Go SELF

Become a Go developer through practice. From "Hello World" to production-ready microservices with tests and CI/CD. 72 levels and 1000+ tasks with instant validation. Build REST APIs, work with concurrency, test and profile code — every task brings you closer to real work. The most direct path to a profession that pays 40% more.

Level 1
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First program in Go
Level 2
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Numbers, strings, and data input
Level 3
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Conditionals and logic
Level 4
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for loops
Level 5
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IDE installation and project setup
Level 6
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Variables, types, and formatting
Level 7
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Numbers, precision, and overflows
Level 8
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Constants, iota, and bitwise operations
Level 9
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Functions and returning errors
Level 10
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Packages and imports
Level 11
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Arrays and slices (len/cap, make/append)
Level 12
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Slices and memory ownership
Level 13
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Slice operations
Level 14
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Strings, bytes, runes, and UTF-8
Level 15
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Maps (map) and set pattern
Level 16
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Errors as values
Level 17
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Error wrapping (errors.Is/As)
Level 18
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defer, panic, and recover
Level 19
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Pointers and value semantics
Level 20
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Systematizing collections and errors
Level 21
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Structs and tags (struct tags)
Level 22
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Methods and receivers
Level 23
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Composition (embedding)
Level 24
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Interfaces and nil traps
Level 25
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Type assertions (type assertion)
Level 26
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io.Reader/Writer and context
Level 27
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Generics
Level 28
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Package architecture and dependency injection
Level 29
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Unit tests (table-driven)
Level 30
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Formatting and linters (gofmt, vet)
Level 31
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Advanced go test
Level 32
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Working with Git and GitHub
Level 33
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Debugging with Delve
Level 34
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Time and timeouts (time)
Level 35
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Go Modules (go.mod)
Level 36
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Documentation (godoc, README)
Level 37
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Clean code in Go
Level 38
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Quality rules and releases
Level 39
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Files, paths, and permissions
Level 40
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I/O streams (io, bufio)
Level 41
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File system (fs)
Level 42
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Reliable writing and backups
Level 43
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Testing file code
Level 44
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Embedding resources (embed)
Level 45
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JSON basics
Level 46
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Strict JSON and versioning
Level 47
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Working with CSV
Level 48
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CLI basics (flag)
Level 49
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Subcommands (FlagSet)
Level 50
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CLI UX (help, exit codes, environment)
Level 51
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Output formats and filtering
Level 52
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Logging (log/slog)
Level 53
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Testing CLI
Level 54
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Build and cross-compilation (ldflags)
Level 55
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Error standardization
Level 56
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HTTP and API design
Level 57
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URLs, query parameters, and filters
Level 58
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HTTP client
Level 59
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HTTP server and routing (ServeMux)
Level 60
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Routing patterns (Go 1.22+)
Level 61
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CRUD and validation
Level 62
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Middleware (authorization, limits, recover)
Level 63
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Graceful shutdown
Level 64
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Testing HTTP servers
Level 65
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Goroutines and WaitGroup
Level 66
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Channel basics (Channels)
Level 67
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select, timeouts, and goroutine leaks
Level 68
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Synchronization (sync, Mutex, atomic)
Level 69
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Worker pool
Level 70
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Advanced context
Level 71
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Race detector and benchmarks (pprof)
Level 72
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Course summary and further development
Level 73
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Final project