# Senior Backend Engineer - Company: [Cyluscybersecurity]() - Location: Tel-Aviv, Israel - Team: R&D - Posted: November 18, 2025 ## Job description Cylus is a cybersecurity startup, led by world-class cyber experts. Our mission is to protect millions of people, worldwide, from cyber threats specific to modern trains, keeping them safe and on time. **About Us** Cylus, the global leader in rail cybersecurity, helps mainline and urban railway companies prevent security incidents and service disruptions caused by cyber-attacks. With about $60M in funding by top VCs and strategic investors, global customers and strong partnerships with the biggest railway integrators, we make a significant impact on the multi-billion global railway industry. We are looking for an exceptional **Senior Backend Engineer** to join our R&D team and help us get to the next level. If you have the right attitude and skills, we invite you to hop on board this bullet train. **In this role, you will:** 1. Lead the design, development, and optimization of microservices tailored for the scalable processing of high volumes of network communication data. 2. Collaborate with experienced engineers to architect distributed & scalable data processing solutions that backbone our Rail Tech Security Platform, CylusOne. 3. Collaborate with the brightest network researchers to productize our cybersecurity threat detection & network analysis features. 4. Apply advanced software engineering principles to optimize code performance, scalability, and resource utilization across microservices & algorithms. 5. Develop in Go while leveraging a cutting-edge technology stack 6. Truly have fun coming to work every day **Requirements:** 1. 6+ years of experience,  specifically in building and maintaining scalable & complex software systems. 2. Proven track record of delivering large-scale, high-quality products 3. Tech-savvy, always up-to-date with best practices and latest technology developments 4. Proven ownership: thoughtful design, realistic estimates, and consistent delivery. 5. Proven experience in using and integrating AI into daily tasks 6. Love to take on creative tasks, have end-to-end ownership, and work collaboratively to advance our mission and business goals **Advantages:** * Strong Linux and networking fundamentals (TCP/IP, sockets, latency/throughput basics). * Bachelor's degree in computer science, Electrical Engineering, or equivalent practical experience * Deep understanding of Microservices and containerized environments (Docker/Kubernetes). * Experience with Golang and c/c++ * Experience with cloud environments * Experience working in Linux environment ## Apply [Apply on Cyluscybersecurity]() Canonical job page: