diff --git a/services/feature-flags/src/main.rs b/services/feature-flags/src/main.rs
--- a/services/feature-flags/src/main.rs
+++ b/services/feature-flags/src/main.rs
@@ -5,6 +5,7 @@
 pub mod config;
 pub mod constants;
 pub mod database;
+pub mod service;
 
 fn configure_logging() -> Result<()> {
   let filter = EnvFilter::builder()
diff --git a/services/feature-flags/src/service.rs b/services/feature-flags/src/service.rs
new file mode 100644
--- /dev/null
+++ b/services/feature-flags/src/service.rs
@@ -0,0 +1,56 @@
+use crate::database::{DatabaseClient, Error, FeatureConfig, Platform};
+use std::collections::HashSet;
+
+pub struct FeatureFlagsService {
+  _db: DatabaseClient,
+}
+
+impl FeatureFlagsService {
+  pub fn new(db_client: DatabaseClient) -> Self {
+    FeatureFlagsService { _db: db_client }
+  }
+
+  pub async fn _enabled_features_set(
+    db: &DatabaseClient,
+    platform: Platform,
+    code_version: i32,
+    is_staff: bool,
+  ) -> Result<HashSet<String>, Error> {
+    let features_config = db.get_features_configuration(platform).await?;
+    Ok(
+      features_config
+        .into_values()
+        .filter_map(|config| {
+          Self::_check_if_feature_is_enabled(code_version, is_staff, config)
+        })
+        .collect(),
+    )
+  }
+
+  fn _check_if_feature_is_enabled(
+    code_version: i32,
+    is_staff: bool,
+    feature_config: FeatureConfig,
+  ) -> Option<String> {
+    feature_config
+      .config
+      .keys()
+      .filter(|version| version.clone() <= &code_version)
+      .max()
+      .and_then(|version| feature_config.config.get(version))
+      .map(|config| {
+        if is_staff {
+          config.staff
+        } else {
+          config.non_staff
+        }
+      })
+      .and_then(|is_enabled| {
+        if is_enabled {
+          Some(feature_config.name)
+        } else {
+          None
+        }
+      })
+  }
+}