skybert — Torstein Krause Johansen
Senior programmer and admin with strong skills in Unix, Java, Python, BASH and REST.
Loves complex Unix and Linux systems comprised of HTTP servers, web caches, load balancers, distributed memory caches, databases, LDAP, IAMs and application servers. Making them all play together is a treat.
Enjoys developing Java and Python applications, taking a keen interest in open standards like HTTP, HTML, XML and CSS.
Significant experience with app security, integrating it with CI/CD and securing systems with Identity Access Management backends.
- DNB, Staff Software Engineer, 2025 →
- Stibo DX, System architect, 2015 → 2025
- Conduct AS, Senior consultant, 2013 – 2015
- Escenic, System architect, 2008 – 2013
- Escenic, Senior consultant, 2005 – 2008
- CoreMedia AG, Technical Consultant, 2004 – 2005
- Splendid Internet GmbH, Developer, 2003 – 2004
- Opera Software, Intern, 2001 – 2002
- MSc Human Resource Management, The University of Stirling, 2002-2003
- BSc Computer science, Østfold University College, 1999-2002
- Business English, Østfold University College, 1998-1999
--norwegian Norwegian is my mother tongue
--english I took my master's degree in Scotland and have had English as my working language for more than 12 years.
--german Have lived in Germany for 2.5 years and have worked in German speaking countries for a total of 4 years.
--mandarin Good oral skills in Mandarin Chinese for every day conversation.
--programmer Love creating programs to solve problems for our users.
--architect Enjoy thinking big, focusing on how systems talk to each other, the input and output format flow and security.
--educator Love teaching, sharing what I know and helping others.
- Linux: Debian, Ubuntu, RHEL, CentOS, SuSE, Arch
- UNIX: HP-UX, Solaris, FreeBSD, OpenBSD, macOS
- Java: JAX-RS, JPA, XOM, Lombok
- Python: Flask, jinja2, lxml, PyYAML, requests
- IAM: OAuth2, OpenID Connect, Keycloak, Gluu, Okta, Azure AD
- Database: Oracle, MySQL, Percona, MariaDB, PostgreSQL, Derby
- In-memory: Redis, Hazelcast
- LDAP: OpenLDAP, Active Directory
- Web: Apache, Nginx, lighthttpd, Varnish, Squid
- BASH: sed, awk, curl, jq
- Containers: LXD, Docker, Kubernetes, Openshift
- Virtual: KVM, VirtualBox, VMware
- Network security: Burp suite, nmap, dig
- Device security: nftables, iptables, LUKS, ssh
- App security: Sonarqube, OWASP
- Allow running Linux on work machine
- Allow contributing to open source
- Send to conference every now and then
- Impatient
- Prefers dark office
- Loves mechanical keyboards