Testing Like a Senior: Patterns & Anti-Patterns Across Software QA Career Levels
The QA Engineer's Field Manual
The QA field manual: the entire career arc, from your first two weeks on the job to strategic leadership, told through patterns and anti-patterns.
The fastest practical path to understanding harness-driven development as a complete system. Through clear visual diagrams and a real repository mapped to the book, you will see how a harness guides AI agents, evaluates their work, detects drift, enforces constraints, supports repair, and keeps software evolution visible, verifiable, and under control.
Graphics Pipeline Design and Hardware ImplementationModern GPUs are the most complex and efficient parallel processors ever created—and this book shows you exactly how they work at the hardware level.Unlike typical graphics or programming guides, this volume takes you inside the GPU itself: how instructions flow through pipelines, how memory hierarchies sustain bandwidth, how shader cores and fixed-function units cooperate to render billions of pixels per second.
The value of a SaaS business is more than code and revenue. Domains, service accounts, social profiles, and infrastructure ownership matter too. A competitor claiming your brand on X is bad, but a malicious npm scope using your brand to ship harmful code to customers is far worse.
The most important impact of AI on software development isn't that it writes code faster — it's that it changes what you can delegate. Agentic Programming is a practical roadmap for climbing the AI Fluency Ladder: from prompting to agentic workflows, verified execution, and ultimately autonomous software development.
A best-selling book. The practitioner's guide to Claude Code in production. Thirty-one chapters covering the agent loop, tools, hooks, MCP, the Claude Agent SDK, permissions, multi-agent orchestration, evals, observability, and cost engineering. Includes a full walkthrough of Anthropic's financial services reference agents. Code from real production systems, not toy examples.
You’ll just need the Five Essential Elements of Learning Through five essential elements, you’ll gain the ability to learn anything deeply—no matter how complex the subject. These five pillars of effective learning will become lifelong tools, guiding you every time you set out to truly master new knowledge and retain it permanently. If you're ready to stop passively consuming information and start truly mastering it, this book is for you.
Prepare for senior Go interviews, or for the jump from mid-level to senior, with a focus on AI platform engineering: LLM gateways, RAG, vector search, Kubernetes, observability, concurrency ownership, and production failure modes. Includes interview questions, senior-level answer rubrics, executable Go examples, and a production-oriented RAG service capstone you can run, test, break, and explain.
Build a complete LLM inference engine in C++ — from a blank project to a working Transformer that loads a real model and generates text. Forged one challenge at a time, with tests that prove every piece works before you move on.
How to put AI agents in production without ending up in the news. A field guide to bounded AI autonomy, MCP security, and AgentSecOps.
What makes a software engineer truly effective? Beyond writing code, effectiveness comes from ethics, sustainable practices, collaboration, and the courage to adapt. The Effective Software Engineer guides you from clean coding habits to organizational empowerment, bridging the gap between developers and leaders.
Modern networks like the Internet — explained as simply as possible — but no simpler.
Linux is one of the best decisions you can make for your computer — but knowing where to start is the hard part. This guide walks you through everything: choosing a distribution, installing it, and using it confidently every day. It was written by Jay LaCroix of Learn Linux TV, for complete beginners. No prior experience required.
Spring Boot 4 changes everything you thought you knew about building Java applications. Virtual threads make blocking code fast again. Native images deliver instant startup. First-class API versioning finally solves the "how do we evolve our APIs?" problem. But here's the catch: upgrading isn't just a dependency bump. Jakarta EE 11, new auto-configuration patterns, GraalVM constraints, and reactive vs. virtual threads— getting it right requires understanding the *why* behind every change. This book is your production-ready guide to Spring Boot 4 and Spring Framework 7. Written for intermediate developers who need more than "hello world" tutorials. Learn how to: • Build cloud-native microservices that scale • Migrate from Boot 3 safely and incrementally • Design APIs with built-in versioning and resilience • Choose between reactive, virtual threads, and native images • Secure distributed systems with JWT and OAuth2 • Implement observability that actually helps you debug production issues 300+ pages. 27 chapters. Real code. Real architecture. Real problems solved.
Skip the black-box frameworks. Build a production-grade AI coding agent from scratch in pure Python - cloud or local, tested with pytest, all in a single file.
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A complete foundation for Statistics, also serving as a foundation for Data Science. Leanpub revenue supports OpenIntro (US-based nonprofit) so we can provide free desk copies to teachers interested in using OpenIntro Statistics in the classroom and expand the project to support free textbooks in other subjects. More resources: openintro.org.
