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Product Design

UX heuristics, research, interface craft and systems thinking — ending in the only thing a design portfolio is actually judged on: a case study that shows how you think.

6 topics 18 resources 5 projects 65h of material

Finish this and you can research a real problem, design a solution against constraints you can name, build it in a system rather than as one-off screens, and defend every decision in a portfolio review.

  1. Design principles

    Beginner

    The perceptual and cognitive rules that make an interface feel obvious. Learn them as constraints, not decoration.

    Build this

    A heuristic evaluation of something you use daily

    Pick an app you use and dislike. Walk one complete task through all ten of Nielsen's heuristics and document every violation with a screenshot and a proposed fix.

    This is a real deliverable that working designers produce. Doing one properly is more persuasive than three redesign concepts.

    Done when: An annotated evaluation with severity ratings and specific fixes.

  2. Research basics

    Beginner

    How to find out what people actually do, rather than what they tell you they do — with a sample size you can realistically get.

    Build this

    A usability test with five real people

    Write a test script with three tasks. Run it with five people who are not designers, recording where they hesitate rather than what they say afterwards.

    Then synthesise: what failed, how often, how badly. The gap between what people say and what they do is the whole lesson.

    Done when: A test script, session notes, and a prioritised findings summary.

  3. Typography, colour and accessibility

    Intermediate

    The three craft skills that most visibly separate amateur work from professional — and the one legal obligation among them.

    Build this

    A palette and type scale that passes in both themes

    Build a semantic colour palette — surface, text, border, accent, states — and a type scale, then prove every pairing meets contrast requirements in both light and dark.

    Most portfolios show a colour swatch grid. Showing the contrast matrix instead demonstrates you understand what the palette is for.

    Done when: A documented palette and type scale with a passing contrast matrix for both themes.

  4. Design systems

    Advanced

    Tokens, components and the documentation that makes them get used. Systems thinking is what the job becomes past junior level.

    Build this

    A small system, documented like a real one

    Build eight to ten components with tokens, variants and states. Then document each one the way GOV.UK does: when to use it, when not to, and what you rejected.

    Ten well-documented components beat forty undocumented ones in every portfolio review.

    Done when: A Figma library plus written usage documentation for every component.

  5. Case study writing

    Intermediate

    The portfolio piece itself. Hiring managers skim the pictures and read the reasoning.

    Build this

    One case study, on real constraints

    Take the problem you researched and the interface you designed and write it up properly: the constraint, what you tried, what the five users broke, what you changed, and what you would still fix.

    Include the version that failed. A case study with no dead ends reads as fiction, and reviewers know it.

    Done when: A published case study containing at least one documented failure and what it taught you.

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