Sergio Talens-Oliag

September 2023

Personal information

  • Name and Surnames: Sergio Talens-Oliag

  • Place and Date of Birth: Valencia, August, 12th, 1971

  • Telephone number: (+34) 647 73 82 60

  • E-Mail: sto@mixinet.net

Academic Background

  • Graduate In Computer Science by the Universidad Politécnica de Valencia (http://www.upv.es/).

  • A.B.D. on the program named Distributed and Parallel Computation of the Departamento de Sistemas Informáticos y Computación (http://www.dsic.upv.es/) of the Universidad Politécnica de Valencia.

  • Obtained the Advanced Studies Diploma (D.E.A.) on the PhD program called Interdisciplinary Doctorate in Communication of the Departamento de Teoría de los Lenguajes (http://www.uv.es/teolen) of the Universitat de València (http://www.uv.es/).

Professional Experience

  • Senior DevOps Engineer for Intelygenz, March 2023 to present.

    https://intelygenz.com/

    Tasks:

    • Collaboration in the implementation of development and production infrastructures on cloud platforms (mainly AWS) using tools such as terraform or helmfile manually or programmatically.

    • Testing, evaluation, configuration and deployment of tools and services related to kubernetes clusters (cert-manager, eks, external-dns, grafana, prometheus, vault, etc.).

    • Testing, evaluation, configuration and deployment of tools and services linked to applications (cassandra, kafka, postgres, redis, etc.) for local environments (using containers) or in kubernetes clusters.

    • Configuration and maintenance of continuous integration systems (Gitlab CI, Github Actions) to manage the infrastructure lifecycle, applications, libraries and documentation repositories.

    • Development and modification of code in multiple programming languages for task automation or bug resolution (bourne shell, python, nodejs, golang, java, etc.).

    • Support development teams in the use of continuous integration systems and tuning of infrastructures for different application deployment environments.

  • Senior DevOps Engineer for Kyso Operations Europe Limited, January 2022 to September 2023.

    https://kyso.io/

    Tasks:

    • Help on building the self-hosted version of Kyso that is delivered to enterprise clients.

    • Kyso application packaging for distribution (docker images, AWS marketplace images, etc.).

    • Support enterprise clients during product release and update cycles.

    • Write guides to setup Kyso on enterprise deployments.

    • Build images following security best practices.

    • CI/CD and Development Systems and Tools management and mainteinance.

  • Consultant for Curelator Inc. on the Backend Development Team. August 2021 to January 2022.

    https://n1-headache.com/

    Tasks:

    • Implement new features and maintain the backend codebase.

    • Participate in code reviews.

    • Participate in testing and releases to production.

    • Participate in the elaboration of new features and products.

  • IT Senior Operations Architect at Agile Content, S.A.. January 2020 to July 2021.

    https://www.agilecontent.com/

    Tasks:

    • Setup of the Continuous Integration and Deployment Infrastructures for the AgileTV platform using GitLab, Docker and Kubernetes.

    • Development of tools to simplify the configuration and deployment of containerized applications using various orchestration tools (initially docker-compose and kubernetes).

    • Configuration and deployment of services required by the platform and general use services (nginx, haproxy, postgresql, prometheus, elk, mysecureshell, …​).

    • Original product platform supervision (headend, origin, DRM systems, CDN and service platform) and cooperation on the design and migration plan to a new platform.

    • System Administration Teams supervision and colaboration for the rest of the company projects (mainly application deployments on AWS for production and on hosted servers for development and pre-production environments).

  • Director of the Information Systems Department (ISD) at the Instituto Tecnológico de Informática of the Universidad Politécnica de Valencia. January 2015 to January 2020.

    https://www.iti.es/

    Tasks:

    • Supervision and coordination of the Systems Administration Team, responsible for the setup and maintenance of the Information Systems of the Institute:

      • IaaS Platforms (OpenStack and Proxmox) and Container Orchestrators (Kubernetes).

      • Common use applications and services management (DNS, DHCP, LDAP, SMTP, IMAP, SAMBA / Active Directory, etc.).

      • Management of third party applications for common tasks (ERP, CRM, eLearning, ticketing, file sharing) and development support (GitLab, Nexus, Testlink, SonarQube, Trac, Subversion, …​).

      • In-house developed applications management (Web Identity Manager, Human Resources Applications, Internal Procedures Management, Issue Management Interface, Intranet static content and news management, Project Execution Manager, …​).

      • Security related tasks (firewalls, backups, VPNs, etc.).