이 책은 컴포즈 컴파일러, 런타임, UI 레이어, 그리고 성능 튜닝에 이르기까지 컴포즈의 모든 것을 탐구합니다. Jetpack Compose의 내부 소스 코드를 한 줄 한 줄 읽어 내려가며 특정 설계가 왜 그렇게 결정되었는지 그 이면을 설명하고, 여러분이 매일 작성하는 코드를 내부 메커니즘과 연결해 줍니다. 이 책을 읽고 나면 컴파일러와 런타임, UI 계층의 동작 시스템이 머릿속에 완성될 것이고, 궁극적으로 여러분이 일상에서 작성하는 컴포즈 프로젝트의 성능을 크게 향상시킬 수 있습니다. 코스 (영문): Jetpack Compose Mechanisms | 하드커버 종이책 (영문) | ISBN-13: 9798185354780
A structured introduction to the foundations of civil, criminal, and business law. This book breaks down essential legal principles in a clear and accessible way, helping readers understand how the law functions in real-world situations. Designed for students and independent learners building their first strong foundation in law.
Longitudinal Data Analysis Using R is a practical, end-to-end guide to longitudinal data analysis that helps you move from raw data to credible substantive conclusions. It tackles the real pain points researchers face in longitudinal analysis, such as data preparation, exploring change over time, model choice, missing data, and interpretation, using clear explanations, real-world data, and fully reproducible R code.
Not just for mathematicians and detectives! Learn the basics of logic and its many applications, including advanced testing, constraint solving, function composition, and code proofs. Over 50 exercises and 20 sample programs are included. No prior math background required!
Learn SysML v2 with the ultimate guide for all skill levels in MBSE. Authored by insiders, it's your key to unlocking the full potential of system modeling and a passport to mastering your MBSE.
Чому проєкт-цукерочка через рік перетворюється на непідтримуване пекло? Тому що вас ніколи не вчили базі. Ця книга — єдина система координат, яка нарешті збере ваші розрізнені знання про ООП, GRASP, SOLID та GoF в одну цілісну картину.
Build a game from scratch in Go, no engine magic, just code you understand. You'll create Gopher Survivor, a Vampire Survivors–style action game, one concept per chapter: enemies, weapons, XP and level-ups, particles, a state machine, and a build you can ship.
All new language and library features of C++23 (for those who know C++20 already). The book presents all new language and library features of C++23. Learn how this impacts day-to-day programming, to benefit in practice, to combine new features, and to avoid all new traps. Buy early, pay less, free updates. Current Content: www.cppstd23.com Other leanpub books by this author:C++20C++17C++ Move Semantics
Big Kotlin pack
The following 5 books are included in this bundle...
Two practical books for teams building enterprise AI agents in production. Start with Claude Code, tools, MCP, evals, observability, and production agent workflows. Then secure those agents with bounded autonomy, AgentSecOps, RAG governance, identity controls, audit evidence, and regulatory readiness.
C++20, C++17, and MoveSemantics - The Complete Guides
Own all three books in the Architect Elevator series for 900 pages of large-scale IT architecture! First, rethink the role of the architect, and then apply it to two major anchors of any IT strategy: cloud computing and platforms.
This bundle includes the books “Residues: Time, Change and Uncertainty in Software Architecture” and “The Architect’s Paradox: Uncertainty and the Philosophy of Software Architecture” by Barry M O’Reilly. The books complement each other, with Residues giving a practical description of how to apply residuality theory and The Architect’s Paradox...
Ce lot comprend les quatre volumes du guide préparation à l'examen de certification Cisco CCNA 200-301.
The future of software belongs to engineers who know how to build with AI, not just use it. This five-book collection is your complete guide to mastering AI-assisted software development, production AI systems, business automation, prompt engineering, algorithmic trading, and enterprise-grade SaaS. Packed with practical frameworks, real-world case studies, production-ready architectures, and immediately applicable techniques, these books will help you move beyond AI experimentation to building reliable, scalable, high-impact systems that create measurable business value.
Interviews with Leanpub authors and special guests
The Leanpub Podcast
The Leanpub Podcast 🎙 Feat. Jay LaCroix, Author of Switching to Linux
Learn Linux TV - Len Epp interviews Jay LaCroix, creator of LearnLinuxTV and author of Switching to Linux, about helping Windows and Mac users make a confident move to Linux. Jay shares lessons from supporting Linux professionally for over 20 years, discusses choosing the right distribution, overcoming common fears, hardware compatibility, gaming, AI, and why Linux has never been more accessible. He also reflects on building one of YouTube’s largest Linux education communities.
