diff --git a/Cargo.lock b/Cargo.lock
index aa91ce42..5c9c9696 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -538,6 +538,12 @@ version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d468802bab17cbc0cc575e9b053f41e72aa36bfa6b7f55e3529ffa43161b97fa"
 
+[[package]]
+name = "base16ct"
+version = "0.1.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "349a06037c7bf932dd7e7d1f653678b2038b9ad46a74102f1fc7bd7872678cce"
+
 [[package]]
 name = "base64"
 version = "0.13.1"
@@ -720,6 +726,27 @@ version = "1.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "38fcc2979eff34a4b84e1cf9a1e3da42a7d44b3b690a40cdcb23e3d556cfb2e5"
 
+[[package]]
+name = "bzip2"
+version = "0.4.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "bdb116a6ef3f6c3698828873ad02c3014b3c85cadb88496095628e3ef1e347f8"
+dependencies = [
+ "bzip2-sys",
+ "libc",
+]
+
+[[package]]
+name = "bzip2-sys"
+version = "0.1.11+1.0.8"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "736a955f3fa7875102d57c82b8cac37ec45224a07fd32d58f9f7a186b6cd4cdc"
+dependencies = [
+ "cc",
+ "libc",
+ "pkg-config",
+]
+
 [[package]]
 name = "cache-padded"
 version = "1.3.0"
@@ -1348,6 +1375,7 @@ dependencies = [
  "flume",
  "futures",
  "futures-concurrency",
+ "rosbag",
  "serde",
  "serde_json",
  "serde_yaml 0.8.26",
@@ -2687,6 +2715,26 @@ dependencies = [
  "value-bag",
 ]
 
+[[package]]
+name = "lz4"
+version = "1.24.0"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "7e9e2dd86df36ce760a60f6ff6ad526f7ba1f14ba0356f8254fb6905e6494df1"
+dependencies = [
+ "libc",
+ "lz4-sys",
+]
+
+[[package]]
+name = "lz4-sys"
+version = "1.9.4"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "57d27b317e207b10f69f5e75494119e391a96f48861ae870d1da6edac98ca900"
+dependencies = [
+ "cc",
+ "libc",
+]
+
 [[package]]
 name = "macro_rules_attribute"
 version = "0.1.3"
@@ -2727,6 +2775,15 @@ version = "2.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2dffe52ecf27772e601905b7522cb4ef790d2cc203488bbd0e2fe85fcb74566d"
 
+[[package]]
+name = "memmap2"
+version = "0.5.10"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "83faa42c0a078c393f6b29d5db232d8be22776a891f8f56e5284faee4a20b327"
+dependencies = [
+ "libc",
+]
+
 [[package]]
 name = "memoffset"
 version = "0.6.5"
@@ -3981,6 +4038,20 @@ dependencies = [
  "cache-padded",
 ]
 
+[[package]]
+name = "rosbag"
+version = "0.6.1"
+source = "registry+https://github.com/rust-lang/crates.io-index"
+checksum = "4c470a1a13c7daccdf26cf9b1ee22da130ba39541e384b8054df9537b86b2961"
+dependencies = [
+ "base16ct",
+ "byteorder",
+ "bzip2",
+ "log",
+ "lz4",
+ "memmap2",
+]
+
 [[package]]
 name = "rsa"
 version = "0.7.2"
diff --git a/binaries/daemon/Cargo.toml b/binaries/daemon/Cargo.toml
index c36fae7a..b33053ce 100644
--- a/binaries/daemon/Cargo.toml
+++ b/binaries/daemon/Cargo.toml
@@ -37,3 +37,4 @@ shared-memory-server = { workspace = true }
 ctrlc = "3.2.5"
 bincode = "1.3.3"
 async-trait = "0.1.64"
+rosbag = "0.6.1"
diff --git a/binaries/daemon/src/lib.rs b/binaries/daemon/src/lib.rs
index fdb59b39..ec48dd67 100644
--- a/binaries/daemon/src/lib.rs
+++ b/binaries/daemon/src/lib.rs
@@ -564,11 +564,9 @@ impl Daemon {
         };
 