    • Supervision and coordination of the Applications Development and Integration Team, working as project manager, analyst and/or developer in some of them:

      • Project Execution Management Application (Python/PostgreSQL Backend, VueJS frontend): in charge of the project in general and of the initial design and development of the backend and the integration with other services.

      • GitLab, Gitea and GitHub Hook processing system implemented in Golang (https://salsa.debian.org/sto/json2file-go).

      • Multi application LDAP user information synchronization tool (developed using python and ansible, integrated with the hooks system of the web frontend used to manage the LDAP data).

      • Web Identity Service (developed in Python, integrated with LDAP and a Database, provides tools to validate users using HTTP Basic Auth and JWT Tokens).

      • Static Intranet (design and setup of the Continuous deployment system using Jekyll and GitLab).

      • Intranet News Editor (Flask application design, users edit HTML using forms and the system uses git to push and publish using Jekyll and GitLab).

      • Simplified User Interface to the Issue Tracking system (Flask application without database, all the work is done using the CMDB REST API).

  • Part-time lecturer at the Departamento de Informática of the Universitat de València. September 2018 to September 2019.

    https://www.uv.es/dptinf

    Subjects:

    • Theory and practice of the Security course of the Master en Tecnologías Web, Computación en la Nube y Aplicaciones Móviles.

    • Lab practices of the Computer Security course on the Telematic Engineering degree.

  • Part-time lecturer at the Departamento de Informática of the Universitat de València. September 2016 to August 2017.

    https://www.uv.es/dptinf

    Subjects:

    • Lab practices of Computer Science II.

    • Lab practices of Databases and Information Systems.

    • Lab practices of Computer Fundamentals.

    • Lab practices of Computer Networks Fundamentals.

    • Lab practices of Multimedia Networks.

  • Director of the Free Software, Systems And Security Area (FS³A) at the Instituto Tecnológico de Informática of the Universidad Politécnica de Valencia. May 2010 to December 2014.

    https://www.iti.es/

  • Information Systems Manager at the Instituto Tecnológico de Informática of the Universidad Politécnica de Valencia. March 2006 to April 2010.

    https://www.iti.upv.es/

  • Part-time lecturer at the Departamento de Informática of the Universitat de València. January 2004 to September 2007.

    https://www.uv.es/dptinf

    Subjects:

    • Operating Systems Lab practices (second year of Computer Science and Telematics Engineering).

    • Advanced Operating Systems Lab practices (fourth year of Computer Science Engineering).

  • Computer Science Analyst for T-Systems S.A., working full time for the LliureX Project (http://lliurex.net/) in the Conselleria de Cultura, Educació i Esport (http://www.cult.gva.es/) of the Generalitat Valenciana (http://www.gva.es/). January 2004 to March 2006.

    http://www.t-systems.es/

    Tasks:

    • Design, development and maintenance of distribution elements (packages, configuration artifacts, installation systems).

    • Integration with the upstream project (Debian).

  • Computer Security Consultant for Tissat S.A., inside the InfoCentre project (http://www.infocentre.gva.es/) of the Generalitat Valenciana. December 2002 - December 2003.

    http://www.tissat.es/

    Tasks:

    • Security Audits.

    • Monitoring.

    • Configuration and maintenance of security policies.

    • Training.

  • Part-time lecturer at the Departamento de Sistemas Informáticos y Computación of the Universidad Politécnica de Valencia. September 2003 - November 2003.

    http://www.dsic.upv.es/

  • Senior Programmer for Internet Business Constellation (iBC). July 2002 - November 2002, working as analyst and programmer.

    http://www.inetbc.net/

  • Senior Programmer for Intelligent Software Components (iSOCO). June 2000 - July 2002, working as Programmer and System and Network Administrator.

    http://www.isoco.com/

  • Researcher at the Instituto Tecnológico de Informática of the Universidad Politécnica de Valencia. June 1999 - May 2000.

    http://www.iti.es/

  • Collaboration with the Instituto Tecnólogico de Informática in an IMPIVA Project (http://www.impiva.es/). June 1998 - June 1999.

  • Installation and Administration of TCP/IP Networks (Internet/Intranet) and Unix Servers (Linux) for:

  • Other courses taught:

    • Three Introduction to the use of Docker and Kubernetes courses for UPV’s administration and services staff. Unidad de Formación del PAS (UFASU), Universidad Politécnica de Valencia. 2019 - 2020.

    • A course about DevOps with GitLab, Docker and Kubernetes for technical staff of FERMAX. Instituto Tecnológico de Informática. 2019.

    • Two Advanced Linux for Administrators courses for technical staff of Consum Cooperativa. Instituto Tecnológico de Informática. 2016.

