diff --git a/package.json b/package.json
index 3cdacbf..3711554 100644
--- a/package.json
+++ b/package.json
@@ -47,9 +47,6 @@
     "backend",
     "library"
   ],
-  "engines": {
-    "node": ">=18.10.0"
-  },
   "scripts": {
     "prepare": "husky",
     "clean": "node scripts/rm.js lib",
diff --git a/src/index.ts b/src/index.ts
index 3a3b486..bdc2e58 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -1,3 +1,4 @@
 export * from "./config";
 export * from "./env";
+export * from "./interfaces";
 export * from "./utils";
diff --git a/src/interfaces/application-express.interface.ts b/src/interfaces/application-express.interface.ts
new file mode 100644
index 0000000..8a77bb1
--- /dev/null
+++ b/src/interfaces/application-express.interface.ts
@@ -0,0 +1,57 @@
+/* eslint-disable @typescript-eslint/no-namespace */
+import express from "express";
+import { Environment, IEnvironment } from "./environment.interface";
+import { IConsoleMessage } from "./console.interface";
+import { RenderEngine } from "./render/render.types";
+
+/**
+ * Namespace for the Server Application.
+ * @namespace Server
+ * @public API
+ */
+export namespace Server {
+  /**
+   * Interface for the WebServer application implementation.
+   */
+  export interface IWebServer {
+    initEnvironment(environment: Environment, options?: IEnvironment): void;
+
+    listen(port: number | string, appInfo?: IConsoleMessage): Promise<void>;
+
+    setEngine<T extends RenderEngine.EngineOptions>(
+      engine: RenderEngine.Engine,
+      options?: T,
+    ): Promise<void>;
+  }
+
+  /**
+   * Constructor type for IWebServer.
+   */
+  export interface IWebServerConstructor<T extends IWebServer> {
+    new (): T;
+  }
+
+  /**
+   * Public Interface for the WebServer application.
+   * @public API
+   */
+  export interface IWebServerPublic {
+    /**
+     * Start listening on the given port.
+     * @param port - The port number to listen on.
+     * @param consoleMessage - Optional App info message to display on startup.
+     */
+    listen(port: number | string, consoleMessage?: IConsoleMessage): Promise<void>;
+
+    /**
+     * Get the underlying HTTP server. (default: Express.js)
+     * @returns The underlying HTTP server after initialization.
+     * @public API
+     */
+    getHttpServer(): Promise<express.Application>;
+  }
+}
+
+export type IWebServer = Server.IWebServer;
+export type IWebServerConstructor<T extends IWebServer> = Server.IWebServerConstructor<T>;
+export type IWebServerPublic = Server.IWebServerPublic;
diff --git a/src/interfaces/console.interface.ts b/src/interfaces/console.interface.ts
new file mode 100644
index 0000000..bfd3e35
--- /dev/null
+++ b/src/interfaces/console.interface.ts
@@ -0,0 +1,8 @@
+/**
+ * Interface representing application message details for console output.
+ * @public API
+ */
+export interface IConsoleMessage {
+  appName: string;
+  appVersion: string;
+}
diff --git a/src/interfaces/environment.interface.ts b/src/interfaces/environment.interface.ts
new file mode 100644
index 0000000..980cfee
--- /dev/null
+++ b/src/interfaces/environment.interface.ts
@@ -0,0 +1,43 @@
+/* eslint-disable @typescript-eslint/no-namespace */
+
+/**
+ * The Environment namespace contains all the types and interfaces related to environment configuration.
+ * @namespace Environment
+ * @public API
+ */
+export namespace Env {
+  /**
+   * Enum representing possible server environments.
+   * @public API
+   */
+  export enum ServerEnvironment {
+    Development = "development",
+    Production = "production",
+    Remote = "remote",
+  }
+
+  /**
+   * Type representing possible server environments.
+   */
+  export type TypeServerEnvironment = "development" | "production" | "remote";
+
+  /**
+   * Interface for environment configuration options.
+   * @public API
+   */
+  export interface IEnvironment {
+    env: {
+      development?: string;
+      production?: string;
+    };
+  }
+
+  /**
+   * Type representing possible server environments.
