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 backend systems to detect and prevent web service abuse, automated bot traffic, and malicious activity across Surfshark services. - Build, deploy, and maintain robust Layer 7 rule engines, rate-limiting systems, and edge-layer defenses (WAF/CDN) to mitigate large-scale application attacks. - Drive architectural decisions for backend services and data pipelines that integrate real-time web telemetry for automated threat mitigation. - Collaborate with cross-functional security and platform teams to model emerging application threat vectors and engineer scalable defenses. - Ensure the long-term reliability, low latency, security, and cost efficiency of the backend infrastructure supporting anti-abuse efforts. AND YOU CAN CHECK OFF: - Experience in Python, including building and optimizing scalable microservices and data processing frameworks; - Proven capability to take end-to-end ownership of complex systems, driving features from initial concept and design diagrams through to deployment and maintenance; - Hands-on experience with cloud platforms (AWS/GCP), containerization (Docker/Kubernetes), and web protocols (HTTP/HTTPS, REST) for troubleshooting application-level security issues; - Experience designing data collection pipelines and working efficiently with large database systems 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 knowledge about OWASP Web/API risks, bot prevention techniques, credential stuffing countermeasures; - Have experience with other backend languages used in our stack (e.g., Rust) and the architectural wisdom 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.