diff --git a/backend/src/main/java/de/hft/geotime/controllers/RecordController.java b/backend/src/main/java/de/hft/geotime/controllers/RecordController.java
new file mode 100644
index 0000000..88bfb28
--- /dev/null
+++ b/backend/src/main/java/de/hft/geotime/controllers/RecordController.java
@@ -0,0 +1,60 @@
+package de.hft.geotime.controllers;
+
+import de.hft.geotime.entities.RecordType;
+import de.hft.geotime.entities.TimeRecord;
+import de.hft.geotime.entities.TimetrackAccount;
+import de.hft.geotime.repositories.RecordRepository;
+import de.hft.geotime.repositories.TimetrackAccountRepository;
+import org.springframework.data.domain.Page;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+import org.springframework.security.core.Authentication;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestParam;
+import org.springframework.web.bind.annotation.RestController;
+
+import java.time.LocalDateTime;
+import java.util.Optional;
+
+@RestController
+public class RecordController {
+
+    private final RecordRepository recordRepository;
+    private final TimetrackAccountRepository accountRepository;
+
+    public RecordController(RecordRepository recordRepository, TimetrackAccountRepository accountRepository) {
+        this.recordRepository = recordRepository;
+        this.accountRepository = accountRepository;
+    }
+
+    @GetMapping("/track")
+    public ResponseEntity<TimeRecord> track(@RequestParam String account, Authentication authentication) {
+        if (account == null || account.isEmpty()) {
+            return new ResponseEntity<>(HttpStatus.BAD_REQUEST);
+        }
+
+        TimetrackAccount selectedAccount = accountRepository.findByUser_UsernameAndName(authentication.getName(), account);
+
+        if (selectedAccount == null) {
+            return new ResponseEntity<>(HttpStatus.NOT_FOUND);
+        }
+
+        Page<TimeRecord> entires = recordRepository.findAllByEnddateIsNull(null);
+        Optional<TimeRecord> collect = entires.stream()
+                .filter(timeRecord -> timeRecord.getAccount().equals(selectedAccount))
+                .findFirst();
+
+        if (collect.isPresent()) {
+            collect.get().setEnddate(LocalDateTime.now());
+            recordRepository.save(collect.get());
+            return new ResponseEntity<>(collect.get(), HttpStatus.OK);
+        } else {
+            TimeRecord newRecord = new TimeRecord();
+            newRecord.setType(RecordType.PAID);
+            newRecord.setStartdate(LocalDateTime.now());
+            newRecord.setAccount(accountRepository.findByUser_UsernameAndName(authentication.getName(), account));
+            recordRepository.save(newRecord);
+            return new ResponseEntity<>(newRecord, HttpStatus.CREATED);
+        }
+    }
+}
diff --git a/backend/src/main/java/de/hft/geotime/entities/TimeRecord.java b/backend/src/main/java/de/hft/geotime/entities/TimeRecord.java
index 8a54422..ef08904 100644
--- a/backend/src/main/java/de/hft/geotime/entities/TimeRecord.java
+++ b/backend/src/main/java/de/hft/geotime/entities/TimeRecord.java
@@ -5,8 +5,8 @@ import lombok.Data;
 import lombok.NoArgsConstructor;
 
 import javax.persistence.*;
-import java.time.Duration;
-import java.util.Date;
+import java.time.LocalDateTime;
+import java.time.temporal.ChronoUnit;
 
 @Data
 @NoArgsConstructor
@@ -17,11 +17,24 @@ public class TimeRecord {
     @Id
     @GeneratedValue(strategy = GenerationType.IDENTITY)
     private long id;
-    @OneToOne(fetch = FetchType.LAZY)
+
+    @ManyToOne
     private TimetrackAccount account;
-    private Date startdate;
-    private Date enddate;
-    private Duration time;
+
+    @Column(columnDefinition = "TIMESTAMP")
+    private LocalDateTime startdate;
+
+    @Column(columnDefinition = "TIMESTAMP")
+    private LocalDateTime enddate;
+
     private RecordType type;
 