         if record {
-            dataflow.recorder = Some(Recorder::new(
-                working_dir.clone(),
-                self.machine_id.clone(),
-                dataflow_id,
-            ));
+            dataflow.recorder = Some(
+                Recorder::new(working_dir.clone(), self.machine_id.clone(), dataflow_id).await?,
+            );
         }
 
         for node in nodes {
@@ -943,37 +941,47 @@ impl Daemon {
 
         dataflow.running_nodes.remove(node_id);
         if dataflow.running_nodes.is_empty() {
-            let result = match self.dataflow_errors.get(&dataflow.id) {
-                None => Ok(()),
-                Some(errors) => {
-                    let mut output = "some nodes failed:".to_owned();
-                    for (node, error) in errors {
-                        use std::fmt::Write;
-                        write!(&mut output, "\n  - {node}: {error}").unwrap();
-                    }
-                    Err(output)
+            self.handle_dataflow_finished(dataflow_id).await?;
+        }
+        Ok(())
+    }
+
+    async fn handle_dataflow_finished(&mut self, dataflow_id: Uuid) -> Result<(), eyre::ErrReport> {
+        let Some(dataflow) = self.running.remove(&dataflow_id) else {
+            return Ok(())
+        };
+        if let Some(recorder) = dataflow.recorder {
+            recorder.finish().await?;
+        }
+        let result = match self.dataflow_errors.get(&dataflow.id) {
+            None => Ok(()),
+            Some(errors) => {
+                let mut output = "some nodes failed:".to_owned();
+                for (node, error) in errors {
+                    use std::fmt::Write;
+                    write!(&mut output, "\n  - {node}: {error}").unwrap();
                 }
-            };
-            tracing::info!(
-                "Dataflow `{dataflow_id}` finished on machine `{}`",
-                self.machine_id
-            );
-            if let Some(connection) = &mut self.coordinator_connection {
-                let msg = serde_json::to_vec(&Timestamped {
-                    inner: CoordinatorRequest::Event {
-                        machine_id: self.machine_id.clone(),
-                        event: DaemonEvent::AllNodesFinished {
-                            dataflow_id,
-                            result,
-                        },
-                    },
-                    timestamp: self.clock.new_timestamp(),
-                })?;
-                tcp_send(connection, &msg)
-                    .await
-                    .wrap_err("failed to report dataflow finish to dora-coordinator")?;
+                Err(output)
             }
-            self.running.remove(&dataflow_id);
+        };
+        tracing::info!(
+            "Dataflow `{dataflow_id}` finished on machine `{}`",
+            self.machine_id
+        );
+        if let Some(connection) = &mut self.coordinator_connection {
+            let msg = serde_json::to_vec(&Timestamped {
+                inner: CoordinatorRequest::Event {
+                    machine_id: self.machine_id.clone(),
+                    event: DaemonEvent::AllNodesFinished {
+                        dataflow_id,
+                        result,
+                    },
+                },
+                timestamp: self.clock.new_timestamp(),
+            })?;
+            tcp_send(connection, &msg)
+                .await
+                .wrap_err("failed to report dataflow finish to dora-coordinator")?;
         }
         Ok(())
     }
diff --git a/binaries/daemon/src/record.rs b/binaries/daemon/src/record.rs
deleted file mode 100644
index 8d79375c..00000000
--- a/binaries/daemon/src/record.rs
+++ /dev/null
@@ -1,74 +0,0 @@
-use std::path::PathBuf;
-
-use dora_core::{daemon_messages::DataflowId, message::uhlc::Timestamp};
-use eyre::Context;
-use tokio::io::AsyncWriteExt;
-
-use crate::Event;
-
-pub struct Recorder {
-    working_dir: PathBuf,
-    machine_id: String,
-    dataflow_id: DataflowId,
-}
-
-impl Recorder {
