diff --git a/pom.xml b/pom.xml
index 17fd7ad..351e267 100644
--- a/pom.xml
+++ b/pom.xml
@@ -31,6 +31,10 @@
 			<groupId>org.springframework.boot</groupId>
 			<artifactId>spring-boot-starter-web</artifactId>
 		</dependency>
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-starter-data-jpa</artifactId>
+		</dependency>
 
 		<dependency>
 			<groupId>org.flywaydb</groupId>
@@ -49,6 +53,25 @@
 			<artifactId>spring-boot-starter-test</artifactId>
 			<scope>test</scope>
 		</dependency>
+
+		<dependency>
+			<groupId>org.modelmapper</groupId>
+			<artifactId>modelmapper</artifactId>
+			<version>3.1.1</version>
+		</dependency>
+
+		<dependency>
+			<groupId>org.projectlombok</groupId>
+			<artifactId>lombok</artifactId>
+			<version>1.18.28</version>
+			<scope>provided</scope>
+		</dependency>
+
+		<dependency>
+			<groupId>org.springframework.boot</groupId>
+			<artifactId>spring-boot-devtools</artifactId>
+		</dependency>
+
 	</dependencies>
 
 	<build>
diff --git a/src/main/java/com/zoomcare/candidatechallenge/config/CandidateChallengeConfig.java b/src/main/java/com/zoomcare/candidatechallenge/config/CandidateChallengeConfig.java
new file mode 100644
index 0000000..5369d8b
--- /dev/null
+++ b/src/main/java/com/zoomcare/candidatechallenge/config/CandidateChallengeConfig.java
@@ -0,0 +1,20 @@
+package com.zoomcare.candidatechallenge.config;
+
+import com.zoomcare.candidatechallenge.repository.EmployeeRepository;
+import com.zoomcare.candidatechallenge.service.EmployeeService;
+import org.modelmapper.ModelMapper;
+import org.springframework.context.annotation.Bean;
+import org.springframework.context.annotation.Configuration;
+
+@Configuration
+public class CandidateChallengeConfig {
+    @Bean
+    public ModelMapper modelMapper() {
+        return new ModelMapper();
+    }
+
+    @Bean
+    public EmployeeService employeeService(ModelMapper modelMapper, EmployeeRepository employeeRepository) {
+        return new EmployeeService(employeeRepository, modelMapper);
+    }
+}
diff --git a/src/main/java/com/zoomcare/candidatechallenge/controller/EmployeeController.java b/src/main/java/com/zoomcare/candidatechallenge/controller/EmployeeController.java
new file mode 100644
index 0000000..04b26bc
--- /dev/null
+++ b/src/main/java/com/zoomcare/candidatechallenge/controller/EmployeeController.java
@@ -0,0 +1,37 @@
+package com.zoomcare.candidatechallenge.controller;
+
+import com.zoomcare.candidatechallenge.dto.EmployeeDTO;
+import com.zoomcare.candidatechallenge.service.EmployeeService;
+import java.util.List;
+import java.util.Optional;
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.http.ResponseEntity;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.PathVariable;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+@RestController
+@RequestMapping("/api/employees")
+public class EmployeeController {
+    @Autowired
+    private EmployeeService employeeService;
+
+    @GetMapping("/{id}")
+    ResponseEntity<EmployeeDTO> getById(@PathVariable Long id) {
+        Optional<EmployeeDTO> employeeDTO = employeeService.findById(id);
+        if (!employeeDTO.isPresent()) {
+            return ResponseEntity.notFound().build();
+        }
+        return ResponseEntity.ok(employeeDTO.get());
+    }
+
+    @GetMapping("/topLevel")
+    ResponseEntity<List<EmployeeDTO>> getTopLevelEmployees() {
+        List<EmployeeDTO> employeeDTOs = employeeService.getTopLevelEmployee();
+        if (employeeDTOs.isEmpty()) {
+            return ResponseEntity.notFound().build();
+        }
+        return ResponseEntity.ok(employeeDTOs);
+    }
+}
diff --git a/src/main/java/com/zoomcare/candidatechallenge/dto/EmployeeDTO.java b/src/main/java/com/zoomcare/candidatechallenge/dto/EmployeeDTO.java
new file mode 100644
index 0000000..3eeaf1a
--- /dev/null
+++ b/src/main/java/com/zoomcare/candidatechallenge/dto/EmployeeDTO.java
@@ -0,0 +1,18 @@
+package com.zoomcare.candidatechallenge.dto;
