diff --git a/packages/concordia-app/src/components/PostCreate/index.jsx b/packages/concordia-app/src/components/PostCreate/index.jsx
index 124696c..0047247 100644
--- a/packages/concordia-app/src/components/PostCreate/index.jsx
+++ b/packages/concordia-app/src/components/PostCreate/index.jsx
@@ -8,20 +8,31 @@ import PropTypes from 'prop-types';
 import { useTranslation } from 'react-i18next';
 import { useDispatch, useSelector } from 'react-redux';
 import determineKVAddress from '../../utils/orbitUtils';
-import { USER_DATABASE } from '../../constants/OrbitDatabases';
+import { POSTS_DATABASE, USER_DATABASE } from '../../constants/OrbitDatabases';
 import { FETCH_USER_DATABASE } from '../../redux/actions/peerDbReplicationActions';
 import { USER_PROFILE_PICTURE } from '../../constants/UserDatabaseKeys';
-import { breeze } from '../../redux/store';
+import { breeze, drizzle } from '../../redux/store';
 import './styles.css';
+import { TRANSACTION_ERROR, TRANSACTION_SUCCESS } from '../../constants/TransactionStatus';
+import { POST_CONTENT, POST_SUBJECT } from '../../constants/PostsDatabaseKeys';
 
+const { contracts: { Forum: { methods: { createPost } } } } = drizzle;
 const { orbit } = breeze;
 
 const PostCreate = (props) => {
-  const { id: postId, initialPostSubject } = props;
+  const {
+    topicId, postIndexInTopic, initialPostSubject, account,
+  } = props;
+  const transactionStack = useSelector((state) => state.transactionStack);
+  const transactions = useSelector((state) => state.transactions);
   const [postSubject, setPostSubject] = useState(initialPostSubject);
   const [postContent, setPostContent] = useState('');
   const [userProfilePictureUrl, setUserProfilePictureUrl] = useState();
+  const [postSubjectInputEmptySubmit, setPostSubjectInputEmptySubmit] = useState(false);
+  const [postContentInputEmptySubmit, setPostContentInputEmptySubmit] = useState(false);
+  const [createPostCacheSendStackId, setCreatePostCacheSendStackId] = useState('');
   const [posting, setPosting] = useState(false);
+  const [storingPost, setStoringPost] = useState(false);
   const userAddress = useSelector((state) => state.user.address);
   const users = useSelector((state) => state.orbitData.users);
   const dispatch = useDispatch();
@@ -68,13 +79,58 @@ const PostCreate = (props) => {
     }
   }, [posting]);
 
+  useEffect(() => {
+    if (posting && !storingPost && transactionStack && transactionStack[createPostCacheSendStackId]
+            && transactions[transactionStack[createPostCacheSendStackId]]) {
+      if (transactions[transactionStack[createPostCacheSendStackId]].status === TRANSACTION_ERROR) {
+        setPosting(false);
+      } else if (transactions[transactionStack[createPostCacheSendStackId]].status === TRANSACTION_SUCCESS) {
+        const {
+          receipt: { events: { PostCreated: { returnValues: { postID: contractPostId } } } },
+        } = transactions[transactionStack[createPostCacheSendStackId]];
+
+        const { stores } = orbit;
+        const postsDb = Object.values(stores).find((store) => store.dbname === POSTS_DATABASE);
+
+        postsDb
+          .put(contractPostId, {
+            [POST_SUBJECT]: postSubject,
+            [POST_CONTENT]: postContent,
+          }, { pin: true })
+          .then(() => {
+            setPostSubject(initialPostSubject);
+            setPostContent('');
+            setPosting(false);
+            setPostSubjectInputEmptySubmit(false);
+            setPostContentInputEmptySubmit(false);
+            setCreatePostCacheSendStackId('');
+          })
+          .catch((reason) => {
+            console.log(reason);
+          });
+
+        setStoringPost(true);
+      }
+    }
+  }, [
+    createPostCacheSendStackId, initialPostSubject, postContent, postSubject, posting, storingPost, transactionStack,
+    transactions,
+  ]);
+
   const savePost = useCallback(() => {
-    if (postSubject === '' || postContent === '') {
+    if (postSubject === '') {
+      setPostSubjectInputEmptySubmit(true);
+      return;
+    }
+
+    if (postContent === '') {
+      setPostContentInputEmptySubmit(true);
       return;
     }
 
