diff --git a/packages/nextjs/app/api/submissions/route.ts b/packages/nextjs/app/api/submissions/route.ts
index 20d91d4..7672e06 100644
--- a/packages/nextjs/app/api/submissions/route.ts
+++ b/packages/nextjs/app/api/submissions/route.ts
@@ -1,5 +1,9 @@
 import { NextResponse } from "next/server";
-import { getAllSubmissions } from "~~/services/database/repositories/submissions";
+import { recoverTypedDataAddress } from "viem";
+import { createBuilder, getBuilderById } from "~~/services/database/repositories/builders";
+import { createSubmission, getAllSubmissions } from "~~/services/database/repositories/submissions";
+import { SubmissionInsert } from "~~/services/database/repositories/submissions";
+import { EIP_712_DOMAIN, EIP_712_TYPES__SUBMISSION } from "~~/utils/eip712";
 
 export async function GET() {
   try {
@@ -10,3 +14,53 @@ export async function GET() {
     return NextResponse.json({ error: "Error fetching submissions" }, { status: 500 });
   }
 }
+
+export type CreateNewSubmissionBody = SubmissionInsert & { signature: `0x${string}`; signer: string };
+
+export async function POST(req: Request) {
+  try {
+    const { title, description, linkToRepository, signature, signer } = (await req.json()) as CreateNewSubmissionBody;
+
+    if (
+      !title ||
+      !description ||
+      !linkToRepository ||
+      !signature ||
+      !signer ||
+      description.length > 750 ||
+      title.length > 75
+    ) {
+      return NextResponse.json({ error: "Invalid form details submitted" }, { status: 400 });
+    }
+
+    const recoveredAddress = await recoverTypedDataAddress({
+      domain: EIP_712_DOMAIN,
+      types: EIP_712_TYPES__SUBMISSION,
+      primaryType: "Message",
+      message: { title, description, linkToRepository },
+      signature: signature,
+    });
+
+    if (recoveredAddress !== signer) {
+      return NextResponse.json({ error: "Recovered address did not match signer" }, { status: 401 });
+    }
+
+    const builder = await getBuilderById(signer);
+
+    if (!builder) {
+      await createBuilder({ id: signer, role: "user" });
+    }
+
+    const submission = await createSubmission({
+      title: title,
+      description: description,
+      linkToRepository: linkToRepository,
+      builder: signer,
+    });
+
+    return NextResponse.json({ submission }, { status: 201 });
+  } catch (e) {
+    console.error(e);
+    return NextResponse.json({ error: "Error processing form" }, { status: 500 });
+  }
+}
diff --git a/packages/nextjs/app/submit/_component/Form.tsx b/packages/nextjs/app/submit/_component/Form.tsx
new file mode 100644
index 0000000..e280f0a
--- /dev/null
+++ b/packages/nextjs/app/submit/_component/Form.tsx
@@ -0,0 +1,116 @@
+"use client";
+
+import React, { useState } from "react";
+import { useRouter } from "next/navigation";
+import SubmitButton from "./SubmitButton";
+import { useMutation } from "@tanstack/react-query";
+import { useAccount, useSignTypedData } from "wagmi";
+import { CreateNewSubmissionBody } from "~~/app/api/submissions/route";
+import { EIP_712_DOMAIN, EIP_712_TYPES__SUBMISSION } from "~~/utils/eip712";
+import { postMutationFetcher } from "~~/utils/react-query";
+import { notification } from "~~/utils/scaffold-eth";
+
+const MAX_DESCRIPTION_LENGTH = 750;
+
+const Form = () => {
+  const { address: connectedAddress } = useAccount();
+  const [descriptionLength, setDescriptionLength] = useState(0);
+  const { signTypedDataAsync } = useSignTypedData();
+  const router = useRouter();
+  const { mutateAsync: postNewSubmission } = useMutation({
+    mutationFn: (newSubmission: CreateNewSubmissionBody) =>
+      postMutationFetcher("/api/submissions", { body: newSubmission }),
+  });
+
+  const clientFormAction = async (formData: FormData) => {
+    if (!connectedAddress) {
+      notification.error("Please connect your wallet");
+      return;
+    }
+
+    try {
+      const title = formData.get("title") as string;
+      const description = formData.get("description") as string;
+      const linkToRepository = formData.get("linkToRepository") as string;
