I am highly skilled engineer and manager, who not only see the big picture, but can design and implement it, with excellent analytical and problem-solving skills, solid experience in service development, design of distributed systems, high availability database designs, data conversion, migration and integration of databases. Expertise knowledge in data mining, ingestion, consumption, disaster recovery and core analytics solutions. Extensive hands-on experience in Big Data migration projects, Data Analytics, Data Modeling and ETL. I have a huge experience(over 15 years) in running technical teams from software developers, system and network administrators, and can be able to quickly evaluate project needs and provide appropriate solutions in a timely manner. I developed a lot of, cloud based applications and projects for telecom companies like (A1, Telenor, Vivacom, Nexcom ...), which include plan, design and develop elements supporting B2B services, working closely with external solution and delivery partners. The most interested projects: Cloud Call Center Software for SaaS Integration a web based (CRM|ERP|...) systems with Asterisk PBX Data transformation system (ETL) Cloud PBX, IVR, Queue Software for SaaS Cloud invoice and billing system for SaaS Webrtc2SIP gateway for SaaS Similar service like Viber and Skype via WebRTC A.I. Dialer (pre-dictive, power, agentless, preview) Call routing and billing system Network and service monitoring system Telenor Bulgaria fix network VoLTE Conferencing system Realtime call transcription Call tracking system MCU Video Conferencing system Chrome phone extension for CRM|ERP|... integration My expertise: Operating Systems Linux, Unix (*BSD, Solaris, HP-UNIX), Windows, Cisco IOS, Mac OS, Android Telecommunications Asterisk, Kamailio, OpenSIPs, Cisco AS, Cisco IVR Virtualization and Containers VmWare, Proxmox, KVM, Vbox, Docker, LXC Network protocols VoIP (H323, SIP,MGCP, RTMPx), PSTN(ISDN, SS7, ITP, MAP), SNMP, SSH, DNS, POP3, IMAP, SMTP, FTP, HTTP, NFS, SSL, DHCP, BGP, OSPF, RIP Programing Languages JAVA (SE, EE, Spring, JDBC, JPA, JPQL, JSF, JSP, Servlets, Applets), PHP(3, 5, 7), JavaScript (jQuery), SQL(PLSQL, PGSQL), C / C++, Html, SSML, VXML, TCL-IVR, CSS CI/CD Ansible, JenkinsX Architectures REST, SOAP, WSDL, RPC, Microservices, Pub/Sub, Data transformation DB and MB PostgreSQL, MySQL, Oracle, Mongo, InfluxDB, Redis, RabbitMQ, Kafka ETL Apache NiFI Application Servers Apache, Sun GlassFish, Jetty, Tomcat Version control GIT, SVN, CVS Development environments Eclipse, IntelliJ IDEA, Android Studio, Atom