+    public long getDuration() {
+        if (enddate == null) {
+            return 0;
+        } else {
+            return startdate.until(enddate, ChronoUnit.MINUTES);
+        }
+    }
+
 }
diff --git a/backend/src/main/java/de/hft/geotime/entities/TimetrackAccount.java b/backend/src/main/java/de/hft/geotime/entities/TimetrackAccount.java
index 9ee6191..bdec014 100644
--- a/backend/src/main/java/de/hft/geotime/entities/TimetrackAccount.java
+++ b/backend/src/main/java/de/hft/geotime/entities/TimetrackAccount.java
@@ -1,5 +1,6 @@
 package de.hft.geotime.entities;
 
+import com.fasterxml.jackson.annotation.JsonBackReference;
 import lombok.AllArgsConstructor;
 import lombok.Data;
 import lombok.NoArgsConstructor;
@@ -18,6 +19,7 @@ public class TimetrackAccount {
     private double revenue;
     private String name;
     private String description;
+
     @ManyToOne
     private TimetrackUser user;
 
diff --git a/backend/src/main/java/de/hft/geotime/entities/TimetrackUser.java b/backend/src/main/java/de/hft/geotime/entities/TimetrackUser.java
index d3b6b8c..46447cb 100644
--- a/backend/src/main/java/de/hft/geotime/entities/TimetrackUser.java
+++ b/backend/src/main/java/de/hft/geotime/entities/TimetrackUser.java
@@ -1,6 +1,7 @@
 package de.hft.geotime.entities;
 
 import com.fasterxml.jackson.annotation.JsonIgnore;
+import com.fasterxml.jackson.annotation.JsonManagedReference;
 import lombok.AllArgsConstructor;
 import lombok.Data;
 import lombok.NoArgsConstructor;
@@ -28,12 +29,9 @@ public class TimetrackUser {
 
     private String lastname;
 
-    @OneToOne(fetch = FetchType.EAGER)
+    @ManyToOne(fetch = FetchType.EAGER)
     private Role role;
 
-    @OneToMany(mappedBy = "user", fetch = FetchType.LAZY, cascade = CascadeType.ALL)
-    private List<TimetrackAccount> accounts;
-
     @ManyToOne
     private Location location;
 
diff --git a/backend/src/main/java/de/hft/geotime/entities/projections/RecordOverviewProjection.java b/backend/src/main/java/de/hft/geotime/entities/projections/RecordOverviewProjection.java
new file mode 100644
index 0000000..a92c091
--- /dev/null
+++ b/backend/src/main/java/de/hft/geotime/entities/projections/RecordOverviewProjection.java
@@ -0,0 +1,27 @@
+package de.hft.geotime.entities.projections;
+
+import de.hft.geotime.entities.TimeRecord;
+import org.springframework.beans.factory.annotation.Value;
+import org.springframework.data.rest.core.config.Projection;
+
+import java.time.LocalDateTime;
+
+@Projection(name = "overview", types = TimeRecord.class)
+public interface RecordOverviewProjection {
+
+    LocalDateTime getStartdate();
+
+    LocalDateTime getEnddate();
+
+    long getDuration();
+
+    @Value("#{target.type.name()}")
+    String getType();
+
+    @Value("#{target.account.name}")
+    String getAccount();
+
+    @Value("#{target.account.user.username}")
+    String getUsername();
+
+}
diff --git a/backend/src/main/java/de/hft/geotime/repositories/RecordRepository.java b/backend/src/main/java/de/hft/geotime/repositories/RecordRepository.java
index 765b6e9..71c04f6 100644
--- a/backend/src/main/java/de/hft/geotime/repositories/RecordRepository.java
+++ b/backend/src/main/java/de/hft/geotime/repositories/RecordRepository.java
@@ -1,11 +1,15 @@
 package de.hft.geotime.repositories;
 
