Senior Back-end Engineer - C#/DevOps (Cycode)

Cycode is the leading Application Security Posture Management (ASPM) providing Peace of Mind to its customers. Its complete ASPM platform scales and standardizes developer security without slowing down the business — delivering safe code, faster. The complete ASPM platform can replace existing application security testing tools or integrate with them while providing cyber resiliency through unmatched visibility, risk driven prioritization and just-in-time remediation of code vulnerabilities at scale. Cycode’s Risk Intelligence Graph (RIG), the ‘brain’ behind the platform, provides traceability across the entire SDLC through natural language. Backed by tier-one investors Insight Partners and YL Ventures, the series-B company has raised $80 million and boasts a number of the top global Fortune 100 customers in the world that are gaining immediate value.

This is an incredible opportunity to immerse yourself in the exciting world of cybersecurity and break new ground in source code security, the future of the industry. You’ll work alongside a dynamic team of experts on a passionate mission to make an impact as well as an incredible network of legendary cybersecurity luminaries and leaders.

We’re looking for a skilled Back-End Engineer to join our Scanners Infrastructure Team, where C# engineering meets cloud-native DevOps. Your mission will be to ensure our services are resilient, performant, and - above all - scale efficiently. You’ll take ownership of the monitoring, scaling, and optimization of our .NET Core microservices hosted on Kubernetes (using Keda as an autoscaler).

This is a hybrid role where backend development and infrastructure reliability go hand-in-hand. You will play a vital role in identifying performance bottlenecks, proactively resolving production issues, and continuously improving service health and scalability. You'll work closely with teammates to detect scanner performance issues, build out robust alerting, and implement long-term improvements.

• Own the end-to-end development and performance of backend C# services.
• Design, implement, and maintain autoscaling strategies on Kubernetes.
• Monitor and optimize the health of production systems; build and maintain robust alerting around scanner performance.
• Collaborate with the team to identify infrastructure and performance gaps and deliver scalable solutions.
• Participate in architectural and technological decisions to support a rapidly growing platform.

• 4+ years of hands-on experience with .NET Core / C# in production environments.
• Solid experience working with microservices architecture.
• Strong understanding of Kubernetes and container orchestration, ideally with KEDA.
• Experience with monitoring and alerting tools, and a strong focus on production reliability (Grafana).
• Familiarity with databases (MongoDB, PostgreSQL, GraphDBs) and messaging systems (Kafka).
• Experience with Docker, CI/CD, and infrastructure as code tools like Terraform.
• Passion for building scalable, observable, and resilient backend systems.

• Work in a highly professional team with a friendly community spirit and supportive environment.
• Ability to work from our comfortable office in Warsaw at Prosta str. 51.
• Paid vacation — 20 business days per year, 100% sick leave payment.
• Flexible working hours – we care about you (!) and your output.
• 5 sick days per year.
• Equipment provision.
• Health insurance in Luxmed (after the end of the probationary period).
• Partially compensated educational costs (for courses, certifications, professional events, etc.).
• Legal and Accounting support in Poland.
• English and Polish classes 2 times a week (online).

• Bright and memorable corporate life: corporate parties, gifts to employees in honor of live events, weekly pizza Fridays.