diff --git a/curriculumsearch/pom.xml b/curriculumsearch/pom.xml
index b88363f..40c2bd1 100644
--- a/curriculumsearch/pom.xml
+++ b/curriculumsearch/pom.xml
@@ -57,6 +57,12 @@
 			<artifactId>hibernate-validator</artifactId>
 			<version>6.0.13.Final</version>
 		</dependency>
+
+		<dependency>
+			<groupId>javax.servlet</groupId>
+			<artifactId>jstl</artifactId>
+			<version>1.2</version>
+		</dependency>
 	</dependencies>
 
 	<build>
diff --git a/curriculumsearch/src/main/java/com/roshka/controller/PostulanteController.java b/curriculumsearch/src/main/java/com/roshka/controller/PostulanteController.java
index 704c094..7e4eec7 100644
--- a/curriculumsearch/src/main/java/com/roshka/controller/PostulanteController.java
+++ b/curriculumsearch/src/main/java/com/roshka/controller/PostulanteController.java
@@ -6,11 +6,13 @@ import javax.validation.ConstraintViolationException;
 
 import com.roshka.modelo.Postulante;
 import com.roshka.repositorio.PostulanteRepository;
+import com.roshka.repositorio.TecnologiaRepository;
 
 import org.springframework.beans.factory.annotation.Autowired;
 import org.springframework.http.HttpStatus;
 import org.springframework.http.ResponseEntity;
 import org.springframework.stereotype.Controller;
+import org.springframework.ui.Model;
 import org.springframework.web.bind.MethodArgumentNotValidException;
 import org.springframework.web.bind.annotation.*;
 
@@ -20,19 +22,28 @@ public class PostulanteController {
     @Autowired
     PostulanteRepository post;  
 
+    @Autowired
+    TecnologiaRepository tecRepo;
+
     @RequestMapping("/")
     public String index() {
         return "index";
     }
 
     @RequestMapping("/postulante")
-    public String getFormPostulante(){
-        
+    public String getFormPostulante(Model model){
+        model.addAttribute("tecnologias", tecRepo.findAll());
         return "postulante-form";
     }
 
     @PostMapping(value = "/postulante",consumes = "application/json")
     public String guardarPostulante(@RequestBody Postulante postulante){
+        //se obtiene referencia de todas las tecnologias existentes
+        postulante.getTecnologias().stream().filter(
+                    tec -> tec.getTecnologia().getId() != 0 
+            ).forEach(
+                    tec -> tec.setTecnologia(tecRepo.getById(tec.getTecnologia().getId()))
+                    );
         post.save(postulante);
         return "redirect:/";
     }
diff --git a/curriculumsearch/src/main/java/com/roshka/modelo/PostulanteTecnologia.java b/curriculumsearch/src/main/java/com/roshka/modelo/PostulanteTecnologia.java
index f4e9263..4f4747b 100644
--- a/curriculumsearch/src/main/java/com/roshka/modelo/PostulanteTecnologia.java
+++ b/curriculumsearch/src/main/java/com/roshka/modelo/PostulanteTecnologia.java
@@ -9,13 +9,15 @@ import javax.persistence.Id;
 import javax.persistence.JoinColumn;
 import javax.persistence.ManyToOne;
 import javax.persistence.Table;
+import javax.persistence.UniqueConstraint;
 import javax.validation.constraints.Max;
 import javax.validation.constraints.Min;
 import javax.validation.constraints.NotBlank;
 
 import com.fasterxml.jackson.annotation.JsonBackReference;
 @Entity 
-@Table(name="postulante_tecnologia")
+@Table(name="postulante_tecnologia",
+uniqueConstraints=@UniqueConstraint(columnNames={"postulante_id", "tecnologia_id"}))
 
 public class PostulanteTecnologia {
    @Id 
@@ -27,7 +29,7 @@ public class PostulanteTecnologia {
    @Min(value = 1)
    @Max(value = 5)
    private Long nivel;
-    @ManyToOne(cascade = CascadeType.PERSIST)
+    @ManyToOne(cascade = {CascadeType.PERSIST,CascadeType.MERGE},optional = false)
     @JoinColumn
    private Tecnologia tecnologia;
 