     setPosting(true);
-  }, [postContent, postSubject]);
+    setCreatePostCacheSendStackId(createPost.cacheSend(...[topicId], { from: account }));
+  }, [account, postContent, postSubject, topicId]);
 
   return (
       <Feed>
@@ -93,7 +149,6 @@ const PostCreate = (props) => {
                           size="big"
                           inverted
                           color="black"
-                          verticalAlign="middle"
                         />
                     )}
               </Feed.Label>
@@ -105,11 +160,12 @@ const PostCreate = (props) => {
                             name="postSubject"
                             className="subject-input"
                             size="mini"
+                            error={postSubjectInputEmptySubmit}
                             value={postSubject}
                             onChange={handleInputChange}
                           />
                           <span className="post-summary-meta-index">
-                              {t('post.list.row.post.id', { id: postId })}
+                              {t('post.list.row.post.id', { id: postIndexInTopic })}
                           </span>
                       </div>
                   </Feed.Summary>
@@ -121,6 +177,7 @@ const PostCreate = (props) => {
                             className="content-input"
                             size="mini"
                             rows={4}
+                            error={postContentInputEmptySubmit}
                             value={postContent}
                             onChange={handleInputChange}
                           />
@@ -133,8 +190,8 @@ const PostCreate = (props) => {
                             animated
                             type="button"
                             color="green"
-                            disabled={posting}
-                            onClick={savePost || postSubject === '' || postContent === ''}
+                            disabled={posting || postSubject === '' || postContent === ''}
+                            onClick={savePost}
                           >
                               <Button.Content visible>
                                   {t('post.create.form.send.button')}
@@ -152,7 +209,8 @@ const PostCreate = (props) => {
 };
 
 PostCreate.propTypes = {
-  id: PropTypes.number.isRequired,
+  topicId: PropTypes.number.isRequired,
+  postIndexInTopic: PropTypes.number.isRequired,
   initialPostSubject: PropTypes.string.isRequired,
 };
 
diff --git a/packages/concordia-app/src/components/PostList/PostListRow/index.jsx b/packages/concordia-app/src/components/PostList/PostListRow/index.jsx
index af1a69a..085c217 100644
--- a/packages/concordia-app/src/components/PostList/PostListRow/index.jsx
+++ b/packages/concordia-app/src/components/PostList/PostListRow/index.jsx
@@ -7,8 +7,8 @@ import {
 import PropTypes from 'prop-types';
 import { useTranslation } from 'react-i18next';
 import moment from 'moment';
-import { useHistory } from 'react-router';
 import { useDispatch, useSelector } from 'react-redux';
+import { Link } from 'react-router-dom';
 import { FETCH_USER_DATABASE } from '../../../redux/actions/peerDbReplicationActions';
 import { breeze } from '../../../redux/store';
 import './styles.css';
@@ -21,7 +21,9 @@ import { FORUM_CONTRACT } from '../../../constants/ContractNames';
 const { orbit } = breeze;
 
 const PostListRow = (props) => {
-  const { id: postId, postCallHash, loading } = props;
+  const {
+    id: postId, postIndexInTopic, postCallHash, loading,
+  } = props;
   const getPostResults = useSelector((state) => state.contracts[FORUM_CONTRACT].getPost);
   const [postAuthorAddress, setPostAuthorAddress] = useState(null);
   const [postAuthor, setPostAuthor] = useState(null);
@@ -33,7 +35,6 @@ const PostListRow = (props) => {
   const posts = useSelector((state) => state.orbitData.posts);
   const users = useSelector((state) => state.orbitData.users);
   const dispatch = useDispatch();
-  const history = useHistory();
   const { t } = useTranslation();
 
   useEffect(() => {
@@ -89,25 +90,38 @@ const PostListRow = (props) => {
     }
   }, [postAuthorAddress, users]);
 