+      if (!title || !description || !linkToRepository) {
+        notification.error("Please fill all the fields");
+        return;
+      }
+
+      const signature = await signTypedDataAsync({
+        domain: EIP_712_DOMAIN,
+        types: EIP_712_TYPES__SUBMISSION,
+        primaryType: "Message",
+        message: {
+          title: title,
+          description: description,
+          linkToRepository: linkToRepository,
+        },
+      });
+
+      await postNewSubmission({ title, description, linkToRepository, signature, signer: connectedAddress });
+
+      notification.success("Extension submitted successfully!");
+      router.push("/");
+    } catch (error: any) {
+      if (error instanceof Error) {
+        notification.error(error.message);
+        return;
+      }
+      notification.error("Something went wrong");
+    }
+  };
+
+  return (
+    <div className="card card-compact rounded-xl max-w-[95%] w-[500px] bg-secondary shadow-lg mb-12">
+      <form action={clientFormAction} className="card-body space-y-3">
+        <h2 className="card-title self-center text-3xl !mb-0">Submit Extension</h2>
+        <div className="space-y-2">
+          <p className="m-0 text-xl ml-2">Title</p>
+          <div className="flex border-2 border-base-300 bg-base-200 rounded-xl text-accent">
+            <input
+              className="input input-ghost focus-within:border-transparent focus:outline-none focus:bg-transparent focus:text-gray-400 h-[2.2rem] min-h-[2.2rem] px-4 border w-full font-medium placeholder:text-accent/50 text-gray-400"
+              placeholder="Extension title"
+              name="title"
+              autoComplete="off"
+              type="text"
+              maxLength={75}
+            />
+          </div>
+        </div>
+        <div className="space-y-2">
+          <p className="m-0 text-xl ml-2">Description</p>
+          <div className="flex flex-col border-2 border-base-300 bg-base-200 rounded-xl text-accent">
+            <textarea
+              className="input input-ghost focus-within:border-transparent focus:outline-none focus:bg-transparent focus:text-gray-400 px-4 pt-2 border w-full font-medium placeholder:text-accent/50 text-gray-400 h-28 md:h-52 rounded-none"
+              placeholder="Extension description"
+              name="description"
+              autoComplete="off"
+              maxLength={MAX_DESCRIPTION_LENGTH}
+              onChange={e => setDescriptionLength(e.target.value.length)}
+            />
+            <p className="my-1">
+              {descriptionLength} / {MAX_DESCRIPTION_LENGTH}
+            </p>
+          </div>
+        </div>
+        <div className="space-y-2">
+          <p className="m-0 text-xl ml-2">Repository URL</p>
+          <div className="flex border-2 border-base-300 bg-base-200 rounded-xl text-accent">
+            <input
+              className="input input-ghost focus-within:border-transparent focus:outline-none focus:bg-transparent focus:text-gray-400 h-[2.2rem] min-h-[2.2rem] px-4 border w-full font-medium placeholder:text-accent/50 text-gray-400"
+              placeholder="https://"
+              name="linkToRepository"
+              autoComplete="off"
+              type="text"
+              maxLength={75}
+            />
+          </div>
+        </div>
+        <SubmitButton />
+      </form>
+    </div>
+  );
+};
+
+export default Form;
diff --git a/packages/nextjs/app/submit/_component/SubmitButton.tsx b/packages/nextjs/app/submit/_component/SubmitButton.tsx
new file mode 100644
index 0000000..89aca5a
--- /dev/null
+++ b/packages/nextjs/app/submit/_component/SubmitButton.tsx
@@ -0,0 +1,28 @@
+"use client";
+
+import { useFormStatus } from "react-dom";
+import { useAccount } from "wagmi";
+import { RainbowKitCustomConnectButton } from "~~/components/scaffold-eth";
+
+// To use useFormStatus we need to make sure button is child of form
+const SubmitButton = () => {
+  const { pending } = useFormStatus();
+  const { isConnected } = useAccount();
+
+  return (
+    <div
+      className={`flex ${!isConnected && "tooltip tooltip-bottom"}`}
