #deeplearning #ai #beginners

1 min read

Devanshu Biswas

Jun 30

ROC & AUC: Why Accuracy Lies (and What to Use Instead)

#machinelearning #ai #datascience #beginners

1 min read

Devanshu Biswas

Jun 30

A JWT Decoder in the Browser — and Why the Payload Isn't Secret

#javascript #webdev #security #beginners

1 min read

Devanshu Biswas

Jun 30

Reflexion: Make an AI Agent Learn From Its Own Mistakes

#ai #llm #promptengineering #beginners

1 min read

Devanshu Biswas

Jun 30

A Modal Dialog Done Right: Focus Trap, Esc, Scroll Lock

#javascript #css #a11y #beginners

1 min read

Devanshu Biswas

Jun 30

I Built Sudoku — Backtracking Solves AND Generates It

#javascript #gamedev #webdev #beginners

1 min read

Devanshu Biswas

Jun 28

OrderHub Day 9: Integration Tests on Real Postgres With Testcontainers

#java #spring #testing #beginners

1

1 min read

Devanshu Biswas

Jun 28

Mixture of Experts: Big Models, Cheap Inference

#ai #llm #machinelearning #beginners

2 min read

Devanshu Biswas

Jun 28

Batch Normalization: Why It Made Deep Nets Trainable

#machinelearning #deeplearning #ai #beginners

1 min read

Devanshu Biswas

Jun 28

The Bias-Variance Tradeoff, Finally Visualized

#machinelearning #ai #datascience #beginners

1 min read

Devanshu Biswas

Jun 28

Generate SHA Hashes in the Browser With the Web Crypto API

#javascript #webdev #security #beginners

1 min read

Devanshu Biswas

Jun 28

Self-Ask Prompting: Let the Model Interview Itself

#ai #llm #promptengineering #beginners

1 min read

Devanshu Biswas

Jun 28

A Date Picker From Scratch — the Whole Calendar Is Two Lines

#javascript #css #webdev #beginners

1

1 min read

Devanshu Biswas

Jun 28

I Built the 15-Puzzle — and Why Half of All Shuffles Are Impossible

#javascript #gamedev #webdev #beginners

1 min read

Devanshu Biswas

Jun 28

Context vs Prop Drilling: I Put the Re-render Blast Radius Side by Side

#react #javascript #webdev #beginners

2 min read

Devanshu Biswas

Jun 28

I Built a Searchable HTTP Status Reference With the Exact Spring Way to Return Each

#spring #java #webdev #backend

2 min read

Devanshu Biswas

Jun 27

OrderHub Day 8: Testing With JUnit 5, Mockito & MockMvc (Spring Boot)

#java #spring #testing #beginners

1

1 min read

Devanshu Biswas

Jun 27

Prompt Injection: How It Works and How to Defend

#ai #llm #security #beginners

1

1 min read

Devanshu Biswas

Jun 27

Q-Learning From Scratch: Reinforcement Learning in a Gridworld

#machinelearning #ai #reinforcementlearning #beginners

1 min read

Devanshu Biswas

Jun 27

Cross-Validation: Why One Train/Test Split Lies

#machinelearning #ai #datascience #beginners

1 min read

Devanshu Biswas

Jun 27

The WCAG Contrast Ratio, Explained (With a Live Checker)

#javascript #css #a11y #beginners

1

1 min read

Devanshu Biswas

Jun 27

Least-to-Most Prompting: Decompose, Then Solve in Order

#ai #llm #promptengineering #beginners

1 min read

Devanshu Biswas

Jun 27

I Built a Carousel With Zero Libraries (Swipe + Autoplay)

#javascript #css #webdev #beginners

1

1 min read

Devanshu Biswas

Jun 27

I Built Wordle in Vanilla JS — the Duplicate-Letter Trap

#javascript #gamedev #webdev #beginners

1

1 min read

Devanshu Biswas

Jun 27

useMemo vs useCallback: I Built a Tool That Makes Referential Equality Visible

#react #javascript #webdev #beginners

3

2 min read

Devanshu Biswas

Jun 27

I Built a Visualizer for the Spring Bean Lifecycle (Context Startup, @PostConstruct, Prototype Beans)

#spring #java #backend #webdev

2 min read

Devanshu Biswas

Jun 26

I Built a Live Timeline of React Hooks (useState, useEffect, useMemo, useRef)

#react #javascript #webdev #beginners

2

2 min read

Devanshu Biswas

Jun 26

I Built an Interactive Kafka Playground (Partitions, Keys, Consumer Groups, Offsets)

#kafka #java #backend #webdev

1

2 min read

Devanshu Biswas

Jun 26

OrderHub Day 7: Config & Profiles With @ConfigurationProperties (Spring Boot)

#java #spring #webdev #beginners

1

1 min read

Devanshu Biswas

Jun 26

How LLMs Are Trained: Pretraining, SFT, and RLHF

#ai #llm #machinelearning #beginners

1 min read

Devanshu Biswas

Jun 26

Transfer Learning: Stand on a Pretrained Model

#machinelearning #deeplearning #ai #beginners

1 min read

Devanshu Biswas

Jun 26

Regularization From Scratch: L1 vs L2, Visualized

#machinelearning #ai #datascience #beginners

1 min read

Devanshu Biswas

Jun 26

Why split(',') Breaks CSV — and a Parser That Doesn't

#javascript #webdev #json #beginners

1 min read

Devanshu Biswas

Jun 26

Step-Back Prompting: Ask the Bigger Question First

#ai #llm #promptengineering #beginners

1 min read

Devanshu Biswas

Jun 26

I Rebuilt Instagram Stories' Segmented Progress Bars

#javascript #css #webdev #beginners

1

1 min read

Devanshu Biswas

Jun 26

I Built Memory Match in Vanilla JS (With a CSS 3D Flip)

#javascript #gamedev #webdev #beginners

1 min read

Devanshu Biswas

Jun 25

I Built a Tool That Shows You Exactly Why a React Component Re-renders

#react #javascript #webdev #beginners

1

2 min read

Devanshu Biswas

Jun 25

I Built a Tool That Shows the SQL Behind Any Spring Data Method Name

#spring #java #sql #webdev

2 min read

Writing Debut