Senior RDMA Performance Engineer

🔥 3 minutes ago

🇵🇱 Poland – Remote

💵 zł22k - zł30k / month

⏳ Contract/Temporary

🟠 Senior

👷🏻‍♀️ Engineer

👻 Ghost score 1%

What it means: how likely this posting is sitting open without active hiring.How to read it: 60% or higher means we think this is a ghost. Lower scores are less of a worry.How we score it: age, reposts, open roles vs team size, how fast jobs close, and whether pay is listed.Fine print: an estimate from public data, not a judgment of the company. Real jobs can score high, so treat it as a hint, not a fact.

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CodiLime

WebsiteLinkedInAll Job Openings

201 - 500 employees

Founded 2011

🤝 B2B

📡 Telecommunications

🔧 Hardware

B2B • Telecommunications • Hardware

CodiLime is a software and network engineering services company that partners with networking hardware vendors, software providers, and telecommunications firms to create proofs-of-concept, develop new products, and support production environments. Founded in 2011 and grown to 300+ employees, the company specializes in network automation, low-level systems programming, observability, DevOps, and cybersecurity, serving clients worldwide (US, Japan, Israel, Europe). CodiLime primarily operates as a B2B service provider to tech startups and large industry players.

📋 Description

• Configure, troubleshoot, and maintain NVIDIA/Mellanox Spectrum switches and ConnectX Network Interface Cards (NICs) • Implement and tune RoCEv2, Priority-based Flow Control (PFC), and Explicit Congestion Notification (ECN) for AI workloads • Optimize network environments for maximum throughput, minimal latency, and minimal Job Completion Time (JCT) • Conduct performance benchmarking and validation testing on AI-ready data center fabrics using RDMA and NVIDIA Collective Communication Library (NCCL) • Use AI agents and specialized tools to automate routine network tasks, perform testing, and analyze network telemetry • Author and maintain technical documentation covering network designs, configurations, and benchmarking results • Work as part of an Agile project team in a startup environment on a US-client project

🎯 Requirements

• 7+ years of professional experience in network engineering • Preferably 3+ years specifically focused on data center network design and architecture • Hands-on experience configuring and troubleshooting BGP, EVPN/VXLAN, LACP, and ECMP • Deep understanding of AI-dedicated data center designs, including Rail-Optimized Design (ROD) and Rail-Unified Design (RUD) topologies, with practical hands-on configuration and deployment experience • Proven experience configuring, managing, and troubleshooting NVIDIA/Mellanox Spectrum switches and ConnectX Network Interface Cards (NICs) • Deep understanding of RoCEv2, Priority-based Flow Control (PFC), and Explicit Congestion Notification (ECN) • Experience tuning switch buffers and implementing Quality of Service (QoS) policies • Experience conducting performance benchmarking and validation for AI-ready data center fabrics using RDMA and NVIDIA Collective Communication Library (NCCL) • Ability to leverage AI agents/tools to automate tasks, testing, and analysis • Strong technical documentation skills and professional English communication • Professional-level certifications such as CCNP/CCIE Enterprise/DC, JNCIP, or equivalent are nice-to-haves • Hands-on experience with pyATS, NAPALM, Batfish, Nornir, or NetBox is a nice-to-have • Exposure to GitLab CI, GitHub Actions, Jenkins, and infrastructure-as-code concepts is a nice-to-have

🏖️ Benefits

• Flexible working hours and approach to work: fully remotely, in the office or hybrid • Professional growth supported by internal training sessions and a training budget • Solid onboarding with a hands-on approach to give you an easy start • A great atmosphere among professionals who are passionate about their work • The ability to change the project you work on