+      data-tip={`${!isConnected ? "Please connect your wallet" : ""}`}
+    >
+      {isConnected ? (
+        <button className="btn btn-primary w-full" disabled={pending} aria-disabled={pending}>
+          Submit
+        </button>
+      ) : (
+        <RainbowKitCustomConnectButton fullWidth={true} />
+      )}
+    </div>
+  );
+};
+
+export default SubmitButton;
diff --git a/packages/nextjs/app/submit/page.tsx b/packages/nextjs/app/submit/page.tsx
new file mode 100644
index 0000000..d2806ba
--- /dev/null
+++ b/packages/nextjs/app/submit/page.tsx
@@ -0,0 +1,14 @@
+import Form from "./_component/Form";
+import { NextPage } from "next";
+
+const Submit: NextPage = () => {
+  return (
+    <div className="flex bg-base-100 items-center flex-col flex-grow text-center pt-10 md:pt-4 px-6">
+      <h1 className="text-3xl sm:text-4xl font-bold mb-4">Submit Extension</h1>
+      <p className="text-md mb-0 max-w-xl">Submit your SE-2 extension.</p>
+      <Form />
+    </div>
+  );
+};
+
+export default Submit;
diff --git a/packages/nextjs/components/Header.tsx b/packages/nextjs/components/Header.tsx
index f24a1de..5b0355b 100644
--- a/packages/nextjs/components/Header.tsx
+++ b/packages/nextjs/components/Header.tsx
@@ -19,6 +19,10 @@ export const menuLinks: HeaderMenuLink[] = [
     label: "Home",
     href: "/",
   },
+  {
+    label: "Submit",
+    href: "/submit",
+  },
   {
     label: "Debug Contracts",
     href: "/debug",
diff --git a/packages/nextjs/components/scaffold-eth/RainbowKitCustomConnectButton/index.tsx b/packages/nextjs/components/scaffold-eth/RainbowKitCustomConnectButton/index.tsx
index 6521200..aec40a9 100644
--- a/packages/nextjs/components/scaffold-eth/RainbowKitCustomConnectButton/index.tsx
+++ b/packages/nextjs/components/scaffold-eth/RainbowKitCustomConnectButton/index.tsx
@@ -14,7 +14,7 @@ import { getBlockExplorerAddressLink } from "~~/utils/scaffold-eth";
 /**
  * Custom Wagmi Connect Button (watch balance + custom design)
  */
-export const RainbowKitCustomConnectButton = () => {
+export const RainbowKitCustomConnectButton = ({ fullWidth }: { fullWidth?: boolean }) => {
   const networkColor = useNetworkColor();
   const { targetNetwork } = useTargetNetwork();
 
@@ -31,7 +31,11 @@ export const RainbowKitCustomConnectButton = () => {
             {(() => {
               if (!connected) {
                 return (
-                  <button className="btn btn-primary btn-sm" onClick={openConnectModal} type="button">
+                  <button
+                    className={`btn btn-primary btn-sm${fullWidth ? " w-full" : ""}`}
+                    onClick={openConnectModal}
+                    type="button"
+                  >
                     Connect Wallet
                   </button>
                 );
diff --git a/packages/nextjs/package.json b/packages/nextjs/package.json
index 8ddcf07..5f4ebe8 100644
--- a/packages/nextjs/package.json
+++ b/packages/nextjs/package.json
@@ -48,6 +48,7 @@
     "@types/pg": "^8",
     "@types/react": "^18.0.21",
     "@types/react-copy-to-clipboard": "^5.0.4",
+    "@types/react-dom": "^18.2.18",
     "@typescript-eslint/eslint-plugin": "~5.40.0",
     "abitype": "1.0.5",
     "autoprefixer": "~10.4.12",
diff --git a/packages/nextjs/services/database/config/schema.ts b/packages/nextjs/services/database/config/schema.ts
index 6f09d96..9952997 100644
--- a/packages/nextjs/services/database/config/schema.ts
+++ b/packages/nextjs/services/database/config/schema.ts
@@ -6,6 +6,7 @@ export const submissions = pgTable("submissions", {
   id: serial("id").primaryKey(),
   title: varchar("name", { length: 256 }),
   description: text("description"),
+  linkToRepository: varchar("link_to_repository", { length: 256 }),
   submissionTimestamp: timestamp("submission_timestamp").default(sql`now()`),
   builder: varchar("builder_id", { length: 256 }).references(() => builders.id),
 });
diff --git a/packages/nextjs/services/database/repositories/builders.ts b/packages/nextjs/services/database/repositories/builders.ts
new file mode 100644
index 0000000..ad7bc2c