+   * @public API
+   */
+  export type Environment = ServerEnvironment | TypeServerEnvironment | undefined;
+}
+
+export type Environment = Env.Environment;
+export type IEnvironment = Env.IEnvironment;
diff --git a/src/interfaces/index.ts b/src/interfaces/index.ts
new file mode 100644
index 0000000..befed99
--- /dev/null
+++ b/src/interfaces/index.ts
@@ -0,0 +1,10 @@
+export { RenderEngine } from "./render/render.types";
+export { IConsoleMessage } from "./console.interface";
+export { IExpressoMiddleware } from "./middleware.interface";
+export { Environment, IEnvironment, Env } from "./environment.interface";
+export {
+  IWebServer,
+  IWebServerConstructor,
+  IWebServerPublic,
+  Server,
+} from "./application-express.interface";
diff --git a/src/interfaces/middleware.interface.ts b/src/interfaces/middleware.interface.ts
new file mode 100644
index 0000000..6bf6683
--- /dev/null
+++ b/src/interfaces/middleware.interface.ts
@@ -0,0 +1,10 @@
+import { Request, Response, NextFunction } from 'express';
+
+/**
+ * ExpressoTS Class middleware interface.
+ */
+export interface IExpressoMiddleware {
+    //readonly name: string;
+    use(req: Request, res: Response, next: NextFunction): Promise<void> | void;
+  }
+  
\ No newline at end of file
diff --git a/src/interfaces/render/ejs.types.ts b/src/interfaces/render/ejs.types.ts
new file mode 100644
index 0000000..c5c5cb3
--- /dev/null
+++ b/src/interfaces/render/ejs.types.ts
@@ -0,0 +1,189 @@
+/* eslint-disable @typescript-eslint/no-explicit-any */
+
+/**
+ * An object where {@link filename} is the final parsed path or {@link template} is the content of the included template
+ */
+export type IncluderResult =
+  | { filename: string; template?: never }
+  | { template: string; filename?: never };
+
+/**
+ * @param originalPath the path as it appears in the include statement
+ * @param parsedPath the previously resolved path
+ *
+ * @return An {@link IncluderResult} object containing the filename or template data.
+ */
+type IncluderCallback = (originalPath: string, parsedPath: string) => IncluderResult;
+
+/**
+ * Escapes a string using HTML/XML escaping rules.
+ *
+ * Returns the empty string for `null` or `undefined`.
+ *
+ * @param markup Input string
+ * @return Escaped string
+ */
+type EscapeCallback = (markup?: any) => string;
+
+export interface Options {
+  /**
+   * Log the generated JavaScript source for the EJS template to the console.
+   *
+   * @default false
+   */
+  debug?: boolean | undefined;
+
+  /**
+   * Include additional runtime debugging information in generated template
+   * functions.
+   *
+   * @default true
+   */
+  compileDebug?: boolean | undefined;
+
+  /**
+   * Whether or not to use `with () {}` construct in the generated template
+   * functions. If set to `false`, data is still accessible through the object
+   * whose name is specified by `ejs.localsName` (defaults to `locals`).
+   *
+   * @default true
+   */
+  _with?: boolean | undefined;
+
+  /**
+   * Whether to run in strict mode or not.
+   * Enforces `_with=false`.
+   *
+   * @default false
+   */
+  strict?: boolean | undefined;
+
+  /**
+   * An array of local variables that are always destructured from `localsName`,
+   * available even in strict mode.
+   *
+   * @default []
+   */
+  destructuredLocals?: Array<string> | undefined;
+
+  /**
+   * Remove all safe-to-remove whitespace, including leading and trailing
+   * whitespace. It also enables a safer version of `-%>` line slurping for all
+   * scriptlet tags (it does not strip new lines of tags in the middle of a
+   * line).
+   *
+   * @default false
+   */
+  rmWhitespace?: boolean | undefined;
+
+  /**
+   * Whether or not to compile a `ClientFunction` that can be rendered
+   * in the browser without depending on ejs.js. Otherwise, a `TemplateFunction`
+   * will be compiled.
+   *
+   * @default false
+   */
+  client?: boolean | undefined;
+
+  /**
+   * The escaping function used with `<%=` construct. It is used in rendering
+   * and is `.toString()`ed in the generation of client functions.
+   *
+   * @default ejs.escapeXML
+   */
+  escape?: EscapeCallback | undefined;
+
+  /**
+   * The filename of the template. Required for inclusion and caching unless
+   * you are using `renderFile`. Also used for error reporting.
+   *
+   * @default undefined
+   */
+  filename?: string | undefined;
+
+  /**
+   * The path to templates root(s). When this is set, absolute paths for includes
+   * (/filename.ejs) will be relative to the templates root(s).
+   *
+   * @default undefined
+   */
+  root?: Array<string> | string | undefined;
+
+  /**
+   * The opening delimiter for all statements. This allows you to clearly delinate
+   * the difference between template code and existing delimiters. (It is recommended
+   * to synchronize this with the closeDelimiter property.)
