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IS-Wireless Linkedin ยท Posted 11d ago

C / C++ Software Engineer (Mid & Senior)

Poland

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๐Ÿ”ง C / C++ Software Engineer (Mid & Senior)


We're hiring Mid and Senior engineers for two complementary roles โ€” both building ultra-resilient 5G/6G network software for military, critical infrastructure, and enterprise clients. IS-Wireless is a Polish deep-tech company and NATO DIANA partner.


If you work in C or C++, one of these is for you.


๐Ÿ”ท ROLE 1 โ€” C++ Software Engineer (L1 ยท PHY Layer)

Develop low-level physical layer (Layer 1) software: signal processing, PHY/MAC, O-RU integration, and performance optimization (3GPP, O-RAN, ETSI).

Must-have:

โœ” 3+ years C++ (C++14/17/20) in performance-critical systems

โœ” DSP fundamentals + 5G NR PHY concepts (OFDM, MIMO, LDPC/Polar)

โœ” SIMD vectorization (SSE/AVX/NEON), multithreading, lock-free design

โœ” Embedded Linux (x86/ARM), CMake, Git, profiling (gdb/perf/VTune)

โœ” Very good English

Nice to have: O-RAN fronthaul (eCPRI), FPGA/GPU/DSP accelerators, DPDK


๐Ÿ”ท ROLE 2 โ€” C Developer (L2/L3 ยท System Software)

Join the L2/L3 team building high-performance data processing engines and system-level components in C99 โ€” computational challenges, not protocol specs.


Must-have:

โœ” 3+ years professional C (C99) โ€” system programming focus

โœ” Algorithms, data structures, computational complexity optimization

โœ” Multi-threading, memory management, high-performance computing

โœ” Linux systems programming, debugging tools, performance analysis

โœ” Very good English


Nice to have: HPC/parallel processing, packet processing, lock-free data structures


What We Offer โ€” All Roles

  • Competitive salary package that grows with your experience and impact
  • Ownership of cutting-edge, patent-worthy technology that shapes global connectivity
  • Diverse, friendly, and talented international team of engineers and domain experts
  • Collaborative, low-ego environment that rewards initiative and values your input
  • Flexible working hours that promote healthy work-life balance
  • Regular integration events that foster team bonding and camaraderie
  • Real-World Impact: Your work directly supports ultra-resilient 5G networks in critical environments
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