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Engineering & Guides

Insights for the
Modern Engineer

Long-form deep dives, pattern breakdowns, and field notes from building Levelop.

Spotlight

System design patterns overview showing layered architectureSystem Design

3 System Design Patterns Every Engineer Should Know

ATAvinash Tyagi May 16, 2025

Trending

Editorial illustration comparing several AI code review tools side by side, shown as glowing panels above a developer's desk, each inspecting code with annotations, a magnifying glass over a diff, a security shield, and a checkmark, representing how to choose the best AI code review tool
AI Tools

Best AI Code Review Tools in 2026: CodeRabbit vs Greptile vs Qodo vs Copilot

Editorial illustration of a glowing recursive call tree made of circuit-like nodes, with small memo cards pinned to repeated branches as if the tree is remembering answers it already computed. Pinned branches glow warm gold and the repetition collapses where memos are pinned, representing memoization caching and reusing results.
Coding Patterns

Memoization: Turning Recursion Into Dynamic Programming

Editorial illustration of a developer reviewing code while an AI assistant highlights specific lines and leaves annotations, with a human approval gate giving the final sign-off before the code merges, representing AI code review with a human in the loop
AI Tools

AI Code Review: A Developer's Guide for 2026

AI Tools

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Editorial illustration of a live AI language-model app in production observed through nested tracing spans on a branching timeline, surrounded by monitoring dashboards showing latency, token cost, error rate, and a quality trend drifting over time, representing LLM observability
AI Tools

LLM Observability: Tracing and Monitoring AI Agents in Production

Editorial illustration of an autonomous AI agent following a multi-step path of tool calls while a magnifying glass and checklist inspect the whole trajectory, with dashboards showing success-rate, step-count, and tool-accuracy metrics, representing AI agent evaluation
AI Tools

AI Agent Evaluation: Metrics, Traces, and Tool-Calling Tests

System Design

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Bloom filter concept illustration showing a bit array with hash function arrows pointing to specific positions
System Design

Bloom Filters Explained: When "Probably Yes" Is Good Enough and Saves 99% of Memory

Consistent hashing ring diagram showing virtual nodes distributed across physical servers
System Design

Consistent Hashing Explained: Virtual Nodes and Why They Matter for Distributed Systems

Career

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An AI mentor guiding a software engineer up a ladder of glowing steps toward an insight
Career

What an AI Mentor Taught Me About How Engineers Learn to Code

A startup stock option on a balance scale, tipping between a pile of gold coins and nothing
Career

Startup Equity: When It's Worthless and When It's Gold

Coding Patterns

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Two Pointers pattern illustration showing two arrow cursors on a sorted array
Coding Patterns

Two Pointers: The Pattern Inside Sorted Array Problems

Dynamic programming on trees illustration showing binary tree with glowing nodes and bottom-up computation arrows
Coding Patterns

DP on Trees: When Recursion Meets Dynamic Programming

Interview Prep

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Editorial illustration of a software engineer telling a structured STAR story to a FAANG interview panel, with glowing icons for ownership, collaboration, growth, and leadership, and an interviewer marking a rubric scorecard
Interview Prep

The 20 Behavioral Interview Questions FAANG Always Asks

Editorial illustration of five ascending glowing steps representing the stages of the software engineer interview process, with a figure climbing toward an offer
Interview Prep

The Software Engineer Interview Process in 2026: Every Stage

Our Mission

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Editorial illustration of a founder's workspace behind a large glass wall, most of it transparent and open to show a desk with notebooks and a glowing laptop while one section is frosted to hide a private corner, representing building in public with deliberate limits on transparency
Our Mission

Building in Public: What I Share, What I Don't, and Why Transparency Has Limits

Thousands of scattered coding problems funneling into twelve organized coding interview pattern blocks
Our Mission

Why Levelop Teaches 12 Coding Interview Patterns Instead of 2500 Problems