Question
Full-time
Remote
10+

Senior BackEnd (Physical design) Engineer

10/22/2025

The Senior BackEnd Engineer will work on complex design challenges, focusing on high frequency and low-power budget. The role involves ramping up the full RTL2GDSII flow for leading technology and collaborating with external vendors.

Working Hours

40 hours/week

Company Size

51-200 employees

Language

English

Visa Sponsorship

No

About The Company
AI is transforming industries at an unprecedented scale - but today’s data center infrastructure wasn’t built to keep up. As AI workloads grow more complex and data volumes double every two years, connectivity - not compute - has become the bottleneck. Retym is solving this challenge by delivering next-generation Coherent DSP solutions that provide high-performance, low-latency connectivity for AI infrastructure and data center interconnects. We are a semiconductor company driven by innovation, bringing together a world-class team of chip designers, optical networking experts, and leading investors to rethink how data moves in the AI era. Our purpose-built DSP technology delivers: Scalable, high-bandwidth interconnects for AI-driven data centers Power-efficient, high-performance networking that removes bottlenecks A coherent DSP provider that gives module makers more control and builds toward a more open, vibrant ecosystem With hyperscalers deploying AI across multiple locations and AI infrastructure requirements rapidly evolving, Retym is building the connectivity backbone for the future of AI. The future of AI isn’t just about compute - it’s about how we move data. Together, we are building a novel semiconductor technology that will transform the datacenter and telecommunications industries.
About the Role

For an exciting well-funded start-up, we are looking for a Backend Team member.

You will work on complex design, high frequency and low-power budget. Work on ramp-up full RTL2GDSII flow for leading technology and work with external vendors.


Requirements

Key responsibilities:

  • RTL-to-GDSII Ownership: execute the complete backend implementation flow (Logic Synthesis, P&R, Tape-Out, IR-drop, etc.), ensuring timely, first-pass silicon success.

·               Constraints & Timing Closure: Work with design and DFT engineers to write timing and physical constraints, and sign-off on the design using comprehensive Static

Timing Analysis (STA), timing eco implementation.

·               Advanced Physical Implementation: Drive complex physical design tasks including Floorplanning, Power/Ground (PG) Mesh implementation, and handling advanced

clocking (CTS/Clock-Mesh) and Hierarchical Design flows.

·               Low Power Expertise: Define, implement, and verify advanced low power design techniques to meet aggressive power consumption targets.

·               Design for Manufacturability: Implement and verify Design-for-Test (DFT) strategies and close physical verification challenges, specifically focusing on IR-Drop

analysis.

·               IP Integration & Automation: Execute complex IP integration, incorporating blocks generated by memory compilers and other automated tools.

  • Collaboration: work closely with design team to understand the data path and correctly implement the floorplan, provide feedback on RTL changes required, Implement logical eco post RTL freeze with design team.
  • CAD: Improve existing implementation flows to achieve better QOR, write scripts for supporting the P&R flows.

Minimum Qualifications 

  • Experience of 10+ years in backend design
  • Strong expertise of full RTL2GDSII including:
  • Logic synthesis & equivalence checking
  • Constraints definition and writing
  • Complicated IP integration
  • Memory compilers and other automated block generators
  • DFT
  • Floorplanning, PG Mesh
  • P&R
  • Low power design including definition, implementation and verification
  • Timing STA
  • IR-Drop
  • BS/MS in EE/CE from lead universities     

Preferred Qualifications

  • Team player
  • Highly motivated
  • Learning abilities
  • Good communication
  • Work with external vendors
  • Experience in Synopsys/Cadence tools is an advantage
  • Low power techniques
  • Clock-mesh/ multi source cts
  • Hierarchical design flow
  • Experience in tape-out procedures
  • RTL code reading

A very interesting job and good conditions are guaranteed to the candidates

Key Skills
Backend DesignRTL2GDSIILogic SynthesisEquivalence CheckingConstraints DefinitionIP IntegrationMemory CompilersDFTFloorplanningPG MeshP&RLow Power DesignTiming STAIR-DropSynopsys ToolsCadence ToolsHierarchical Design Flow
Categories
TechnologyEngineeringSoftware
Apply Now

Please let Retym know you found this job on InterviewPal. This helps us grow!

Apply Now
Prepare for Your Interview

We scan and aggregate real interview questions reported by candidates across thousands of companies. This role already has a tailored question set waiting for you.

Elevate your application

Generate a resume, cover letter, or prepare with our AI mock interviewer tailored to this job's requirements.