diff --git a/Cargo.lock b/Cargo.lock
index 1335239..e359619 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2176,6 +2176,17 @@ dependencies = [
  "unicode-normalization",
 ]
 
+[[package]]
+name = "pyo3_rayon"
+version = "0.1.0"
+dependencies = [
+ "csv",
+ "pyo3",
+ "rayon",
+ "regex",
+ "serde",
+]
+
 [[package]]
 name = "quote"
 version = "1.0.35"
diff --git a/Cargo.toml b/Cargo.toml
index 13bb738..8ee0857 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -13,5 +13,6 @@ members = [
   "src/rest_api_postgres/rust",
   "src/parallelism/rust",
   "src/pyo3_mock_data",
+  "src/pyo3_rayon",
 ]
 resolver = "2"
diff --git a/src/pyo3_rayon/Cargo.toml b/src/pyo3_rayon/Cargo.toml
new file mode 100644
index 0000000..7397338
--- /dev/null
+++ b/src/pyo3_rayon/Cargo.toml
@@ -0,0 +1,17 @@
+[package]
+name = "pyo3_rayon"
+version = "0.1.0"
+edition = "2021"
+
+[lib]
+name = "pyo3_rayon"
+crate-type = ["cdylib"]
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+csv = "1.3.0"
+pyo3 = { version = "0.20.2", features = ["abi3-py38", "extension-module"] }
+rayon = "1.8.1"
+regex = "1.10.3"
+serde = { version = "1.0.196", features = ["derive"] }
diff --git a/src/pyo3_rayon/requirements.txt b/src/pyo3_rayon/requirements.txt
new file mode 100644
index 0000000..2dbbe3d
--- /dev/null
+++ b/src/pyo3_rayon/requirements.txt
@@ -0,0 +1 @@
+maturin==1.4.0
diff --git a/src/pyo3_rayon/src/lib.rs b/src/pyo3_rayon/src/lib.rs
new file mode 100644
index 0000000..149d9be
--- /dev/null
+++ b/src/pyo3_rayon/src/lib.rs
@@ -0,0 +1,67 @@
+use pyo3::prelude::*;
+use rayon::prelude::*;
+use regex::{Captures, Regex};
+use std::error::Error;
+
+#[derive(FromPyObject)]
+struct Record {
+    id: u32,
+    content: String,
+}
+
+struct RecordProcessed {
+    id: u32,
+    n_m: u64,
+    n_f: u64,
+}
+
+fn clean_text(text: &str) -> String {
+    let pattern1 = Regex::new(r"([’'])(s|d|ll)").unwrap();
+    // Replace pattern with text
+    let matched = pattern1.replace_all(text, |capture: &Captures| match &capture[2] {
+        "s" => " is",
+        "d" => " had",
+        "ll" => " will",
+        _ => "<unk>",
+    });
+    // Remove non-alphabetic characters
+    let pattern2 = Regex::new(r"[^a-zA-Z\s]").unwrap();
+    let clean_text = pattern2.replace_all(&matched, "");
+    let result: String = clean_text.to_lowercase();
+    result
+}
+
+fn count_gendered_pronouns(text: &str) -> Result<(usize, usize), Box<dyn Error>> {
+    let clean_text = clean_text(text);
+    let tokens = clean_text.split_whitespace().collect::<Vec<&str>>();
+    let n_m = tokens
+        .par_iter()
+        .filter(|&x| *x == "he" || *x == "him" || *x == "his")
+        .count();
+    let n_f = tokens
+        .par_iter()
+        .filter(|&x| *x == "she" || *x == "her" || *x == "hers")
+        .count();
+    Ok((n_m, n_f))
+}
+
+#[pyfunction(signature = (records))]
+fn get_pronoun_counts(records: Vec<Record>) -> PyResult<Vec<RecordProcessed>> {
+    let mut result = vec![];
+    for record in records {
+        let (n_m, n_f) = count_gendered_pronouns(&record.content).unwrap();
+        let record_processed = RecordProcessed {
+            id: record.id,
+            n_m: n_m as u64,
+            n_f: n_f as u64,
+        };
+        result.push(record_processed);
+    }
+    Ok(result)
+}
+
+#[pymodule]
+fn pyo3_rayon(_py: Python, m: &PyModule) -> PyResult<()> {
+    m.add_function(wrap_pyfunction!(get_pronoun_counts, m)?)?;
+    Ok(())
+}