Ángel Cervera Claudio

Developer since 1998 - Contractor / Freelancer since 2001

No one is more of a Java evangelist and advocate than me.

Cork / Ireland

Phone: please enable javascript to view

email:

web: http://www.acervera.com

blog: http://www.acervera.com/blog

skype: angelcervera

Google Hangout: angelcervera

Citizenship: European ( Spain )

Positions :

  • Technical Lead / JavaEE Architect
  • BigData Developer
  • Senior Java / JavaEE Developer
  • Senior GIS Developer

Download my CV in: odt pdf doc

Personal profile

I’m passionate about new technologies, since my very first contact with my Spectrum 64k and her BASIC tutorial.

I’m a Java Expert, BigData developer and a Senior GIS developer. Since 1998, I have worked on more than 50 large scale projects, mainly all in Java and related technologies.

No one is more of a Java / JavaEE evangelist and advocate than me.

Recently, I have been in technical positions as senior software developer and tech lead, sometimes shared with team manager, software architect and project manager responsibilities.

I’m looking for challenges in large projects for big companies and visionary startups. I bring to every project agile methodologies and desire to be with a great team.

My motto is that good software is only possible with happy developers in a great work environment.

Skills summary

Expert (All that can be) in Java EE stack and Java technologies, as well as rich experience in Unix/Linux environments and databases.

Experience in Test Driven Development (TDD).

Great experience in integrations with external platforms.

Listed below, a resume about the principal technologies used for me in different projects:

  • JavaEE stack (Java / JPA / JAXRS / EJB / Jsp / Servlets / etc)
  • Scala, Akka, Sbt.
  • BigData: Hadoop ecosystem (MapReduce, HDFS, HBase and occasionally PIG and Sqoop)
  • NoSQL Database: Cassandra /MongoDB / Elastic Search / Hstore / Infinispan / BigMemoryGo / Trove / BerkeleyDB / Tinkerpop stack / Titan / OrientDB / Neo4J
  • GIS: Postgis / PGRounting / OpenLayers / Leaflet / Geotools / GeoServer
  • TDD and testing: TestNG / Junit / Selenium / Qunit
  • CI and build tools: ant / maven / Jenkins / Hudson / Continuum
  • SQL Database: Oracle / MySQL / Postgresql
  • Other Java related: RabbitMQ / Zookeeper / spring-integration / Apache commons libraries / J2ME / Threads / JDBC / Applets / Swing / XML / XML-RPC / Struts / Spring (spring-code, spring-security, spring-dao, spring-mock, etc.) / JavaMail / EJBs / JDO / Ibatis / Java WebStart / Web Services / jasperReports / Eclipse BIRT / Hibernate / etc...
  • Front end: JavaScript Client, Jquery, dustjs, bootstrap / XHTML 5 / HTML 5 / CSS 3
  • Application servers: Glassfish / Jboss / Tomcat / WebSphere / WebLogic / iPlanet / OC4J
  • Integration with OAUTH 2.0, LDAP, Amazon, social networks, privates security systems, digital payment systems (4B, Servired, Paypal, etc) etc.
  • Portals: SimplexPortal
  • Operating System: Unix / Linux (Ubuntu, Debian, Gentoo, etc)
  • Other languages: Scala / C / C++ / JavaScript Server / Nodejs
  • Monitoring tools: Ambari, Nagios, Ganglia

Experience in team management and interaction with people, with customers, suppliers and employees.

Key achievements

My more meritorious project has been my own startup project: www.simplexportal.com/en/index.html, a CMS / ecommerce SAAS platform developed from the scratch, where I demonstrate that usability and simplicity are compatible with flexibility, powerful and performance, and It's possible using standard technologies.

In last years, my key achievements have been develop large cost software for startup projects with very low resources and in short time, using technologies considered expensive, like BigData / GIS frameworks / platforms and JavaEE, using opensource tools and frameworks.

In 2001 I was the Java tech lead in the first enterprise project base in Java/J2EE in an important bank company (Santander Bank). My share in this project was recompensed with a 2 year contract in this company as Java tech lead in one of the more important departments (The Treasury Department).

Employment summary

Contractor / Freelancer : 2001 – Present

I started my career as Java contractor in Santander Bank and my last client has been EMC.

