diff --git a/apps/api/prisma/migrations/20251010150458_init/migration.sql b/apps/api/prisma/migrations/20251010150458_init/migration.sql
new file mode 100644
index 0000000..6ae3afa
--- /dev/null
+++ b/apps/api/prisma/migrations/20251010150458_init/migration.sql
@@ -0,0 +1,46 @@
+-- CreateTable
+CREATE TABLE "QueryCount" (
+    "id" INTEGER NOT NULL DEFAULT 1,
+    "total_queries" BIGINT NOT NULL,
+
+    CONSTRAINT "QueryCount_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateTable
+CREATE TABLE "User" (
+    "id" TEXT NOT NULL,
+    "email" TEXT NOT NULL,
+    "firstName" TEXT NOT NULL,
+    "authMethod" TEXT NOT NULL,
+    "createdAt" TIMESTAMP(3) NOT NULL DEFAULT CURRENT_TIMESTAMP,
+    "lastLogin" TIMESTAMP(3) NOT NULL,
+
+    CONSTRAINT "User_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateTable
+CREATE TABLE "Account" (
+    "id" TEXT NOT NULL,
+    "userId" TEXT NOT NULL,
+    "type" TEXT NOT NULL,
+    "provider" TEXT NOT NULL,
+    "providerAccountId" TEXT NOT NULL,
+    "refresh_token" TEXT,
+    "access_token" TEXT,
+    "expires_at" INTEGER,
+    "token_type" TEXT,
+    "scope" TEXT,
+    "id_token" TEXT,
+    "session_state" TEXT,
+
+    CONSTRAINT "Account_pkey" PRIMARY KEY ("id")
+);
+
+-- CreateIndex
+CREATE UNIQUE INDEX "User_email_key" ON "User"("email");
+
+-- CreateIndex
+CREATE UNIQUE INDEX "Account_provider_providerAccountId_key" ON "Account"("provider", "providerAccountId");
+
+-- AddForeignKey
+ALTER TABLE "Account" ADD CONSTRAINT "Account_userId_fkey" FOREIGN KEY ("userId") REFERENCES "User"("id") ON DELETE CASCADE ON UPDATE CASCADE;
diff --git a/apps/api/prisma/migrations/migration_lock.toml b/apps/api/prisma/migrations/migration_lock.toml
new file mode 100644
index 0000000..044d57c
--- /dev/null
+++ b/apps/api/prisma/migrations/migration_lock.toml
@@ -0,0 +1,3 @@
+# Please do not edit this file manually
+# It should be added in your version-control system (e.g., Git)
+provider = "postgresql"
diff --git a/apps/api/src/routers/projects.ts b/apps/api/src/routers/projects.ts
index f3006d9..5eaaaa3 100644
--- a/apps/api/src/routers/projects.ts
+++ b/apps/api/src/routers/projects.ts
@@ -5,7 +5,7 @@ import { projectService } from "../services/project.service.js";
 import { queryService } from "../services/query.service.js";
 
 const filterPropsSchema = z.object({
-  language: z.string().optional(),
+  language: z.array(z.string()).optional(),
   stars: z
     .object({
       min: z.string().optional(),
@@ -40,9 +40,6 @@ export const projectRouter = router({
     .input(inputSchema)
     .query(async ({ input, ctx }: any): Promise<RepositoryProps[]> => {
       await queryService.incrementQueryCount(ctx.db.prisma);
-      return await projectService.fetchGithubProjects(
-        input.filters as any,
-        input.options as any
-      );
+      return await projectService.fetchGithubProjects(input.filters as any, input.options as any);
     }),
 });
diff --git a/apps/api/src/services/project.service.ts b/apps/api/src/services/project.service.ts
index 7ae4d5e..8317f57 100644
--- a/apps/api/src/services/project.service.ts
+++ b/apps/api/src/services/project.service.ts
@@ -1,11 +1,6 @@
 import { graphql } from "@octokit/graphql";
 import dotenv from "dotenv";
-import type {
-  FilterProps,
-  RepositoryProps,
-  GraphQLResponseProps,
-  OptionsTypesProps,
-} from "@opensox/shared";
+import type { FilterProps, RepositoryProps, GraphQLResponseProps, OptionsTypesProps } from "@opensox/shared";
 
 dotenv.config();
 
diff --git a/apps/web/src/components/ui/Filter.tsx b/apps/web/src/components/ui/Filter.tsx
index 5c1340b..33e539e 100644
--- a/apps/web/src/components/ui/Filter.tsx
+++ b/apps/web/src/components/ui/Filter.tsx
@@ -5,63 +5,83 @@ import { RadioGroup, RadioGroupItem } from "@/components/ui/radio-group";
 import { Label } from "@/components/ui/label";
 import { useFilterInputStore } from "@/store/useFilterInputStore";
 import clsx from "clsx";
+import { useState } from "react";
+import { Checkbox } from "./checkbox";
 