--- /dev/null
+++ b/packages/nextjs/services/database/repositories/builders.ts
@@ -0,0 +1,17 @@
+import { InferInsertModel, eq } from "drizzle-orm";
+import { db } from "~~/services/database/config/postgresClient";
+import { builders } from "~~/services/database/config/schema";
+
+export type BuilderInsert = InferInsertModel<typeof builders>;
+
+export async function getAllBuilders() {
+  return await db.select().from(builders);
+}
+
+export async function getBuilderById(id: string) {
+  return await db.query.builders.findFirst({ where: eq(builders.id, id) });
+}
+
+export async function createBuilder(builder: BuilderInsert) {
+  return await db.insert(builders).values(builder);
+}
diff --git a/packages/nextjs/services/database/seed.ts b/packages/nextjs/services/database/seed.ts
index c8707e3..15a7d68 100644
--- a/packages/nextjs/services/database/seed.ts
+++ b/packages/nextjs/services/database/seed.ts
@@ -31,11 +31,13 @@ async function seed() {
       {
         title: "First submission",
         description: "This is the first submission",
+        linkToRepository: "https://github.com/BuidlGuidl/grants.buidlguidl.com",
         builder: "0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266",
       },
       {
         title: "Second submission",
         description: "This is the second submission",
+        linkToRepository: "https://github.com/BuidlGuidl/extensions-hackathon",
         builder: "0xf39Fd6e51aad88F6F4ce6aB8827279cffFb92266",
       },
     ])
diff --git a/packages/nextjs/utils/eip712.ts b/packages/nextjs/utils/eip712.ts
new file mode 100644
index 0000000..b96d84f
--- /dev/null
+++ b/packages/nextjs/utils/eip712.ts
@@ -0,0 +1,12 @@
+export const EIP_712_DOMAIN = {
+  name: "Scaffold-ETH 2 Extensions Hackathon",
+  version: "1",
+} as const;
+
+export const EIP_712_TYPES__SUBMISSION = {
+  Message: [
+    { name: "title", type: "string" },
+    { name: "description", type: "string" },
+    { name: "linkToRepository", type: "string" },
+  ],
+} as const;
diff --git a/packages/nextjs/utils/react-query.ts b/packages/nextjs/utils/react-query.ts
new file mode 100644
index 0000000..32982f8
--- /dev/null
+++ b/packages/nextjs/utils/react-query.ts
@@ -0,0 +1,30 @@
+export const fetcher = async <T = Record<any, any>>(...args: Parameters<typeof fetch>) => {
+  const res = await fetch(...args);
+  const data = await res.json();
+  if (!res.ok) {
+    throw new Error(data.error || "Error fetching data");
+  }
+  return data as T;
+};
+
+export const makeMutationFetcher =
+  <T = Record<any, any>>(method: "POST" | "PUT" | "PATCH" | "DELETE") =>
+  async (url: string, { body }: { body: T }) => {
+    const res = await fetch(url, {
+      method: method,
+      body: JSON.stringify(body),
+    });
+
+    const data = await res.json();
+
+    if (!res.ok) {
+      throw new Error(data.error || `Error ${method.toLowerCase()}ing data`);
+    }
+    return data;
+  };
+
+export const postMutationFetcher = <T = Record<any, any>>(url: string, arg: { body: T }) =>
+  makeMutationFetcher<T>("POST")(url, arg);
+
+export const patchMutationFetcher = <T = Record<any, any>>(url: string, arg: { body: T }) =>
+  makeMutationFetcher<T>("PATCH")(url, arg);
diff --git a/yarn.lock b/yarn.lock
index 3165802..7e4b0b9 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -2629,6 +2629,7 @@ __metadata:
     "@types/pg": ^8
     "@types/react": ^18.0.21
     "@types/react-copy-to-clipboard": ^5.0.4
+    "@types/react-dom": ^18.2.18
     "@typescript-eslint/eslint-plugin": ~5.40.0
     "@uniswap/sdk-core": ~4.0.1
     "@uniswap/v2-sdk": ~3.0.1
@@ -3336,6 +3337,15 @@ __metadata:
   languageName: node
   linkType: hard
 
+"@types/react-dom@npm:^18.2.18":
+  version: 18.3.0
+  resolution: "@types/react-dom@npm:18.3.0"
+  dependencies:
+    "@types/react": "*"
+  checksum: a0cd9b1b815a6abd2a367a9eabdd8df8dd8f13f95897b2f9e1359ea3ac6619f957c1432ece004af7d95e2a7caddbba19faa045f831f32d6263483fc5404a7596
+  languageName: node
+  linkType: hard
+
 "@types/react@npm:*, @types/react@npm:^18.0.21":
   version: 18.3.3
   resolution: "@types/react@npm:18.3.3"