+   *
+   * @default ejs.openDelimiter
+   */
+  openDelimiter?: string | undefined;
+
+  /**
+   * The closing delimiter for all statements. This allows to to clearly delinate
+   * the difference between template code and existing delimiters. (It is recommended
+   * to synchronize this with the openDelimiter property.)
+   *
+   * @default ejs.closeDelimiter
+   */
+  closeDelimiter?: string | undefined;
+
+  /**
+   * Character to use with angle brackets for open/close
+   * @default '%'
+   */
+  delimiter?: string | undefined;
+
+  /**
+   * Whether or not to enable caching of template functions. Beware that
+   * the options of compilation are not checked as being the same, so
+   * special handling is required if, for example, you want to cache client
+   * and regular functions of the same file.
+   *
+   * Requires `filename` to be set. Only works with rendering function.
+   *
+   * @default false
+   */
+  cache?: boolean | undefined;
+
+  /**
+   * The Object to which `this` is set during rendering.
+   *
+   * @default this
+   */
+  context?: any;
+
+  /**
+   * Whether or not to create an async function instead of a regular function.
+   * This requires language support.
+   *
+   * @default false
+   */
+  async?: boolean | undefined;
+
+  /**
+   * Make sure to set this to 'false' in order to skip UglifyJS parsing,
+   * when using ES6 features (`const`, etc) as UglifyJS doesn't understand them.
+   * @default true
+   */
+  beautify?: boolean | undefined;
+
+  /**
+   * Name to use for the object storing local variables when not using `with` or destructuring.
+   *
+   * @default ejs.localsName
+   */
+  localsName?: string | undefined;
+
+  /** Set to a string (e.g., 'echo' or 'print') for a function to print output inside scriptlet tags. */
+  outputFunctionName?: string | undefined;
+
+  /**
+   * An array of paths to use when resolving includes with relative paths
+   */
+  views?: Array<string> | undefined;
+
+  /**
+   * Custom function to handle EJS includes
+   */
+  includer?: IncluderCallback;
+}
diff --git a/src/interfaces/render/render.types.ts b/src/interfaces/render/render.types.ts
new file mode 100644
index 0000000..91218d9
--- /dev/null
+++ b/src/interfaces/render/render.types.ts
@@ -0,0 +1,78 @@
+/* eslint-disable @typescript-eslint/no-namespace */
+import { Options } from "./ejs.types";
+
+/**
+ * The Render namespace contains all the types and interfaces related to rendering views.
+ * @namespace Render
+ * @public API
+ */
+export namespace RenderEngine {
+  /**
+   * Ejs options
+   * @typedef {Object} EjsOptions
+   * @property {string | Array<string>} viewsDir - The path to the views folder
+   * @property {string} viewEngine - The view engine
+   * @property {ejs.Options} [serverOptions] - The server options
+   * @public API
+   */
+  export type EjsOptions = {
+    viewsDir?: string | Array<string>;
+    viewEngine?: string;
+    serverOptions?: Options;
+  };
+
+  /**
+   * Handlebars options
+   * @typedef {Object} HandlebarsOptions
+   * @property {string} viewsDir - The path to the views folder
+   * @property {string} viewEngine - The view engine to be used
+   * @property {ConfigOptions} [serverOptions] - The server options
+   * @public API
+   */
+  export type HandlebarsOptions = {
+    viewEngine?: string;
+    viewsDir?: string;
+    partialsDir?: string;
+  };
+
+  /**
+   * Pug options
+   * @typedef {Object} PugOptions
+   * @property {string} viewEngine - The view engine to be used
+   * @property {string} viewsDir - The path to the views folder
+   * @public API
+   */
+  export type PugOptions = {
+    viewEngine?: string;
+    viewsDir?: string;
+  };
+
+  /**
+   * The configuration options for the view engine.
+   * @typedef {HandlebarsOptions | EjsOptions | PugOptions} RenderOptions
+   * @public API
+   */
+  export type RenderOptions = {
+    engine: Engine;
+    options?: EngineOptions;
+  };
+
+  /**
+   * The supported view engines.
+   * @enum {string} Engine - The supported view engines.
+   * @readonly - This enum is read-only.
+   * @public API
+   */
+  export enum Engine {
+    HBS = "hbs",
+    EJS = "ejs",
+    PUG = "pug",
+  }
+
+  /**
+   * The configuration options for the view engine.
+   * @typedef {HandlebarsOptions | EjsOptions} EngineOptions
+   * @public API
+   */
+  export type EngineOptions = HandlebarsOptions | EjsOptions | PugOptions;
+}