+
+import java.util.List;
+import lombok.AllArgsConstructor;
+import lombok.Builder;
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@AllArgsConstructor
+@NoArgsConstructor
+@Builder
+public class EmployeeDTO {
+    private Long id;
+    private Long supervisorId;
+    private List<PropertyDTO> properties;
+    private List<EmployeeDTO> directReports;
+}
diff --git a/src/main/java/com/zoomcare/candidatechallenge/dto/PropertyDTO.java b/src/main/java/com/zoomcare/candidatechallenge/dto/PropertyDTO.java
new file mode 100644
index 0000000..7dfbc00
--- /dev/null
+++ b/src/main/java/com/zoomcare/candidatechallenge/dto/PropertyDTO.java
@@ -0,0 +1,11 @@
+package com.zoomcare.candidatechallenge.dto;
+
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@NoArgsConstructor
+public class PropertyDTO {
+    private PropertyPKDTO id;
+    private String value;
+}
diff --git a/src/main/java/com/zoomcare/candidatechallenge/dto/PropertyPKDTO.java b/src/main/java/com/zoomcare/candidatechallenge/dto/PropertyPKDTO.java
new file mode 100644
index 0000000..fcda728
--- /dev/null
+++ b/src/main/java/com/zoomcare/candidatechallenge/dto/PropertyPKDTO.java
@@ -0,0 +1,10 @@
+package com.zoomcare.candidatechallenge.dto;
+
+import lombok.Data;
+import lombok.NoArgsConstructor;
+
+@Data
+@NoArgsConstructor
+public class PropertyPKDTO {
+    private String key;
+}
diff --git a/src/main/java/com/zoomcare/candidatechallenge/model/Employee.java b/src/main/java/com/zoomcare/candidatechallenge/model/Employee.java
new file mode 100644
index 0000000..efa3a91
--- /dev/null
+++ b/src/main/java/com/zoomcare/candidatechallenge/model/Employee.java
@@ -0,0 +1,59 @@
+package com.zoomcare.candidatechallenge.model;
+
+import java.io.Serializable;
+import java.util.List;
+import javax.persistence.Column;
+import javax.persistence.Entity;
+import javax.persistence.FetchType;
+import javax.persistence.GeneratedValue;
+import javax.persistence.Id;
+import javax.persistence.JoinColumn;
+import javax.persistence.OneToMany;
+import lombok.Builder;
+
+@Builder
+@Entity
+public class Employee implements Serializable {
+    @Id
+    @GeneratedValue
+    private Long id;
+
+    @Column(name = "supervisor_id")
+    private Long supervisorId;
+
+    @OneToMany(fetch = FetchType.LAZY)
+    @JoinColumn(name = "employee_id")
+    private List<Property> properties;
+
+    @OneToMany(fetch = FetchType.LAZY)
+    @JoinColumn(name = "supervisor_id")
+    private List<Employee>  directReports;
+
+    public Long getSupervisorId() {
+        return supervisorId;
+    }
+
+    public void setSupervisorId(Long supervisorId) {
+        this.supervisorId = supervisorId;
+    }
+
+    public List<Employee> getDirectReports() {
+        return directReports;
+    }
+
+    public void setDirectReports(List<Employee> directReports) {
+        this.directReports = directReports;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public List<Property> getProperties() {
+        return properties;
+    }
+
+    public void setProperties(List<Property> properties) {
+        this.properties = properties;
+    }
+}
diff --git a/src/main/java/com/zoomcare/candidatechallenge/model/Property.java b/src/main/java/com/zoomcare/candidatechallenge/model/Property.java
new file mode 100644
index 0000000..d93a408
--- /dev/null
+++ b/src/main/java/com/zoomcare/candidatechallenge/model/Property.java
@@ -0,0 +1,30 @@
+package com.zoomcare.candidatechallenge.model;
+
+import java.io.Serializable;
+import javax.persistence.EmbeddedId;
+import javax.persistence.Entity;
+import lombok.Builder;
+
+@Entity
+@Builder
+public class Property implements Serializable {
+    @EmbeddedId
+    private PropertyPK id;
+    private String value;
+
+    public PropertyPK getId() {
+        return id;
+    }
+
+    public void setId(PropertyPK id) {
+        this.id = id;
+    }
+
+    public String getValue() {
+        return value;
+    }
+
+    public void setValue(String value) {