+  const authorAvatar = useMemo(() => (postAuthorMeta !== null && postAuthorMeta[USER_PROFILE_PICTURE]
+    ? (
+        <Image
+          avatar
+          src={postAuthorMeta[USER_PROFILE_PICTURE]}
+        />
+    )
+    : (
+        <Icon
+          name="user circle"
+          size="big"
+          inverted
+          color="black"
+        />
+    )), [postAuthorMeta]);
+
+  const authorAvatarLink = useMemo(() => {
+    if (postAuthorAddress) {
+      return (
+          <Link to={`/users/${postAuthorAddress}`}>
+              {authorAvatar}
+          </Link>
+      );
+    }
+
+    return authorAvatar;
+  }, [authorAvatar, postAuthorAddress]);
+
   return useMemo(() => (
       <Dimmer.Dimmable as={Feed.Event} blurring dimmed={loading}>
           <Feed.Label className="post-profile-picture">
-              {postAuthorMeta !== null && postAuthorMeta[USER_PROFILE_PICTURE]
-                ? (
-                    <Image
-                      avatar
-                      src={postAuthorMeta[USER_PROFILE_PICTURE]}
-                    />
-                )
-                : (
-                    <Icon
-                      name="user circle"
-                      size="big"
-                      inverted
-                      color="black"
-                      verticalAlign="middle"
-                    />
-                )}
+              {authorAvatarLink}
           </Feed.Label>
           <Feed.Content>
               <Feed.Summary>
@@ -116,15 +130,15 @@ const PostListRow = (props) => {
                         ? postSubject
                         : <Placeholder><Placeholder.Line length="very long" /></Placeholder>}
                       <span className="post-summary-meta-index">
-                          {t('post.list.row.post.id', { id: postId })}
+                          {t('post.list.row.post.id', { id: postIndexInTopic })}
                       </span>
                   </div>
-                  {postAuthor !== null && timeAgo !== null
+                  {postAuthor !== null && setPostAuthorAddress !== null && timeAgo !== null
                     ? (
                         <>
                             {t('post.list.row.author.pre')}
                             &nbsp;
-                            <Feed.User>{postAuthor}</Feed.User>
+                            <Feed.User as={Link} to={`/users/${postAuthorAddress}`}>{postAuthor}</Feed.User>
                             <Feed.Date className="post-summary-meta-date">{timeAgo}</Feed.Date>
                         </>
                     )
@@ -135,7 +149,9 @@ const PostListRow = (props) => {
               </Feed.Extra>
           </Feed.Content>
       </Dimmer.Dimmable>
-  ), [loading, postAuthor, postAuthorMeta, postId, postContent, postSubject, t, timeAgo]);
+  ), [
+    authorAvatarLink, loading, postAuthor, postAuthorAddress, postContent, postIndexInTopic, postSubject, t, timeAgo,
+  ]);
 };
 
 PostListRow.defaultProps = {
@@ -144,6 +160,7 @@ PostListRow.defaultProps = {
 
 PostListRow.propTypes = {
   id: PropTypes.number.isRequired,
+  postIndexInTopic: PropTypes.number.isRequired,
   postCallHash: PropTypes.string,
   loading: PropTypes.bool,
 };
diff --git a/packages/concordia-app/src/components/PostList/index.jsx b/packages/concordia-app/src/components/PostList/index.jsx
index c5c8130..68759b2 100644
--- a/packages/concordia-app/src/components/PostList/index.jsx
+++ b/packages/concordia-app/src/components/PostList/index.jsx
@@ -41,12 +41,13 @@ const PostList = (props) => {
       return null;
     }
     return postIds
-      .map((postId) => {
+      .map((postId, index) => {
         const postHash = getPostCallHashes.find((getPostCallHash) => getPostCallHash.id === postId);
 
         return (
             <PostListRow
               id={postId}
+              postIndexInTopic={index + 1}
               key={postId}
               postCallHash={postHash && postHash.hash}
               loading={postHash === undefined}
@@ -56,7 +57,7 @@ const PostList = (props) => {
   }, [getPostCallHashes, loading, postIds]);
 
   return (
-      <Dimmer.Dimmable as={Feed} blurring dimmed={loading} selection divided id="post-list" size="big">
+      <Dimmer.Dimmable as={Feed} blurring dimmed={loading} id="post-list" size="large">
           <Loader active={loading} />
           {posts}
       </Dimmer.Dimmable>
diff --git a/packages/concordia-app/src/components/TopicList/TopicListRow/index.jsx b/packages/concordia-app/src/components/TopicList/TopicListRow/index.jsx
index 05974ee..4d25f91 100644
--- a/packages/concordia-app/src/components/TopicList/TopicListRow/index.jsx
+++ b/packages/concordia-app/src/components/TopicList/TopicListRow/index.jsx
@@ -9,6 +9,7 @@ import { useTranslation } from 'react-i18next';
 import moment from 'moment';
 import { useHistory } from 'react-router';
 import { useDispatch, useSelector } from 'react-redux';
+import { Link } from 'react-router-dom';
 import { FETCH_USER_DATABASE } from '../../../redux/actions/peerDbReplicationActions';
 import { breeze } from '../../../redux/store';
 import './styles.css';
@@ -89,6 +90,40 @@ const TopicListRow = (props) => {
     }
   }, [topicAuthorAddress, users]);
 
