diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 652b65d..a92adf7 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -9,21 +9,6 @@ on:
   pull_request:
 
 jobs:
-  check-modules:
-    runs-on: ubuntu-latest
-    steps:
-      - name: Checkout repository
-        uses: actions/checkout@v4
-      - name: Install Go(lang)
-        uses: actions/setup-go@v5
-        with:
-          go-version: 1.21.x
-      - name: Check module dependencies
-        run: |
-          go version
-          test -z "$(go mod tidy && git status go.* --porcelain)"
-          go mod verify
-
   run-unit-tests:
     runs-on: ubuntu-latest
     steps:
diff --git a/.github/workflows/linter.yml b/.github/workflows/linter.yml
new file mode 100644
index 0000000..b7f4360
--- /dev/null
+++ b/.github/workflows/linter.yml
@@ -0,0 +1,42 @@
+name: Lint
+
+on:
+  push:
+  pull_request:
+
+jobs:
+  check-modules:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout repository
+        uses: actions/checkout@v4
+      - name: Install Go(lang)
+        uses: actions/setup-go@v5
+        with:
+          go-version: 1.21.x
+      - name: Check module dependencies
+        run: |
+          go version
+          test -z "$(go mod tidy && git status go.* --porcelain)"
+          go mod verify
+
+  lint:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+        with:
+          fetch-depth: 0
+      - name: Install Go
+        uses: actions/setup-go@v5
+        with:
+          go-version: 1.21.x
+      - name: Retrieve golangci-lint version
+        run: |
+          echo "Version=$(head -n 1 "${GITHUB_WORKSPACE}/.golangci.yml" | tr -d '# ')" >> $GITHUB_OUTPUT
+        id: version
+      - name: golangci-lint
+        uses: golangci/golangci-lint-action@v3
+        with:
+          version: ${{ steps.version.outputs.Version }}
+          only-new-issues: true
diff --git a/.golangci.yml b/.golangci.yml
new file mode 100644
index 0000000..b51eb56
--- /dev/null
+++ b/.golangci.yml
@@ -0,0 +1,95 @@
+# v1.55.2
+# Please don't remove the first line. It is used in CI to determine the golangci-lint version.
+run:
+  timeout: 5m
+
+issues:
+  exclude-rules:
+    - path: _(test|gen)\.go
+      linters:
+        - cyclop
+        - dupl
+        - gocognit
+        - funlen
+        - lll
+    - path: (cmd|env|migrations)\/
+      linters:
+        - gochecknoglobals
+
+linters-settings:
+  govet:
+    check-shadowing: true
+  funlen:
+    lines: 80
+    statements: 60
+  forbidigo:
+    forbid:
+      - '^(fmt\\.Print(|f|ln)|print|println)$'
+
+linters:
+  disable-all: true
+  enable:
+    - asasalint
+    - asciicheck
+    - bidichk
+    - bodyclose
+    - contextcheck
+    - cyclop
+    - dogsled
+    - dupl
+    - durationcheck
+    - errcheck
+    - errchkjson
+    - errname
+    - errorlint
+    - exhaustive
+    - exportloopref
+    - forbidigo
+    - forcetypeassert
+    - funlen
+    - gocheckcompilerdirectives
+    - gochecknoglobals
+    - gocognit
+    - goconst
+    - gocritic
+    - gofmt
+    - gofumpt
+    - goimports
+    - gomoddirectives
+    - goprintffuncname
+    - gosec
+    - gosimple
+    - govet
+    - importas
+    - ineffassign
+    - interfacebloat
+    - lll
+    - makezero
+    - misspell
+    - nakedret
+    - nestif
+    - nilerr
+    - nilnil
+    - noctx
+    - nolintlint
+    - nosprintfhostport
+    - paralleltest
+    - prealloc
+    - predeclared
+    - promlinter
+    - revive
+    - reassign
+    - rowserrcheck
+    - sqlclosecheck
+    - staticcheck
+    - stylecheck
+    - tenv
+    - tparallel
+    - typecheck
+    - unconvert
+    - unparam
+    - unused
+    - usestdlibvars
+    - wastedassign
+    - whitespace
+  fast: false
diff --git a/api/api.go b/api/api.go
index 1430056..e603525 100644
--- a/api/api.go
+++ b/api/api.go
@@ -9,6 +9,8 @@ import (
 	"strings"
 	"time"
 