Hands-on online course to learn all you need to know to get a Spring Boot application into production with AWS. Visit our landing page for a tour of the contents. Make sure to get familiar with all available bundle options before enrolling.
Master language models through mathematics, illustrations, and code―and build your own from scratch! This course includes nearly three hours of exclusive video interviews with the author, covering questions related to each of the six lessons included in the course.
Unlock the power of AI in your applications with this groundbreaking course on AI-driven application architecture. Discover practical patterns and principles for building intelligent, adaptive, and user-centric software systems that harness the potential of large language models. This course includes exclusive video interviews with the author.
This is a fast-paced, practical, and visual guide to the strange new world of Generative AI. It is like an extended version of Henrik's viral video with the same name.
Microservices are a great approach for building software at scale. But although the ideas at the root of microservices may sound simple, this is not a simple approach. There are several big traps along the way, and it's important to avoid them...
To ace your next Android developer job interview, focus on truly understanding the concepts, not just memorizing answers, and practicing how to apply them. With over 250 quiz questions, 370 practical and follow-up questions with full answers, and 60+ pro tips, this course helps you sharpen skills, understand the why, and prepare for real-world technical challenges. ISBN: 979-8285926436
Takes you from "how to use Kotlin" into "how Kotlin really works," revealing internal implementations, demystifying bytecode and compiler behavior, and uncovering the internals that shape the language. With hands-on Code Playgrounds for immediate practice and 158 interactive assessments to test and reinforce your understanding, this course doesn't just show you why everything is the way it is, it challenges you to prove you've mastered it. ISBN: 979-8243872744
This course gives you an intuitive understanding of the eight most important machine learning algorithms. It helps you get started using them in your own projects NOW -- in a single line of Python code. After finishing this course, you'll be able to select, understand, and implement the top 8 machine learning algorithms in your own projects.
This course is based on the 2025 edition of the best-selling Kubernetes book, that has been fully updated for the latest versions of Kubernetes and the latest industry trends. You won't find a better and more up-to-date book-based course on Kubernetes. Hand-crafted over the past 8 years by best-selling author Nigel Poulton.
Game Studio Starter Kit (6 Game Collection)
This track includes the following 6 courses...
About the Track: AI Masterclass Artificial Intelligence is reshaping the way we live, work, and build technology. The AI Masterclass Track brings together three powerful courses from world-class experts to give you a comprehensive, practical, and hands-on education in the age of AI. Whether you want to understand the big picture, apply AI...
Taking this bundle, you'll get a comprehensive set of courses that cover almost the whole surface of the .NET framework.The big topics that are covered:WPFMVVMSpecFlow and SeleniumLINQMultithreading and Parallel ProgrammingC# in Depth: Puzzles and GotchasAlgorithms and Data Structures in C#VS and R#and engineering practices:Unit Testing with...
This is the complete track to learn about essential Kotlin features and get ready for working in Kotlin in daily basis. It starts from essentials, and on the way reaches advanced topics like efficient collection processing or DSL creation.
Senior Android developer interviews rarely test memorized answers. They test whether you truly understand how things work under the hood. This track takes you beyond “how to use” into “how Android, Compose, and Kotlin actually work,” exploring internal implementations, bytecode and compiler behavior, and the system-level concepts that shape modern Android development.
Senior Android interviews test real understanding, not memorized answers. This track goes beyond “how to use Kotlin” into how Kotlin and Android actually work under the hood, including compiler behavior and internal concepts. With hands-on playgrounds and 400+ quiz and interview-style questions, it helps you practice reasoning through problems and confidently tackle senior-level technical interviews.
"Shut up and code." Laughter in the audience. The hacker had just plugged in his notebook and started sharing his screen to present his super-smart Python script. "Shut up and code" The letters written in a white literal coding font on black background was the hackers' home screen background mantra. At the time, I was a first-year computer...
Learn Python the Practical Way - In this course you learn all the basics of the Python programming language. It contains exercises, explanatory videos, an example solution and a quiz. This will enable you to apply your skills to a wide range of real world problems.A collection of more Python exercises - Exercises with solutions to continue...
Python is the fastest-growing major programming language on the planet. This practical course set will teach you Python in a hands-on, highly practical way that guarantees your success. All you need to go from zero to completing your own Python projects in a relaxed, student-centric, and fun environment. Create yourself a new skill that'll bring...