+  const stopClickPropagation = (event) => {
+    event.stopPropagation();
+  };
+
+  const authorAvatar = useMemo(() => (topicAuthorMeta !== null && topicAuthorMeta[USER_PROFILE_PICTURE]
+    ? (
+        <Image
+          className="profile-picture"
+          avatar
+          src={topicAuthorMeta[USER_PROFILE_PICTURE]}
+        />
+    )
+    : (
+        <List.Icon
+          name="user circle"
+          size="big"
+          inverted
+          color="black"
+          verticalAlign="middle"
+        />
+    )), [topicAuthorMeta]);
+
+  const authorAvatarLink = useMemo(() => {
+    if (topicAuthorAddress) {
+      return (
+          <Link to={`/users/${topicAuthorAddress}`} onClick={stopClickPropagation}>
+              {authorAvatar}
+          </Link>
+      );
+    }
+
+    return authorAvatar;
+  }, [authorAvatar, topicAuthorAddress]);
+
   return useMemo(() => {
     const handleTopicClick = () => {
       history.push(`/topics/${topicId}`);
@@ -96,23 +131,7 @@ const TopicListRow = (props) => {
 
     return (
         <Dimmer.Dimmable as={List.Item} onClick={handleTopicClick} blurring dimmed={loading} className="list-item">
-            {topicAuthorMeta !== null && topicAuthorMeta[USER_PROFILE_PICTURE]
-              ? (
-                  <Image
-                    className="profile-picture"
-                    avatar
-                    src={topicAuthorMeta[USER_PROFILE_PICTURE]}
-                  />
-              )
-              : (
-                  <List.Icon
-                    name="user circle"
-                    size="big"
-                    inverted
-                    color="black"
-                    verticalAlign="middle"
-                  />
-              )}
+            {authorAvatarLink}
             <List.Content className="list-content">
                 <List.Header>
                     <Grid>
@@ -149,7 +168,7 @@ const TopicListRow = (props) => {
             </List.Content>
         </Dimmer.Dimmable>
     );
-  }, [history, loading, numberOfReplies, t, timeAgo, topicAuthor, topicAuthorMeta, topicId, topicSubject]);
+  }, [authorAvatarLink, history, loading, numberOfReplies, t, timeAgo, topicAuthor, topicId, topicSubject]);
 };
 
 TopicListRow.defaultProps = {
diff --git a/packages/concordia-app/src/options/web3Options.js b/packages/concordia-app/src/options/web3Options.js
index 49d20fa..1957de8 100644
--- a/packages/concordia-app/src/options/web3Options.js
+++ b/packages/concordia-app/src/options/web3Options.js
@@ -3,7 +3,9 @@ import Web3 from 'web3';
 const { WEB3_URL, WEB3_PORT } = process.env;
 
 // We need fallback ws://127.0.0.1:8545 because drizzle has not the patched web3 we use here
-const web3 = (WEB3_URL && WEB3_PORT) ? `ws://${WEB3_URL}:${WEB3_PORT}` : new Web3(Web3.givenProvider || new Web3.providers.WebsocketProvider('ws://127.0.0.1:8545'));
+const web3 = (WEB3_URL && WEB3_PORT)
+  ? `ws://${WEB3_URL}:${WEB3_PORT}`
+  : new Web3(Web3.givenProvider || new Web3.providers.WebsocketProvider('ws://127.0.0.1:8545'));
 
 const web3Options = {
   web3,
diff --git a/packages/concordia-app/src/redux/sagas/peerDbReplicationSaga.js b/packages/concordia-app/src/redux/sagas/peerDbReplicationSaga.js
index cd54388..5e30042 100644
--- a/packages/concordia-app/src/redux/sagas/peerDbReplicationSaga.js
+++ b/packages/concordia-app/src/redux/sagas/peerDbReplicationSaga.js
@@ -31,7 +31,7 @@ function* updateReduxState({ database }) {
 