+        this.value = value;
+    }
+}
diff --git a/src/main/java/com/zoomcare/candidatechallenge/model/PropertyPK.java b/src/main/java/com/zoomcare/candidatechallenge/model/PropertyPK.java
new file mode 100644
index 0000000..db193e8
--- /dev/null
+++ b/src/main/java/com/zoomcare/candidatechallenge/model/PropertyPK.java
@@ -0,0 +1,32 @@
+package com.zoomcare.candidatechallenge.model;
+
+import java.io.Serializable;
+import javax.persistence.Column;
+import javax.persistence.Embeddable;
+import lombok.Builder;
+
+@Embeddable
+@Builder
+public class PropertyPK implements Serializable {
+
+    private String key;
+
+    @Column(name = "employee_id")
+    private Long employeeId;
+
+    public String getKey() {
+        return key;
+    }
+
+    public void setKey(String key) {
+        this.key = key;
+    }
+
+    public Long getEmployeeId() {
+        return employeeId;
+    }
+
+    public void setEmployeeId(Long employeeId) {
+        this.employeeId = employeeId;
+    }
+}
diff --git a/src/main/java/com/zoomcare/candidatechallenge/repository/EmployeeRepository.java b/src/main/java/com/zoomcare/candidatechallenge/repository/EmployeeRepository.java
new file mode 100644
index 0000000..8694f0a
--- /dev/null
+++ b/src/main/java/com/zoomcare/candidatechallenge/repository/EmployeeRepository.java
@@ -0,0 +1,11 @@
+package com.zoomcare.candidatechallenge.repository;
+
+import com.zoomcare.candidatechallenge.model.Employee;
+import java.util.List;
+import java.util.Optional;
+import org.springframework.data.jpa.repository.JpaRepository;
+
+public interface EmployeeRepository extends JpaRepository<Employee, Long> {
+    Optional<Employee> findById(Long id);
+    List<Employee> findAllBySupervisorIdIsNull();
+}
diff --git a/src/main/java/com/zoomcare/candidatechallenge/service/EmployeeService.java b/src/main/java/com/zoomcare/candidatechallenge/service/EmployeeService.java
new file mode 100644
index 0000000..a2c1818
--- /dev/null
+++ b/src/main/java/com/zoomcare/candidatechallenge/service/EmployeeService.java
@@ -0,0 +1,36 @@
+package com.zoomcare.candidatechallenge.service;
+
+import com.zoomcare.candidatechallenge.dto.EmployeeDTO;
+import com.zoomcare.candidatechallenge.model.Employee;
+import com.zoomcare.candidatechallenge.repository.EmployeeRepository;
+import java.util.List;
+import java.util.Optional;
+import java.util.stream.Collectors;
+import org.modelmapper.ModelMapper;
+import org.springframework.stereotype.Service;
+
+@Service
+public class EmployeeService {
+    private final EmployeeRepository employeeRepository;
+    private final ModelMapper modelMapper;
+
+    public EmployeeService(EmployeeRepository employeeRepository, ModelMapper modelMapper) {
+        this.employeeRepository = employeeRepository;
+        this.modelMapper = modelMapper;
+    }
+
+    public Optional<EmployeeDTO> findById(Long id) {
+        return employeeRepository.findById(id).map(this::convertToDto);
+    }
+
+    public List<EmployeeDTO> getTopLevelEmployee() {
+        return employeeRepository.findAllBySupervisorIdIsNull().stream()
+                .map(this::convertToDto)
+                .collect(Collectors.toList());
+    }
+
+    public EmployeeDTO convertToDto(Employee employee) {
+        return modelMapper.map(employee, EmployeeDTO.class);
+    }
+
+}
diff --git a/src/main/resources/application.yml b/src/main/resources/application.yml
index 4408d17..69ee7c7 100644
--- a/src/main/resources/application.yml
+++ b/src/main/resources/application.yml
@@ -1,4 +1,6 @@
 spring:
+  main:
+    allow-bean-definition-overriding: true
   h2:
     console:
       enabled: true
diff --git a/src/test/java/com/zoomcare/candidatechallenge/service/EmployeeServiceTest.java b/src/test/java/com/zoomcare/candidatechallenge/service/EmployeeServiceTest.java
new file mode 100644
index 0000000..b31af1c
--- /dev/null
+++ b/src/test/java/com/zoomcare/candidatechallenge/service/EmployeeServiceTest.java
