Created software for an MVNE, with focus on online, real-time charging solutions for Camel, Diameter and SMPP based applications, as well as performing their setup and integration. Created USSD-based services (such as money and airtime transfer) and online real-time provisioning tools for various platforms, such as HLRs and voice soft-switches. Wrote and maintained various online REST APIs for MVNOs. Also wrote web applications for e-commerce and CRM, an OTA update utility for multi-IMSI SIM cards and various internal micro-services.Created and set up a VMWare and Xen based HA-Clusters and maintained a small (~150 hosts) datacentre infrastructure. Worked as a head linux sysadmin and DBA. Led a small development team.

Wrote software for web based applications for an MVNE (such as customer management, CRM, e-commerce platforms, self-care software, real-time reporting tools), as well as built various online charging solutions for Camel, Diameter and Kannel based applications, with a focus on multi-IMSI products. Managed several Camel/Diameter/SMSC/SMPP integrations with various MNOs. Also created online (and offline) provisioning tools for real-time subscriber provisioning on various platforms (HLRs, voice soft-switches, SIP servers) and created various SOAP/REST APIs for 3rd party integrations.Set up a VMWare-based locally clustered virtualisation solution and worked as the head Linux sysadmin, as well as the head DBA.

Maintained and developed web- and e-commerce platforms for an online brokerage company.Set up a local, virtualised web hosting infrastructure and worked as a linux sysadmin and a DBA.

Developed web-based applications for an international MVNO, with focus on an e-commerce platform build, online account management and development of various CRM tools.

Worked as a flash application developer, including web-based interactive flash game design and programming.