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@nikolakolev
Membro desde 25 de outubro de 2009
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nikolakolev

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Greetings, I am a systems engineer and head of IT in an international company, with more than 9 years of professional experience. Proud father! During the years I gained many skills, but the ones I am proud of are the self discipline and deep technical analyzing & problem solving thinking.
$20 Dólares/hora
7 comentários
3.2
  • 55%Trabalhos concluídos
  • 100%No Orçamento
  • 69%Pontualmente
  • N/ATaxa de Recontratação

Portfólio

Comentários recentes

  • imagem de Alexandru V. JOOMLA EXPERT!HELP with Listbingo extension and CB component $120.00 USD

    “Very good communication but was unable to complete the project, apparently it was not his projects but I still recommend this freelancer !”

  • imagem de titorvis Make changes to JomSocial + Joomla $130.00 USD

    “Work delivered like promissed. Great communicator, on time and really professional. Would definitively hire again.”

  • imagem de drrobfisher Joomla and Virtuemart Ad Hoc Customisations $38.00 USD

    “Nikola is a delight to work with. Meticulous project planning, time taken to understand the extact nature of the problem(s) we had, careful layout of the proposed solution and then thorough carrying out of the agreed programme of work. Simply excellent; very happy, high levels of customer care and support. We will certainly be using him again.”

  • imagem de runweb Virtuemart Theme Improvement $35.00 USD

    “Very friendly and fast - uncomplicated - will come back to you for further projects.”

  • imagem de LocalComputerGuy Joomla Template $50.00 USD

    “very good communication, very good skills, will definitely use again!”

  • imagem de hitekllc NEEDED: Joomla Errors Fixed [Sealed]

    “Great communicator, great troubleshooter, great provider...highly recommend. Will definitely invite to future projects.”

Experiência

Cloud operations manager

Aug 2016 - Aug 2017 (1 year)

Well balanced technical & management position requiring variety of soft skills Coordinating and writing internal processes and procedures. Setting relevant goals & objectives to the team and it's members. In charge of the Information Security team in the company (formal CSO) Doing regular employee security awareness trainings Ensuring smooth operation of the infrastructure In charge of a very complex hiring process including background checks, pre-screening processes and other.

Technical Team lead

Feb 2015 - Aug 2016 (1 year)

As a technical team leader of the 2nd level it team at Safecharge, I was responsible for a team of 5 it professionals, working on 24/7/365 shift pattern and ensuring maximum system availability. - Guiding team members and providing them with the needed technical training, writing technical documentation and providing availability reports. - Leading the hiring process for the team - Doing yearly PDRs, setting goals & objectives

Senior Systems Administrator

May 2013 - Aug 2017 (4 years)

- Responsible for a complex infrastructure which is providing online payment system. - Ensuring maximum availability of the payment system and all corresponding servers behind. - Providing 2nd and 3rd level support, including out of working hours. - Administering Glassfish servers, Apache, MySQL, ldap ,mail & name servers. - Organising backups and their recoverability. Deploying applications, debugging errors and application behaviour. Administering live and non-live RHEL linux environments.

Systems Administrator

Aug 2011 - May 2013 (1 year)

Monitoring all company websites and other server systems to ensure smooth functioning and availability. Diagnosing and deciding about the most appropriate solutions on disasters, taking actions required in ensuring the availability of key applications. Ensuring all systems backups are undertaken and completed successfully. Managing and applying systems updates. Regularily analysing of systems to ensure they are capable for future planning capacity and functionality. Administering a large number of web

Systems Administrator

Jun 2009 - Jul 2011 (2 years)

Providing remote customer support for a large number of end users. Building and supporting Linux/UNIX based servers helping small and mid business clients to ensure their IT strength. Providing file and remote access servers, Web and Mail hosting servers, highly secure virtual private networks, VoIP servers. Building high speed computer networks, configuring network equipment. Optimizing computer networks and ensuring their availability thru load balancing procedures. Developing and supporting PHP +

Educação

Telecommunications Bachelor

2009 - 2013 (4 years)

Qualificações

Cisco CCNA (2007)

Cisco

null

Publicações

DNS Poisoning

What is DNS Spoofing / DNS cache poisoning? Each ISP gives users DNS server. If you've already read the article above, you know that DNS-s are like translating machines. DNS-s on your provider does not know all the domain names that exist, instead they consult other DNS servers higher up in the hierarchy. If they do not know the answer, forward the request up and so leads to the top level. To date, the top level are 13 servers that are perhaps the most important on the Internet. They are called root ser

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