Software Engineer – Network & Security Focus

Designing, implementing, and maintaining network/security features (firewall, NAT, proxy, intrusion prevention, filtering)
Integrating with kernel or low-level modules (netfilter, packet capture/forwarding logic)
Building advanced traffic inspection and filtering logic (URL filtering, protocol analysis, deep packet inspection)
Troubleshooting complex network failures (asymmetrical routing, NAT/firewall interactions, dropped reply traffic)
Collaborating with architects, QA, and other engineers on secure network systems
Reading and applying protocol & security specs (IP, TCP, HTTP, SSL/TLS)
Ensuring performance, security, and robustness in production environments

Strong programming skills, with approximately 50% in C/C++ for low-level modules (embedded) and 50% in Python
Solid foundation in computer networks: IP, TCP/UDP, routing, NAT, proxy patterns
Deep understanding of firewall/security systems: packet filtering, stateful firewalls, URL filtering, IPS/IDS
Experience debugging tricky traffic flows (traffic goes forward but reply doesn’t return)
Ability to implement or consume proxy, inspection, HTTP/HTTPS parsing
Experience with kernel-level or system-level network hooks/modules (Linux netfilter, packet sockets)
Good command of English (B2 level or higher)

Experience with firewall vendor software (iptables, nftables, Palo Alto, Fortinet, Cisco ASA)
Familiarity with SSL/TLS termination and proxy SSL inspection
Knowledge of IDS/IPS systems (Snort, Suricata)
Experience in high-performance networking systems
Familiarity with container/virtualization networking
Exposure to distributed or scalable systems

Flexible working hours and approach to work: fully remotely, in the office or hybrid
Professional growth supported by internal training sessions and a training budget
Solid onboarding with a hands-on approach to give you an easy start
A great atmosphere among professionals who are passionate about their work

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