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The Pragmatic Engineer

Gergely Orosz
The Pragmatic Engineer
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  • From Swift to Mojo and high-performance AI Engineering with Chris Lattner
    Brought to You By:•⁠ Statsig ⁠ — ⁠ The unified platform for flags, analytics, experiments, and more. Companies like Graphite, Notion, and Brex rely on Statsig to measure the impact of the pace they ship. Get a 30-day enterprise trial here.•⁠ Linear – The system for modern product development. Linear is a heavy user of Swift: they just redesigned their native iOS app using their own take on Apple’s Liquid Glass design language. The new app is about speed and performance – just like Linear is. Check it out.—Chris Lattner is one of the most influential engineers of the past two decades. He created the LLVM compiler infrastructure and the Swift programming language – and Swift opened iOS development to a broader group of engineers. With Mojo, he’s now aiming to do the same for AI, by lowering the barrier to programming AI applications.I sat down with Chris in San Francisco, to talk language design, lessons on designing Swift and Mojo, and – of course! – compilers. It’s hard to find someone who is as enthusiastic and knowledgeable about compilers as Chris is!We also discussed why experts often resist change even when current tools slow them down, what he learned about AI and hardware from his time across both large and small engineering teams, and why compiler engineering remains one of the best ways to understand how software really works.—Timestamps(00:00) Intro(02:35) Compilers in the early 2000s(04:48) Why Chris built LLVM(08:24) GCC vs. LLVM(09:47) LLVM at Apple (19:25) How Chris got support to go open source at Apple(20:28) The story of Swift (24:32) The process for designing a language (31:00) Learnings from launching Swift (35:48) Swift Playgrounds: making coding accessible(40:23) What Swift solved and the technical debt it created(47:28) AI learnings from Google and Tesla (51:23) SiFive: learning about hardware engineering(52:24) Mojo’s origin story(57:15) Modular’s bet on a two-level stack(1:01:49) Compiler shortcomings(1:09:11) Getting started with Mojo (1:15:44) How big is Modular, as a company?(1:19:00) AI coding tools the Modular team uses (1:22:59) What kind of software engineers Modular hires (1:25:22) A programming language for LLMs? No thanks(1:29:06) Why you should study and understand compilers—The Pragmatic Engineer deepdives relevant for this episode:•⁠ AI Engineering in the real world• The AI Engineering stack• Uber's crazy YOLO app rewrite, from the front seat• Python, Go, Rust, TypeScript and AI with Armin Ronacher• Microsoft’s developer tools roots—Production and marketing by ⁠⁠⁠⁠⁠⁠⁠⁠https://penname.co/⁠⁠⁠⁠⁠⁠⁠⁠. For inquiries about sponsoring the podcast, email [email protected]. Get full access to The Pragmatic Engineer at newsletter.pragmaticengineer.com/subscribe
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  • Beyond Vibe Coding with Addy Osmani
    Brought to You By:•⁠ Statsig ⁠ — ⁠ The unified platform for flags, analytics, experiments, and more. •⁠ Linear – The system for modern product development. —Addy Osmani is Head of Chrome Developer Experience at Google, where he leads teams focused on improving performance, tooling, and the overall developer experience for building on the web. If you’ve ever opened Chrome’s Developer Tools bar, you’ve definitely used features Addy has built. He’s also the author of several books, including his latest, Beyond Vibe Coding, which explores how AI is changing software development.In this episode of The Pragmatic Engineer, I sit down with Addy to discuss how AI is reshaping software engineering workflows, the tradeoffs between speed and quality, and why understanding generated code remains critical. We dive into his article The 70% Problem, which explains why AI tools accelerate development but struggle with the final 30% of software quality—and why this last 30% is tackled easily by software engineers who understand how the system actually works.—Timestamps(00:00) Intro(02:17) Vibe coding vs. AI-assisted engineering(06:07) How Addy uses AI tools(13:10) Addy’s learnings about applying AI for development(18:47) Addy’s favorite tools(22:15) The 70% Problem(28:15) Tactics for efficient LLM usage(32:58) How AI tools evolved(34:29) The case for keeping expectations low and control high(38:05) Autonomous agents and working with them(42:49) How the EM and PM role changes with AI(47:14) The rise of new roles and shifts in developer education(48:11) The importance of critical thinking when working with AI(54:08) LLMs as a tool for learning(1:03:50) Rapid questions—The Pragmatic Engineer deepdives relevant for this episode:•⁠ Vibe Coding as a software engineer•⁠ How AI-assisted coding will change software engineering: hard truths•⁠ AI Engineering in the real world•⁠ The AI Engineering stack•⁠ How Claude Code is built—Production and marketing by ⁠⁠⁠⁠⁠⁠⁠⁠https://penname.co/⁠⁠⁠⁠⁠⁠⁠⁠. For inquiries about sponsoring the podcast, email [email protected]. Get full access to The Pragmatic Engineer at newsletter.pragmaticengineer.com/subscribe
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  • Google’s engineering culture
