Per Steffensen Email & Phone Number

Denmark

CTO at this spin-off startup. Everything is typically on a need-to-know basis in the industry we support, so there is not much I can share about the purpose of the software we build.Duties and responsibilities:Overall responsibility of all software solutions - architecture, design, implementation, test, delivery, deployment, etc.Achievements:Development of numerous backend microservices and a modern web-application for user-interactionPutting together selections of the microservices and the web-application to tailor full systems fulfilling the individual needs of each customerDevelopment of a framework for streaming many independent logical streams of data via fewer Kafka partitions - by multiplexingDevelopment of a framework for streaming via GridFS files. Storing files in the distributed file-system, while enabling readers to stream from the files, while they are being writtenReceiving data from 3rd-party provides via (S)FTP and/or TCP/UDP-streams. Streaming via forwarders, adapters, processors and databases/storage. Pushing to web-application presenting to users with only few seconds delay.Technologies usedJava, Scala, Spring (Boot), REST, RabbitMQ, MongoDB (incl GridFS), Kafka, Kafka Connect, Netty, Docker (swarm), Node.js, JavaScript, Meteor, Angular, HTML5, CSS3, LESS, ELK (Elastic, Logstash and Kibana), Prometheus, Grafana, Bash, JSON, XML, YAML, and many more

Independent IT consultant. Participate in IT projects as tech-lead, architect, developer, advisor, mentor etc. See other entries to learn about particular customers and projects.

Århus Area, Denmark

Software developer and architect, in one of the companies behind the "working community" called "Fellow"

Software developer and architect. Mentor. Everything is typically on a need-to-know basis in the industry we support, so there is not much I can share about the purpose of the software we build.Duties and responsibilities:Participate as developer and architect in numerous software projectsMentor less experiences colleaguesBuild an entirely new software-company in an exotic country without much tradition in the software-area. A company that will eventually be able to continue the development of the software without help from the outside (e.g. me)Achievements:Development of several big software systems. Delivery and production supportSystem A: Data reception and processing. JavaEE backend. Presentation in Swing-based user-interfaceSystem B: Retention system holding and serving enormous amounts of data. In one of our deployments, the system was receiving, storing and indexing more data-records per day than Twitter does. Optimised queries to serve data quickly to users on demand.System C: New version of System A, developed from scratch. Microservices. Docker. Streaming. Web user-interface.Development on our own version of Apache Solr (called Voyagr). Added several features. A bunch of performance optimisations. Unfortunately I was only able to hand a few of the initiatives back to Apache Solr.Big data processing. Natural language processing.New software company built and now able to handle everything themselvesTechnologies used:Java, JavaEE, Scala, Spring (Boot), REST, Dropwizard, RabbitMQ, Active-MQ, MongoDB (incl GridFS), MySQL, MariaDB, PostgreSQL, Apache Solr (Cloud), ElasticSearch, Cassandra, Hadoop, MapReduce, HBase, HDFS, ZooKeeper, Kafka, Kafka Connect, Netty, Jetty, Tomcat, JBoss EE, Glassfish EE, Docker (swarm), Swing, JavaFX, Node.js, JavaScript, GraphQL, Meteor, Angular, HTML5, CSS3, LESS, React (Native), ELK (Elastic, Logstash and Kibana), Prometheus, Grafana, Bash, JSON, XML, YAML, Groovy, Ansible, Chef, Vagrant, Citrix Xen, VirtualBox ...

Joined Jyske Bank team as a consultant from TriforkDuties and responsibilities:Developer and java mentor on project e-tinglysningAchievements:Development of backend system to interface (via MQ message exchange) to the Danish central system for land registration and to Jyske Bank user-interfaceDevelopment of system to help testers update and validate their test-data according to the schemas that changed very often during developmentTechnologies used:Java EE, WebSphere, Spring, JSF, MQ, and many more

I have been working as a consultant. Se separate position descriptions.Also teaching courses on software development and specific different technologies. External companies, like e.g. Nykredit and Novo Nordisk, hired Trifork to host courses. I was among the ones that taught on those courses. A.o. courses about Java in general, Java EE and Struts.

Joined Acure/IBM as a consultant from TriforkDuties and responsibilities:Developer and architect on several projectsAchievements:Development of system for Lægemiddelstyrelsen (central drug governing in Denmark) for equalisation between pharmacies in Denmark. The ones with the highest profits give parts of that profit to the ones with the lowest profits, in order to be able to keep pharmacies in less attractive areas survive, so that we can have good coverage of pharmacies all over the country.Architect on project "receptserveren" (prescription server) - a central spot where all prescriptions in Denmark (since January 2007) is registered and controlled online. Doctors send prescriptions to the receptserver. Pharmacies will check and register with the receptserver before they are allowed to hand out drugs. It handles more than 250.000 transactions in a busy hour.Technologies usedJava, Java EE, Trifork EE server, Oracle RDBMS, AIX, and many more

Duties and responsibilities:Software developer at Nykredit ITAchievements:Development of several system related to banking, mortgage credit and real estate (e.g. www.nykredit.dk and www.nybolig.dk)Technologies used:Java, J2EE, WebSphere, EJB, JDBC, SQL, JSP, Servlets, Struts, XML, XSLT, JavaScript, HTML, CSS, and many more

Århus Area, Denmark

While taking my Masters in Computer Science I had several different side-jobsAchievements:Teaching Java at nightDevelopment of system for Zoological Institute, Aarhus University. Analysis of animal behaviour based on video recording of animals in caves and terrariumsDevelopment of system to predict stock development, based on previous stock price, events, etc.Technologies used:Java, Delphi

Master, Computer Science And Math

Bank Clerk, Eventhing Related To Banking