Kent Beck is the creator of Extreme Programming (XP) and a pioneer of Test-Driven Development, pair programming, and the Agile Manifesto. A programmer with 52+ years of experience, he co-created JUnit with Erich Gamma, co-invented CRC cards and design patterns in software with Ward Cunningham, and spent seven years coaching at Facebook. Today he runs the 'Software Design: Tidy First?' Substack newsletter (123,500+ subscribers in 195 countries), hosts the Still Burning podcast, and explores augmented human-AI coding. In April 2026 he publicly announced a Parkinson's disease diagnosis, continuing his mission to help technologists feel safe in the world.
Luca Rossi is an Italian software engineer, entrepreneur, and writer based in Rome who turned a side project into one of the world's most-read engineering leadership newsletters. After co-founding and scaling travel startup Wanderio to 25M+ customers over eight years, he launched Refactoring in 2020 - a newsletter covering engineering management, software teams, and tech leadership. It now reaches 172,000+ subscribers, ranks in the top 10 Substack business newsletters, and generates approximately $300K/year in revenue, all operated solo. He also hosts the Refactoring Podcast, featuring guests like DHH, Kent Beck, and Camille Fournier, and in 2025 released Tolaria, a free open-source macOS knowledge base app built entirely with AI coding tools.
Hamza Muhammad Khan is a Karachi-based DevOps and cloud engineer who climbed from supporting small-scale WordPress deployments to managing infrastructure at DigitalOcean as an Engineer II before moving into banking-sector DevOps at Bank Al Habib Limited. Educated at NED University (Master's in Computer Science, 2023) and the University of Karachi (Bachelor's in Computer Software Engineering, 2019), he specializes in Linux administration, Kubernetes, Docker, and cloud platform operations - and moonlights as a blockchain tinkerer and machine-learning experimenter on GitHub.
Charlie Guo is a Stanford and YC alum who turned a personal obsession with AI into a 23,000-subscriber newsletter and a Developer Experience role at OpenAI. Through Artificial Ignorance at ignorance.ai, he writes at the intersection of software engineering and artificial intelligence - cutting through hype to deliver practical, hands-on insights for builders. He has co-founded multiple startups (ClassOwl, FanHero, Crowdmade), published a book of startup interviews called Unscalable, and created a widely-used Python library for Gmail with 1.8k GitHub stars - all while teaching himself AI engineering through relentless experimentation.
Dave Anderson spent 12+ years climbing Amazon's ladder from entry-level development manager to Technology Director and General Manager, then briefly served as the first CTO of Bezos Academy before achieving financial independence at 40 and walking away. Today he runs Scarlet Ink, a newsletter with 72,000+ subscribers offering rare insider perspective on big-tech careers, Amazon's leadership principles, and the mechanics of getting promoted without losing your mind.
Eugene Yan is a Principal Applied Scientist turned Member of Technical Staff at Anthropic, where he bridges cutting-edge AI research with production-scale systems. Formerly at Amazon for five years building real-time recommendation and LLM-powered systems for Kindle and Search, Eugene is equally well-known for his prolific writing: 209 blog posts, 420,000+ words published, and a newsletter with over 11,800 subscribers. His open-source repository applied-ml on GitHub has become a canonical reference for teams shipping machine learning in production. He lives in Seattle, snowboards on weekends, and writes like someone who actually wants you to understand.
Jacob Kaplan-Moss is one of the co-creators of Django, the Python web framework that powers Instagram, Pinterest, and thousands of other sites worldwide. After 25+ years building and leading software teams - from a Kansas newspaper where Django was born, to Heroku's security org, to 18F's government tech unit - he walked away from the tech industry in 2024, training as an EMT and volunteering with search and rescue. He remains a board member of the Django Software Foundation, publishes the 'jacobian' newsletter on engineering craft, and is known for his influential writing on hiring, documentation, and the 'programming talent myth'.
Dr. James Stanier is a computer science PhD turned engineering leader, author of three books on engineering management, and the mind behind The Engineering Manager newsletter with nearly 30,000 subscribers. He scaled Brandwatch's engineering team from startup to a $450M acquisition, led hundreds of engineers at Shopify, and now serves as CTO for the veterinary division at Nordhealth. His work distills what it actually takes to go from writing code to running organizations - without losing the technical edge.