Since that time, I have collaborated in more than 50 projects, always related with Java technologies and in different customers.

Mainly, my responsibilities in most projects have been the same, responsible of good quality of code and technical decision.

This whole quantity of projects and customers have allowed me collaborated in a lot of different sector and markets, like banking, insurance, real estate, telecommunications, elearning or ecommerce.

One of the most technically difficult project has been SimplexPortal, a powerful, scalable, easy to use and useful CMS / Ecommerce developed from the scratch, using standard technologies based in Java/JavaEE.

On August 2013, I started to work in projects related with BigData, using new technologies like Cassandra, Hadoop and MapReduce. BigData has became my main occupation.

Other projects related with GIS, like tools for marketing and sales analysis turned me into an experimented developer in technologies and tools like geotools, geoserver, postgis, openlayers and leaflet.

Skills developed: Java, JavaEE, BigData, Spring, GIS Opensource tools and frameworks, TDD, Scrum and basically all skills listed in “Skill summary” section.

Below a list of some projects as Contractor / Freelancer :

Duns and Bradstreet : October 2015 – Currently

Project: Direct+ Search (API and Engine)

Skills developed: Java Rest API, Swagger, Elasticsearch, EMR, Cascading, ...

August 2015 – Currently

Project: Spatial Network Labs

Implementation of a server to improve different algorithms over spatial networks and concurrent / parallel processing.

Web: https://github.com/angelcervera/spatial-network-labs

Skills developed: Scala, Akka, sbt.

EMC : March 2015 – October 2015

Project: Business Data Lake / Metering and Monitoring

Position: Senior Java Developer

As part of an international BigData project, we built the software to recollect and show all metrics and monitoring the whole system, from the ingestion process to the analysis, gathering system information and business information..

To be able to do this, we are in contact with all team related with the project.

Web: http://www.emc.com

Skills developed: Java, spring-integration, RabbitMQ, Hadoop, HDSF, Zookeeper, PIG, Sqoop, MongoDB, Greenplum, linux (Ubuntu Server / Desktop), SVN, Junit, Maven, scrum, agile, Spring-Mvc ( ResFul ), Ambari, Nagios, Ganglia.

EMC : March 2014 – Febrary 2015

Project: ECPS

Position: Senior Java Developer

As part of an international BigData project, we built the software to recollect and analysis a large amount of heterogeneous data files gathered from a lot of different systems. With this data, we can analyze and extract a lot of different information, like predict possible problems in EMC customer's services and devices, report usage to different platforms, etc.

Web: http://www.emc.com

Skills developed: Java, spring-integration, RabbitMQ, Hadoop, HDSF, Zookeeper, PIG, Sqoop, MongoDB, Greenplum, linux (Ubuntu Server / Desktop), SVN, Junit, Maven, scrum, agile, Spring-Mvc ( ResFul).

Real Estate Analytics : July 2013 – January 2014

Project: elocalia.com

Position: Senior JavaEE Developer / Senior GIS Developer and Technical Architect

We built a technology platform for new Real Estate company, based in BigData, Data Mining and GIS, used in the automation of search premises and calculation of ideal places for new business, depending on the marker sector, demographic data, sociological data and public survey data.

As technical leader, I tested a lot of big data and data mining tools, always from the point view of Geospacial data.

Web: http://www.elocalia.com/en/index.html

Skills developed: Java, JavaEE Stack (JAXRS, JPA, EJBs, JAXB, etc), Postgresql, Postgis, PGRouting, OpenStreetMap, HStore, Geotools, Leafletjs, jquery, javascript, dustjs, Restful, html5, css3, bootstrap, Geojson, linux (Ubuntu Server / Desktop), Mercurial, Glassfish, TestNG, ant, ivy

Other tools and frameworks tested: Cassandra, ElasticSearch, Infinispan, BigMemoryGo, Trove, BerkeleyDB, Tinkerpop stack, Titan, OrientDB, Neo4J

Silyan Software : August 2013 - February 2014

Project: Silyan Spatial

Position: Senior JavaEE Developer / Senior GIS Developer and Technical Architect

I built a service to calculate influence areas (Driving Distance) using distributed memory graph network to obtain incredible performance and replace pgRouting solutions.

