Senior Backend Software Engineer(Python)

Are you passionate about cybersecurity and ready to join a fast-growing company? Look no further—Surfshark is the place for you! At Surfshark, you'll work with a suite of cybersecurity products, reaching a global audience. Whether you're developing new features, researching the latest threats, filming videos, or making cybersecurity topics interesting for all, you'll be a crucial part of our mission to humanize digital security and make it accessible to everyone. Ready to make a difference in the cybersecurity world? Apply now to join the Surfshark team! IF YOU WANT TO: - Design, architect, and implement high-performance systems to detect and prevent service abuse, automated threats, and malicious activities across Surfshark services; - Collaborate with cross-functional teams to identify risks, model emerging threat vectors, and engineer scalable defenses; - Build, deploy, and maintain robust rule-based systems and edge-layer defenses to mitigate large-scale attacks; - Drive architectural decisions for backend services and data pipelines that integrate diverse telemetry sources for real-time threat detection; - Ensure the long-term reliability, scalability, security, and cost efficiency of the infrastructure supporting anti-abuse efforts. AND YOU CAN CHECK OFF: - Strong proficiency in Python, including experience building and optimizing scalable microservices and data processing frameworks; - Proven ability to take end-to-end ownership of complex systems, driving features from initial concept and design through deployment and maintenance; - Experience with cloud platforms (e.g., AWS, GCP), containerization (Docker/Kubernetes), and core networking protocols (TCP/IP, DNS, HTTPS) for debugging complex connectivity and security issues; - Experience designing data collection pipelines and working efficiently with large-scale databases and data processing tools; - A strong commitment to engineering excellence: writing clean, well-tested code, managing technical debt, and mentoring others through rigorous code reviews; - An analytical, threat-hunting mindset with the ability to research evolving attack vectors and proactively propose systemic improvements. BONUS POINTS IF YOU: - Have experience with API security, bot prevention techniques, credential stuffing countermeasures, and DDoS mitigation strategies; - Are familiar with other backend languages used in our stack (e.g., Rust) and have the architectural judgment to know when to use them. HERE’S THE DEAL: - Growth and learning opportunities: time dedicated to learning, conferences, online learning platforms, and books for your professional development; - Health and wellness: we want you to feel and be your best. That's why we offer various benefits, from online workouts and a physical coach to health insurance and regular mental health checks; - Tools of your choice: choose the technical equipment and tools you need to do your best work; - Community and celebrations: get ready for long-lasting traditions such as yearly workation, Friday get-togethers, various team buildings and company celebrations; - Work-life balance: as a general rule, we work based on a 3+2 hybrid model. And let’s not forget the WFA policy – an opportunity to work from anywhere in the world; - More days off: additional vacation days depending on your tenure; - Premium Surfshark accounts: for you, your family, and friends; - Gross salary: 4400-7000 Eur/month. Although it may vary depending on your skills and experience.