Lorin Hochstein is a Staff Software Engineer specializing in reliability at Airbnb, and one of the most respected voices in incident analysis and resilience engineering. Known for rewriting Chaos Monkey at Netflix, co-authoring the O'Reilly book 'Ansible: Up and Running', and contributing to the 'Learning from Incidents' community, he bridges the gap between academic complexity theory and real-world software operations. His blog 'Surfing Complexity' and conference talks challenge engineers to think more deeply about why systems fail and how humans make sense of them.
Mark Erikson is the primary maintainer of Redux and creator of Redux Toolkit - the tools that power state management in millions of React applications worldwide. Known online as @acemarke, he became the de facto keeper of Redux in 2016 when Dan Abramov handed off the project. Since then, he has rebuilt Redux's documentation from the ground up, designed the hooks API in React-Redux, and created Redux Toolkit to eliminate the boilerplate that once made Redux notorious. He is a Senior Front-End Engineer at Replay.io and a tireless community fixture - answering questions on Discord, Reddit, Bluesky, and anywhere else developers congregate online.
Mat Ryer is a London-based Go programmer, open-source creator, author, and long-time host of the Go Time podcast. Known for building beloved Go tools like xbar (18k+ GitHub stars), moq, and the `is` testing framework, he has been writing Go since before its v1 release. He authored 'Go Programming Blueprints' and spent years as a principal engineer at Grafana Labs building AI agents and observability tools. His characteristic blend of deep technical craft, game-show energy, and dry British wit has made him one of the Go community's most recognizable voices.
Michael Feathers is a software consultant, author, and Chief Architect at Globant whose 2004 book 'Working Effectively with Legacy Code' redefined how developers think about untested code - coining the now-universal definition that legacy code is simply code without tests. With over 25 years consulting hundreds of organizations, he pioneered dependency-breaking techniques that gave teams a way into codebases they feared. Today he explores how AI reshapes programming, writes the 'mechanisms' newsletter on Substack, and continues speaking at conferences worldwide.
Mihail Eric is a Palo Alto-based ML engineer, researcher, educator, and serial founder who has spent a decade bridging cutting-edge AI research and production systems. A Stanford CS alumnus who studied under Christopher Manning and Percy Liang, he built some of Amazon Alexa's earliest large language models, co-founded YC-backed Storia AI, founded Confetti AI (acquired by Towards AI), and now teaches 'The Modern Software Developer' at Stanford while running a newsletter for 17,000+ AI practitioners.
Nelson Elhage is a systems engineer turned AI safety researcher who has left fingerprints across the modern software stack. At Anthropic, he co-authored foundational work on mechanistic interpretability and transformer circuits that shaped how the field understands language models. Before that, he was employee ~30 at Stripe and a founding engineer of Sorbet, the Ruby typechecker now used across one of the world's largest payment platforms. His open-source tools - reptyr, livegrep, and ministrace - are staples in the Linux hacker's toolkit. He blogs at 'Made of Bugs' and runs a Buttondown newsletter on computer systems.
Russ Cox is a Distinguished Engineer at Google and the longtime technical lead of the Go programming language, the open-source language he helped shape for over a decade. Known for foundational work on RE2 (a safe, linear-time regex engine), Plan 9 from User Space, and Go's module system, he bridges deep computer science theory with production-grade engineering. After stepping down as Go tech lead in September 2024, he shifted focus to AI-powered open source tooling - building Gaby and Oscar, agent systems designed to help maintainers with the unglamorous but essential work of keeping software alive.
Theo Schlossnagle is a serial entrepreneur, software engineer, and investor who has spent three decades pushing the edges of distributed systems and scalable infrastructure. Founder of OmniTI (1997), Circonus (2010), and General Partner at L42 Ventures, he is a Distinguished Member of the ACM, an IEEE member, co-chair of ACM's Queue Magazine, and the author of 'Scalable Internet Architectures'. Beyond software, he runs a butcher shop in Maryland, maintains a farm retreat in West Virginia, and has left Twitter for greener (and more federated) social pastures.
Azhar Hussain is a Karachi-based software engineering leader with over 25 years of experience building and scaling engineering teams across Pakistan and the Gulf. He is the co-founder and former CTO of ChargeUp, a Pakistani fintech-EV startup, and currently serves as CTO of Aladdin Informatics, a company digitizing small retail stores across Pakistan. A 3-time hackathon champion, angel investor, prolific mentor, and IAB member at FAST-NUCES, Azhar sits at the intersection of enterprise architecture, startup culture, and Pakistan's growing tech ecosystem.