{"id":2255593,"url":"https://alion.io/job/primer-senior-it-systems-administrator-infrastructure-engineer","title":"Senior IT Systems Administrator / Infrastructure Engineer","company":{"id":2457743,"name":"Primer","domain":"primer.gr","url":"https://alion.io/company/primer-gr","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":null,"truth_index":null},"role":"DevOps","role_family":"DevOps","seniority":"senior","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Chalandri, Greece","Athens, Greece"],"countries":["GR"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":1500,"max":2500,"currency":"EUR","period":"month","gross":false,"usd_annual":33624},"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Active Directory","optional":false},{"name":"Amazon EC2","optional":false},{"name":"AWS","optional":false},{"name":"Bash","optional":false},{"name":"Cloudflare","optional":false},{"name":"DHCP","optional":false},{"name":"DNS","optional":false},{"name":"Docker","optional":false},{"name":"Git","optional":false},{"name":"Grafana","optional":false},{"name":"Linux","optional":false},{"name":"MySQL","optional":false},{"name":"Nginx","optional":false},{"name":"OPNsense","optional":false},{"name":"Prometheus","optional":false},{"name":"Proxmox VE","optional":false},{"name":"Python","optional":false},{"name":"Uptime Kuma","optional":false},{"name":"VPN","optional":false},{"name":"Windows Server","optional":false}],"status":"live","first_seen_at":"2026-10-08T00:00:00Z","employer_posted_date":null,"last_verified_at":"2026-10-08T00:00:00Z","board_verified":false,"closed_at":null,"days_open":21,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":21},"description":"Ποιοι είμαστε\nΣτην Primer Software (www.primer.gr) αναπτύσσουμε καινοτόμες τεχνολογικές λύσεις. Για να συνεχίσουμε να προσφέρουμε κορυφαίες υπηρεσίες, αναζητούμε έναν/μία έμπειρο/η Senior IT Systems Administrator / Infrastructure Engineer. Ο κατάλληλος υποψήφιος θα αναλάβει τη διαχείριση, υποστήριξη και στρατηγική βελτιστοποίηση της συνολικής πληροφοριακής και δικτυακής μας υποδομής, διασφαλίζοντας την υψηλή διαθεσιμότητα και ασφάλεια των συστημάτων μας.\nΚύριες Αρμοδιότητες\nΩς Senior Infrastructure Engineer, θα είστε υπεύθυνος/η για:\nVirtualization & Servers: Τη διαχείριση, συντήρηση και παρακολούθηση του serverinfrastructure σε περιβάλλον ProxmoxVE, καθώς και το administration των Linuxservers της εταιρείας.\nΔίκτυα & Ασφάλεια: Τη διαχείριση firewall και δικτυακών πολιτικών μέσω OPNsense, καθώς και την παραμετροποίηση MikroTikrouters και βασικών δικτυακών υπηρεσιών.\nWeb, Mail & VoIP: Την υποστήριξη και παραμετροποίηση NGINXwebservers, custommailserver υποδομών και του τηλεφωνικού κέντρου PBX / Asterisk.\nHardware & IT Support: Την τεχνική υποστήριξη του συνόλου των εργαζομένων σε θέματα PChardware, διάγνωσης βλαβών, δικτύου, email και καθημερινών τεχνικών ζητημάτων.\nΑναβάθμιση Υποδομών: Την παρακολούθηση της καλής λειτουργίας των συστημάτων, τη λήψη προληπτικών μέτρων (incidentsmanagement) και τη συμμετοχή σε έργα αναβάθμισης και cybersecurityhardening.\nΑπαραίτητα Προσόντα:\nΣπουδές: Πτυχίο Πληροφορικής, Μηχανικού Υπολογιστών/Δικτύων ή συναφούς αντικειμένου (ή ισοδύναμη αποδεδειγμένη επαγγελματική εμπειρία).\nVirtualization: Εμπειρία σε Proxmox VE / virtualization infrastructure (VMs, containers, zfs/ceph storage, backups, high availability).\nLinux Administration: Άριστη γνώση διαχείρισης υπηρεσιών, χρηστών, δικαιωμάτων, logs, system monitoring και troubleshooting.\nPCHardware: Διάγνωση τεχνικών προβλημάτων και αντικατάσταση εξαρτημάτων.\nΠροσωπικές Δεξιότητες: Οργανωτικότητα, υπευθυνότητα, ικανότητα γρήγορης επίλυσης κρίσιμων προβλημάτων (incidents) και εξαιρετικό πνεύμα συνεργασίας.\n\nΕπιθυμητά Προσόντα (Θα θεωρηθούν επιπλέον πλεονέκτημα)\n\nΚαλή γνώση AWS (EC2, security groups, snapshots, storage).\nCloudflare: Διαχείριση DNS records, proxy settings, SSL/TLS, firewall/caching rules και web traffic troubleshooting.\nMail Servers & VoIP: Εμπειρία σε custom mail servers (Postfix, Dovecot, SMTP/IMAP, SPF, DKIM, DMARC) και PBX / Asterisk (extensions, trunks, IVR, VoIP).\nNGINX Web Server: Εμπειρία σε reverse proxy configuration, SSL certificates, virtual hosts και performance tuning.\nFirewalls & Routing: Εμπειρία σε OPNsense (rules, NAT, VPN, VLANs) και MikroTik routers (routing, DHCP, DNS).\nΕξοικείωση με Docker (containers, images, volumes, networks).\nΓνώση Windows Server & Active Directory (DNS, DHCP, users/groups).\nΔιαχείριση και Replication βάσεων δεδομένων MySQL και MongoDB (High Availability, failover, backup/restore).\nΕμπειρία σε εργαλεία Monitoring (Mmonit, Grafana, Prometheus, Uptime Kuma).\nΓνώση Cybersecurity & Hardening σε Linux servers και firewalls.\nΕμπειρία στο scripting (Bash / Python) για αυτοματοποίηση εργασιών και χρήση Git.\nΚαλή γνώση της Αγγλικής γλώσσας (τεχνική τεκμηρίωση).\nΠαροχές:\nΤι Προσφέρουμε\nΑνταγωνιστικό πακέτο αποδοχών (€1.500 – €2.500 μικτά, αναλόγως εμπειρίας).\nΣύγχρονο, δυναμικό και οργανωμένο περιβάλλον εργασίας.\nΕυκαιρίες συνεχούς εκπαίδευσης και εξέλιξης σε τεχνολογίες αιχμής.\nΣυμμετοχή σε μεγάλης κλίμακας και ενδιαφέροντα techprojects.\nΥποβολή Αιτήσεων\nΌλες οι αιτήσεις διαχειρίζονται με απόλυτη εχεμύθεια.","description_format":"text","description_chars":3492,"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":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Artificial Intelligence","Military","Ammunition"],"lifecycle":[{"event":"open","at":"2026-10-11T03:28:10Z"}],"visa":[],"liveness":{"score":50,"band":"ok","label":"Likely open","p_open":0.85,"p_active":0.789,"p_room":0.75,"age_days":21,"expected_fill_days":28,"reasons":["seen:21","win:late"],"computed_at":"2026-10-29T05:49:05Z"},"pay":{"stated_usd_annual":33624,"is_top_pay":false},"html_url":"https://alion.io/job/primer-senior-it-systems-administrator-infrastructure-engineer","json_url":"https://alion.io/job/primer-senior-it-systems-administrator-infrastructure-engineer.json","meta":{"generated_at":"2026-10-29T15:23:53Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per 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