@@ -0,0 +1,110 @@
+package com.zoomcare.candidatechallenge.service;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+import static org.mockito.Mockito.when;
+
+import com.zoomcare.candidatechallenge.dto.EmployeeDTO;
+import com.zoomcare.candidatechallenge.model.Employee;
+import com.zoomcare.candidatechallenge.model.Property;
+import com.zoomcare.candidatechallenge.model.PropertyPK;
+import com.zoomcare.candidatechallenge.repository.EmployeeRepository;
+import java.util.Arrays;
+import java.util.List;
+import java.util.Optional;
+import org.junit.Before;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.mockito.Mock;
+import org.mockito.junit.MockitoJUnitRunner;
+import org.modelmapper.ModelMapper;
+
+@RunWith(MockitoJUnitRunner.class)
+public class EmployeeServiceTest {
+    private final Long EMPLOYEE_ID = 2L;
+    private final Long SUPERVISOR_ID = 1L;
+    private final String PROPERTY_KEY = "key";
+    private Employee employee;
+    private Employee supervisorEmployee;
+
+    @Mock
+    private EmployeeRepository employeeRepository;
+
+    private PropertyPK propertyPK;
+    private Property property;
+    private ModelMapper modelMapper;
+
+    private EmployeeService employeeService;
+
+    @Before
+    public void setUp() {
+        modelMapper = new ModelMapper();
+        employeeService = new EmployeeService(employeeRepository, modelMapper);
+
+        propertyPK = PropertyPK.builder()
+                .employeeId(EMPLOYEE_ID)
+                .key(PROPERTY_KEY)
+                .build();
+
+        property = Property.builder()
+                .id(propertyPK)
+                .value("value")
+                .build();
+
+        employee = Employee.builder()
+                .id(EMPLOYEE_ID)
+                .supervisorId(SUPERVISOR_ID)
+                .properties(Arrays.asList(property))
+                .build();
+
+        supervisorEmployee = Employee.builder()
+                .id(1l)
+                .directReports(Arrays.asList(employee))
+                .build();
+
+    }
+
+    @Test
+    public void findByIdFindsEmployeeTest() {
+        when(employeeRepository.findById(EMPLOYEE_ID)).thenReturn(Optional.of(employee));
+
+        Optional<EmployeeDTO> result = employeeService.findById(EMPLOYEE_ID);
+
+        assertTrue(result.isPresent());
+        EmployeeDTO employeeDTO = result.get();
+        assertEquals(EMPLOYEE_ID, employeeDTO.getId());
+        assertEquals(propertyPK.getKey(), employeeDTO.getProperties().get(0).getId().getKey());
+        assertEquals(property.getValue(), employeeDTO.getProperties().get(0).getValue());
+        assertEquals(employee.getSupervisorId(), employeeDTO.getSupervisorId());
+        assertEquals(employee.getProperties().get(0).getValue(), employeeDTO.getProperties().get(0).getValue());
+    }
+
+    @Test
+    public void findByIdEmployeeNotFoundTest() {
+        Optional<EmployeeDTO> result = employeeService.findById(3L);
+
+        assertFalse(result.isPresent());
+    }
+
+    @Test
+    public void getTopLevelEmployeeFoundTest() {
+        when(employeeRepository.findAllBySupervisorIdIsNull()).thenReturn(Arrays.asList(supervisorEmployee));
+
+        List<EmployeeDTO> supervisors = employeeService.getTopLevelEmployee();
+
+        assertFalse(supervisors.isEmpty());
+        EmployeeDTO supervisor = supervisors.get(0);
+        assertEquals(SUPERVISOR_ID, supervisor.getId());
+        assertEquals(supervisorEmployee.getSupervisorId(), supervisor.getSupervisorId());
+        assertEquals(supervisorEmployee.getDirectReports().size(), supervisor.getDirectReports().size());
+        assertEquals(EMPLOYEE_ID, supervisor.getDirectReports().get(0).getId());
+    }
+
+    @Test
+    public void getTopLevelEmployeeNotFoundTest() {
+        List<EmployeeDTO> supervisors = employeeService.getTopLevelEmployee();
+
+        assertTrue(supervisors.isEmpty());
+    }
+}
\ No newline at end of file