{"id":3304594,"url":"https://alion.io/job/codilime-midsenior-software-engineer-network-security-focus","title":"MidSenior Software Engineer – Network & Security Focus","company":{"id":1985033,"name":"CodiLime","domain":"codilime.com","url":"https://alion.io/company/codilime","size_band":"201-500","is_staffing_agency":false,"employer_type":"staffing","is_intermediary":false,"listed_via":null,"ats_vendor":"Teamtailor","truth_index":{"grade":"B","score":80,"open_postings":5,"ghost_share":0,"stale_share":1,"repost_share":0,"time_to_fill_p50_days":19,"computed_at":"2026-10-28T05:59:10Z"}},"role":"Backend","role_family":"Backend","seniority":null,"employment_type":"full_time","work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"board_field","remote_working_hours":null,"hiring_geo_confidence":"inferred","locations":["Cairo, Egypt"],"countries":["EG"],"hiring_countries":["EG"],"hiring_countries_total":1,"salary":null,"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Linux","optional":false},{"name":"Python","optional":false},{"name":"Snort","optional":true},{"name":"Suricata","optional":true}],"status":"live","first_seen_at":"2026-10-25T00:00:00Z","employer_posted_date":null,"last_verified_at":"2026-10-25T00:00:00Z","board_verified":false,"closed_at":null,"days_open":3,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":3},"description":"Get to know us betterCodiLime is a software and network engineering industry expert and the first-choice service partner for top global networking hardware providers software providers and telecoms. We create proofs-of-concept help our clients build new products nurture existing ones and provide services in production environments. Our clients include both tech startups and big players in various industries and geographic locations (US Japan Israel Europe).\n While no longer a startup - we have 250 people on board and have been operating since 2011 weve kept our people-oriented culture. Our values are simple:\nAct to deliver.\nDisrupt to grow.\nTeam up to win.\nThe project and the teamThe goal of the project is to develop core network and security features close to the kernel and network stack. About half of the tasks are in C/C for low-level modules and the other half in Python for automation tooling and integration.\nThe project involves close collaboration with a team from our client. It is globally distributed with members in the USA and India - and now a new team of software engineers is joining in Poland. \nWe work on multiple interesting projects at the time so we may invite you to the interview for another project if we see that your competencies and profile are well suited for it.\nYour roleAs a part of the project team you will be responsible for:\nDesigning implementing and maintaining network/security features (firewall NAT proxy intrusion prevention filtering)\nIntegrating with kernel or low-level modules (netfilter packet capture/forwarding logic)\nBuilding advanced traffic inspection and filtering logic (URL filtering protocol analysis deep packet inspection)\nTroubleshooting complex network failures (asymmetrical routing NAT/firewall interactions dropped reply traffic)\nCollaborating with architects QA and other engineers on secure network systems\nReading and applying protocol & security specs (IP TCP HTTP SSL/TLS)\nEnsuring performance security and robustness in production environments\nDo we have a matchAs a Software Engineer you must meet the following criteria:\nStrong programming skills with approximately 50% in C/C and 50% in Python\nSolid foundation in computer networks: IP TCP/UDP routing NAT proxy patterns\nDeep understanding of firewall/security systems: packet filtering stateful firewalls URL filtering IPS/IDS\nExperience debugging tricky traffic flows (traffic goes forward but reply doesnt return)\nAbility to implement or consume proxy inspection HTTP/HTTPS parsing\nExperience with kernel-level or system-level network hooks/modules (Linux netfilter packet sockets)\nGood command of English (B2 level or higher)\nBeyond the criteria above we would appreciate the nice-to-haves:\nExperience with firewall vendor software (iptables nftables Palo Alto Fortinet Cisco ASA)\nFamiliarity with SSL/TLS termination and proxy SSL inspection\nKnowledge of IDS/IPS systems (Snort Suricata)\nExperience in high-performance networking systems\nFamiliarity with container/virtualization networking\nExposure to distributed or scalable systems\nMore reasons to join usFlexible working hours and approach to work: fully remotely in the office or hybrid\nProfessional growth supported by internal training sessions and a training budget\nSolid onboarding with a hands-on approach to give you an easy start\nA great atmosphere among professionals who are passionate about their work","description_format":"text","description_chars":3404,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":["Flexible schedule"],"hiring_locations":[{"name":"Egypt","iso":"EG","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["IT Outsourcing & Dedicated Teams","Custom Software 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