The Senior Software Security Engineer will be responsible for analysing software designs and implementations from a security perspective, identifying and proposing remediations to security issues throughout the software development lifecycle (SDLC).Experience and Education 5+ years of experience in Security Engineering with a focus on product security and/or application security. Bachelor’s degree in Computer Science, Information Security, or a related technical field. Good verbal and written English communication. Technical Skills In-depth knowledge of Linux and Docker container-based infrastructures, including their orchestration (e.g. Kubernetes). Working knowledge of techniques, standards, and state-of-the-art authentication and authorization technologies, applied cryptography, security vulnerabilities and remediations. Significant software development experience. Experience in Go (our main backend language), Typescript/Javascript, C/C++, Python and Bash is desirable. Working knowledge of web-related protocols and technologies (HTTP, REST APIs, DOM, CSP), networking protocols (IP, TCP, UDP), and security protocols (TLS). Experience in performing threat modeling, with a good grasp of common threat vectors and frameworks. Strong knowledge of security principles, best practices, and industry standards, such as NIST, ISO 27001, and CIS Critical Security Controls, OWASP ASVS and Testing Guides. Familiarity with industry-standard security frameworks such as OWASP and NIST. Experience with security tools such as SAST, DAST, IAST, and SCA. Exceptional analytical and investigative skills, with hands-on experience in root cause analysis. Knowledge of current and emerging threats and techniques for exploiting security vulnerabilities. Experience with CI/CD pipeline, security tools integration, and secure SDLC. Experience with cloud-based infrastructure (AWS, Azure, or Google Cloud), and on best practices on how to secure cloud environments. Desirable QualificationsAdvanced Expertise Familiarity with security considerations for AI/ML systems is desirable. Understanding of distributed systems design, implementation and operation. Understanding of privacy threats and controls, including on how to adapt generic best practices to specific scenarios in the product by providing detailed specifications to stakeholders. Exploit development experience, and good understanding of the necessary conditions to trigger different vulnerability types, and the maximum impact achievable. Experience with enterprise log collection and analysis platforms (e.g., Splunk, OSQuery). Education and Certifications Master's degree or equivalent experience preferred. Security certifications are a plus, including OSCP, OSEE, SANS/GIAC, CCSP, and CISSP. Soft Skills and Leadership Excellent verbal and written communication, with the ability to translate complex security concepts to technical and non-technical stakeholders. Demonstrated ability to design, document, and implement new security processes. Experience in a high-growth technology environment or SaaS business. Ability to remain calm under pressure, especially during incidents or audits. In return for your expertise, we’ll support you in this new challenge with coaching & development every step of the way. Also, to reward the hard work, you’ll get: Contract of Employment (UoP) Private medical coverage, Multisport Life insurance (two annual incomes),  Employee Stock Purchase Plan – 15% discount for buying Motorola’s Stock units,  Employee Pension Plan – 3,5 % of the month’s salary gross, which goes to the retirement account IP Tax Relief (up to 50%) Yearly salary increase (depends on individual performance) Yearly bonus (depends on company performance) UK working hours (working day between 10-18),  8 hours working day (30 minutes lunch break included). Hybrid/ remote work: This role is primarily hybrid, with occasional travel to our Krakow office.