At LINK, we connect businesses to customers through our communications products and services that drive engagement and satisfaction during each stage of the customer journey.
You're probably already familiar with us: we're behind the messages you receive via SMS, WhatsApp, email, or even to check-in for your upcoming flight, receive delivery notifications, cash in a mobile coupon to your favorite store, and so much more.
You will be joining a security team as the engineer and an equal technical partner. Our environment is a complex hybrid infrastructure combining bare-metal systems and multiple cloud platforms. We are looking for a hands-on engineer who sees technology as a tool to solve real security and operational problems.
This role requires a high level of independence and ownership. You should be comfortable planning and prioritizing your own work, investigating problems without detailed instructions, and taking technical topics from analysis through implementation and documentation.
You will help us build and mature our SOC capabilities, improve threat detection, investigate security incidents, develop automation, and maintain the security monitoring platform.
Key Responsibilities
Maintaining and tuning the Wazuh HA cluster: Making sure the system doesn't choke. This includes OpenSearch performance optimization, data retention management, tuning queues on managers and workers, and optimizing I/O load and disk space
Working with raw logs: Creating custom decoders and local rules for specific services and edge cases that standard rules can't handle. Fighting false-positives at the detection logic level
SOAR Engineering (Automation): Building integrations and automation around APIs to remove manual workload from the future SOC team
K8s Security: Integrating container environments with the central logging system
Incident Response Processes: Creating pragmatic, technical security procedures and incident response playbooks
System hardening: Working closely with IT and DevOps teams to secure operating systems and services
Your Tech Stack
SIEM/XDR: Wazuh HA
Infrastructure: Complex hybrid environment (Bare-metal, AWS, Azure, GCP)
OS: Linux (various distributions)
Data / Logs: OpenSearch / Elasticsearch, auditd, syslog, custom decoders, local_rules
Containerization: Kubernetes
Automation & IaaC: Bash, API, Ansible, Python
Must-have Requirements
Advanced knowledge of Polish is an absolute must-have;
Wazuh (SIEM/XDR): Commercial experience with the system in a large enterprise environment. You need to understand how agents, decoders, and rules work under the hood
Deep Linux Adminstration: Fluent administration and troubleshooting. We are looking for someone who can diagnose issues at the OS level
OpenSearch / Elasticsearch: Proficiency in cluster management (ISM configuration, index lifecycle, troubleshooting queries and database performance)
Scripting & Automation: Fluent scripting and working with REST APIs – you must know how to "glue" different systems together
Understanding Log Sources: Good knowledge of systems like auditd and syslog
English: B2+ level (to comfortably work with technical documentation and communicate with international IT teams)
Nice-to-have
Experience in designing and deploying Wazuh HA clusters from scratch
Practical knowledge of Ansible for configuration management
Practical knowledge of Python
Operational experience in a Security Operations Center
Deeper experience with Kubernetes security
Practical experiments using LLMs to support log analysis and automation in a SOC
We Offer
Hybrid work model after trial period
Co-financed Medicover care
Co-financed private life-insurance
Co-financed MultiSport card
Extra day off on your birthday
Team building events
Extra fee from employer for retirement program (PPK)
Employee Referral Program
Summer bonus
Fruits in the office
Lunch days: Mondays & Wednesdays
Free parking (cars & bikes)