-    pub fn new(working_dir: PathBuf, machine_id: String, dataflow_id: DataflowId) -> Self {
-        Self {
-            working_dir,
-            machine_id,
-            dataflow_id,
-        }
-    }
-
-    pub async fn record(&mut self, event: &crate::Event, timestamp: Timestamp) -> eyre::Result<()> {
-        let entry = RecordEntry { timestamp, event };
-        let rendered = serde_json::to_string(&entry).context("failed to serialize record entry")?;
-
-        let record_folder = self.record_folder().await?;
-        let record_file_path = record_folder.join(format!("events-{}.json", self.machine_id));
-        let mut record_file = tokio::fs::OpenOptions::new()
-            .create(true)
-            .append(true)
-            .open(&record_file_path)
-            .await
-            .wrap_err_with(|| {
-                format!(
-                    "failed to open record file at {}",
-                    record_file_path.display()
-                )
-            })?;
-        record_file
-            .write_all(rendered.as_bytes())
-            .await
-            .context("failed to write event to record file")?;
-        record_file
-            .write_all("\n".as_bytes())
-            .await
-            .context("failed to write newline to record file")?;
-
-        Ok(())
-    }
-
-    async fn record_folder(&mut self) -> Result<PathBuf, eyre::ErrReport> {
-        let record_folder = self
-            .working_dir
-            .join("record")
-            .join(self.dataflow_id.to_string());
-        tokio::fs::create_dir_all(&record_folder)
-            .await
-            .wrap_err_with(|| {
-                format!(
-                    "failed to create record folder at {}",
-                    record_folder.display()
-                )
-            })?;
-        Ok(record_folder)
-    }
-}
-
-#[derive(Debug, serde::Serialize)]
-struct RecordEntry<'a> {
-    timestamp: Timestamp,
-    event: &'a Event,
-}
diff --git a/binaries/daemon/src/record/json.rs b/binaries/daemon/src/record/json.rs
new file mode 100644
index 00000000..ed014f2c
--- /dev/null
+++ b/binaries/daemon/src/record/json.rs
@@ -0,0 +1,46 @@
+use std::path::Path;
+
+use dora_core::message::uhlc::Timestamp;
+use eyre::Context;
+use tokio::{fs::File, io::AsyncWriteExt};
+
+use crate::Event;
+
+pub struct JsonFile {
+    file: File,
+}
+
+impl JsonFile {
+    pub async fn new(path: &Path) -> eyre::Result<Self> {
+        let file = tokio::fs::OpenOptions::new()
+            .create(true)
+            .append(true)
+            .open(&path)
+            .await
+            .wrap_err_with(|| format!("failed to open record file at {}", path.display()))?;
+        Ok(Self { file })
+    }
+
+    pub async fn record(&mut self, timestamp: Timestamp, event: &Event) -> eyre::Result<()> {
+        let json = format(timestamp, event)?;
+        self.file
+            .write_all(json.as_bytes())
+            .await
+            .context("failed to write event to record file")?;
+        Ok(())
+    }
+}
+
+fn format(
+    timestamp: dora_core::message::uhlc::Timestamp,
+    event: &crate::Event,
+) -> eyre::Result<String> {
+    let entry = RecordEntry { timestamp, event };
+    serde_json::to_string(&entry).context("failed to serialize record entry")
+}
+
+#[derive(Debug, serde::Serialize)]
+struct RecordEntry<'a> {
+    timestamp: Timestamp,
+    event: &'a Event,
+}
diff --git a/binaries/daemon/src/record/mod.rs b/binaries/daemon/src/record/mod.rs
new file mode 100644
index 00000000..03d006d4
--- /dev/null
+++ b/binaries/daemon/src/record/mod.rs
@@ -0,0 +1,63 @@
+use std::path::{Path, PathBuf};
+
+use dora_core::{daemon_messages::DataflowId, message::uhlc::Timestamp};
+use eyre::Context;
+
+use self::{json::JsonFile, rosbag::RosbagFile};
+
+mod json;
+mod rosbag;
+
+pub struct Recorder {
+    json_file: JsonFile,
+    rosbag_file: RosbagFile,
+}
+
+impl Recorder {
+    pub async fn new(
+        working_dir: PathBuf,
+        machine_id: String,
+        dataflow_id: DataflowId,
+    ) -> eyre::Result<Self> {
