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.