IT Security Officer

Salary: 20 000 - 30 000 PLN net + VAT (B2B) Callstack is a cross-platform and AI-native technology company working with some of the world’s leading brands to build better digital products and services. We’re known for pushing the React Native ecosystem forward - from co-founding the React Foundation and contributing to Open Source to organizing React Universe Conf, Agent Conf, and community events around the world. But Callstack is built by more than great engineers. Behind our technology is a team of people shaping how we grow, work with clients, build our brand, and create new opportunities. We give people the space to take ownership, bring ideas to the table, and make a real impact on how the company evolves. As Callstack grows into new technologies, markets, and ways of working, you’ll have the opportunity to grow with it. Join us and take the next step with Callstack! 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.