diff --git a/curriculumsearch/src/main/resources/application.properties b/curriculumsearch/src/main/resources/application.properties
index d6c6325..192b323 100644
--- a/curriculumsearch/src/main/resources/application.properties
+++ b/curriculumsearch/src/main/resources/application.properties
@@ -1,7 +1,10 @@
 
 spring.jpa.hibernate.ddl-auto=create-drop
 spring.jpa.database-platform=org.hibernate.dialect.PostgreSQLDialect
-
+spring.jpa.show-sql=true
+spring.jpa.properties.hibernate.format_sql=true
+logging.level.org.hibernate.SQL=DEBUG
+logging.level.org.hibernate.type.descriptor.sql.BasicBinder=TRACE
 
 spring.sql.init.mode=always
 spring.sql.init.platform=postgres
diff --git a/curriculumsearch/src/main/resources/static/main.js b/curriculumsearch/src/main/resources/static/main.js
index 0cd5fdf..bacc868 100644
--- a/curriculumsearch/src/main/resources/static/main.js
+++ b/curriculumsearch/src/main/resources/static/main.js
@@ -56,10 +56,11 @@ function agregarFieldTecnologia(){
         pairs[name] = value
     }
     tecnologias[cont_tecnologia]={}
-    tecnologias[cont_tecnologia]["tecnologia"]={nombre: pairs.nombre}
+    tecnologias[cont_tecnologia]["tecnologia"]=pairs["tecnologia-id"]=="-1"?{nombre: pairs["tecnologia-nombre"]}:{id: pairs["tecnologia-id"],nombre:document.querySelector('option[value="'+pairs["tecnologia-id"]+'"]').innerHTML}
     tecnologias[cont_tecnologia]["nivel"]=pairs.nivel
     //tecnologias[cont_tecnologia] = pairs;
     formtecn.reset();
+    document.querySelector("#tecnologia-nombre").classList.add('d-none')
     //imprimir lista actualizada
     const div = document.querySelector("#tecnologias")
     const div1 = document.createElement('div');
@@ -149,4 +150,6 @@ form.addEventListener("submit",(evt)=>{
         }
     });
     evt.preventDefault();
-} );
\ No newline at end of file
+} );
+
+document.querySelector("#btn-new-tech").addEventListener('click',()=>{document.querySelector("#tecnologia-nombre").classList.remove('d-none')})
\ No newline at end of file
diff --git a/curriculumsearch/src/main/webapp/jsp/postulante-form.jsp b/curriculumsearch/src/main/webapp/jsp/postulante-form.jsp
index 5ee55ad..f0969d4 100644
--- a/curriculumsearch/src/main/webapp/jsp/postulante-form.jsp
+++ b/curriculumsearch/src/main/webapp/jsp/postulante-form.jsp
@@ -1,3 +1,6 @@
+<%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>
+<%@ taglib prefix="form" uri="http://www.springframework.org/tags/form" %>
+<%@ page contentType="text/html;charset=UTF-8" language="java" %>
 <!doctype html>
 <html lang="en">
   <head>
@@ -158,8 +161,19 @@
             </div>
             <div class="modal-body">
                 <form name="tecnologia-form">
-                    <label for="nombre" class="form-label">Nombre</label>
-                    <input type="text" class="form-control" name="nombre" id="nombre" >
+                  <label for="tecnologia-nombre" class="form-label">Tecnologia</label>
+                  <div class="input-group mb-3">
+                    <select class="form-select" name="tecnologia-id" aria-label="Default select example">
+                      <option value="-1" selected>Open this select menu</option>
+                      <c:forEach items="${tecnologias}" var="tecnologia">
+                        <option value="${tecnologia.id}">${tecnologia.nombre}</option>
+                      </c:forEach>
+                    </select>
+                    <button class="btn btn-outline-secondary" type="button" id="btn-new-tech">Agregar nuevo</button>
+                  </div>
+                    
+                    
+                    <input type="text" class="form-control d-none" name="tecnologia-nombre" id="tecnologia-nombre" >
                     <label for="nivel" class="form-label">Nivel</label>
                     <input type="number" class="form-control" name="nivel" id="nivel" >
                 </form>