 export default function Filter({
   filterName,
   filters,
   onClick,
+  multiple = false,
 }: {
   filterName: string;
   filters: string[];
   onClick?: () => void;
+  multiple?: boolean;
 }) {
   const { updateFilters } = useFilterInputStore();
-  const inputData: { [key: string]: string } = {};
+  const [selected, setSelected] = useState<string | string[]>(multiple ? [] : "");
+
   const recordFilterInput = (filter: string) => {
-    inputData[filterName] = filter;
-    updateFilters(inputData);
+    let updatedValue: string | string[];
+
+    if (multiple) {
+      // Toggle checkbox selections
+      const current = selected as string[];
+      updatedValue = current.includes(filter) ? current.filter((f) => f !== filter) : [...current, filter];
+    } else {
+      // Single choice (radio)
+      updatedValue = filter;
+    }
+
+    setSelected(updatedValue);
+    updateFilters({ [filterName]: updatedValue });
   };
 
   const triggerClasses = clsx("text-sm font-medium", {
-    "text-slate-500": ["Hire contributors", "Funding", "Trending"].includes(
-      filterName
-    ),
+    "text-slate-500": ["Hire contributors", "Funding", "Trending"].includes(filterName),
   });
 
   return (
     <div onClick={onClick}>
       <AccordionItem value={filterName} className="px-3">
-        <AccordionTrigger className={triggerClasses}>
-          {filterName}
-        </AccordionTrigger>
+        <AccordionTrigger className={triggerClasses}>{filterName}</AccordionTrigger>
         <AccordionContent
           className={
-            filterName === "Hire contributors" ||
-            filterName === "Funding" ||
-            filterName === "Trending"
+            filterName === "Hire contributors" || filterName === "Funding" || filterName === "Trending"
               ? "text-white-100"
               : ""
           }
         >
-          <RadioGroup>
-            {filters.map((filter) => (
-              <div key={filter} className="flex items-center space-x-2">
-                <RadioGroupItem
-                  value={filter}
-                  id={filter}
-                  onClick={() => {
-                    recordFilterInput(filter);
-                  }}
-                />
-                <Label
-                  htmlFor={filter}
-                  onClick={() => recordFilterInput(filter)}
-                >
-                  {filter}
-                </Label>
-              </div>
-            ))}
-          </RadioGroup>
+          {multiple ? (
+            // Multiple-choice (checkbox)
+            <div className="space-y-2">
+              {filters.map((filter) => (
+                <div key={filter} className="flex items-center space-x-2 cursor-pointer">
+                  <Checkbox
+                    id={filter}
+                    checked={(selected as string[]).includes(filter)}
+                    onCheckedChange={() => recordFilterInput(filter)}
+                  />
+                  <Label htmlFor={filter} className="cursor-pointer select-none">
+                    {filter}
+                  </Label>
+                </div>
+              ))}
+            </div>
+          ) : (
+            // Single-choice (radio)
+            <RadioGroup value={selected as string}>
+              {filters.map((filter) => (
+                <div key={filter} className="flex items-center space-x-2">
+                  <RadioGroupItem value={filter} id={filter} onClick={() => recordFilterInput(filter)} />
+                  <Label htmlFor={filter} onClick={() => recordFilterInput(filter)}>
+                    {filter}
+                  </Label>
+                </div>
+              ))}
+            </RadioGroup>
+          )}
         </AccordionContent>
       </AccordionItem>
     </div>
diff --git a/apps/web/src/components/ui/FiltersContainer.tsx b/apps/web/src/components/ui/FiltersContainer.tsx
index 9eb79e3..9e44214 100644
--- a/apps/web/src/components/ui/FiltersContainer.tsx
+++ b/apps/web/src/components/ui/FiltersContainer.tsx
@@ -8,10 +8,7 @@ import Filter from "./Filter";
 import { useFilterStore } from "@/store/useFilterStore";
 import { useFilterInputStore } from "@/store/useFilterInputStore";
 import { useGetProjects } from "@/hooks/useGetProjects";
-import {
-  convertUserInputToApiInput,
-  convertApiOutputToUserOutput,
-} from "@/utils/converter";
+import { convertUserInputToApiInput, convertApiOutputToUserOutput } from "@/utils/converter";
 import { useRouter } from "next/navigation";
 import { useRenderProjects } from "@/store/useRenderProjectsStore";
 import { useProjectsData } from "@/store/useProjectsDataStore";
@@ -58,18 +55,12 @@ export default function FiltersContainer() {
 
