8 февруари, 2023

Sofia, valid until 06 April 2022

А1 Bulgaria provides digital services and business solutions to its customers counting on a team of proven and experienced professionals. Our IT solutions and services gain increasingly higher importance and we rely on a team of more than 250 professionals in IT and Digital Transformation Area. Our mission is to Empower Digital Life for our customers and the society.


  • Building, testing, deploying, analyzing, administering, and maintaining enterprise F5 Platforms with a focus on Reverse Proxy, Authentication,
  • Monitoring & Protection (RAMP) services.
  • Configuring, conducting, and managing the F5 LTM module.
  • Configuring and maintaining the F5 ASM/AWAF module (security policies, updates, new applications integration…).
  • Develop, maintain and optimize customized F5 iRules and scripts.
  • Assist application developers and enforce secure coding best practices.
  • Technical testing of significant maintenance, operational, upgrade activities and process enhancements/updates.
  • Automating configuration and implementation activities.
  • Design, deliver and support the integration layer between operating systems and business applications.
  • Integration of web application in the Web Infrastructure for client’s infrastructures.
  • Share knowledge with colleagues on technology subjects, solutions and best practices on vendor specific and also on generic security components.
  • Establish and document installations, guidelines, policies and procedures for relevant stakeholders.
  • Set and enforce compatibility and interoperability standards that ensure site accessibility for all users.
  • Monitor and report on Web site traffic and performance.
  • Perform a pre-sales/consultancy meeting with clients.


  • 1 year experience in Cybersecurity field.
  • HTTP Protocol mastery.
  • Experience with F5 BIG-IP architecture.
  • Experience with Web Application Firewall (WAF) solutions preferably F5 ASM/AWAF.
  • Knowledge with iRules logic.
  • Knowledge with WAF Solution Design is required.
  • Web Application knowledge:
  • OWASP top 10 (XSS, CSRF, SQL Injection, RFI, LFI, etc.)
  • HTTP request parts (URL, URI, parameters, headers, body)
  • HTML DOM parts (head, body, script tags)
  • Web Application components (front-end/back-end)
  • AJAX
  • Penetration testing experience is highly appreciated, but not mandatory.

Why should you apply:

  • Best of both: Stability of a successful company with innovative methods;
  • Modern working atmosphere and central office;
  • Friendly, ambitious and motivated team of professionals;
  • Constant learning according to personal potential and company needs;
  • Challenging assignments and career development opportunities in multinational environment;
  • Attractive remuneration package and fringe benefits;
  • Flexible working schedule and opportunity for home office.

Make it happen! Develop yourself further with us & Unlock Your Talent!

Apply now!

If you need further information about the position, please contact Diana Panteleeva /diana.panteleeva@a1.bg/.

The social benefits for this position are:

Deadline for applications: 06 April 2022
Only shortlisted candidates will be contacted.