Has two different modules:

  • The service used to calculate areas in real time, based in graphs.
  • The Hadoop architecture to prepare optimized graph based in OpenStreetMap data.

Skills developed: Java, Hadoop MapReduce, Tinkerpop Blueprints, Thinkaurelious Titan, Hbase, Cassandra, OpenStreetMap, JTS (Java Topology Suite), Geotools, linux (Ubuntu Server / Desktop), Mercurial, TestNG, ant, ivy

One of the most important supermarket chain in Europe : September 2012 – January 2014

Project: Retail / Franchise premises – Marketing department

Position: Senior Java Developer / GIS Developer and Technical Architect

We built a tool for automation, analysis and reports of commercial premises to calculate sales previsions and search ideal locations, based in real time, programmables and parameterizable equations.

Skills developed: Java, JavaEE Stack (JAXRS, JPA, EJBs, JAXB, etc), TestNG, ant, ivy, Rhino, JSR-223, Postgresql, Postgis, PGRouting, NavTeq, Geoserver, OpenLayers, jquery, JasperReports, javascript, Restful, html5, css3, WMS, Geojson, linux (Ubuntu Server / Desktop), Mercurial, Glassfish

GeoSpacial Training : July 2012 – October 2013

Project: Online instructor in OpenSource GIS technologies

Position: Instructor

I was the instructor in the course “Open Source GIS Bootcamp” for Spanish speakers and English speakers people.

Web: http://www.geospatialtraining.com

DataCentric : February 2011 – November 2011

Project: Tuwebmap

Position: Senior Java Developer / GIS Developer and Technical Architect

We built a web application to exploit existing “big data” database with heterogeneous information.

This data is related with geospacial information and users can generate new data creating new shapes and recalculating new data based on the existing.

Skills developed: Java, JavaEE Stack (JAXRS, JPA, EJBs, JAXB, etc), TestNG, ant, ivy, Postgresql, Postgis, PGRouting, OpenStreetMap, Geoserver, OpenLayers, jquery, javascript, Restful, html5, css3, WMS, Geojson, linux (Ubuntu Server / Desktop), Subversion, Glassfish

Arcobaleno 2000 : June 2010 - December 2010

Project: www.arcobaleno2000.com

Position: Senior Software Developer and Technical Architect

We built an ecommerce and CRM solution based in first version of SimplexPortal platform, with strong integration with Microsoft Navision.

Skills developed: Java, JavaEE Stack, maven, Spring (spring-code, spring-security, spring-dao, spring-mock, etc.), jquery, javascript, html, css, Geojson, linux (Ubuntu Server / Desktop), Subversion, Glassfish, mysql

Meyem : April 2009 – March 2012

Project: Meyem Online / GIS Module

Position: Senior Java Developer / GIS Developer and Technical Architect

Meyem is one of the most important geomarketing company in Spain. We built the CRM, ERP and GIS application for this company.

In addition to the more typical features of CRM, ERP and GIS, this application is used for planning, coordination, monitoring and reporting of leaflets distribution in all Spain.

Skills developed: Java, JavaEE Stack (JAXRS, JPA, EJBs, JAXB, etc), Eclipse BIRT, TestNG, ant, ivy, Postgresql, Postgis, Geoserver, OpenLayers, jquery, javascript, Restful, html5, css3, WMS, Geojson, linux (Ubuntu Server / Desktop), Subversion, Glassfish

Silyan Software : October 2008 – February 2014

Project: SimplexPortal

Position: Senior Software Developer and Technical Architect

This is my more ambitious project.

It's a complete CMS/ECOMMERCE SAAS hight performance solution, developed from the scratch and based in JavaEE technologies.

Started the project in 2008 after tested solutions like liferay, alfresco or magnolia, my team and I developed a CMS based in de facto standard technology. Looking for a SAAS solution and an easy SDK, we refactoring first version and removing completely Spring, Portlets, JSF and JCR, we have obtained an incredible hight performance and UX platform.