   return (
     <div className="fixed top-8 md:top-14 right-4 md:right-2 inset-0 z-50 flex justify-center items-start p-4 lg:p-0">
-      <div
-        className="fixed inset-0 bg-black/20"
-        onClick={() => toggleShowFilters()}
-      />
+      <div className="fixed inset-0 bg-black/20" onClick={() => toggleShowFilters()} />
       <div className="w-full max-w-[90%] md:max-w-[400px] lg:w-80 h-[60vh] lg:h-96 flex flex-col rounded-lg border border-ox-gray bg-ox-black-1 relative lg:absolute lg:right-20">
         <div className="flex h-8 lg:h-[10%] border-b border-ox-gray justify-between items-center px-4">
           <h1 className="text-sm text-ox-purple font-semibold">Filters</h1>
           <IconWrapper>
-            <XMarkIcon
-              className="size-5 lg:size-4 text-ox-purple"
-              onClick={() => toggleShowFilters()}
-            />
+            <XMarkIcon className="size-5 lg:size-4 text-ox-purple" onClick={() => toggleShowFilters()} />
           </IconWrapper>
         </div>
 
@@ -95,38 +86,15 @@ export default function FiltersContainer() {
                 "Html",
                 "Elixir",
               ]}
+              multiple={true}
             />
-            <Filter
-              filterName="Popularity"
-              filters={["Very low", "Low", "Moderate", "High", "Very high"]}
-            />
-            <Filter
-              filterName="Competition"
-              filters={["Very low", "Low", "Moderate", "High", "Very high"]}
-            />
-            <Filter
-              filterName="Stage"
-              filters={["Very early", "Early", "Emerging", "Established"]}
-            />
-            <Filter
-              filterName="Activity"
-              filters={["Highest", "High", "Normal", "Low"]}
-            />
-            <Filter
-              filterName="Hire contributors"
-              filters={[]}
-              onClick={handleClickWipFilters}
-            />
-            <Filter
-              filterName="Funding"
-              filters={[]}
-              onClick={handleClickWipFilters}
-            />
-            <Filter
-              filterName="Trending"
-              filters={[]}
-              onClick={handleClickWipFilters}
-            />
+            <Filter filterName="Popularity" filters={["Very low", "Low", "Moderate", "High", "Very high"]} />
+            <Filter filterName="Competition" filters={["Very low", "Low", "Moderate", "High", "Very high"]} />
+            <Filter filterName="Stage" filters={["Very early", "Early", "Emerging", "Established"]} />
+            <Filter filterName="Activity" filters={["Highest", "High", "Normal", "Low"]} />
+            <Filter filterName="Hire contributors" filters={[]} onClick={handleClickWipFilters} />
+            <Filter filterName="Funding" filters={[]} onClick={handleClickWipFilters} />
+            <Filter filterName="Trending" filters={[]} onClick={handleClickWipFilters} />
           </Accordion>
         </div>
 
diff --git a/apps/web/src/store/useFilterInputStore.ts b/apps/web/src/store/useFilterInputStore.ts
index 927eb80..dbdfd66 100644
--- a/apps/web/src/store/useFilterInputStore.ts
+++ b/apps/web/src/store/useFilterInputStore.ts
@@ -1,8 +1,8 @@
 import { create } from "zustand";
 
 interface FilterInputState {
-  filters: object;
-  updateFilters: (newFilter: Record<string, string>) => void;
+  filters: Record<string, string | string[]>;
+  updateFilters: (newFilter: Record<string, string | string[]>) => void;
   resetFilters: () => void;
 }
 
diff --git a/apps/web/src/types/filter.ts b/apps/web/src/types/filter.ts
index db245af..593f5e2 100644
--- a/apps/web/src/types/filter.ts
+++ b/apps/web/src/types/filter.ts
@@ -48,7 +48,7 @@ export type ProjectProps = {
 };
 
 export type UserInputFilterProps = {
-  "Tech stack"?: string;
+  "Tech stack"?: string[];
   Popularity?: string;
   Competition?: string;
   Stage?: string;
diff --git a/packages/shared/types/filter.ts b/packages/shared/types/filter.ts
index 602d308..a7155d4 100644
--- a/packages/shared/types/filter.ts
+++ b/packages/shared/types/filter.ts
@@ -1,23 +1,23 @@
 export type DateRange = {
-    start: string;
-    end?: string;
-}
+  start: string;
+  end?: string;
+};
 
 export type StarRange = {
-    min?: string;
-    max?: string;
-    custom?: string;
-}
+  min?: string;
+  max?: string;
+  custom?: string;
+};
 
 export type ForkRange = {
-    min?: string;
-    max?: string;
-}
+  min?: string;
+  max?: string;
+};
 
 export type FilterProps = {
-    language?: string;
-    stars?: StarRange;
-    forks?: ForkRange;
-    pushed?: string;
-    created?: string;
-}
\ No newline at end of file
+  language?: string[];
+  stars?: StarRange;
+  forks?: ForkRange;
+  pushed?: string;
+  created?: string;
+};