 import de.hft.geotime.entities.TimeRecord;
-import org.springframework.data.repository.CrudRepository;
+import org.springframework.data.domain.Page;
+import org.springframework.data.domain.Pageable;
+import org.springframework.data.jpa.repository.Query;
 import org.springframework.data.repository.PagingAndSortingRepository;
 import org.springframework.data.rest.core.annotation.RepositoryRestResource;
+import org.springframework.data.rest.core.annotation.RestResource;
+import org.springframework.format.annotation.DateTimeFormat;
 
-import java.util.List;
+import java.time.LocalDateTime;
 
 @RepositoryRestResource(
         path = "records",
@@ -14,4 +18,37 @@ import java.util.List;
 )
 public interface RecordRepository extends PagingAndSortingRepository<TimeRecord, Long> {
 
+    @RestResource(rel = "allBetween", path = "allBetween")
+    Page<TimeRecord> findAllByStartdateBetween(
+            @DateTimeFormat(pattern = "yyyy-MM-dd'T'HH:mm:ss") LocalDateTime start,
+            @DateTimeFormat(pattern = "yyyy-MM-dd'T'HH:mm:ss") LocalDateTime end,
+            Pageable pageable
+    );
+
+    @RestResource(rel = "allBetweenAndUser", path = "allBetweenAndUser")
+    Page<TimeRecord> findAllByStartdateBetweenAndAccount_User_Username(
+            LocalDateTime start,
+            LocalDateTime end,
+            String username,
+            Pageable pageable
+    );
+
+    @RestResource(rel = "allForUser", path = "allForUser")
+    Page<TimeRecord> findAllByAccount_User_Username(String username, Pageable pageable);
+
+    @RestResource(rel = "allForUserAndAccount", path = "allForUserAndAccount")
+    Page<TimeRecord> findAllByAccount_User_UsernameAndAccount_Name(String username, String account, Pageable pageable);
+
+    @RestResource(rel = "allFrom", path = "allFrom")
+    Page<TimeRecord> findAllByStartdateGreaterThanEqual(
+            @DateTimeFormat(pattern = "yyyy-MM-dd'T'HH:mm:ss") LocalDateTime date,
+            Pageable pageable
+    );
+
+    @Query("SELECT record from TimeRecord record where record.account.user.username = :#{principal} AND record.startdate > (current_date-1)")
+    Page<TimeRecord> today(Pageable pageable);
+
+    @RestResource(rel = "openEntries", path = "openEntries")
+    Page<TimeRecord> findAllByEnddateIsNull(Pageable pageable);
+
 }
diff --git a/backend/src/main/java/de/hft/geotime/repositories/TimetrackAccountRepository.java b/backend/src/main/java/de/hft/geotime/repositories/TimetrackAccountRepository.java
index 81075a5..df69761 100644
--- a/backend/src/main/java/de/hft/geotime/repositories/TimetrackAccountRepository.java
+++ b/backend/src/main/java/de/hft/geotime/repositories/TimetrackAccountRepository.java
@@ -3,6 +3,7 @@ package de.hft.geotime.repositories;
 import de.hft.geotime.entities.TimetrackAccount;
 import org.springframework.data.repository.PagingAndSortingRepository;
 import org.springframework.data.rest.core.annotation.RepositoryRestResource;
+import org.springframework.data.rest.core.annotation.RestResource;
 
 @RepositoryRestResource(
         path = "accounts",
@@ -11,4 +12,7 @@ import org.springframework.data.rest.core.annotation.RepositoryRestResource;
 )
 public interface TimetrackAccountRepository extends PagingAndSortingRepository<TimetrackAccount, Long> {
 