    Brought to You By:•⁠ Statsig ⁠ — ⁠ The unified platform for flags, analytics, experiments, and more. Something interesting is happening with the latest generation of tech giants. Rather than building advanced experimentation tools themselves, companies like Anthropic, Figma, Notion and a bunch of others… are just using Statsig. Statsig has rebuilt this entire suite of data tools that was available at maybe 10 or 15 giants until now. Check out Statsig.•⁠ Linear – The system for modern product development. Linear is just so fast to use – and it enables velocity in product workflows. Companies like Perplexity and OpenAI have already switched over, because simplicity scales. Go ahead and check out Linear and see why it feels like a breeze to use.—What is it really like to be an engineer at Google?In this special deep dive episode, we unpack how engineering at Google actually works. We spent months researching the engineering culture of the search giant, and talked with 20+ current and former Googlers to bring you this deepdive with Elin Nilsson, tech industry researcher for The Pragmatic Engineer and a former Google intern.Google has always been an engineering-driven organization. We talk about its custom stack and tools, the design-doc culture, and the performance and promotion systems that define career growth. We also explore the culture that feels built for engineers: generous perks, a surprisingly light on-call setup often considered the best in the industry, and a deep focus on solving technical problems at scale.If you are thinking about applying to Google or are curious about how the company’s engineering culture has evolved, this episode takes a clear look at what it was like to work at Google in the past versus today, and who is a good fit for today’s Google.Jump to interesting parts:(13:50) Tech stack(1:05:08) Performance reviews (GRAD)(2:07:03) The culture of continuously rewriting things—Timestamps(00:00) Intro(01:44) Stats about Google(11:41) The shared culture across Google(13:50) Tech stack(34:33) Internal developer tools and monorepo(43:17) The downsides of having so many internal tools at Google(45:29) Perks(55:37) Engineering roles(1:02:32) Levels at Google (1:05:08) Performance reviews (GRAD)(1:13:05) Readability(1:16:18) Promotions(1:25:46) Design docs(1:32:30) OKRs(1:44:43) Googlers, Nooglers, ReGooglers(1:57:27) Google Cloud(2:03:49) Internal transfers(2:07:03) Rewrites(2:10:19) Open source(2:14:57) Culture shift(2:31:10) Making the most of Google, as an engineer(2:39:25) Landing a job at Google—The Pragmatic Engineer deepdives relevant for this episode:•⁠ Inside Google’s engineering culture•⁠ Oncall at Google•⁠ Performance calibrations at tech companies•⁠ Promotions and tooling at Google•⁠ How Kubernetes is built•⁠ The man behind the Big Tech comics: Google cartoonist Manu Cornet—Production and marketing by ⁠⁠⁠⁠⁠⁠⁠⁠https://penname.co/⁠⁠⁠⁠⁠⁠⁠⁠. For inquiries about sponsoring the podcast, email [email protected]. Get full access to The Pragmatic Engineer at newsletter.pragmaticengineer.com/subscribe
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  • Python, Go, Rust, TypeScript and AI with Armin Ronacher
    Brought to You By:•⁠ Statsig ⁠ — ⁠ The unified platform for flags, analytics, experiments, and more. Most teams end up in this situation: ship a feature to 10% of users, wait a week, check three different tools, try to correlate the data, and you’re still unsure if it worked. The problem is that each tool has its own user identification and segmentation logic. Statsig solved this problem by building everything within a unified platform. Check out Statsig.•⁠ Linear – The system for modern product development. In the episode, Armin talks about how he uses an army of “AI interns” at his startup. With Linear, you can easily do the same: Linear’s Cursor integration lets you add Cursor as an agent to your workspace. This agent then works alongside you and your team to make code changes or answer questions. You’ve got to try it out: give Linear a spin and see how it integrates with Cursor.—Armin Ronacher is the creator of the Flask framework for Python, was one of the first engineers hired at Sentry, and now the co-founder of a new startup. He has spent his career thinking deeply about how tools shape the way we build software.In this episode of The Pragmatic Engineer Podcast, he joins me to talk about how programming languages compare, why Rust may not be ideal for early-stage startups, and how AI tools are transforming the way engineers work. Armin shares his view on what continues to make certain languages worth learning, and how agentic coding is driving people to work more, sometimes to their own detriment. We also discuss: • Why the Python 2 to 3 migration was more challenging than expected• How Python, Go, Rust, and TypeScript stack up for different kinds of work • How AI tools are changing the need for unified codebases• What Armin learned about error handling from his time at Sentry• And much more Jump to interesting parts:• (06:53) How Python, Go, and Rust stack up and when to use each one• (30:08) Why Armin has changed his mind about AI tools• (50:32) How important are language choices from an error-handling perspective?