From 7b675906d7012f49863c8ec0b42b0c60baefc8dd Mon Sep 17 00:00:00 2001
From: oliverhuangcode <oliverwhuang@gmail.com>
Date: Mon, 27 Apr 2026 22:08:05 +1000
Subject: [PATCH 1/2] Update sponsor algorithm

---
 frontend/next-env.d.ts             |  2 +-
 frontend/src/actions/jobs.fetch.ts | 38 +++++++++++++++++++++---------
 2 files changed, 28 insertions(+), 12 deletions(-)

diff --git a/frontend/next-env.d.ts b/frontend/next-env.d.ts
index 9edff1c..c4b7818 100644
--- a/frontend/next-env.d.ts
+++ b/frontend/next-env.d.ts
@@ -1,6 +1,6 @@
 /// <reference types="next" />
 /// <reference types="next/image-types/global" />
-import "./.next/types/routes.d.ts";
+import "./.next/dev/types/routes.d.ts";
 
 // NOTE: This file should not be edited
 // see https://nextjs.org/docs/app/api-reference/config/typescript for more information.
diff --git a/frontend/src/actions/jobs.fetch.ts b/frontend/src/actions/jobs.fetch.ts
index 7ac1f23..2413881 100644
--- a/frontend/src/actions/jobs.fetch.ts
+++ b/frontend/src/actions/jobs.fetch.ts
@@ -136,18 +136,32 @@ async function withDbConnection<T>(
   }
 }
 
+const SPONSOR_TIERS: Record<string, number> = {
+  // Platinum (rank 0) — highest priority
+  "Jane Street": 0,
+  Atlassian: 0,
+  // Gold (rank 1)
+  "Citadel Securities": 1,
+  Canva: 1,
+  "Lyra Technologies": 1,
+  Susquehanna: 1,
+  IMC: 1,
+  Vivcourt: 1,
+  // Silver (rank 2)
+  "January Capital": 2,
+  Optiver: 2,
+};
+
 /**
  * Fetches paginated and filtered job listings from MongoDB.
  */
 export async function getJobs(
   filters: Partial<JobFilters>,
   minSponsors: number = -1,
-  prioritySponsors: Array<string> = ["IMC", "Atlassian"],
 ): Promise<{ jobs: Job[]; total: number }> {
   const page = filters.page || 1;
   const normalizedFilters = normalizeFiltersForKey(filters);
-  const priorityStr = prioritySponsors.sort().join(",");
-  const cacheKey = `jobs:${JSON.stringify(normalizedFilters)}:${page}:${minSponsors}:${priorityStr}`;
+  const cacheKey = `jobs:${JSON.stringify(normalizedFilters)}:${page}:${minSponsors}`;
 
   // Check cache first
   const cached = jobCache.get(cacheKey);
@@ -156,10 +170,7 @@ export async function getJobs(
     return cached as { jobs: Job[]; total: number };
   }
 
-  logger.info(
-    { filters, minSponsors, prioritySponsors },
-    "Fetching jobs with filters",
-  );
+  logger.info({ filters, minSponsors }, "Fetching jobs with filters");
 
   return await withDbConnection(async (client) => {
     const collection = client.db("default").collection("active_jobs");
@@ -196,11 +207,16 @@ export async function getJobs(
           ])
           .toArray();
 
+        // Sort by tier (platinum=0 first, gold=1, silver=2, unknown=3),
+        // shuffling randomly within each tier.
         sponsoredJobs = sponsoredJobs
-          .filter((job) => {
-            const isPriority = prioritySponsors.includes(job.company.name);
-            return isPriority ? Math.random() < 0.65 : Math.random() >= 0.35;
-          })
+          .map((job) => ({
+            job,
+            rank: SPONSOR_TIERS[job.company?.name as string] ?? 3,
+            rand: Math.random(),
+          }))
+          .sort((a, b) => a.rank - b.rank || a.rand - b.rand)
+          .map(({ job }) => job)
           .slice(0, minSponsors)
           .map((job) => ({ ...job, highlight: true }));
 

From 7eff07df2a34c910e308bc7ca8765f76f93ca62d Mon Sep 17 00:00:00 2001
From: oliverhuangcode <oliverwhuang@gmail.com>
Date: Tue, 28 Apr 2026 20:34:11 +1000
Subject: [PATCH 2/2] Fix pagination siblings

---
 frontend/src/components/jobs/job-pagination.tsx | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/frontend/src/components/jobs/job-pagination.tsx b/frontend/src/components/jobs/job-pagination.tsx
index 8950489..59b239f 100644
--- a/frontend/src/components/jobs/job-pagination.tsx
+++ b/frontend/src/components/jobs/job-pagination.tsx
@@ -48,7 +48,7 @@ export default function JobPagination({ pageSize = 20 }: JobPaginationProps) {
         size="md"
         gap={12}
         boundaries={1}
-        siblings={0}
+        siblings={1}
         radius="lg"
         color="accent"
         getItemProps={(page) => ({