Senior Security Engineer (m/f/d)

Senior Security Engineer (m/f/d)

Your mission

Do you want to do more than just write security concepts - and put your decisions into practice directly? Do you see cloud security not as a compliance checklist, but as the combination of threat modeling, Infrastructure as Code, and genuine hands-on engineering? Then we are looking for you to join our CISO team as a Senior Security Engineer (m/f/d) in a hybrid working model in Sofia, Bulgaria.

You will join a three-person team where responsibility is genuinely shared: no ticket queues and no “that’s not my area.” We plan together, cover for one another, and usually implement and operate the security controls we design ourselves. This means you will see the impact of your work immediately - not at some point in the distant future.

Your Responsibilities

• Security Architecture & Cloud Guardrails: You will take technical ownership of the security architecture and controls across our Azure environment - from Defender for Cloud and Microsoft Sentinel to Log Analytics. You will build and maintain the corresponding guardrails directly in Terraform.

• Detection Engineering: You will develop and continuously improve our detections in close collaboration with our Security Analyst, who is responsible for day-to-day SIEM monitoring and triage. You will work as a well-coordinated team rather than in separate silos.

• Vulnerability Management: You will further develop our vulnerability management and monitoring across a hybrid environment. This includes our growing cloud landscape as well as the existing on-premises stack for as long as the migration is ongoing.

• Security Beyond the Cloud: You will contribute your expertise beyond cloud security, including identity, endpoint security, application security, incident response, and AI. Using your security engineering skills, you will, for example, develop tooling for AI-assisted penetration testing within our team and translate it into practical, scalable processes.

• AI-Assisted Engineering: You will use tools such as Claude Code to build and maintain internal security tools and automations. At the same time, you will help us identify AI-specific risks early-from the secure use of AI coding assistants to prompt injection.

Your skillset

• Azure Security & Certifications: You have at least five years of experience in security engineering and several years of hands-on experience implementing Azure security. You hold an AZ-500 certification or have equivalent practical expertise. SC-100, CISSP, CCSP, or Security+ certifications are a plus.

• Infrastructure & Automation: You can confidently read, write, and further develop security-related Terraform code. Experience with Python, Django, PowerShell, or AI-assisted development is a plus.

• Identity & Detection: You have practical experience with Entra ID, RBAC, and PIM, as well as solid knowledge of network security, SIEM, and detection engineering.

• Offensive Security & Vulnerability Management: Ideally, you have experience with traditional or AI-assisted penetration testing and with tools such as Tenable or Microsoft Defender Vulnerability Management.

• Hands-On Mindset: You do not just design security controls -you implement and operate them in practice. When you identify a problem, you do not wait for a ticket; you take ownership and develop a solution.

• Collaboration & Communication: You share knowledge and responsibility and work closely with the team on areas of joint ownership. You communicate confidently and professionally in English. German is a plus, but not a requirement.

Experience with an ongoing cloud migration and AI/LLM security is welcome, but not essential. What matters to us is what you can genuinely do - substance beats buzzword bingo.

Dein Winning Deal

• Deine Benefits: Neben 25 Tagen Urlaub bieten wir dir außerdem Voucher für Essen, subventionieren deine "Multisport Card", untestützen dich durch medizinische und zahnärztliche Versorgung, sowie grandiose Team- und Companyevents.

• Dein Arbeitsplatz: Bei uns arbeitest du im flexiblen, hybriden Modell und hast zudem die Möglichkeit auf 2 Wochen im Jahr “Workation” innerhalb der EU (*gilt nur für Mitarbeiter:innen mit EU-Pass)

• Dein Footprint: Eine Position in einer profitablen Company, in der du die Freiheit und das Vertrauen erhältst, diese mitzugestalten und mit uns gemeinsam an der “future of work” zu arbeiten. Du sicherst den Einsatz moderner AI-Technologien in einem Unternehmen, das AI nicht nur im Produkt, sondern auch in der eigenen Security-Automatisierung nutzt. Was du baust, wirkt direkt, nicht irgendwann.

• Die Werte: Wir punkten mit einer offenen, authentischen Kultur und einem leistungsstarken sowie humorvollen Team, das sich schon jetzt darauf freut, mit dir mutige Entscheidungen zu treffen und neue Wege zu gehen, die uns zu nachhaltigen Erfolgen führen. Bei uns wird Verantwortung wirklich geteilt. Du arbeitest in einem kleinen Team mit kurzen Wegen, ehrlichem Austausch und Kolleg:innen, die füreinander einspringen.

• Deine Chance: Wir stehen am Anfang unserer Azure-Cloud-Migration. Du kommst also nicht in ein fertig gebautes Setup, das du nur verwaltest, sondern kannst unsere Security-Architektur, Guardrails und Prozesse von Anfang an mitgestalten. Dabei bekommst du den Raum, neue Ansätze auszuprobieren, technisch umzusetzen und gemeinsam mit uns weiterzuentwickeln.

About us

Are you looking for a profitable scale-up that offers you long-term prospects and a disruptive business model with a growth-oriented corporate culture? Do you also want to grow beyond the usual standards, bring your own initiative and appreciate actively shaping topics?

Then yoummday is the right place for you!

yoummday: “ You made my day ” - As an innovative SaaS platform, we connect companies with highly qualified freelance call center agents (“Talents”) worldwide. Our digital solution enables flexible, scalable and efficient customer support - without the need for traditional call center structures. We are a family-run Munich-based scale-up with over 350 employees (“Daymakers”) at 5 locations in Europe and 1 in the USA - further growth is inevitable ;).

Become part of our team and set new standards in AI-supported customer service with us to create smart, data-driven solutions that inspire.

At yoummday, we value diversity and equal opportunities. We welcome applications regardless of gender, background, age, sexual orientation, religion, or disability. Different perspectives make us stronger - which is why we actively promote an inclusive work environment where everyone can reach their full potential.