+    @RestResource(rel = "findByUsernameAndName", path = "findByUsernameAndName")
+    TimetrackAccount findByUser_UsernameAndName(String username, String account);
+
 }
diff --git a/backend/src/main/java/de/hft/geotime/security/SecurityConfiguration.java b/backend/src/main/java/de/hft/geotime/security/SecurityConfiguration.java
new file mode 100644
index 0000000..4d86016
--- /dev/null
+++ b/backend/src/main/java/de/hft/geotime/security/SecurityConfiguration.java
@@ -0,0 +1,14 @@
+package de.hft.geotime.security;
+
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.data.spel.spi.EvaluationContextExtension;
+
+@Configuration
+class SecurityConfiguration {
+
+    @Bean
+    EvaluationContextExtension securityExtension() {
+        return new SecurityEvaluationContextExtension();
+    }
+}
\ No newline at end of file
diff --git a/backend/src/main/java/de/hft/geotime/security/SecurityEvaluationContextExtension.java b/backend/src/main/java/de/hft/geotime/security/SecurityEvaluationContextExtension.java
new file mode 100644
index 0000000..5e42052
--- /dev/null
+++ b/backend/src/main/java/de/hft/geotime/security/SecurityEvaluationContextExtension.java
@@ -0,0 +1,21 @@
+package de.hft.geotime.security;
+
+import org.springframework.data.spel.spi.EvaluationContextExtension;
+import org.springframework.security.access.expression.SecurityExpressionRoot;
+import org.springframework.security.core.Authentication;
+import org.springframework.security.core.context.SecurityContextHolder;
+
+public class SecurityEvaluationContextExtension implements EvaluationContextExtension {
+
+    @Override
+    public String getExtensionId() {
+        return "security";
+    }
+
+    @Override
+    public SecurityExpressionRoot getRootObject() {
+        Authentication authentication = SecurityContextHolder.getContext().getAuthentication();
+        return new SecurityExpressionRoot(authentication) {
+        };
+    }
+}
\ No newline at end of file
diff --git a/backend/src/main/resources/data.sql b/backend/src/main/resources/data.sql
index 3f9bdf3..84c0f16 100644
--- a/backend/src/main/resources/data.sql
+++ b/backend/src/main/resources/data.sql
@@ -20,8 +20,15 @@ INSERT INTO timetrack_user (id, firstname, lastname, password, username, role_id
   (3, 'Tim', 'Zieger' ,'$2y$10$pYGHZhoaelceImO7aIN4nOkWJBp.oqNGFYaRAonHkYF4u9ljqPelC', 'ziti', 1, 1),
   (4, 'Simon', 'Kellner' ,'$2y$10$Puzm/Nr/Dyq3nQxlkXGIfubS5JPtXJSOf2e6mrQ6HhVYQN9YiQQsC', 'kesi', 1, 1);
 
-INSERT INTO timetrack_account (description, `name`, revenue, user_id) VALUES
-  ('Gleitzeit Marcel', 'Primary Marcel', 16.0, 1),
-  ('Festgeld Marcel', 'Secondary Marcel', 25.0, 1);
+INSERT INTO timetrack_account (id, description, `name`, revenue, user_id) VALUES
+  (1, 'Gleitzeit Marcel', 'Primary', 16.0, 1),
+  (2, 'Festgeld Marcel', 'Secondary', 25.0, 1),
+  (3, 'Festgeld Tim', 'Primary', 25.0, 3);
+
+INSERT INTO time_record (id, enddate, startdate, `type`, account_id) VALUES
+  (1, '2020-05-10 16:00:00', '2020-05-10 12:00:00', 0, 1),
+  (2, '2020-05-09 16:00:00', '2020-05-09 12:00:00', 1, 1),
+  (3, '2020-05-20 16:00:00', '2020-05-20 00:00:00', 1, 2),
+  (4, '2020-05-11 16:00:00', '2020-05-11 12:00:00', 1, 3);
 
 SET FOREIGN_KEY_CHECKS=1;
\ No newline at end of file