diff --git a/Gemfile b/Gemfile
index 2df9ea4a..3df8c9bf 100644
--- a/Gemfile
+++ b/Gemfile
@@ -32,6 +32,7 @@ gem "bcrypt", "~> 3.1.7"
 
 # Reduces boot times through caching; required in config/boot.rb
 gem "bootsnap", ">= 1.4.4", require: false
+gem "sidekiq"
 
 group :development, :test do
   gem "byebug", platforms: %i[mri mingw x64_mingw]
@@ -49,6 +50,7 @@ group :development do
   gem "web-console", ">= 4.1.0"
   # Display performance information such as SQL time and flame graphs for each request in your browser.
   # Can be configured to work on production as well see: https://github.com/MiniProfiler/rack-mini-profiler/blob/master/README.md
+  gem "letter_opener"
   gem "listen", "~> 3.3"
   gem "rack-mini-profiler", "~> 2.0"
   # Spring speeds up development by keeping your application running in the background. Read more: https://github.com/rails/spring
diff --git a/Gemfile.lock b/Gemfile.lock
index d49ce45b..7d4de491 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -83,6 +83,7 @@ GEM
       xpath (~> 3.2)
     coderay (1.1.3)
     concurrent-ruby (1.2.2)
+    connection_pool (2.4.1)
     crass (1.0.6)
     date (3.3.3)
     enumerize (2.7.0)
@@ -111,6 +112,10 @@ GEM
       kaminari-core (= 1.2.2)
     kaminari-core (1.2.2)
     language_server-protocol (3.17.0.3)
+    launchy (2.5.2)
+      addressable (~> 2.8)
+    letter_opener (1.8.1)
+      launchy (>= 2.2, < 3)
     listen (3.8.0)
       rb-fsevent (~> 0.10, >= 0.10.3)
       rb-inotify (~> 0.9, >= 0.9.10)
@@ -194,6 +199,8 @@ GEM
     rb-fsevent (0.11.2)
     rb-inotify (0.10.1)
       ffi (~> 1.0)
+    redis-client (0.18.0)
+      connection_pool
     regexp_parser (2.8.1)
     rexml (3.2.6)
     rubocop (1.56.4)
@@ -243,6 +250,11 @@ GEM
       rubyzip (>= 1.2.2, < 3.0)
       websocket (~> 1.0)
     semantic_range (3.0.0)
+    sidekiq (7.1.6)
+      concurrent-ruby (< 2)
+      connection_pool (>= 2.3.0)
+      rack (>= 2.2.4)
+      redis-client (>= 0.14.0)
     spring (4.1.1)
     sprockets (4.2.1)
       concurrent-ruby (~> 1.0)
@@ -295,6 +307,7 @@ DEPENDENCIES
   interactor (~> 3.0)
   jbuilder (~> 2.7)
   kaminari
+  letter_opener
   listen (~> 3.3)
   pg (~> 1.1)
   pry
@@ -310,6 +323,7 @@ DEPENDENCIES
   rubocop-thread_safety
   sass-rails (>= 6)
   selenium-webdriver (>= 4.0.0.rc1)
+  sidekiq
   spring
   turbolinks (~> 5)
   tzinfo-data
diff --git a/app/interactors/projects/create.rb b/app/interactors/projects/create.rb
index 6a70d45e..af65b269 100644
--- a/app/interactors/projects/create.rb
+++ b/app/interactors/projects/create.rb
@@ -2,7 +2,14 @@ module Projects
   class Create
     include Interactor::Organizer
 
+    delegate :project, :user, to: :context
+
     organize Projects::Save,
              Projects::Create::CreateOwner
+
+    after do
+      ProjectMailer.project_created(project, user).deliver_later
+      Projects::CreateDefaultTasksJob.perform_async(project.id)
+    end
   end
 end
diff --git a/app/jobs/projects/create_default_tasks_job.rb b/app/jobs/projects/create_default_tasks_job.rb
new file mode 100644
index 00000000..0a28c72c
--- /dev/null
+++ b/app/jobs/projects/create_default_tasks_job.rb
@@ -0,0 +1,17 @@
+module Projects
+  class CreateDefaultTasksJob
+    include Sidekiq::Worker
+
+    sidekiq_options queue: :default, retry: 3
+
+    def perform(project_id)
+      project = Project.find(project_id)
+
+      project.tasks.create(
+        [
+          { name: "Your first task", status: :unstarted, deadline_at: 1.week.from_now }
+        ]
+      )
+    end
+  end
+end
diff --git a/app/mailers/project_mailer.rb b/app/mailers/project_mailer.rb
new file mode 100644
index 00000000..c84e50e7
--- /dev/null
+++ b/app/mailers/project_mailer.rb
@@ -0,0 +1,7 @@
+class ProjectMailer < ApplicationMailer
+  def project_created(project, user)
+    @project = project
+
+    mail(to: user.email)
+  end
+end
diff --git a/app/views/project_mailer/project_created.html.erb b/app/views/project_mailer/project_created.html.erb
new file mode 100644
index 00000000..61e11ba6
--- /dev/null
+++ b/app/views/project_mailer/project_created.html.erb
@@ -0,0 +1,2 @@
+<h1>New project created.</h1>
+<p>Congratulations! You have become the owner of a new project -- "<%= @project.name %>"!</p>
diff --git a/app/views/project_mailer/project_created.txt.erb b/app/views/project_mailer/project_created.txt.erb
new file mode 100644
index 00000000..1f1059e6
--- /dev/null
+++ b/app/views/project_mailer/project_created.txt.erb
@@ -0,0 +1 @@
+Congratulations! You have become the owner of a new project -- "<%= @project.name %>"!
diff --git a/config/environments/development.rb b/config/environments/development.rb
index 0a5aa39c..39fa73fc 100644
--- a/config/environments/development.rb
+++ b/config/environments/development.rb
@@ -1,6 +1,6 @@
 require "active_support/core_ext/integer/time"
 
-Rails.application.configure do
+Rails.application.configure do # rubocop:disable Metrics/BlockLength
   # Settings specified here will take precedence over those in config/application.rb.
 
   # In the development environment your application's code is reloaded any time
@@ -73,4 +73,8 @@
 
   # Uncomment if you wish to allow Action Cable access from any origin.
   # config.action_cable.disable_request_forgery_protection = true
+
+  config.action_mailer.delivery_method = :letter_opener
+  config.action_mailer.perform_deliveries = true
+  config.active_job.queue_adapter = :sidekiq
 end
diff --git a/config/routes.rb b/config/routes.rb
index ed05b960..863b13eb 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -1,4 +1,8 @@
+require "sidekiq/web"
+
 Rails.application.routes.draw do
+  mount Sidekiq::Web => "/sidekiq"
+
   root "projects#index"
   get "login", to: "sessions#new", as: :login
   post "login", to: "sessions#create"