—Timestamps(00:00) Intro(01:34) Why the Python 2 to 3 migration created so many challenges(06:53) How Python, Go, and Rust stack up and when to use each one(08:35) The friction points that make Rust a bad fit for startups(12:28) How Armin thinks about choosing a language for building a startup(22:33) How AI is impacting the need for unified code bases(24:19) The use cases where AI coding tools excel (30:08) Why Armin has changed his mind about AI tools(38:04) Why different programming languages still matter but may not in an AI-driven future(42:13) Why agentic coding is driving people to work more and why that’s not always good(47:41) Armin’s error-handling takeaways from working at Sentry (50:32) How important is language choice from an error-handling perspective(56:02) Why the current SDLC still doesn’t prioritize error handling (1:04:18) The challenges language designers face (1:05:40) What Armin learned from working in startups and who thrives in that environment(1:11:39) Rapid fire round—The Pragmatic Engineer deepdives relevant for this episode:—Production and marketing by ⁠⁠⁠⁠⁠⁠⁠⁠https://penname.co/⁠⁠⁠⁠⁠⁠⁠⁠. For inquiries about sponsoring the podcast, email [email protected]. Get full access to The Pragmatic Engineer at newsletter.pragmaticengineer.com/subscribe
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  • Hypergrowth startups: Uber and CloudKitchens with Charles-Axel Dein
    Brought to You By:•⁠ Statsig ⁠ — ⁠ The unified platform for flags, analytics, experiments, and more. Statsig built a complete set of data tools that allow engineering teams to measure the impact of their work. This toolkit is SO valuable to so many teams, that OpenAI - who was a huge user of Statsig - decided to acquire the company, the news announced last week. Talk about validation! Check out Statsig.•⁠ Linear – The system for modern product development. Here’s an interesting story: OpenAI switched to Linear as a way to establish a shared vocabulary between teams. Every project now follows the same lifecycle, uses the same labels, and moves through the same states. Try Linear for yourself.—What does it take to do well at a hyper-growth company? In this episode of The Pragmatic Engineer, I sit down with Charles-Axel Dein, one of the first engineers at Uber, who later hired me there. Since then, he’s gone on to work at CloudKitchens. He’s also been maintaining the popular Professional programming reading list GitHub repo for 15 years, where he collects articles that made him a better programmer. In our conversation, we dig into what it’s really like to work inside companies that grow rapidly in scale and headcount. Charles shares what he’s learned about personal productivity, project management, incidents, interviewing, plus how to build flexible skills that hold up in fast-moving environments. Jump to interesting parts:• 10:41 – the reality of working inside a hyperscale company• 41:10 – the traits of high-performing engineers• 1:03:31 – Charles’ advice for getting hired in today’s job marketWe also discuss:• How to spot the signs of hypergrowth (and when it’s slowing down)• What sets high-performing engineers apart beyond shipping• Charles’s personal productivity tips, favorite reads, and how he uses reading to uplevel his skills• Strategic tips for building your resume and interviewing • How imposter syndrome is normal, and how leaning into it helps you grow• And much more!If you’re at a fast-growing company, considering joining one, or looking to land your next role, you won’t want to miss this practical advice on hiring, interviewing, productivity, leadership, and career growth.—Timestamps(00:00) Intro(04:04) Early days at Uber as engineer #20(08:12) CloudKitchens’ similarities with Uber(10:41) The reality of working at a hyperscale company(19:05) Tenancies and how Uber deployed new features(22:14) How CloudKitchens handles incidents(26:57) Hiring during fast-growth(34:09) Avoiding burnout(38:55) The popular Professional programming reading list repo(41:10) The traits of high-performing engineers (53:22) Project management tactics(1:03:31) How to get hired as a software engineer(1:12:26) How AI is changing hiring(1:19:26) Unexpected ways to thrive in fast-paced environments(1:20:45) Dealing with imposter syndrome (1:22:48) Book recommendations (1:27:26) The problem with survival bias (1:32:44) AI’s impact on software development (1:42:28) Rapid fire round—The Pragmatic Engineer deepdives relevant for this episode:•⁠ Software engineers leading projects•⁠ The Platform and Program split at Uber•⁠ Inside Uber’s move to the Cloud•⁠ How Uber built its observability platform•⁠ From Software Engineer to AI Engineer – with Janvi Kalra—Production and marketing by ⁠⁠⁠⁠⁠⁠⁠⁠https://penname.co/⁠⁠⁠⁠⁠⁠⁠⁠. For inquiries about sponsoring the podcast, email [email protected]. Get full access to The Pragmatic Engineer at newsletter.pragmaticengineer.com/subscribe
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About The Pragmatic Engineer

Software engineering at Big Tech and startups, from the inside. Deepdives with experienced engineers and tech professionals who share their hard-earned lessons, interesting stories and advice they have on building software. Especially relevant for software engineers and engineering leaders: useful for those working in tech. newsletter.pragmaticengineer.com
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