Everything you need to know to get the job.

Google core libraries for Java

A browser automation framework and ecosystem.

Mirror of Apache Kafka

Apache Flink

GraalVM compiles Java applications into native executables that start instantly, scale fast, and use fewer compute resources 🚀

JDK main-line development https://openjdk.org/projects/jdk

Empowering Data Intelligence with Distributed SQL for Sharding, Scalability, and Security Across All Databases.

A high performance caching library for Java

The official home of the Presto distributed SQL query engine for big data

Apache Hadoop

QuestDB is a high performance, open-source, time-series database

Graphs for Everyone

Apache Druid: a high performance real-time analytics database.

Apache Doris is an easy-to-use, high performance and unified analytics database.

Style and Grammar Checker for 25+ Languages

Apache ZooKeeper

The Java gRPC implementation. HTTP/2 based RPC

Realm is a mobile database: a replacement for SQLite & ORMs

Official repository of Trino, the distributed SQL query engine for big data, formerly known as PrestoSQL (https://trino.io)

The Clojure programming language

Distributed scheduled job

Most comprehensive list 📋 of tech interview questions 📘 of companies scraped from Geeksforgeeks, CareerCup and Glassdoor.

Apache Iceberg

Catch common Java mistakes as compile-time errors

Web-based notebook that enables data-driven, interactive data analytics and collaborative documents with SQL, Scala and more.

JSqlParser parses an SQL statement and translate it into a hierarchy of Java classes. The generated hierarchy can be navigated using the Visitor Pattern

Advanced Java Redis client for thread-safe sync, async, and reactive usage. Supports Cluster, Sentinel, Pipelining, and codecs.

Yahoo! Cloud Serving Benchmark

MapDB provides concurrent Maps, Sets and Queues backed by disk storage or off-heap-memory. It is a fast and easy to use embedded Java database engine.