Code typing · Kotlin · Single course

Type Kotlin without hunting for ?., ?:, { it }, and ->.

Your prose speed does not carry over to Kotlin. This course drills safe calls (?.), the elvis operator (?:), lambda braces with it, function arrows (->), and method references (::) inside real, working code until the symbols stop costing you a beat.

5 modules29 drills4 simulations~2.8 hrs$19 once
Try a free lesson

See the full syllabus and free preview lessons — every lesson title, module by module.

Lifetime access · first 2 lessons free · 30-day money-back guarantee

What you'll be able to do

  • Work through 33 Kotlin lessons across 5 modules (about 2.8 hours)
  • Type ?., ?:, { it }, and -> without looking down or backspacing
  • Produce Kotlin declarations, control flow, and function signatures as single motor patterns
  • Hit camelCase, snake_case, and PascalCase identifiers at the same speed as plain words
  • Hold accuracy on symbol-dense lines instead of falling into correction loops
  • Track your Kotlin speed and accuracy separately from your prose numbers

Also included in

Code: Kotlin comes free with 3 bigger packages

If you are likely to want more than one course, the ladder below is cheaper than buying them one at a time.

  • Complete Code Typing Pack$304 if bought separately$59

    16 courses · 528 lessons · 64 simulations · ~44.8 hrs

    Save $245 · 81%

    Only $40 more than Code: Kotlin on its own.

  • Complete Developer Interview Prep$333 if bought separately$69

    17 courses · 583 lessons · 69 simulations · ~50.3 hrs

    Save $264 · 79%

    Only $50 more than Code: Kotlin on its own.

  • All-Access Pass$1,476 if bought separately$99

    74 courses · 4,315 lessons · 99 simulations · ~375 hrs

    Save $1,377 · 93%

    Only $80 more than Code: Kotlin on its own.

Who it's for

This course is for

  • Android developers and backend teams that moved from Java to Kotlin
  • Bootcamp students and career switchers learning Kotlin syntax and typing it for the first time
  • Interview candidates facing live-coding rounds in Kotlin, where boilerplate eats thinking time
  • Fast prose typists whose Kotlin speed is a fraction of their English speed

Probably not for

  • Developers who never write Kotlin — pick the course for the language you actually use
  • Typists who have not learned touch typing on letters yet; start with the free beginner course
  • Polyglot engineers who want several languages — Complete Code Typing Pack is cheaper per course

How the course works

  1. 1

    Symbols first

    The Symbols & Operators module isolates ?., ?:, { it }, and -> so the keys that cause the most hesitation get drilled on their own.

  2. 2

    Then idioms

    Keywords & Idioms and Real Snippets move from single operators to the Kotlin patterns you type every day, all in working code.

  3. 3

    Then the clock

    Speed Runs and Assessment Simulations put the patterns under time pressure, which is where an untrained symbol key shows up.

Curriculum

5 modules · 29 drills · 4 simulations · ~2.8 hrs

33 lessons in 5 modules — Symbols & Operators, Keywords & Idioms, Real Snippets, Speed Runs, Assessment Simulations — roughly 2.8 hours. Every snippet is real Kotlin that works as written, so the patterns you drill are the ones you will type at work.

Code: Kotlin5 modules · 29 drills · 4 simulations · ~2.8 hrs
1

Symbols & Operators

7 lessons
Operators & SymbolsFree previewNull Safety: ?. and ?:Free preview
Lambdas & it
String Templates
Generics & Variance
Ranges & Progressions
Checkpoint: Symbol Fluency
2

Keywords & Idioms

7 lessons
Keywords
Declarations
Data Classes & copy
when & Sealed Hierarchies
Idiomatic Patterns
Collection Operators
Checkpoint: Keywords & Idioms
3

Real Snippets

8 lessons
Control Flow
Functions & Methods
Sealed Result Types
Exceptions & runCatching
Extension Functions
Realistic Snippet
Coroutines & Flow
Checkpoint: Real Snippets
4

Speed Runs

6 lessons
Speed Run: Config Loader
Speed Run: Collection Pipeline
Speed Run: State Machine
Speed Run: Builder DSL
Speed Run: Tests & Asserts
Checkpoint: Sustained Speed
5

Assessment Simulations

5 lessons
Assessment Sim 1: Cached Repository
Assessment Sim 2: Temperature Stats
Assessment Sim 3: RPN Calculator
Assessment Sim 4: Inventory Ledger
Checkpoint: Kotlin Mastery Final
View full course outline →

Why typing speed matters for code

Kotlin trades Java's boilerplate for operators — null safety alone puts question marks and colons on most lines.

Every backspace in an editor is a round trip: notice, stop, delete, retype. On symbol-dense lines that loop costs far more than the keystroke it saved, which is why accuracy beats raw speed here.

Each Kotlin drill is original code written to compile or run as authored, so your muscle memory learns correct syntax rather than typos.

30-day money-back guarantee

Try the free preview lessons first. If you buy and the course still is not right for you, email us within 30 days for a full refund — no questions asked. Payments are handled by Polar; refunds go back to your original payment method.

Frequently asked questions

I already type fast in English. Do I need a Kotlin course?

Probably. Kotlin trades Java's boilerplate for operators — null safety alone puts question marks and colons on most lines. Try the free preview lessons and compare the number to your prose speed — the gap is the part this course closes.

Should I get Complete Code Typing Pack instead?

If you write more than one language, yes. Complete Code Typing Pack covers all 16 language courses — $304 bought one at a time, $59 together, saving $245 (81%). If Kotlin is the only language you type all day, buy this course on its own.

Is the Kotlin code real?

Yes. Every drill is original Kotlin written to compile or run as authored, covering variables, functions, control flow, data structures, and the idioms specific to the language.

Can I try the Kotlin course before I buy?

Yes. The first 2 lessons of every paid course are free previews — sign in and start typing. If the drills feel right, one purchase unlocks the rest.

Does my progress save?

Yes. Lesson completions, speed and accuracy history, and your all-time best records are stored on your account, so you can pick up on any device where you left off.

Is the Kotlin course a one-time purchase?

Yes. You pay once and keep lifetime access. There is no recurring charge and nothing to cancel — the course stays in your library for as long as SureTyping exists.

Beginner courses are free for every keyboard layout. Start with the free lessons or get All-Access for $99.

Code: Kotlin

$19 · lifetime