Jens Callsen work email
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Jens Callsen personal email
I am an experienced SW developer for embedded mobile communication systems.I have gained both broad architectural knowledge and detailed debug experience in the fields of- embedded system SW- realtime operating system- telecommunication standards 2G, 3G, RTP, TCP/IP, TLS, SRTP- local connectivity standards such as BT, USB and WiFI- HW/SW interface debugging- memory handling- performance optimisation with focus on power management- C/C++, Qt, QML and iOSI have linked our local project management with developers across multi-cultural international sites, standardization test houses and with network operators. I have well developed and trained soft skills in- agile methods- collaboration- tutoring- communication- guidance and technical co-ordination
Dencrypt A/S
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Solution ArchitectDencrypt A/S Feb 2024 - PresentSolution Architect matches my daily work much better. Focusing in the development of core components on client and server side to make a service work as a whole.Additionally, I am very much engaged in the integration of our communication solution with a Cisco SIP communication system and a PEXIP conference solution.
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Chief Technology OfficerDencrypt Dec 2013 - Mar 2024Hvidovre, Danmark, DkImplementing Dencrypt's patent pending dynamic encryption and integrate it into Dencrypt's VoIP client. Additionally, I am engaged in many details in productisation: - Making an iOS app to work with certificates that are signed by custom root certificate- TLS client authentication with custom root certificate- Deploy Mobile Device Management for Apple's enterprise in-house distribution and to push custom root certificate to Dencrypt application only.- Easy and quick provisioning server solution to setup the app.- Handling of US export regulation for non-standard encryption SW productsBesides these developer tasks, customer relationships getting more and more important and it is great to see how our stuff works for them.Significant focus on Common Criteria EAL 4 SW structuring and documentation for the Dencrypt application. -
Partner, Principal EngineerAqtiw Mar 2012 - Dec 2013I want to form the visions and needs of our business partners into high quality apps - my personal focus is QML, Qt and Android.
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Senior Sw Design Engineer In Symbian Smart PhonesNokia Danmark Nov 2008 - Mar 2012Espoo, Southern Finland, Fi- In the beginning, error manager activities on E5- Analysing and improving power consumption of N8- Debugging support for Symbian 3.2 products- SW Investigation of "dead" phones from end customers.- MS Excel macro to make GenIO configurations more human readible- Debugging and maturing a cool new Symbian phone :-) -
Senior Sw Design Engineer In S40, Co-Ordinator RolesNokia Danmark Nov 2007 - Oct 2009Espoo, Southern Finland, FiGeneralist in Low Level Team- Features with strong dependency to HW, e.g. audio- Performance testware creation- Evaluating and following up on system stability.- Co-ordination of local activities on system stability- Co-ordination of requirements integration- Co-ordination of error fixes releasing and verification- Technical co-ordination with release teamGlobal Integration Co-ordinator- Technical co-ordination of the global feature responsibles.- Process definition on global level- Process implementation on local level- Techical guidance and mentorship in the feature areas- Stepping in debugging and error if needed- Feature focus: Video, Audio and Personalisation
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Senior Sw Design Engineer In S40, Technical RolesNokia Danmark Apr 2002 - Sep 2007Espoo, Southern Finland, FiGlobal Feature Team- Focus on generic SW part to gain global effiency- Thus, all S40 phones of the same timeline are handled- Feature focus: Video calls and streaming- Feature integration and configuration- Error process handling- Tracing and debuggingPaternity leave with my daughter (6 months)Maturing/System Team- Feature focus: 2G, 3G, SMS, MMS, calls, streaming- Limited to local products as 6230 or 6280- Error Process Handling- Tracing and debugging- Trace co-ordination with Field testing- Error investigation together at operator's location- Bug fix co-ordination with release team- Testware creation for messaging featuresPaternity leave with my son (7 months)Protocol Team- Release and regression Testing of a mobile phone.- Building and maintaining GSM test environment- Tracing and Debugging protocol errors
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Protocol Integration And Requirement EngineerNokia, Ulm/Germany Aug 1997 - Mar 2002- Requirements engineering for mobile phones. (For AEG which became Matra/Nortel Communications)- Requirements engineering for traffic products for Opel cars (when Nokia took over from AEG and Matra/Nortel) - WAP over SMS integration- GPRS integrating for US GSM band
Jens Callsen Skills
Jens Callsen Education Details
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Ulm UniversityElectrical Engineering -
University Of OttawaElectrical Engineering
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University Of BremenElectrical Engineering
Frequently Asked Questions about Jens Callsen
What company does Jens Callsen work for?
Jens Callsen works for Dencrypt A/s
What is Jens Callsen's role at the current company?
Jens Callsen's current role is Solution Architect at Dencrypt.
What is Jens Callsen's email address?
Jens Callsen's email address is je****@****gmx.net
What schools did Jens Callsen attend?
Jens Callsen attended Ulm University, University Of Ottawa, University Of Bremen.
What skills is Jens Callsen known for?
Jens Callsen has skills like Embedded Systems, Mobile Communications, Embedded Software, Mobile Devices, Gsm, Debugging, Software Design, Bluetooth, Tcp/ip, 3g, Testing, Telecommunications.
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