Platforms for developers

One to one coaching with a co-founder of DesignGurus.io and the creator of the Grokking series, now at Amazon after building and scaling distributed systems and data storage infrastructure at Meta, Microsoft and Hulu. Covers system design, data structures and algorithms, interview strategy and career direction.

Coding and system design coaching with a co-founder of DesignGurus.io, now at Amazon, who was a Senior Development Lead on Azure Storage at Microsoft and a Software Engineer Lead at Meta. Strongest on distributed systems, scalable architecture and interview strategy.

A roster of coaches working at Meta, Microsoft, Amazon, Snap and Cloudflare, bookable for coding, system design or general career coaching. Pick the coach whose background matches the loop you are facing.

Live mock interviews with senior engineers, covering coding, system design or a target company format, each ending in a structured debrief. Rehearsal under real conditions is the part of preparation people skip.

Practice interviews with an AI interviewer that asks follow up questions and gives structured feedback, available whenever you are free rather than whenever a human is. Cheaper and more repeatable than human mocks, and a sensible first stage before you book one.

Design prompts to work through under time pressure, which is the part of preparation everyone skips. Reading designs builds recognition, producing them builds the skill being tested.

A browsable practice library organised by pattern and by data structure rather than by an arbitrary difficulty number, so you can drill exactly the weakness you found this week. Filterable by company as well.

Thousands of questions and exercises across Linux, networking, Docker, Kubernetes, CI/CD, cloud, SQL and Terraform, with answers. Good for finding the holes in what you think you know, whether or not there is an interview coming.

Hundreds of algorithms implemented and readable, in Python and most other languages. Useful in two ways: as a reference when a description in a textbook has not clicked, and as a first open source contribution, because adding a missing algorithm is a genuinely approachable pull request.

Build something real tutorials sorted by language, from a web server in Go to a text editor in C. If you have finished a course and now feel stuck with nothing to make, start here rather than starting another course.

Step by step tutorials for building your own database, git, shell, compiler, docker or operating system from scratch. This is the best answer to the question of what to build when tutorials stop teaching you anything. Pick the one that scares you slightly and give it a month.

Dozens of agent implementations as Jupyter notebooks, from a simple conversational bot up to multi agent workflows, each one small enough to read in a sitting. The value is in the range: you can compare how the same problem is solved five different ways instead of trusting one tutorial.

Free peer mock interviews where you interview someone else and then they interview you, with the question and solution supplied to each interviewer. The price is the strongest argument for it.

An interactive tutorial that draws the commit graph as you run commands, so you can watch what rebase, merge and cherry pick actually do. The fastest way to build a mental model of Git.

A repository that exists purely so you can make your first pull request, walking through fork, branch, commit and pull request on a project that wants your trivial change. Removes the fear, which is the actual barrier.

Sessions on the decision you have been going back and forth on: which offer, whether to switch, what to learn next, or a resume and LinkedIn review. Includes a short session priced for final year students and new graduates.

Free mentorship sessions with volunteer mentors across engineering, design and product, bookable straight from open calendars. The price makes it the obvious first thing to try.

Practice exercises in over seventy languages where a volunteer mentor reviews your solution and discusses how to improve it. Free code review from a human is genuinely rare.

Long term paid mentorship on a monthly subscription, with mentors from named companies and ongoing contact between calls. Structured for a relationship over months rather than a single session.

On demand help from experienced developers, billed by the minute, for when you are genuinely stuck on a specific technical problem rather than seeking career advice. Different from mentorship and occasionally exactly what you need.

A startup job platform where listings show salary and equity ranges upfront and applications often go straight to a founder. Worth a profile even when you are not looking, because the inbound is qualified.

Thousands of hours of free interactive curriculum with certifications, covering responsive design, JavaScript, data structures, backend work, Python and data analysis. The lowest barrier entry point in the field.

Real design files and a brief, then you build it and get community feedback. It solves the specific problem of not knowing what to build once tutorials run out.

Free SQL practice against a real database in the browser, running from simple selects up through joins, aggregates and window functions, with hints and answers. The most efficient way to go from reading SQL to writing it.