diff --git a/shatter-mobile/app/auth/callback.tsx b/shatter-mobile/app/auth/callback.tsx
index bcfd73f..d270f78 100644
--- a/shatter-mobile/app/auth/callback.tsx
+++ b/shatter-mobile/app/auth/callback.tsx
@@ -11,7 +11,7 @@ import { ActivityIndicator, Text, View } from "react-native";
 
 export default function AuthCallback() {
 	const { code } = useLocalSearchParams<{ code: string }>();
-	const { authenticate, authStorage } = useAuth();
+	const { authenticate } = useAuth();
 	const [error, setError] = useState("");
 
 	useEffect(() => {
@@ -28,11 +28,15 @@ export default function AuthCallback() {
 				// Fetch full user profile using returned userId + token
 				const userData = await userFetch(response.userId, response.token);
 
+				const existingSocialLinks = userData.user.socialLinks ?? {};
+				const linkedinUrl = existingSocialLinks.linkedin
+					?? `https://www.linkedin.com/in/${userData.user.name.toLowerCase().replace(/\s+/g, "-")}/`;
+
 				const user: User = {
 					_id: response.userId,
 					name: userData.user.name,
 					email: userData.user.email,
-					socialLinks: userData.user.socialLinks ?? {},
+					socialLinks: { ...existingSocialLinks, linkedin: linkedinUrl },
 					profilePhoto: userData.user.profilePhoto,
 					isGuest: false,
 				};
@@ -40,9 +44,8 @@ export default function AuthCallback() {
 				// Store user + JWT in auth context
 				await authenticate(user, response.token, false);
 
-				// Update stored user with LinkedIn data
-				const token = authStorage.accessToken;
-				userUpdate(response.userId, user, token);
+				// Persist LinkedIn URL to backend using the token from the exchange response
+				userUpdate(response.userId, user, response.token);
 				router.replace("/JoinEventPage");
 			} catch (err) {
 				setError((err as Error).message || "Authentication failed.");
diff --git a/shatter-mobile/src/components/login-signup/SignupForm.tsx b/shatter-mobile/src/components/login-signup/SignupForm.tsx
index fe9c5de..eec029d 100644
--- a/shatter-mobile/src/components/login-signup/SignupForm.tsx
+++ b/shatter-mobile/src/components/login-signup/SignupForm.tsx
@@ -1,6 +1,8 @@
 //called by Profile.tsx for signing up
 import { User } from "@/src/interfaces/User";
+import { SocialLinks } from "@/src/interfaces/User";
 import { userSignup, userUpdate } from "@/src/services/user.service";
+import { FontAwesome, Feather } from "@expo/vector-icons";
 import { router, Stack } from "expo-router";
 import * as WebBrowser from "expo-web-browser";
 import { useState } from "react";
@@ -18,6 +20,7 @@ import {
 import { SafeAreaView } from "react-native-safe-area-context";
 import { SignUpFormStyling as styles } from "../../styling/SignUpFormStyling.styles";
 import { useAuth } from "../context/AuthContext";
+import { colors } from "@/src/styling/constants";
 
 export default function SignUpForm() {
 	const { authenticate } = useAuth();
@@ -26,6 +29,10 @@ export default function SignUpForm() {
 	const [password, setPassword] = useState("");
 	const [loading, setLoading] = useState(false);
 	const [err, setError] = useState("");
+	const [selectedType, setSelectedType] = useState<"linkedin" | "github" | "other" | null>(null);
+	const [linkedin, setLinkedin] = useState("");
+	const [github, setGithub] = useState("");
+	const [other, setOther] = useState("");
 
 	const handleLinkedIn = async () => {
 		await WebBrowser.openBrowserAsync(
@@ -76,11 +83,16 @@ export default function SignUpForm() {
 				setError("User info could not be created. Please try again later.");
 			}
 
+			const socialLinks: SocialLinks = {};
+			if (linkedin.trim()) socialLinks.linkedin = linkedin.trim();
+			if (github.trim()) socialLinks.github = github.trim();
+			if (other.trim()) socialLinks.other = [{ label: "Contact Link", url: other.trim() }];
+
 			const user: User = {
 				_id: userResponse.userId,
 				name,
 				email,
-				socialLinks: {},
+				socialLinks,
 				profilePhoto: profilePhoto,
 				isGuest: false,
 			};
@@ -147,6 +159,52 @@ export default function SignUpForm() {
 									placeholderTextColor="#888"
 								/>
 
