Senior Network Engineer

Randstad Polska Sp. z oo; Warszawa; On-site; PLN 210,000 - 290,000; Full time

Benefits offered by this job

Annual performance bonus up to 7%

Medicover private medical care (family

Medicover Sport card

Flexible working hours

Language courses

Professional certification training

Job summary

Randstad Polska Sp. z oo is seeking an experienced Network Architect to bridge high-level design with robust security engineering across global LAN/WAN/WLAN and security domains.

You will own HLD/LLD, drive infrastructure optimization, and lead MSP collaborations. Strong Cisco/FortiGate expertise, CCNP or equivalent, and English proficiency are required for international collaboration.

Qualifications

• Minimum 5+ years of hands-on experience in enterprise-scale network and security design.
• Deep proficiency in TCP/IP, BGP, OSPF, STP and Cisco enterprise products.
• WAN/SD-WAN deployment, optimization, and advanced troubleshooting.

Responsibilities

• Design, test, and develop enterprise-wide network and security infra across LAN/WAN/WLAN.
• Serve as primary technical consultant translating business needs into scalable HLD/LLD solutions.
• Enforce network security policies, Fortinet FW rules and secure remote access with global teams.
• Provide SME leadership to external MSP, validate LL designs, steer escalations (P1/P2).
• Drive IT processes and IaC initiatives within an Agile team.

Skills

Network architecture

WAN/SD-WAN expertise

Firewall & security

English communication

Analytical mindset

Education

Cisco CCNP or equivalent

Tools

Fortinet FortiGate

Cisco IOS

DNS/IPAM/AAA

Job description

Join a global enterprise team dedicated to shaping the future of international IT infrastructure . In this high-impact role, you will bridge the gap between high-level architectural design and robust security engineering across global LAN, WAN, SD-WAN, WLAN, and network security domains .

Rather than focusing on routine operational handling, you will take ownership of High-Level (HLD) and Low-Level Designs (LLD), drive continuous infrastructure optimization, and solve complex, high-tier technical challenges . You will act as a Subject Matter Expert (SME), partnering with our Managed Service Provider (MSP) and cross-functional international teams to deliver resilient, high-performing networks .

What will your tasks involve?

Architecture & Design: Design, test, and develop enterprise-wide network and security infrastructure across LAN, WAN, WLAN, and supporting core services (DNS, IPAM, AAA) .

Business Partnering: Serve as a primary technical consultant translating complex business needs into scalable HLD and LLD solutions .

Security Standards: Enforce network security policies, Next-Gen Firewall rulesets, Web Application Firewall (WAF) policies, and secure remote access protocols in coordination with global cybersecurity teams .

MSP Oversight & SME Leadership: Act as an SME providing technical guidance to our external Managed Service Provider (MSP) . Validate Low-Level Designs, steer critical escalations (P1/P2), and ensure operational consistency .

Process & Automation Enhancement: Drive operational efficiency within an Agile team structure, streamlining IT processes and supporting Infrastructure-as-Code (IaC) initiatives

What we expect from you?

Experience: Minimum 5+ years of hands-on experience in enterprise-scale network and security design, implementation, and troubleshooting .

Core Networking Expertise: Deep proficiency in TCP/IP, BGP, OSPF, STP, and hands-on experience with Cisco enterprise products (Catalyst switches, Nexus switches, routers, and ISE) .

WAN / SD-WAN Mastery: Proven background in WAN and SD-WAN deployment, optimization, and advanced troubleshooting .

Network Security & Firewalls: Strong proficiency with Next-Generation Firewalls—preferably Fortinet/FortiGate .

(Note: If you possess strong core network/SD-WAN background without prior Fortinet experience, we will fully sponsor and support your Fortinet NSE 4 certification within your first 6 months) .

Certification / Knowledge Level: Cisco CCNP or equivalent practical depth (current or expired certifications are accepted) .

Languages & Soft Skills: Excellent spoken and written English (B2+/C1 level) for daily collaboration with global teams . Strong analytical mindset, assertiveness, and team-player attitude in international environments .

Nice to Have

Hands-on experience with Web Application Firewall (WAF) tuning, rule creation, and false-positive mitigation .

Solid understanding of HTTP/HTTPS protocols, web application security (OWASP Top 10), and SSL Inspection .

Experience with hybrid DNS environments (on-premises and cloud integration) .

What you can expect from us?

Bonuses: Annual performance bonus (up to 7%) + festive financial benefits paid twice a year (April & December) .

Health & Security: Comprehensive private medical care (Medicover, with options for family coverage) and group life insurance .

Professional Growth: Full coverage of training courses and professional certification exams (e.g., Fortinet) .

Perks & Wellbeing: Sports card (Medicover Sport), language courses, flexible working hours, and regular team wellbeing activities .

this job offer is intended for people over 18 years of age