Wireless Netwrok Protocol Engineer

6 days ago

New Delhi, India 7 Darter Full time

About the Role We are building a next-generationSDR-based wireless mesh networkfor real-timevoice, video, and datain challenging environments. Our stack includes a customPHY ,frequency hopping , andmulti-hop MANET routing . We’re looking for aWireless Network Protocol Engineerwho can bridge the gap betweenradio hardware (SDR)andLinux networking , designing robust MAC / link-layer protocols and integrating them withmesh routing (e.g., batman-adv) . If you enjoy making packets survive over noisy RF links, tuning protocols at MAC level, and working close to the metal, this role is for you.Key ResponsibilitiesDesign & implement the radio MAC / link layeron top of our existing PHY: Frame structure, sequence numbers, ARQ/retransmissions Fragmentation / reassembly for larger packets Basic QoS for voice, video, and file/data traffic Integrate the radio with Linux networking: Expose the radio as aLinux network interface (netdev)(e.g., sdr0) Make it work seamlessly withbatman-advor similar mesh / MANET protocols Support standard IP networking over the mesh Work with frequency hopping and scheduling: Implement time-slot based transmission andfrequency hopping patterns Design a link-layer scheduler that respects QoS and slot timing Performance & reliability: Measure and optimisethroughput, latency, and packet lossover multi-hop links Tune parameters (MTU, retries, timers, CW, etc.) based on real-world tests Collaboration: Work closely with thehardware / SDR / FPGA teamon timing, RF tuning, and integration Coordinate withapplication / AI / backend teamsto understand traffic patterns and QoS needs Documentation & testing: Write clear documentation for protocols, APIs, and configuration Develop test plans, simulation setups, and on-device tests for various topologiesMust-Have QualificationsStrong proficiency inCfor systems / embedded programming Solid understanding ofcomputer networking fundamentals : Ethernet, ARP, IP, UDP/TCP L2 vs L3, routing vs bridging, MTU, fragmentation Hands-on experience withwireless protocols at MAC / driver level , for example: Wi-Fi (802.11), 802.11s mesh, Wi-SUN, LoRa/LoRaWAN, 6LoWPAN, ZigBee, or similar Experience withLinux networking : Working with network interfaces, routing, bridging Using tools like ip, tcpdump, wireshark, tc, etc. Exposure to at least one of: Mesh / ad hoc networking(batman-adv, OLSR, Babel, 802.11s, OpenWrt) Software Defined Radio (SDR)(USRP, GNU Radio, LimeSDR, etc.)Nice-to-Have SkillsExperience writing or modifyingLinux network drivers(netdev): Familiarity with ndo_start_xmit, netif_rx, SKBs, and kernel networking APIs Knowledge ofOFDM / COFDM , SNR, link budgets, and RF basics Experience withfrequency hoppingand time-synchronised TDMA or similar schemes Familiarity withOpenWrtor embedded Linux systems Experience withnetwork security / crypto , such as: WireGuard, IPsec, TLS, or custom link-layer encryption Prior work onMANET research(ns-3 simulations, academic projects, theses, etc.)What We’re Looking For (Mindset)You like workingclose to the hardware , not just at the application layer You’re comfortable debugging withtcpdump, Wireshark, logic analyzers, and RF tools You enjoy reading specs, protocol RFCs, and digging into kernel code when needed You can take a high-level “we need voice + video over a mesh in bad RF conditions” requirement and turn it into a concrete protocol and implementation plan

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