Senior Network Engineer

Employment: Full-time Experience level: Mid-Senior Level Job Description Tieto Tech Consulting (MentorMate from 2001 to 2026) provides design-led, data-centric, and AI-powered digital engineering & consulting services to enterprises worldwide. With a strong heritage of Nordic quality, local presence, and global-scale operations, we are backed by 8,500+ IT professionals. Our clients trust us for advanced data and analytics skills, top industry-specific expertise, specialized software R&D, and the capabilities of a multinational team. We are part of Tieto, a leading technology company with an annual revenue of approximately EUR 2bn.     Tieto Tech Consulting’s team in Bulgaria consists of 500+ professionals specializing in the development of tailored digital solutions in diverse industries. We are looking for an experienced Network Engineer to join a team responsible for designing, implementing, maintaining, and supporting complex network and security infrastructure. The role focuses on ensuring the stability, performance, and security of enterprise network environments, troubleshooting network-related issues, and delivering reliable connectivity and security solutions.  Key Responsibilities Design, configure, implement and operate complex network and security solutions Troubleshoot LAN, WLAN, WAN, VPN, Firewall, NGFW solutions Patch management of network solutions Network performance and capacity monitoring and improving Secure network systems by establishing and enforcing policies, standards and guidelines Report on network operational status by gathering and prioritizing information Remote support of on-site engineers and end users/customers Required experience & qualifications 5+ years of experience in network administration 5+ years professional experience maintaining Cisco or Fortinet or Check Point Next-Gen Firewall environment Ability to quickly explore, examine and understand network problems and how it affects a customer’s business Experience in the use of network monitoring tools with a strong understanding of network protocols Solid understanding of L2/L3 protocols (deployment and troubleshooting) such as STP, LACP, L2 security, 802.1x, OSPF, BGP etc Solid understanding of TCP/IP stack protocols (DNS, DHCP, SMTP, SNMP, ICMP) On-hands experience with Wireless services (deploying and troubleshooting) Understanding of VPN solutions and encryption services Basic understanding of Windows/Linux OS operation Excellent troubleshooting skills, a customer-focused mindset, and the ability to communicate effectively in English A significant advantage would be Cisco CCNP Enterprise certification Fortinet NSE 4 certification Check Point CCSA certification Experience with any of Azure, AWS or GCP public clouds (AZ-700 certification or equivalent will be a plus) Meraki cloud deployment experience Automation skills (Python/Bash scripting, API calls programming, Ansible, Terraform, etc.)   Additional Information At Tieto, we believe in the power of diversity, equity, and inclusion. We encourage applicants of all backgrounds, genders (m/f/d), and walks of life to join our team, as we believe that this fosters an inspiring workplace and fuels innovation. Our commitment to openness, trust, and diversity is at the heart of our mission to create digital futures that benefit businesses, societies, and humanity. Diversity, equity and inclusion | Sustainability | Tieto Stay alert to recruitment scams: • Tieto only communicates via  @tieto.com  email addresses. • We never ask candidates to pay fees or share financial details during recruitment. • If you receive a suspicious message claiming to be from Tieto, don't respond — verify it via our official careers site. • For more information visit  Important Advisory Regarding Recruitment Fraud | Tieto Blog