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JavaGuide

Backend tech guide and AI engineering practice covering fundamentals, databases, distributed systems, high concurrency, system design, plus AI agents and large-model engineering.

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Latest from JavaGuide

46 recent articles
JavaGuide
JavaGuide
Nov 8, 2025 · Interview Experience

Meituan vs ByteDance Douyin: How to Choose the Right Offer

A recent graduate compares offers from Meituan's Beijing marketing platform and ByteDance's Shanghai Douyin e‑commerce team, weighing base location, title prestige, salary, work pressure, team atmosphere, and career growth across transaction, product, instant delivery, and national subsidy domains.

ByteDanceDouyinMeituan
0 likes · 5 min read
Meituan vs ByteDance Douyin: How to Choose the Right Offer
JavaGuide
JavaGuide
Nov 6, 2025 · Fundamentals

Why Transsion’s Java Jobs Offer 30‑40k Salaries and How to Ace Their Easy Interview

Transsion’s Java positions in Shanghai and Shenzhen pay 300k‑400k RMB, the interview is surprisingly simple, and the article walks through Java’s compilation pipeline, JVM benefits, Java‑C++ differences, exception handling, collections, concurrency, multithreading, project‑prep tips, and essential AI concepts for interviewers.

CollectionsConcurrencyJVM
0 likes · 14 min read
Why Transsion’s Java Jobs Offer 30‑40k Salaries and How to Ace Their Easy Interview
JavaGuide
JavaGuide
Nov 5, 2025 · Artificial Intelligence

Cursor Goes Beyond the IDE with Agent Mode and Its Own Composer LLM

Cursor, once hailed as the leading AI‑enhanced IDE, has shifted its focus by making Agent mode the default and launching its own large‑model Composer, which the vendor claims runs four times faster than comparable models, though real‑world performance remains to be validated.

AI IDEAgentClaude
0 likes · 4 min read
Cursor Goes Beyond the IDE with Agent Mode and Its Own Composer LLM
JavaGuide
JavaGuide
Nov 4, 2025 · Backend Development

JD Backend Salary Ranges 2024 & How to Ace the Interview

The article shares recent JD backend salary data ranging from 24k to 32k RMB per month, explains the compensation structure, and provides a step‑by‑step interview preparation guide covering project presentation, JWT, Redis, thread pools, MySQL‑Elasticsearch sync, isolation levels and performance analysis.

Backend DevelopmentInterview PreparationJD
0 likes · 21 min read
JD Backend Salary Ranges 2024 & How to Ace the Interview
JavaGuide
JavaGuide
Oct 30, 2025 · Backend Development

Why Spring Boot 4.0 Dropped Support for Undertow

Spring Boot 4.0 removes Undertow because it cannot meet the Servlet 6.1 baseline, leading to build failures for projects that depend on spring-boot-starter-undertow, and the article analyzes the technical reasons, compatibility matrix, and lessons for future web‑container selection.

backend-migrationjakarta-eeservlet-6.1
0 likes · 10 min read
Why Spring Boot 4.0 Dropped Support for Undertow
JavaGuide
JavaGuide
Oct 27, 2025 · Backend Development

OPPO 2026 Campus Hiring: Salary Insights and In‑Depth Java Exception & Concurrency Guide

The article reviews OPPO’s 2026 campus hiring salaries for backend and algorithm roles, outlines the interview stages, and provides a comprehensive Java guide covering exceptions, checked vs unchecked, reference types, HashMap concurrency issues, ConcurrentHashMap internals, and the differences between synchronized and volatile.

Backend DevelopmentCampus RecruitmentConcurrency
0 likes · 17 min read
OPPO 2026 Campus Hiring: Salary Insights and In‑Depth Java Exception & Concurrency Guide
JavaGuide
JavaGuide
Oct 25, 2025 · Interview Experience

Microstrategy: A 9‑5‑Friendly Foreign Tech Company with Strong Java Interview Process

The article introduces Microstrategy, a US‑based BI firm with a large Hangzhou R&D center, outlines its generous 9‑5‑style work environment, details the interview stages—including written test, technical and non‑technical rounds—and provides concrete advice on self‑introduction, project presentation, system design, Canal‑MySQL sync, XXL‑Job video transcoding, Redis, MongoDB, SQL injection, Java exceptions, OOP concepts, and interview puzzles.

Backend DevelopmentCanalJava interview
0 likes · 18 min read
Microstrategy: A 9‑5‑Friendly Foreign Tech Company with Strong Java Interview Process
JavaGuide
JavaGuide
Oct 24, 2025 · Backend Development

Introducing AipexBase: China’s First Open‑Source AI‑Native Backend Platform

AipexBase, the first Chinese open‑source AI‑native backend‑as‑a‑service platform, lets developers and AI agents bypass traditional server, database, and authentication code by using an MCP‑compatible SDK, with step‑by‑step deployment, API key generation, and integration examples that demonstrate end‑to‑end intelligent app creation.

AI BackendAI codingBaaS
0 likes · 7 min read
Introducing AipexBase: China’s First Open‑Source AI‑Native Backend Platform
JavaGuide
JavaGuide
Oct 21, 2025 · Backend Development

Xiaohongshu’s Explosive Salaries and a Complete Backend Interview Guide

The article reveals Xiaohongshu’s unusually high 2023 campus recruitment packages—over 51 w annual total—while also providing an extensive backend interview preparation guide covering TCP vs UDP differences, design patterns, workflow versus rule engines, message‑queue selection, and Redis data structures and eviction policies.

Backend DevelopmentDesign PatternsInterview Preparation
0 likes · 32 min read
Xiaohongshu’s Explosive Salaries and a Complete Backend Interview Guide
JavaGuide
JavaGuide
Oct 19, 2025 · Backend Development

Java Backend Guide: @Autowired vs @Resource, MySQL Engines, Redis, JVM OOM

The article shares ZTE salary offers and interview tips, then dives into technical deep‑dives on Spring bean injection annotations, compares MySQL InnoDB and MyISAM, explains Redis usage patterns, and walks through JVM OutOfMemoryError diagnosis with concrete code and tooling examples.

BackendJVMJava
0 likes · 21 min read
Java Backend Guide: @Autowired vs @Resource, MySQL Engines, Redis, JVM OOM