Will Sentance

Codesmith

Will Sentance is the founder at Codesmith - a software engineering and machine learning tech residency with 5000+ graduates founding startups and working at organizations from OpenAI, Google, Kaiser Permanente and the UN. He is a Visiting Fellow working on AI at Oxford University, creator of the Hard Parts courses and of Icecomm, a developer platform for P2P video and data communication. Will graduated from Oxford University and Harvard University.

Workshops with Will Sentance

September 17 to 18, 2025 - 9:30am to 4:30pm Central Daylight Time

▶ LIVE NOW

JavaScript: The Hard Parts, v3

Will Sentance

Codesmith

Build a robust mental model of callbacks and higher order functions, closure, types & operators, asynchronous JavaScript and object-oriented JavaScript. Improve how you write code, debug more effectively and become the versatile problem-solving developer you aspire to be.

Watch the Replay

March 12, 2026 - 9:30am to 4:30pm Central Daylight Time

Details TBA

AI Engineering Fundamentals

Will Sentance

Codesmith

Build a deep under-the-hood understanding of AI-aided software engineering as an emerging paradigm of programming. Solve AI-enabled development problems via first-principles reasoning, not trial-and-error prompting, and be able to build modular, maintainable AI systems in production.

Details and Schedule

What They're Saying

I just completed "JavaScript: The Hard Parts, v2" by Will Sentance on Frontend Masters! Will is such a insightful and funny guy, making this whole learning experience quite entertaining. Can recommend. 100%.

Markus August

sobergklyver

Basically a map of how all frameworks and Vanilla JS work under the hood. Shows the complexities of UI development on the web, and why it is that way.

Rene Yibowei

I've been professional coding in Javascript for over 5 years now and this course made a hell lot of topics way clearer for me. Wish I would've seen this at the beginning of my career and will definitely recommend this to every new dev in my team.

Michael Glas

I’m a 5-year mid-level frontend dev. I’ve shipped apps, debugged race conditions, and argued about this in code reviews. I thought I knew JavaScript, but this advanced course proved me wrong. Hands-down the best learning experience of my career.

HyunBin Cho

Very well-explained course. Will uses a tactic of repeating the concepts over and over with visual explanations, which makes it easier to understand and remember what was said. Also, very good exercises and questions that helped consolidate the lessons.

Alícia Foureaux