Skills developed: Java, JavaEE (JAXRS, JPA, EJBs, JAXB, etc), Spring (spring-code, spring-security, spring-dao, spring-mock, etc.), maven, Junit, TestNG, Oracle database, Postgresql, MySQL, Portlets, Jackrabbit, JSR170, JSR283, JSR286, jquery, javascript, dustjs, velocity, Restful, html5, css3, bootstrap, linux (Ubuntu Server / Desktop), Mercurial, Glassfish, Auth2

Panama Government : October 2008 – May 2009

Project: Marina Mercante / Gente de Mar

Position: Team Manager, Senior Software Developer and Technical Architect

We work in the refactoring of applications used by Panama Goverment for the management and expedition of authorization cards.

We added features of I18N using Java standards.

Also, I coordinated translators and developers and for this proposed, we built an automatic process to find all resources, generate excel files, send files to translator and the reverse process.

Skills developed: Java, JavaEE (jsp, jstl, servlets, etc.), Spring (spring-code, spring-security, spring-dao, spring-mock, etc.), struts, ant, Ibatis, Oracle database, Tomcat, Weblogic

Panama Government : April 2008 – June 2008

Project: Biometric suitcase

Position: Team Manager, Senior Software Developer and Technical Architect

We built software for a mobile biometric suitcase (basically, a fireproof, dustprooff and waterproof suitcase with a 3G netbook and various devices connected), used to capture data (fingerprint, signature, passport photo, etc), storage locally this data and send to central servers when suitcase had an Internet connection.

Skills developed: Java, JavaEE (jsp, jstl, servlets, etc.), Spring (spring-code, spring-security, spring-dao, spring-mock, etc.), struts, ant, Ibatis, mysql database, Tomcat, webservices

ArcelorMittal : May 2008 – December 2008

Project: Framework agreements

Position: Senior Software Developer and Technical Architect

We built the ERP used to manage and negotiation of framework agreements with commodities providers.

In this project, the main difficulty was integration between SAP, SharePoint and our application.

Skills developed: Java, JavaEE (jsp, jstl, servlets, etc.), Spring (spring-code, spring-security, spring-dao, spring-mock, etc.), struts, maven, Hibertante, Sqlserver database, Tomcat, Websphere, webservices, SharePoint

Mexico Government : November 2007 – December 2007

Project: Business Intelligence Module

Position: Senior Software Developer and Technical Architect

We built the business intelligence module integrated with the application used to generation and management of Mexico Passports.

Skills developed: Java, JavaEE (jsp, jstl, servlets, etc.), Spring (spring-code, spring-security, spring-dao, spring-mock, etc.), struts, ant, Ibatis, Oracle database, Tomcat, Weblogic, JasperReports

International Council for Game and Wildlife Conservation : August 2007 – October 2007

Project: CIC Wildlife

Position: Senior Software Developer and Technical Architect

We built an ERP used to management, publication and certification of international hunting trophies.

Skills developed: Java, JavaEE (jsp, jstl, servlets, etc.), Spring (spring-code, spring-security, spring-dao, spring-mock, etc.), struts, maven, JDO, Mysql, Tomcat, JasperReports

NaturalCom : August 2006 – September 2006

Project: NCRouter

Position: Senior Software Developer and Technical Architect

We built a mobile router, who get information from Anoto Digital Pen, store this information in the mobile device and resend data to specific URL when 3G connection is available.

In server, we implement a configurable proxy who process and resend data, depending of the configuration and the data patterns.

Skills developed: Java, J2ME, Bluetooth, RPC, WebServices, Anoto Digital Pen Technology

Amena : February 2006 – August 2006

Project: Natural Notes

Position: Senior Software Developer and Technical Architect

We built an application based in Anoto Digital Pen Technology, who synchronize handwritten book with an online digital version (in pdf format).

Skills developed: Java, J2EE, JSP, JSTL, Servlets, HTML, CSS, MySQL, Anoto Digital Pen Technology

HCI International : April 2005 – September 2006

Project: Booking tool

Position: Senior Software Developer and Technical Architect

We built a booking and ERP application for HCI International, broker between hotel chains and tour operators.

Skills developed: Java, J2EE, JSP, JSTL, Servlets, HTML, CSS, MySQL

Calidad De Hogar : August 2005 – April 2006

Project: Calidad de hogar

Position: Senior Software Developer and Technical Architect

We built a CRM/ERP developed for the home services contractor company, specialist in foreign personal service.