    • Two Basic Linux for Administrators courses for technical staff of Consum Cooperativa. Instituto Tecnológico de Informática. 2016.

    • One course about Ubuntu Systems Administration in Active Directory Domains. Instituto Tecnológico de Informática, 2014.

    • Four courses Preparation of the LPIC-1 Certification Exams (Linux Professional Institute Certification Level 1 Certification). Instituto Tecnológico de Informática, 2010, 2011, 2015 and 2016.

    • One course about Technical protection of Software. Instituto Tecnológico de Informática, 2008.

    • One course about Java Securty. Instituto Tecnológico de Informática, 1999.

    • One course about Design and Layout of Publications. La Nau dels Estudiants (Universitat de València), 1997.

    • Four courses about C++ Programming. Escuela Universitaria de Informática (Universidad Politécnica de Valencia), 1994-1996.

    • One course about Introduction to C++ programming for the Macintosh. Master de Artes Gráficas of the Universidad Politécnica de Valencia, 1994.

Publications, talks and participation in Congresses and Conferences

Participation in Projects

  • CSIRTCV. Puesta en marcha del Centro de Respuesta ante Incidencias de Seguridad Informática de la Comunidad Valenciana dependiente de la Consellería de Justicia y Administraciones Públicas de la Generalitat Valenciana, 2006-2009.

  • Design of the gvSIG projects colaborative infrastructure. Design and deployment of the colaborative work enviroment for the gvSIG of the Consellería de Infraestructura y Transporte, Generalitat Valenciana, 2006-2009.

  • LliureX. Development on the initial versions of a GNU/Linux distribution for the Conselleria de Cultura, Educación y Deporte, Generalitat Valenciana, 2004-2006.

  • MEDIM (Minería de Datos Estructurados basada en Distancias y Métricas, Structured Data Mining based on Metrics and Distances). R&D project funded by the Generalitat Valenciana, 2004-2005.

  • Autoría y Contenidos en la Red (Authorship and Contents in the Net). R&D project funded by the Generalitat Valenciana, 2004-2005.

Other activities

  • Developer of the Debian Project.

    http://www.debian.org/

  • Design and layout of the series Documentos de Trabajo (Eutopías), Centro de Semiótica y Teoría del espectáculo, Universitat de València & Asociación Vasca de Semiótica, 1988-1998.

    http://www.uv.es/eutopias/

  • Design of the HTML pages of the Ediciones Cátedra web server, 1997.

    http://www.catedra.com/

Languages

  • English: high level, written and spoken.

  • Catalan/Valencian: high level, written and spoken.

Computer Science Related Knowledge

  • Operating Systems: UNIX, Windows and MacOS, at user, administrator and programmer level.

  • Programming Languages: Python, UNIX Shell, C, Rust, Golang, C++, Java, JavaScript / ECMAScript (nodejs).

  • Experience in integration, installation, configuration and mainteinance of all kind of services, basically running under UNIX like systems and using free software:

    • Backup Systems (borgbackup, restic, rdiff-backup, backupninja, etc.),

    • Configuration Management Systems (saltstack, ansible, etc.),

    • Content Management Systems (joomla, drupal, plone, etc.),

    • Databases (postgresql, mysql, etc.),

    • Directory Services (openldap, pam_ldap, nss_ldap, etc.),

    • Domain Name Services (bind, powerdns, dnsmasq, etc.),

    • E-Mail Services (postfix, dovecot, mailman, etc.),

    • IaaS Platforms (openstack, proxmox, etc.) and Container Orquestation Tools (kubernetes),

    • Monitoring Tools (monit, icinga, zabbix, etc.),

    • Network Filesystems (CEPH, nfs, samba, gfs, etc.),

    • Project Management Tools (gitlab, gitea, trac, redmine, gforge, etc.),

    • Static Website Generators (jekyll, ikiwiki, hugo, etc.),

    • Version Control Tools (git, subversion, mercurial, etc.),

    • Virtualization Tools (kvm, lxc, docker, virtualbox, openvz, etc.),

    • Web Servers (nginx, apache, lighttpd, etc.).

  • Unix/Linux Security Tools:

    • Firewalls (ipchains, iptables, nftables, pf),

    • Intrusion Detection Systems (snort, integrit, logcheck),

    • Network Monitoring Tools (ntop, ipaudit),

    • Security Scanners (nessus, openvas).

  • High Availability and Fault Tolerance Systems:

    • Linux-HA (hearbeat, mon, drbd, …​),

    • Load Balancing (lvs),

    • RedHat cluster suite (cman, rgmanager, clvm, …​).