+	"github.com/pkg/errors"
+
 	"github.com/google/uuid"
 	"github.com/gorilla/mux"
 	"github.com/sirupsen/logrus"
@@ -69,6 +71,7 @@ func (a *API) handler(f func(*app.Context, http.ResponseWriter, *http.Request) e
 		ctx := a.App.NewContext().WithRemoteAddress(a.addressForRequest(r)).WithTraceID(traceID)
 
 		defer func() {
+			//nolint: forcetypeassert
 			statusCode := w.(*statusCodeRecorder).StatusCode
 			if statusCode == 0 {
 				statusCode = 200
@@ -93,29 +96,15 @@ func (a *API) handler(f func(*app.Context, http.ResponseWriter, *http.Request) e
 		w.Header().Set("Content-Type", "application/json")
 
 		if err := f(ctx, w, r); err != nil {
-			if verr, ok := err.(*app.ValidationError); ok {
-				data, err := json.Marshal(verr)
-				if err == nil {
-					w.WriteHeader(http.StatusBadRequest)
-					_, err = w.Write(data)
-				}
-
-				if err != nil {
-					ctx.Logger.Error(err)
-					http.Error(w, "internal server error", http.StatusInternalServerError)
-				}
-			} else if uerr, ok := err.(*app.UserError); ok {
-				data, err := json.Marshal(uerr)
-				if err == nil {
-					w.WriteHeader(uerr.StatusCode)
-					_, err = w.Write(data)
-				}
-
-				if err != nil {
-					ctx.Logger.Error(err)
-					http.Error(w, "internal server error", http.StatusInternalServerError)
-				}
-			} else {
+			var verr *app.ValidationError
+			var uerr *app.UserError
+
+			switch {
+			case errors.As(err, &verr):
+				handleValidationError(ctx, w, verr)
+			case errors.As(err, &uerr):
+				handleUserError(ctx, w, uerr)
+			default:
 				ctx.Logger.Error(err)
 				http.Error(w, "internal server error", http.StatusInternalServerError)
 			}
@@ -123,6 +112,32 @@ func (a *API) handler(f func(*app.Context, http.ResponseWriter, *http.Request) e
 	})
 }
 
+func handleValidationError(ctx *app.Context, w http.ResponseWriter, verr *app.ValidationError) {
+	data, err := json.Marshal(verr)
+	if err == nil {
+		w.WriteHeader(http.StatusBadRequest)
+		_, err = w.Write(data)
+	}
+
+	if err != nil {
+		ctx.Logger.Error(err)
+		http.Error(w, "internal server error", http.StatusInternalServerError)
+	}
+}
+
+func handleUserError(ctx *app.Context, w http.ResponseWriter, uerr *app.UserError) {
+	data, err := json.Marshal(uerr)
+	if err == nil {
+		w.WriteHeader(uerr.StatusCode)
+		_, err = w.Write(data)
+	}
+
+	if err != nil {
+		ctx.Logger.Error(err)
+		http.Error(w, "internal server error", http.StatusInternalServerError)
+	}
+}
+
 func (a *API) helloHandler(ctx *app.Context, w http.ResponseWriter, _ *http.Request) error {
 	_, err := w.Write([]byte(
 		fmt.Sprintf(`{"hello":"world","remote_address":%q,"trace_id":%q}`,
diff --git a/api/place.go b/api/place.go
index 6ca94aa..cd87c48 100644
--- a/api/place.go
+++ b/api/place.go
@@ -50,7 +50,7 @@ func (a *API) createPlace(ctx *app.Context, w http.ResponseWriter, r *http.Reque
 		return err
 	}
 
-	if err := json.Unmarshal(body, &input); err != nil {
+	if err = json.Unmarshal(body, &input); err != nil {
 		return err
 	}
 
@@ -61,7 +61,7 @@ func (a *API) createPlace(ctx *app.Context, w http.ResponseWriter, r *http.Reque
 		Longitude:   input.Longitude,
 	}
 
-	if err := ctx.CreatePlace(place); err != nil {
+	if err = ctx.CreatePlace(place); err != nil {
 		return err
 	}
 
@@ -110,7 +110,7 @@ func (a *API) updatePlaceByID(ctx *app.Context, w http.ResponseWriter, r *http.R
 		return err
 	}
 
-	if err := json.Unmarshal(body, &input); err != nil {
+	if err = json.Unmarshal(body, &input); err != nil {
 		return err
 	}
 
diff --git a/cmd/serve.go b/cmd/serve.go
index b5b21cf..2aa09b7 100644
--- a/cmd/serve.go
+++ b/cmd/serve.go
@@ -36,6 +36,7 @@ func serveAPI(ctx context.Context, api *api.API) {
 	done := make(chan struct{})
 	go func() {
 		<-ctx.Done()
+		//nolint:contextcheck
 		if err := s.Shutdown(context.Background()); err != nil {
 			logrus.Error(err)
 		}