Bitfield Consulting

Hi, I’m John Arundel, I'm here to help you learn and master software engineering in Go or Rust. I’ve been writing software for about 40 years, and I think I’m starting to figure out how to do it. Would you care to join me?

I’ve trained thousands of developers at Google, GitHub, HashiCorp, Microsoft, Facebook… the list goes on. I’m the author of many books including The Deeper Love of Go, The Secrets of Rust: Tools, Cloud Native DevOps with Kubernetes, and Code For Your Life. With my help, you’ll learn to design robust, elegant programs with delightful APIs, guided by rigorous tests, and to amplify your brainpower using AI tools and coding agents.

And now I’m offering regular, original, free resources for learning Go and Rust, as well as help with direction in your tech career, and maybe even independent working (if that’s where you want to go). Join the fun today and learn something new: just tick the boxes for the topics you’re interested in (see previous newsletters).

Let’s get started!

Books

Featured

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The Complete Go Library

$119.80

Now, for the first time, you can buy the complete set of my Go books as a single bundle—five books for the price of four!

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The Complete Career Library

$89.85

Get the complete set of my career coaching books as a single bundle—four books for the price of three!

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The Deeper Love of Go

$29.95

Introduces the Go programming language for complete beginners, as well as those with experience programming in other languages.

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The Power of Go: Tools

$29.95

Take your next step in Go, with my guide to building powerful, robust tools and packages that solve user problems.

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The Secrets of Rust: Tools

$29.95

Master the world’s favourite programming language with my friendly guide to building durable Rust software.

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Master of Your Domain

$29.95

Build your own independent business as a knowledge worker with my complete guide to success.

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Courses

Featured

Master Go

from $149.95

Learn what great software engineering looks like in Go, with my friendly one-to-one coaching and guidance.

Master Rust

from $149.95

Rust isn’t difficult, it’s just different. Learn why, and master this modern, powerful language with my friendly guidance.

Master AI

from $149.95

A one-to-one intensive training course on leveraging AI agents and coding tools for software development.

Dev skills

from $149.95

Do you have the skills you need to thrive as a developer in fast-changing times? I’ll help you fill in the gaps.

Career growth

from $149.95

Take back control of your career, and build the life you want, with my practical, encouraging coaching sessions.

Focus & growth

from $149.95

Learn to relax, focus, handle stress, and build great habits, with my friendly, supportive life coaching.

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Training

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Rust team training

from $1,195.00

Ramp up your team’s skills fast and get them productive in Rust, with my industry-leading training program.

Go team training

from $1,195.00

Get your developers up to speed in Go, with my flexible, cost-effective training sessions for all levels from beginner to pro.

AI team training

from $1,195.00

Skill up your team with AI agents and tools, so they can deliver faster and better, with my complete AI course.

Featured

The best Rust books for 2026, reviewed

There are many Rust books, but these are my favourites—and I think you’ll like them too. Here are my reviews of what I think are the truly essential Rust books available today.

What are the best Go books in 2026?

What are the best Go books this year? Read my (relatively) unbiased recommendations for the Go books you should absolutely buy and read right now, whether you’re a beginner or expert Gopher.

Bitfield Institute of Technology

The Bitfield Institute of Technology (BIT) is a software engineering school that offers remote training and certifications in Go and Rust development to students worldwide.

Posts

Featured

The best Rust books for 2026, reviewed

There are many Rust books, but these are my favourites—and I think you’ll like them too. Here are my reviews of what I think are the truly essential Rust books available today.

Racing with disaster: data races in Go

Writing concurrent programs is easy, but understanding why they don’t work is hard. In this post, we’ll talk about data races, why they’re a problem, and how they arise in Go programs.

What are the best Go books in 2026?

What are the best Go books this year? Read my (relatively) unbiased recommendations for the Go books you should absolutely buy and read right now, whether you’re a beginner or expert Gopher.

Rust vs Go in 2026

Which is a better choice, Rust or Go? Which language should you choose for your next project, and why? How do the two compare in areas like performance, simplicity, safety, features, scale, and concurrency?

That mockingbird won't sing: a mock API server in Rust

Faking it till you make it isn’t always the best strategy in life, but it can be a useful one in software engineering. Here’s an easy way to create a local HTTP server for testing Rust API clients.

When doomed stubs attack: blockchain voting and proof of work

If cryptocurrencies aren’t managed by any central authority, what’s to stop anyone just printing themselves some money and spending it on pizza? The answer, excitingly, is “math”.