Senior Backend Developer (LTE)

TL;DR

Senior Backend Developer (LTE): Designing and implementing datapath for multi-path connections with an accent on Linux, TUN/TAP, MPTCP, and UDP-overlay. Focus on configuring and developing QoS schemes, integrating prioritization and monitoring, and ensuring efficient traffic delivery and incident resolution for autonomous vehicles.

Локация: Москва

Компания

Navio is developing autonomous driving technology compatible with various types of transport, from cars to trucks.

Что делать

• Design and implement datapath for multi-path connections (Linux, TUN/TAP, MPTCP, UDP-overlay).
• Configure and develop QoS schemes, integrate prioritization and monitoring.
• Implement mechanisms for delivering necessary traffic without unnecessary retransmission.
• Ensure monitoring, tracing, and debugging: pcap, Prometheus, Grafana.
• Conduct field tests on real autonomous vehicles.
• Investigate incidents related to infrastructure failures.

Требования

• Excellent knowledge of TCP/IP, UDP network protocols.
• Experience developing high-performance network code in C/C++.
• Linux networking: policy routing, iproute2, tc, qdisc, TUN/TAP, nftables, understanding GRO/GSO/zero-copy, pinning/NUMA.
• Understanding of QoS, DSCP/ECN, traffic prioritization.
• Understanding of VPN: client and server architecture, IPSEC, WireGuard, OpenVPN protocols.

Хорошо, если есть

• Skills in profiling and optimization: perf, eBPF, flamegraphs.
• Experience with MPTCP (kernel, subflows, schedulers) and/or QUIC (streams, datagrams, partial reliability).
• Experience in mobile networks (LTE/5G), knowledge of operator QoS profiles.
• Experience with XDP/eBPF/DPDK, io_uring.

Культура и преимущества

• Work in an accredited IT company.
• Work in a team of top developers, with the opportunity to develop unique and large-scale projects.
• Competitive working conditions (white indexed salary, salary + annual bonus).
• Standard work schedule, but with a flexible approach to the start/end of the working day.
• Access to vast opportunities for development and advanced training in the Virtual School on the HR platform, as well as other forms of training.
• Opportunity to attend (as a listener or speaker) all-Russian and international conferences.
• DMS for employees from the first day (+ dentistry after the probationary period) and a preferential medical insurance program for relatives.
• Lunches for employees, free coffee and other drinks in the cafeteria.
• Salary project, preferential lending programs and favorable offers for other banking products.
• Free subscription to the multimedia services of a partner company.
• Mortgage subsidy.
• A wide range of discount programs, discounts and privileges from partner companies.