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steve kinney skip to main content steve kinney sigithub siinstagram six siyoutube writing courses projects components newsletter i m a software engineer educator and engineering leader based in denver most recently i spent a year as an entrepreneur in residence at redpoint where i built ai native developer tools weft an open source durable execution platform tribunal a platform for managing code review agents cinder a component library for quickly prototyping ai interfaces and an agent runtime embedded in a chrome extension before that i joined temporal as employee 35 and its founding front end engineer i architected the open source temporal ui the temporal cloud product experience the self service signup flow a design system spanning product and marketing and a visual studio code extension temporal grew from a series a startup into a company valued at 5 billion with more than 1 000 cloud customers while i was there so i got to work across the full arc from no interface exists yet to enterprise customers depending on it in production my role at temporal was head of engineering for frontend and developer tools i built and led the team from just me to eight engineers stayed technical through architecture and design reviews and made the call to hand major product surfaces to staff engineers instead of becoming the bottleneck along the way i promoted four engineers and mentored my own successor into the role earlier in my career i was the very first front end architect at twilio and sendgrid i also led the team that shipped the new twilio sendgrid marketing campaigns product in under six months after the initial estimates were hovering around two years last i checked that product was still in production and bringing in roughly 15 million in annual revenue i still care deeply about front end architecture but my work has never really been just front end the common thread through all of it is making complicated systems usable distributed systems developer platforms and now ai systems i tend to live at the intersection of product thinking technical architecture and developer experience that also shows up in my writing lately i ve been researching and publishing on agent loops memory systems for ai agents ai gateways and durable workflow systems prompt engineering across the openai anthropic and gemini apis in this post mcp apps and ai tooling and what it takes to run untrusted code safely today i m an instructor at frontend masters where i teach courses including open source ai with python hugging face and cursor claude code professional ai setup i also founded the front end engineering program at turing school i actually started my career in public education i was an nyc public school teacher in high need schools across manhattan brooklyn and queens i technically had my principal s license but i never ended up using it i ve co founded dinosaurjs a javascript conference in denver spoken at events like jsconf and railsconf and authored electron in action though technology moves faster than books so consider that a historical artifact at this point thoughts on ai safety june 19 2026 using codex from claude getting a second opinion from a different model family june 4 2026 multi model agentic coding letting the other model do the typing june 4 2026 sentinels the quiet power of a touched file june 1 2026 claude ultraplan planning in the cloud executing wherever april 7 2026 playwright vs chrome devtools mcp driving vs debugging april 6 2026 entering the mind of ralph wiggum march 31 2026 memory systems for ai agents what the research says and what you can actually build march 25 2026 temporal s developer skill is a promising first draft march 24 2026 the anatomy of an agent loop march 19 2026 agent skills stripped of hype march 17 2026 designing a build system that runs untrusted code march 16 2026 designing an ai gateway and durable workflow system march 13 2026 mcp apps and the missing middle of ai tooling march 12 2026 my ridiculous ai assisted development workflow march 11 2026 rss feed recordings i am lucky enough to teach a bunch of courses with my friends at master dev we ve been working together since 2016 before i was a teacher i was a customer back when i was learning the ropes i can t recommend them highly enough you can find the most up to date list here deploying web applications on aws v3 confidently navigate the aws console and ship real apps scaffold lightning fast infrastructure with s3 static hosting and cloudfront global cdn caching 3h 38m playwright automated testing ai workflows catch broken uis before they ship with playwright build rock solid verification loops that provide feedback to agentic coding tools and give you the confidence that your code is production ready 4h 34m enterprise ui development microfrontends testing code quality architect large successful frontend systems from monoliths to microfrontends to monorepos learn best practices for maintaining complex codebases while shipping high quality software 5h 12m react and typescript v3 leverage typescript in your react codebase for critical type safety catching errors early and delivering a better developer experience for your entire team 4h 23m react performance v2 ship high performance react applications leverage react 19 s performance strategies for hydration suspense resource loading and server actions utilize memoization and virtualization and quickly diagnose performance bottlenecks and costly re renders 4h 11m cursor claude code professional ai setup boost your coding productivity with ai assisted tools and agents use cursor and claude code for precise inline edits or to delegate larger tasks to background agents 3h 43m open source ai with python hugging face go beyond anthropic and openai build custom ai workflows with hugging face fine tune models and generate images with stable diffusion 4h 33m tailwind css 4 learn tailwind css s utility first approach for responsive and customizable web designs master themes layers responsive breakpoints dark mode and more to create maintainable user interfaces 4h 28m fullstack typescript v2 feat zod find the end to end type safety strategy that works with your stack share typescript types across client and server apps write bullet proof zod schemas use trpc queries and mutations explore prisma for database migrations and schema generation 4h 9m become a vs code power user use vs code like a pro and build apps faster search navigate and refactor code quickly debug your apps without leaving the editor and automate complex or repetitive routines with custom tasks 5h 13m testing fundamentals learn the basics of testing and apply test driven development techniques to your workflow gain practical experience writing unit and integration tests while exploring common testing tools 4h 30m web security v2 learn to identify and mitigate common vulnerabilities implement protection strategies and secure your web applications against various attack vectors 4h 29m design systems with storybook v2 learn to create scalable design systems with storybook build reusable ui components test components implement dark mode and generate comprehensive documentation 4h 10m figma for developers v2 learn to use figma s developer friendly features like constraints auto layout component properties and css generation to efficiently build and translate designs to code bridge the gap between design and development 4h 12m vite master vite the modern build tool for faster and leaner web development learn to integrate with react optimize assets and extend with plugins see what it s like to actually enjoy using your build tools 4h 11m view all courses full course walkthroughs self testing ai agents build the feedback loops that let coding agents catch their own mistakes playwright visual regression runtime probes custom mcps review bots a static layer and ci so you stop being the verification step deploying web applications on aws deploy scale and secure frontend applications on aws from s3 and cloudfront to lambda api gateway and dynamodb without ever needing to become a full time cloud engineer enterprise ui scale frontend applications beyond a single team spa with composition patterns module federation operational infrastructure and migration strategies react performance profile measure and optimize react applications from understanding reconciliation and re renders to memoization code splitting and react 19 s concurrent features react with typescript build type safe react applications with typescript and react 19 covering hooks reducers context component apis and generics ai fundamentals with python get hands on with ai development using python and hugging face from tokenization and attention to fine tuning models and generating images with stable diffusion developing with ai tools learn practical workflows for cursor claude code mcp and agentic software development with current installation context permission and review guidance tailwind learn tailwind css from utility first fundamentals through design tokens responsive layouts dark mode and the new features in tailwind 4 full stack typescript wire up end to end type safety across the frontend and backend with typescript express zod trpc and branded types visual studio code get more out of vs code with advanced workflows debugging tools customizations extensions and keyboard shortcuts that speed up daily development introduction to testing build confidence in your codebase with practical testing techniques covering assertions mocking integration tests and testing strategy web security understand modern web security fundamentals from authentication and authorization to xss csrf and practical mitigation techniques figma for developers learn figma s developer friendly features constraints auto layout component properties variables and css generation to bridge the gap between design and code building design systems in storybook build a scalable design system with storybook creating reusable components writing interaction tests implementing dark mode and generating documentation enter your email