IT Security Officer

Callstack.io

Wrocław

On-site

PLN 223,000 - 335,000

Full time

14 days+

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Benefits offered by this job

Fully covered life insurance

Private healthcare for you and family

Mental health platform access

Multisport Card or sports allowance

Wellbeing & Development Budget

Monthly lunch allowance

Cool office in Wrocław city center

Team events and activities

Company-wide workations and team-build

Top-notch Apple hardware

Job summary

Callstack.io in Wrocław, Poland, is seeking an IT Security Officer to own day-to-day security and infrastructure operations. You will safeguard systems, devices, identities and data while enabling employees and refining security processes.

This role blends hands-on cybersecurity, IT infrastructure, incident response, audits, and compliance work with cross-functional collaboration across teams and vendors.

Qualifications

Experience in IT Security, Cybersecurity, IT Infrastructure, or a similar role
Good knowledge of macOS, Windows, and Linux
Hands-on experience with endpoint security, MDM, IAM, MFA, SSO, and access management
Practical knowledge of network security, VPNs, firewalls, and DNS
Experience with security monitoring, vulnerability management, and incident response
Understanding of cloud security and AWS, Azure, or GCP
Familiarity with ISO 27001, GDPR, ISMS, and risk management
Knowledge of SPF, DKIM, and DMARC is a plus
Strong analytical, problem-solving, and communication skills
Good English and a proactive, ownership-driven mindset

Responsibilities

Manage and continuously improve IT security policies, procedures, and controls.
Maintain and develop security tools, including SentinelOne EDR/XDR, SIEM, and Kandji MDM.
Monitor security alerts, investigate threats, and coordinate incident response and remediation.
Manage vulnerability management, endpoint security, access controls, MFA, VPN, and network security.
Oversee backups, disaster recovery, and data protection.
Support cloud and email security, including SPF, DKIM, and DMARC.
Coordinate security audits, penetration tests, risk assessments, and ISO 27001/GDPR compliance.
Maintain ISMS documentation, security KPIs, and compliance records.
Support vendor security assessments and customer security questionnaires.
Promote security awareness and continuously identify opportunities to improve and automate security processes.

Job description

Salary: 20 000 - 30 000 PLN net + VAT (B2B)

Callstack supports and inspires top industry leaders in shipping better digital products and services to their users. We are a team of high-level experts in cross-platform development and consultancy. We co-create the technology, collaborate with the Meta team on setting the direction for the future growth of the React Native framework, and much more!

We are recognized in the React Native Community as contributors to Open Source projects, organizers of React Universe Conf, as well as speakers at international conferences. We also organize regular community meetups in our HQ in Wrocław, Poland.

We truly believe that you can get the best out of people when you give them a chance to participate and develop. At Callstack you are the one to decide in which area you want to grow, you'll have an individual self-development budget to empower your competencies and gain new skills.
Our goal is to give every employee the opportunity to speak up and introduce their ideas to build the future together.

Join us and work with the TOP Silicon Valley and Fortune 500 companies in the USA!

We are looking for an IT Security Officer who will take ownership of our day-to-day IT security and infrastructure operations. You'll be responsible for keeping our systems, devices, identities, and data secure, while also supporting employees and continuously improving our security processes.

This role combines hands-on cybersecurity, IT infrastructure, endpoint management, incident response, compliance, and security awareness. You'll work closely with employees across the company, internal teams, external security specialists, auditors, and technology vendors.

As an IT Security Officer you will:

Manage and continuously improve IT security policies, procedures, and controls.
Maintain and develop security tools, including SentinelOne EDR/XDR, SIEM, and Kandji MDM.
Monitor security alerts, investigate threats, and coordinate incident response and remediation.
Manage vulnerability management, endpoint security, access controls, MFA, VPN, and network security.
Oversee backups, disaster recovery, and data protection.
Support cloud and email security, including SPF, DKIM, and DMARC.
Coordinate security audits, penetration tests, risk assessments, and ISO 27001/GDPR compliance.
Maintain ISMS documentation, security KPIs, and compliance records.
Support vendor security assessments and customer security questionnaires.
Promote security awareness and continuously identify opportunities to improve and automate security processes.

You are the right candidate if you have:

Experience in IT Security, Cybersecurity, IT Infrastructure, or a similar role.
Good knowledge of macOS, Windows, and Linux.
Hands-on experience with endpoint security, MDM, IAM, MFA, SSO, and access management.
Practical knowledge of network security, VPNs, firewalls, and DNS.
Experience with security monitoring, vulnerability management, and incident response.
Understanding of cloud security and AWS, Azure, or GCP.
Familiarity with ISO 27001, GDPR, ISMS, and risk management.
Knowledge of SPF, DKIM, and DMARC is a plus.
Strong analytical, problem-solving, and communication skills.
Good English and a proactive, ownership-driven mindset.