Senior Full Stack Developer (Cyber Security)

Decanos is a leading provider in the field of Managed Security Service Providers (MSSP) and offers a comprehensive platform for advanced cybersecurity solutions. Our software is specifically designed to proactively identify IT security risks , analyze threats, and automate the implementation of security measures. Our MSSP software includes powerful modules such as Extended Detection & Response (XDR), Security Information and Event Management (SIEM), a 24/7 operational Security Operations Center (SOC) , as well as specialized solutions for Threat Intelligence, Incident Response, and Behavioral Security Training. Leveraging artificial intelligence, automated playbooks, and real-time data analysis , Decanos helps companies detect security incidents early and respond effectively.

Through close collaboration with Cyber Curriculum GmbH , we ensure that our solutions comply with the latest regulatory requirements, such as NIS2 and KRITIS . We offer tailored security services to companies in critical infrastructure, the financial sector, federal authorities, and the defense industry, strengthening their cyber resilience in the long term.

Decanos stands for an integrated, intelligent, and forward-thinking security strategy that helps companies effectively defend against cyberattacks and build a secure digital future.

Tasks

We are looking for a Senior Full-Stack Developer (Cybersecurity) who will play a key role in building our MSSP platform while mentoring and leading junior developers . This is a hands-on engineering role where you’ll develop critical security features, optimize large-scale real-time data processing, and integrate cutting-edge cybersecurity tools ( CrowdStrike, Elastic, Windows Defender ). You’ll also help shape best practices, guide architectural decisions, and foster a strong development culture within the team.

Key responsibilities:

• Develop & optimize full-stack applications using Supabase (SQL), NextJS, TypeScript, and Python .
• Build scalable and secure APIs to interact with security tools and external integrations.
• Lead & mentor junior developers , conducting code reviews, technical coaching, and architectural guidance.
• Ensure best practices in secure coding, performance optimization, and database design .
• Process and analyze security data , working with SIEMs, EDRs, and real-time event processing.
• Work closely with security analysts to translate threat intelligence into automated detection and response features.
• Own and drive system architecture decisions , ensuring scalability and maintainability.
• Foster a collaborative team environment , helping junior developers grow their expertise.

Requirements

Required skills & experience:

✅ 5+ years of experience in full-stack development , ideally in cybersecurity or security-related applications .

✅ Proven experience leading and mentoring junior developers in a team setting.

✅ Expertise in TypeScript, NextJS, Python, and Supabase (SQL) .

✅ Strong experience with API development (REST, GraphQL), authentication (OAuth, JWT), and security best practices .

✅ Familiarity with SIEMs, EDR solutions, security automation, and large-scale security data processing .

✅ Experience working with large-scale databases, query optimization, and performance tuning .

✅ Hands-on experience integrating with security tools like CrowdStrike, Elastic, or Windows Defender .

✅ Knowledge of cloud platforms (AWS, GCP, or Azure) and DevOps workflows (CI/CD, Infrastructure as Code).

Nice to have:

🔹 Experience with security automation & orchestration (SOAR) .

🔹 Contributions to open-source security projects .

🔹 Security certifications ( OSCP, CISSP, AWS Security ).

Benefits

🚀 Lead a growing development team in building an innovative MSSP platform.

🏢 Hybrid setup: 3 days in a modern Berlin office , 2 days remote.

💡 High-impact role shaping both the platform’s technical direction and the team’s growth.

📚 Training budget for cybersecurity certifications and conferences.

✅ Option for a company pension

⛑️ A private supplementary health insurance

🚲 Option for a company bike

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