+								<Text style={styles.input && { color: colors.darkNavy, fontWeight: "600", fontSize: 14, marginBottom: 8 }}>Contact Link</Text>
+								<View style={{ flexDirection: "row", justifyContent: "space-between", marginBottom: 12 }}>
+									<TouchableOpacity
+										onPress={() => setSelectedType("linkedin")}
+										style={{ padding: 12, borderRadius: 12, backgroundColor: selectedType === "linkedin" ? "#0A66C2" : colors.lightGrey2, flex: 1, marginRight: 8, alignItems: "center" }}
+									>
+										<FontAwesome name="linkedin" size={22} color="white" />
+									</TouchableOpacity>
+									<TouchableOpacity
+										onPress={() => setSelectedType("github")}
+										style={{ padding: 12, borderRadius: 12, backgroundColor: selectedType === "github" ? "#24292e" : colors.lightGrey2, flex: 1, marginRight: 8, alignItems: "center" }}
+									>
+										<FontAwesome name="github" size={22} color="white" />
+									</TouchableOpacity>
+									<TouchableOpacity
+										onPress={() => setSelectedType("other")}
+										style={{ padding: 12, borderRadius: 12, backgroundColor: selectedType === "other" ? "#6c63ff" : colors.lightGrey2, flex: 1, alignItems: "center" }}
+									>
+										<Feather name="link" size={22} color="white" />
+									</TouchableOpacity>
+								</View>
+
+								{selectedType && (
+									<TextInput
+										style={styles.input}
+										placeholder={
+											selectedType === "linkedin" ? "LinkedIn URL"
+											: selectedType === "github" ? "GitHub URL"
+											: "Portfolio / Other URL"
+										}
+										placeholderTextColor="#888"
+										value={selectedType === "linkedin" ? linkedin : selectedType === "github" ? github : other}
+										onChangeText={(text) => {
+											if (selectedType === "linkedin") setLinkedin(text);
+											else if (selectedType === "github") setGithub(text);
+											else setOther(text);
+										}}
+										autoCapitalize="none"
+										keyboardType="url"
+									/>
+								)}
+
+								<Text style={{ color: "#888", fontSize: 13, fontStyle: "italic", marginBottom: 12 }}>
+									Select a platform above, then enter your profile link.
+								</Text>
+
 								<TouchableOpacity
 									style={[
 										styles.button,
diff --git a/shatter-mobile/src/services/linkedin_auth.service.ts b/shatter-mobile/src/services/linkedin_auth.service.ts
index 1bb6891..c9aaf94 100644
--- a/shatter-mobile/src/services/linkedin_auth.service.ts
+++ b/shatter-mobile/src/services/linkedin_auth.service.ts
@@ -1,5 +1,6 @@
 import * as Linking from "expo-linking";
 import * as WebBrowser from "expo-web-browser";
+import { Platform } from "react-native";
 import { User } from "../interfaces/User";
 import { exchangeLinkedInCode, userFetch } from "./user.service";
 
@@ -8,6 +9,11 @@ const REDIRECT_SCHEME = "shattermobile://auth";
 export async function loginWithLinkedIn(): Promise<
 	{ user: User; token: string } | null
 > {
+	if (Platform.OS === "web") {
+		window.location.href = `${process.env.EXPO_PUBLIC_API_BASE}/api/auth/linkedin`;
+		return null;
+	}
+
 	const result = await WebBrowser.openAuthSessionAsync(
 		`${process.env.EXPO_PUBLIC_API_BASE}/api/auth/linkedin?platform=mobile`,
 		REDIRECT_SCHEME,
diff --git a/shatter-mobile/src/styling/SignUpFormStyling.styles.ts b/shatter-mobile/src/styling/SignUpFormStyling.styles.ts
index 872ee9e..77545f6 100644
--- a/shatter-mobile/src/styling/SignUpFormStyling.styles.ts
+++ b/shatter-mobile/src/styling/SignUpFormStyling.styles.ts
@@ -11,7 +11,7 @@ export const SignUpFormStyling = StyleSheet.create({
 	background: {
 		flex: 1,
 		width: "100%",
-		height: "50%",
+		height: "100%",
 	},
 	safe: {
 		flex: 1,