diff --git a/diachron/cmd.d/test b/diachron/cmd.d/test
index 09a0b3a..7319eb7 100755
--- a/diachron/cmd.d/test
+++ b/diachron/cmd.d/test
@@ -4,7 +4,7 @@ set -eu
 
 DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 
-cd "$DIR/../../express"
+cd "$DIR/../../backend"
 
 if [ $# -eq 0 ]; then
     # Find all test files - use -print0/xargs to handle filenames safely
diff --git a/diachron/common.d/migrate b/diachron/common.d/migrate
index 93edf74..2d9be2c 100755
--- a/diachron/common.d/migrate
+++ b/diachron/common.d/migrate
@@ -5,5 +5,5 @@ set -eu
 DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 ROOT="$DIR/../.."
 
-cd "$ROOT/express"
+cd "$ROOT/backend"
 "$DIR"/tsx migrate.ts "$@"
diff --git a/diachron/develop.d/reset-db b/diachron/develop.d/reset-db
index ac11200..1ed6332 100755
--- a/diachron/develop.d/reset-db
+++ b/diachron/develop.d/reset-db
@@ -5,5 +5,5 @@ set -eu
 DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 ROOT="$DIR/../.."
 
-cd "$ROOT/express"
+cd "$ROOT/backend"
 "$DIR"/../cmd.d/tsx develop/reset-db.ts "$@"
diff --git a/diachron/mgmt.d/add-user b/diachron/mgmt.d/add-user
index c3c71bd..ec21149 100755
--- a/diachron/mgmt.d/add-user
+++ b/diachron/mgmt.d/add-user
@@ -5,5 +5,5 @@ set -eu
 DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
 ROOT="$DIR/../.."
 
-cd "$ROOT/express"
+cd "$ROOT/backend"
 "$DIR"/../cmd.d/tsx mgmt/add-user.ts "$@"
diff --git a/master/runexpress.go b/master/runexpress.go
index 3162512..7b1fd13 100644
--- a/master/runexpress.go
+++ b/master/runexpress.go
@@ -33,7 +33,7 @@ func runExpress(changes <-chan FileChange, numProcesses int, basePort int, pool
 
 		// start spawns the worker process. Caller must NOT hold w.mu.
 		start := func() bool {
-			cmd := exec.Command("../express/run.sh", "--listen", w.addr)
+			cmd := exec.Command("../backend/run.sh", "--listen", w.addr)
 			cmd.Stdout = os.Stdout
 			cmd.Stderr = os.Stderr
 
@@ -182,7 +182,7 @@ func runExpress(changes <-chan FileChange, numProcesses int, basePort int, pool
 	runBuild := func() bool {
 		log.Printf("[build] Starting ncc build...")
 
-		cmd := exec.Command("../express/build.sh")
+		cmd := exec.Command("../backend/build.sh")
 
 		stdout, _ := cmd.StdoutPipe()
 		stderr, _ := cmd.StderrPipe()