{"id":3877513,"url":"https://alion.io/job/groupe-iliad-deep-tech-networking-engineer-dpdk-linux-paris-hf","title":"Deep Tech Networking Engineer, DPDK / Linux - Paris - H/F","company":{"id":6961,"name":"Groupe Iliad","domain":"iliad.fr","url":"https://alion.io/company/groupe-iliad","size_band":"1001-5000","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"SmartRecruiters","truth_index":{"grade":"B","score":80,"open_postings":18,"ghost_share":0,"stale_share":1,"repost_share":0,"time_to_fill_p50_days":21,"computed_at":"2026-11-11T05:49:22Z"}},"role":"DevOps","role_family":"DevOps","seniority":null,"employment_type":"full_time","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Paris, France"],"countries":["FR"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Linux","optional":false},{"name":"U-Boot","optional":false},{"name":"VLAN","optional":false},{"name":"C","optional":true}],"status":"live","first_seen_at":"2026-11-06T14:22:08Z","employer_posted_date":"2026-11-06","last_verified_at":"2026-11-11T10:16:33Z","board_verified":true,"closed_at":null,"days_open":4,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":4},"description":"At Free/Iliad, we build embedded networking products including 5G and edge gateways, OLTs, carrier-grade routers and NPU-based appliances.\nOur systems forward tens to hundreds of Gbps on Arm64 SoCs, x86, ASICs and DPUs, within strict power and hardware constraints. The dataplane runs on DPDK or dedicated hardware, while Linux remains the control plane.\nPerformance is not theoretical. We measure Mpps, p99 latency, jitter and watts per Gbps on real hardware deployed at scale.\nOpen source is also central to how we work. Rather than maintaining private patches through every rebase, we contribute improvements to DPDK, Linux, U-Boot and Buildroot. Depending on the project and your experience, upstream work may represent between 20% and 80% of your time. It is planned and tracked like any other deliverable.\nWe are looking for engineers who want to make packets go faster, understand why they go faster and prove it with numbers.\n Your role :\nYou will design, develop and optimise high-performance networking systems from the hardware to the dataplane.\nYour responsibilities will include:\nBuilding packet-processing pipelines with DPDK, including PMDs, mempools, mbufs, rings, lcores, eventdev, graph libraries and QoS.\nConnecting the Linux control plane to the dataplane by synchronising routes, neighbours and interfaces through netlink.\nMaintaining exception paths to the kernel using technologies such as virtio-user, TAP and shared-memory rings.\nDeveloping Linux networking on embedded targets, including netdev and PHY drivers, phylink, DSA, switchdev, TC flower, XDP and AF_XDP.\nWorking close to the hardware with VFIO, IOMMU, hugepages, CPU isolation, device trees, U-Boot and Buildroot.\nProfiling and measuring performance with perf, ftrace, bpftrace, PMU counters, TRex, pktgen and testpmd.\nInvestigating complex production issues such as intermittent packet drops, descriptor exhaustion, cache contention and IOMMU faults.\nWorking directly with SoC and NIC vendors on drivers, firmware interfaces and upstreamable solutions.\nSubmitting and reviewing patches, responding to maintainers and following changes until they are merged.\nWriting design documents, reviewing code and helping other engineers grow.\nYour scope will depend on your experience. You may start by owning a feature, a PMD or a board family, or take responsibility for the architecture of an entire dataplane subsystem across several products.\nDuring your first year, you will bring up our stack on target hardware, reproduce existing performance baselines and deliver a measurable improvement on a production platform.\n Your profile :\nWe are open to both experienced open-source contributors and engineers with excellent foundations who want to develop deep expertise in Linux networking and packet processing.\nYou have:\nStrong C programming skills and a solid understanding of Linux systems.\nGood knowledge of L2 and L3 networking, including Ethernet, VLAN, IPv4/IPv6, ARP/ND, routing, FIB lookups, VXLAN, GRE and IPsec.\nExperience with DPDK or another high-performance packet-processing stack such as VPP, ODP, AF_XDP or OVS-DPDK.\nAn understanding of performance topics such as caches, NUMA, DMA, PCIe and SR-IOV.\nExperience or strong interest in Linux kernel networking, embedded systems, drivers, cross-compilation or board bring-up.\nA disciplined approach to optimisation: measure, change, compare and document.\nClear written English for technical documentation, code reviews and upstream discussions.\nYou do not need to have mastered every technology listed in this announcement. We will pay particular attention to what you have built, how deeply you understand it and how you demonstrate its technical impact.\nPublic open-source contributions are valuable. If your strongest work is closed-source, be ready to explain the technical decisions you made, the constraints you faced and the results you achieved.\nFor Staff and Senior Staff positions, we expect a proven public track record through patches, reviews, maintainer responsibilities or contributions to projects such as DPDK, Linux, U-Boot, Buildroot, Zephyr, Yocto, FRR or VPP.\nExperience with SmartNICs or DPUs such as NVIDIA BlueField, Marvell OCTEON, NXP DPAA2 or Intel IPU is a plus, as is experience with switchdev, SAI, SONiC, PTP, TSN, KernelCI, LAVA or DPDK DTS.\nWhat matters most is what you have shipped, what you can demonstrate and the technical impact you want to create.\n Recruitment process\n15-minute phone screen with Steve, the recruiter\n30-minute interview with Vincent, the hiring manager\n60-minute technical interview\n60-minute HR interview with Sarah and Steve\nBenefits :\nProfit-sharing and incentive scheme based on the Group’s performance\nReimbursement of your Free home internet plan\nOne to two remote-working days per week\nSecure bicycle parking\nOn-site restaurants and cafeteria\nNumerous internal mobility opportunities across the Iliad Group\nRegular training opportunities and access to Free University to develop your skills\nUnique workspaces located in an iconic building that is part of Paris’s architectural heritage\nPublic transport costs reimbursed up to 70%\nSwile meal card worth €10 per working day, with 60% covered by the company\nComprehensive health and income protection coverage\nTime Savings Account, known in France as a Compte Épargne Temps or CET\nEmployee benefits through the CSE, including gift vouchers, discounts and exclusive offers\nLe groupe Iliad s’engage pleinement en faveur de ses collaborateur·rice·s, à travers une politique stricte de non-discrimination et de lutte contre le harcèlement. 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