diff --git a/services/blob/src/constants.rs b/services/blob/src/constants.rs
--- a/services/blob/src/constants.rs
+++ b/services/blob/src/constants.rs
@@ -1,7 +1,25 @@
-pub const GRPC_SERVER_DEFAULT_PORT: u64 = 50051;
+// Assorted constants
 
+pub const GRPC_SERVER_DEFAULT_PORT: u64 = 50051;
 pub const AWS_REGION: &str = "us-east-2";
-
 pub const LOCALSTACK_URL: &str = "http://localhost:4566";
 
+// DynamoDB constants
+
+pub const BLOB_TABLE_NAME: &str = "blob-service-blob";
+pub const BLOB_TABLE_BLOB_HASH_FIELD: &str = "blobHash";
+pub const BLOB_TABLE_S3_PATH_FIELD: &str = "s3Path";
+pub const BLOB_TABLE_CREATED_FIELD: &str = "created";
+
+pub const BLOB_REVERSE_INDEX_TABLE_NAME: &str = "blob-service-reverse-index";
+pub const BLOB_REVERSE_INDEX_TABLE_HOLDER_FIELD: &str = "holder";
+pub const BLOB_REVERSE_INDEX_TABLE_BLOB_HASH_FIELD: &str = "blobHash";
+pub const BLOB_REVERSE_INDEX_TABLE_HASH_INDEX_NAME: &str = "blobHash-index";
+
+// Environment variables
+
 pub const SANDBOX_ENV_VAR: &str = "COMM_SERVICES_SANDBOX";
+
+// S3 constants
+
+pub const BLOB_S3_BUCKET_NAME: &str = "commapp-blob";
diff --git a/services/blob/src/main.rs b/services/blob/src/main.rs
--- a/services/blob/src/main.rs
+++ b/services/blob/src/main.rs
@@ -6,11 +6,12 @@
 
 use anyhow::Result;
 use aws_sdk_dynamodb::{Endpoint, Region};
+use database::DatabaseClient;
 use service::{blob::blob_service_server::BlobServiceServer, MyBlobService};
 use std::net::SocketAddr;
 use tonic::transport::{Server, Uri};
 
-async fn _get_aws_config() -> aws_types::SdkConfig {
+async fn get_aws_config() -> aws_types::SdkConfig {
   let mut config_builder =
     aws_config::from_env().region(Region::new(constants::AWS_REGION));
 
@@ -23,10 +24,13 @@
   return config_builder.load().await;
 }
 
-async fn run_grpc_server() -> Result<()> {
+async fn run_grpc_server(
+  db_client: DatabaseClient,
+  s3_client: aws_sdk_s3::Client,
+) -> Result<()> {
   let addr: SocketAddr =
     format!("[::]:{}", constants::GRPC_SERVER_DEFAULT_PORT).parse()?;
-  let blob_service = MyBlobService::default();
+  let blob_service = MyBlobService::new(db_client, s3_client);
 
   println!("Starting gRPC server at port {}", addr.port());
   Server::builder()
@@ -39,5 +43,9 @@
 
 #[tokio::main]
 async fn main() -> Result<()> {
-  run_grpc_server().await
+  let aws_config = get_aws_config().await;
+  let db = database::DatabaseClient::new(&aws_config);
+  let s3 = aws_sdk_s3::Client::new(&aws_config);
+
+  run_grpc_server(db, s3).await
 }
diff --git a/services/blob/src/service.rs b/services/blob/src/service.rs
--- a/services/blob/src/service.rs
+++ b/services/blob/src/service.rs
@@ -1,15 +1,28 @@
 use anyhow::Result;
 use blob::blob_service_server::BlobService;
-use std::pin::Pin;
+use std::{pin::Pin, sync::Arc};
 use tokio_stream::Stream;
 use tonic::{Request, Response, Status};
 
+use crate::database::DatabaseClient;
+
 pub mod blob {
   tonic::include_proto!("blob");
 }
 
-#[derive(Default)]
-pub struct MyBlobService {}
+pub struct MyBlobService {
+  db: DatabaseClient,
+  s3: Arc<aws_sdk_s3::Client>,
+}
+
+impl MyBlobService {
+  pub fn new(db_client: DatabaseClient, s3_client: aws_sdk_s3::Client) -> Self {
+    MyBlobService {
+      db: db_client,
+      s3: Arc::new(s3_client),
+    }
+  }
+}
 
 // gRPC implementation
 #[tonic::async_trait]