+        let record_folder = Self::record_folder(&working_dir, dataflow_id).await?;
+
+        let json_file_path = record_folder.join(format!("events-{}.json", machine_id));
+        let json_file = JsonFile::new(&json_file_path).await?;
+
+        let rosbag_file_path = record_folder.join(format!("events-{}.bag", machine_id));
+        let rosbag_file = RosbagFile::new(&rosbag_file_path).await?;
+
+        Ok(Self {
+            json_file,
+            rosbag_file,
+        })
+    }
+
+    pub async fn record(&mut self, event: &crate::Event, timestamp: Timestamp) -> eyre::Result<()> {
+        self.json_file.record(timestamp, event).await?;
+        self.rosbag_file.record(timestamp, event).await?;
+
+        Ok(())
+    }
+
+    pub async fn finish(self) -> eyre::Result<()> {
+        self.rosbag_file.finish().await?;
+        Ok(())
+    }
+
+    async fn record_folder(
+        working_dir: &Path,
+        dataflow_id: DataflowId,
+    ) -> Result<PathBuf, eyre::ErrReport> {
+        let record_folder = working_dir.join("record").join(dataflow_id.to_string());
+        tokio::fs::create_dir_all(&record_folder)
+            .await
+            .wrap_err_with(|| {
+                format!(
+                    "failed to create record folder at {}",
+                    record_folder.display()
+                )
+            })?;
+        Ok(record_folder)
+    }
+}
diff --git a/binaries/daemon/src/record/rosbag.rs b/binaries/daemon/src/record/rosbag.rs
new file mode 100644
index 00000000..0c272eb8
--- /dev/null
+++ b/binaries/daemon/src/record/rosbag.rs
@@ -0,0 +1,90 @@
+use std::path::Path;
+
+use dora_core::message::uhlc::Timestamp;
+use eyre::Context;
+use tokio::{
+    fs::File,
+    io::{AsyncWrite, AsyncWriteExt},
+};
+
+use crate::Event;
+
+pub struct RosbagFile {
+    file: File,
+    record: Record,
+}
+
+impl RosbagFile {
+    pub async fn new(path: &Path) -> eyre::Result<Self> {
+        let mut file = tokio::fs::OpenOptions::new()
+            .create(true)
+            .append(true)
+            .open(&path)
+            .await
+            .wrap_err_with(|| format!("failed to open record file at {}", path.display()))?;
+        file.write_all("#ROSBAG V2.0\n".as_bytes())
+            .await
+            .context("failed to write rosbag header")?;
+        Ok(Self {
+            file,
+            record: Record {
+                header: Vec::new(),
+                data: Vec::new(),
+            },
+        })
+    }
+
+    pub async fn record(&mut self, timestamp: Timestamp, event: &Event) -> eyre::Result<()> {
+        tracing::warn!("rosbag recording is not implemented yet");
+        Ok(())
+    }
+
+    pub async fn finish(mut self) -> eyre::Result<()> {
+        self.record.serialize(&mut self.file).await
+    }
+}
+
+struct Record {
+    header: Vec<HeaderField>,
+    data: Vec<u8>,
+}
+
+impl Record {
+    async fn serialize(&self, writer: &mut (impl AsyncWrite + Unpin)) -> eyre::Result<()> {
+        let serialized_header = {
+            let mut buf = Vec::new();
+            for field in &self.header {
+                field.serialize(&mut buf).await?;
+            }
+            buf
+        };
+
+        writer
+            .write_all(&u32::try_from(serialized_header.len())?.to_le_bytes())
+            .await?;
+        writer.write_all(&serialized_header).await?;
+        writer
+            .write_all(&u32::try_from(self.data.len())?.to_le_bytes())
+            .await?;
+        writer.write_all(&self.data).await?;
+
+        Ok(())
+    }
+}
+
+struct HeaderField {
+    name: String,
+    value: Vec<u8>,
+}
+
+impl HeaderField {
+    async fn serialize(&self, writer: &mut (impl AsyncWrite + Unpin)) -> eyre::Result<()> {
+        let len = self.name.len() + self.value.len() + 5;
+        writer.write_all(&u32::try_from(len)?.to_le_bytes()).await?;
+        writer.write_all(self.name.as_bytes()).await?;
+        writer.write_all(&[b'=']).await?;
+        writer.write_all(&self.value).await?;
+
+        Ok(())
+    }
+}