Taking this course bundle, you'll learn:SOLID principles (SRP, OCP, ISP, LSP, DIP) in-depthMeta principles: DRY, KISS, YAGNI, SoC, CQS, Law of Demeter, PoLADependency Injection in Depth: IoC or DI containers, best practices, and anti-patternsFunctional Programming in C#: purity and side effects, functional C# features, immutability,...
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Become a Leanpub author
Leanpub makes it easy to create, publish, and sell ebooks or online courses while earning industry-leading royalties. With 80% royalties on purchases of $7.99 or more (or 80% minus a small $0.50 fee for purchases under $7.99), your work earns what it deserves. For example, a $10 sale brings you $8, and selling 5,000 copies at $20 could mean $80,000 in your pocket!
Leanpub has already paid out $15,558,774.67 to authors. Whether you write in Markdown or upload PDF/EPUB files, Leanpub’s intuitive publishing tools simplify the process. Use our in-browser editor or sync with GitHub or Dropbox and publish your ebook with a single click. Plus, you decide when to release—during the writing process or upon completion.
Learn MoreAs an academic, I like Leanpub because it lets me write and get my ideas out there quickly. Leanpub is simply the best place for publishing my books.
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Book credits, course credits, and Free With Membership access for your team. Because Leanpub authors publish updates with one click, our AI, software, and business titles stay more current than print — so your team always learns from the latest material.
LIVE 3-HOUR ZOOM WORKSHOP
One live 3-hour workshop on Zoom — one hour each on planning and writing your book, writing faster with GhostAI, and marketing and selling it. You'll leave with a real book project to show for it.
PRIVATE 1-ON-1 BOOK PROGRAM WITH PETER ARMSTRONG
Private 1-on-1 sessions with Peter Armstrong, founder of Leanpub, every other week. Pick your tier — 4 60-minute or 6 90-minute sessions. It doesn't matter whether your book is half done or if you're stuck at page two. Win your money back as a service credit that fully covers the matching GlobalAuthor tier when you finish.
We're authors too, and we built Leanpub to be the platform we would love to use. It turns out, we weren't alone...
As an academic, I like Leanpub because it lets me write and get my ideas out there quickly. Leanpub is simply the best place for publishing my books.
Leanpub's book-creation tools allowed me to focus on creating the types of books I wanted to write instead of worrying how to create my own book publishing toolchain. I have never regretted using Leanpub to publish my ebooks.
Leanpub takes the pain out of publishing. They provide the tools, you provide the books and then magic happens.
I love using Leanpub because I can write my book using simple Markdown notation. Leanpub let's me focus on my content and they handle the rest.
Leanpub is a game changer for independent authors, removing the hassles associated with formatting, book production, and electronic sales, freeing up the time to do what we do best: write.
Leanpub helped me achieve my goal of publishing a book. Its simple, easy to use interface got my book up and making money within weeks, I love Leanpub!
Leanpub helped me gauge interest in my book, get payments early on when it was only a few chapters, and has got me a bunch of sales just from people browsing around the site.
Leanpub helps me see my books as I write them. Even better, I can find readers early, to read my books and offer suggestions. I can pivot, if I see the need.
Leanpub made it simple for me to run with my book idea and build my reputation in the Ruby community. I went from first draft to first sale in days, not months or years.
Four years ago, I joined Leanpub to just give it a try. Today, over 28,000 book sales later, I cannot help but say that I'm the biggest Leanpub fan on this planet!
Leanpub makes publishing your own book super easy. The fact that you can release updates continually helps with the mindset of getting a minimum version out ASAP and then iterating to improve.
I earn more royalties from my books on Leanpub than I do with well established publishers or through Amazon (which I publish on thanks to Leanpub's mobi conversion).
Leanpub allows me focus on content, takes care everything else and offers an amazing author royalty. It’s a fantastic platform for writing and publishing books.
I love that Leanpub makes writing and publishing a beautiful book so simple. I no longer spin my wheels with layouts and formats - Leanpub gets out of the way when it's time to write, and then automates everything when it's time to publish.
With Leanpub, the first person who purchased my book for $9.99 almost two years ago (and only received a preface, and two short intro chapters) has had access to almost every bit of knowledge I've gained in those two years, and *that's* the value.
Simple and lean, forces me to focus on writing and marketing, and pays excellent royalties.
Leanpub forces you to focus on writing and gives you immediate feedback. Allowing Leanpub to take care of the curation and delivery helped me focus on shipping my book.
While most eBook exporter apps today can generate PDF files and many support ePub, there's one tool we recommend above all after trying 8 of the most popular: Leanpub.