This application manages meetings, personal skills, customer request, etc.

Skills developed: Java, J2EE, JSP, JSTL, Servlets, HTML, CSS, MySQL

IP Soluciones : February 2005

Project: puntoinmobiliario.com

Position: Senior Software Developer

This application was a site and a CRM/ERP for a real estate company.

I built the online search module.

Skills developed: Java, J2EE, JSP, JSTL, Servlets, HTML, CSS, Postgresql

Ancades : November 2004 / January 2004

Project: Inventory and Bidding

Position: Senior Software Developer and Technical Architect

We built a simplex CMS to edit the inventory and bidding of horses' ANCADES.

Skills developed: Java, J2EE, JSP, JSTL, Servlets, HTML, CSS, Mysql

Cyrus : September 2004 / November 2004

Project: Cyrus

Position: Senior Software Developer and Technical Architect

We built a CRM/ERP for horse studs management.

Skills developed: Java, J2EE, JSP, JSTL, Servlets, HTML, CSS, Mysql

Crédito y Caución : April 2004 / August 2004

Project: Technical Lead for IBM/INSA

Position: Technical Architect and Technical Lead.

I was the technical lead and java expert, responsable of IBM projects in Crédito y Caución.

Mainly, we built a frontend and proxy between internal services developed in COBOL and final user.

Skills developed: Java, J2EE, JSP, JSTL, Servlets, HTML, CSS.

Danone : January 2004 / April 2004

Project: Danone Yellow Pages / Danone White Pages

Position: Senior Software Developer.

We built a human resource portal and intranet with profiles and skills of employees and providers.

Skills developed: Java, J2EE, JSP, JSTL, Servlets, HTML, CSS, LDAP

Innova Solutions : January 2004 / April 2004

Project: Glaciar / LogHost

Position: Senior Software Developer.

We built an application for analysis and exportation of log systems.

Skills developed: Java, PERL

Espasa Calpe : April 2003 / November 2003

Project: Campus Home English / CEAC English

Position: Senior Software Developer, Technical Quality Supervisor

We built the first version of the elearning portal of Home English and CEAC.

Skills developed: Java, J2EE, JSP, JSTL, Servlets, HTML, CSS, SQL Server

IP Soluciones : April 2003 / November 2003

Project: For a luxury Reale estate company

Position: Senior Software Developer

We built a CRM and real estate Portal.

Skills developed: Java, J2EE, JSP, JSTL, Servlets, HTML, CSS, Postgresql

Santander Bank : August 2002 / February 2003

Project: Security module

Position: Senior Software Developer and Technical Architect

We define and develope the security standard for applications at treasure department.

Skills developed: Java, Swing, AWT, J2EE, JSP, JSTL, Servlets, HTML, CSS, Oracle, Weblogic

Santander Bank : August 2002 / February 2003

Project: Contract Management

Position: Senior Software Developer and Technical Architect

We built an application to management and evolution control of contracts between risk and legal advice departments.

Skills developed: Java, J2EE, JSP, JSTL, Servlets, HTML, CSS, Oracle, Weblogic

Santander Bank : April 2002 / February 2003

Project: Subcontracted employees timecard

Position: Senior Software Developer and Technical Architect

We built an application to management and timecard for subcontracted employees.

Skills developed: Java, J2EE, JSP, JSTL, Servlets, HTML, CSS, Oracle, Weblogic

Santander Bank : August 2002 / February 2003

Project: Warrants

Position: Senior Software Developer and Technical Architect

We built an application to realtime management and monitoring of Warrants product transactions.

Skills developed: Java, Swing, Tibco.

Santander Bank : November 2001 / December 2001

Project: Fixed income securities management

Position: Senior Software Developer and Technical Architect

We built the software user to manage the product “Fixed income securities” for wholesalers brokers.

Skills developed: Java, J2EE, JSP, JSTL, Servlets, HTML, CSS, Oracle, Weblogic

Santander Bank : April 2001 / November 2001

Project: Equity funds management

Position: Senior Software Developer and Technical Architect

We built the software user to manage the product “Equity funds” for wholesalers brokers.

