Summary: Seeking a versatile Senior Backend Engineer with strong C++ expertise to build and operate cloud-based telecom systems, focusing on DOCSIS protocols and real-world production troubleshooting. Highlights: 1. Develop and debug complex cloud-based telecom systems with modern C++ and Java. 2. Focus on telecommunications protocols (DOCSIS) and production troubleshooting. 3. Leverage AI tools (LLMs, Copilot) to accelerate development and debugging. We are looking for a highly versatile **Senior Backend Engineer** with strong C\+\+ expertise to join a small, high\-impact engineering team building and operating cloud\-based telecom systems. This role is ideal for someone who enjoys working close to the system: debugging complex production issues, analyzing network behavior, improving performance, and developing new backend features. Comfortable operating in dynamic environments with evolving requirements, frequent context switching, and tight feedback loops across engineering, QA, and operations. You will work across C\+\+, Java and cloud services, with a strong focus on **telecommunications protocols (especially DOCSIS)** and real\-world production troubleshooting. We are particularly interested in engineers who actively use **AI tools (LLMs, Copilot, etc.)** as part of their daily development workflow. **What You’ll Do** * Design, develop, and maintain backend components in modern C\+\+ * Debug complex production issues across application and network layers * Analyze telecom/network behavior (DOCSIS environments) * Optimize performance and concurrency * Work across C\+\+, Java, and AWS cloud services * Improve system reliability, performance, and observability * Collaborate closely with QA and frontend teams * Leverage AI tools (Copilot, ChatGPT, Cursor) to accelerate development and debugging **What We’re Looking For** * Strong modern C\+\+ (C\+\+11/14/17\) * Multithreading, memory management, and performance optimization * Deep debugging skills in Linux production environments * Network troubleshooting and packet capture analysis (Wireshark, tcpdump) * AWS, microservices, CI/CD, Docker, Terraform * Telecom experience (DOCSIS strongly preferred) **AI\-Native Mindset** * We value engineers who actively use AI tools in their daily workflow, understand their limitations, and combine AI assistance with strong engineering judgment. **Benefits:** * Flexible working hours * Your vacation is over and you feel that it was not enough? XL Days: unlimited responsible time off. * Stay up to date with the latest technology! We offer free subscription to training platforms such as Coursera, Udemy, and others * Power your language skills with our free English classes. * AWS Select Technology Partners: access to partner\-only online training, funnels, webcasts, and other valuable assets. * You want to keep learning? Virtual training through our internal platforms! * Extended paternity leave and a progressive return on maternity leave. * Baby shower gifts * Five and ten\-year anniversary special surprise present. We cannot spoil it! * Referral Program: win a gift card when you refer amazing people like you! * If that’s not enough and you still want to keep learning – we offer Tech talks and webinars! We provide a collaborative environment. We will challenge you to actively propose new ideas and implement cutting\-edge technologies. As we are a fast\-growing company, you will have the opportunity to develop your professional career according to your interests. If you want to make your next career move, apply now. We are waiting for you!