What You'll Do
We are looking for a talented and experienced Digital Design Engineer to join the Silicon One Optics Group (S1O) Digital Design Team and drive the digital design and integration of Cisco’s silicon photonics integrated circuits for next generation 100G, 200G, and 400G per lambda solutions.

In this role, you will own RTL design, and subsystem integration of digital logic used in high-performance optical interconnect products. You will work closely with analog/mixed-signal designers, verification engineers, physical design, DFT, firmware, packaging, process, and product engineering teams to develop robust, high-quality, and manufacturable designs that meet performance, power, reliability, and production requirements.

With a robust understanding of digital systems, RTL development, mixed-signal integration, ASIC/SoC design flow, and implementation readiness, you will participate in all phases of digital design from concept through tapeout and production support. You will drive block-level digital development for control functions, interfaces, receive/transmit paths,



and integrated high-speed interface circuitry within a silicon photonics module, CPO (Co-Packaged Optics) engine.
Specific responsibilities include:
· Own the RTL design of complex digital blocks and subsystems.
· Drive RTL design and integration for control functions, high speed interfaces, and receive/transmit paths.
· Own and review RTL quality, ensuring best practices in coding style, reuse, maintainability, and design robustness.
· Document block-level and top-level design specifications, interface definitions, and implementation plans.
· Work across analog and digital interfaces to ensure seamless mixed-signal integration.
· Collaborate closely with verification teams to define test plans, review coverage, debug issues, and ensure design intent is fully verified.
· Support full-chip integration involving high-speed IPs such as D2D IP, SerDes XSR, and integrated drivers/TIA.
· Support s

📌 ASIC Digital Design Engineer (Pune)
🏢 Cisco
📍 Pune