This was my first project as Freelance and the first project developed in Santander bank using java tecnologies. But Java is here to stay!

Skills developed: Java, J2EE, JSP, JSTL, Servlets, HTML, CSS, Oracle, Weblogic

A large list of projects : 2001 – Currently

Position: Senior Software Developer and Technical Architect

Above I explain briefly the more important and recent projects, but since 2001 I have collaborated in approximately 40 projects related with different sectors like banking, telecommunications, government, insurance, engineering and real estate.

I worked in important projects and companies, like Panama Government and Mexican Government biometric projects in 2008 or Santander Bank equity and debt securities management software in 2001.

The Principality of Asturias : 2006 – 2007

Position: Senior Software Developer and Technical Architect

In this parenthesis as Freelancer, I was member of “The core team”, a selected twelve people team, responsible for the architecture and framework used in all applications developed for the government of The Principality of Asturias.

Skills developed: Java, JavaEE, Spring (spring-code, spring-security, spring-dao, spring-mock, etc.), maven, Junit, Ibatis, Oracle database, Oracle Application Server (OC4J), Oracle BPEL, Portlets, Vignette.

Qarana Solutions : 2000 – 2001

Position: Software developer / Team Manager

In two years, and starting as a software developer I became the team manager in an important project for Patagon.

Thanks to the philosophy of the company, in that time I learned a lot about new trending of software development.

In this company, I collaborated in 3 different projects:

  • Diversia: Ecommerce, worldwide leader, specialist in DVDs, books y CDs, using Broadvision Javascript server side and oracle technologies.
  • Banca Credem: Home banking developed in Italy using Broadvision Javascript server side and oracle technologies.
  • Patagon Aggregator: Multi-bank Portal (aggregator) for Patagon using Java.

Skills developed: Java, ant, Javascript Server Side (With broadvision), Oracle database.

Indra : 1999 – 2000

Position: Software developer

I worked in the migration of large part of the computerization of Telefónica, from a COBOL/DBASE system to C++/Oracle, developing a complex and large batch process for big data manipulation.

Sometimes younger people think that Big Data is something new, but this is an example of Big Data in the past century! And yes, using technologies of the past century. Wish we had Hadoop!

Skills developed: C++, Visual C++, Oracle Database, PLSQL, DBASE, Big Data.

Xtrem : 1998 – 1999

Position: Software developer

This was my first project as retributed developer. Basically, the project was computerizing of a department of “El Corte Inglés”, an important Spanish company.

It was a typically three layer architecture based in Microsoft Technologies.

Skills developed: C++, Visual C++, MFC, Cristal Reports, SQL Server.

Education Summary

Technical Engineer Bachelor Degree (3 years / 1998) in Computer Systems / Extremadura University (Spain).

I need present the final project, but I have a lot of important things to do.

Formal Training

  • Scrum Manager Certificated – June 2011 / 16 hours. info
  • Oracle BPEL – 2006 / 1 day

Other personal projects

MaiFeed : Febrary 2015 – Currently

Project: MaiFeed

Position: All possible technical roles :)

Maifeed is a free “reader” dedicated to Facebook Fan Page posts. When a person following your Fan Page subscribes to Maifeed, we deliver 100% of your post to them.

In this moment, we are in the first stage of the startup project.

Web: http://www.maifeed.com

Skills developed: Java, JavaEE (JaxRS, EJB), HTML5/JavaScript, Titan Graph Database (Cassandra / ElasticSearch), TinkerPop Blueprints Graph Stack, Facebook API, OAuth 2.0

Project: Dust-fw

Dust-fw is my own new architecture based in a complete decoupling of the user interface and the backend.

This Architecture is based SOAP, but using RestFul and a simplification of messages.

This architecture has been used in my last three projects with successful in conjunction with dustjs and JAXRS.

Web: Github URL

Project: Berta

Berta is a data-driven design tool that transform a simple set of XML metadata files in a complete JavaEE application.

Thanks to this tool, a lot of projects (mainly ERPs and CRMs) have been able to implement in a very short time (approx, 80% that with other methodologies and tools).

Languages

First language: Spanish

UnderstandingSpeakingWriting
ListeningReadingSpoken interactionSpoken production
EnglishB2C2B1B2C1