   if (database.dbname === USER_DATABASE) {
     const oldUsersUnchanged = users
-      .filter((user) => !database.id !== user.id);
+      .filter((user) => database.id !== user.id);
 
     yield put({
       type: UPDATE_ORBIT_DATA,
diff --git a/packages/concordia-app/src/views/Topic/TopicView/index.jsx b/packages/concordia-app/src/views/Topic/TopicView/index.jsx
index 5f747c2..c3fa8cf 100644
--- a/packages/concordia-app/src/views/Topic/TopicView/index.jsx
+++ b/packages/concordia-app/src/views/Topic/TopicView/index.jsx
@@ -5,6 +5,8 @@ import {
   Container, Dimmer, Icon, Image, Placeholder, Step,
 } from 'semantic-ui-react';
 import moment from 'moment';
+import { Link } from 'react-router-dom';
+import { useHistory } from 'react-router';
 import { breeze, drizzle } from '../../../redux/store';
 import { FETCH_USER_DATABASE } from '../../../redux/actions/peerDbReplicationActions';
 import './styles.css';
@@ -37,7 +39,7 @@ const TopicView = (props) => {
   const [timestamp, setTimestamp] = useState(initialTimestamp || null);
   const [postIds, setPostIds] = useState(initialPostIds || null);
   const [topicSubject, setTopicSubject] = useState(null);
-
+  const history = useHistory();
   const dispatch = useDispatch();
 
   useEffect(() => {
@@ -55,6 +57,11 @@ const TopicView = (props) => {
 
   useEffect(() => {
     if (getTopicCallHash && getTopicResults && getTopicResults[getTopicCallHash]) {
+      if (getTopicResults[getTopicCallHash].value == null) {
+        history.push('/');
+        return;
+      }
+
       setTopicAuthorAddress(getTopicResults[getTopicCallHash].value[0]);
       setTopicAuthor(getTopicResults[getTopicCallHash].value[1]);
       setTimestamp(getTopicResults[getTopicCallHash].value[2]);
@@ -72,7 +79,7 @@ const TopicView = (props) => {
         });
       }
     }
-  }, [dispatch, getTopicCallHash, getTopicResults, topicId, topics, userAddress]);
+  }, [dispatch, getTopicCallHash, getTopicResults, history, topicId, topics, userAddress]);
 
   useEffect(() => {
     if (topicAuthorAddress !== null) {
@@ -115,28 +122,32 @@ const TopicView = (props) => {
           >
               <Step.Group fluid>
                   <Step key="topic-header-step-user">
-                      {topicAuthorMeta !== null && topicAuthorMeta[USER_PROFILE_PICTURE]
-                        ? (
-                            <Image
-                              avatar
-                              src={topicAuthorMeta[USER_PROFILE_PICTURE]}
-                            />
-                        )
-                        : (
-                            <Icon
-                              name="user circle"
-                              size="big"
-                              inverted
-                              color="black"
-                            />
-                        )}
+                      <Link to={`/users/${topicAuthorAddress}`}>
+                          {topicAuthorMeta !== null && topicAuthorMeta[USER_PROFILE_PICTURE]
+                            ? (
+                                <Image
+                                  avatar
+                                  src={topicAuthorMeta[USER_PROFILE_PICTURE]}
+                                />
+                            )
+                            : (
+                                <Icon
+                                  name="user circle"
+                                  size="big"
+                                  inverted
+                                  color="black"
+                                />
+                            )}
+                      </Link>
                       <Step.Content>
                           <Step.Title>
-                              {topicAuthor || (
-                                  <Placeholder id="author-placeholder" inverted>
-                                      <Placeholder.Line length="full" />
-                                  </Placeholder>
-                              )}
+                              <Link to={`/users/${topicAuthorAddress}`}>
+                                  {topicAuthor || (
+                                      <Placeholder id="author-placeholder" inverted>
+                                          <Placeholder.Line length="full" />
+                                      </Placeholder>
+                                  )}
+                              </Link>
                           </Step.Title>
                       </Step.Content>
                   </Step>
@@ -165,7 +176,8 @@ const TopicView = (props) => {
           <PostList postIds={postIds || []} loading={postIds === null} />
           {topicSubject !== null && postIds !== null && (
               <PostCreate
-                id={postIds.length}
+                topicId={topicId}
+                postIndexInTopic={postIds.length + 1}
                 initialPostSubject={topicSubject}
               />
           )}