STA Engineer Jobs: Find Timing Signoff Roles in Semiconductor

Static timing analysis is the timing-signoff gate every digital chip passes before tapeout. STA engineers own that gate: they certify that every flip-flop in the design meets setup and hold across all process, voltage, and temperature corners, including AOCVM and POCV at advanced nodes. Get the methodology wrong and the chip silently fails at speed or temperature; get it right and physical design has a clear target to close to.

The day-to-day work centers on Synopsys PrimeTime, which dominates the market for production signoff. Cadence Tempus shows up at companies that have invested in the Cadence toolchain end-to-end, but PrimeTime fluency is what most postings list as a hard requirement. The methodology side runs deep: SDC constraint writing (set_input_delay, set_output_delay, set_clock_groups, set_multicycle_path, set_false_path), MCMM analysis across multiple operating modes, ECO-driven fixes, and AOCVM and POCV variation modeling at 7nm and below.

Physical design and STA work the same problem from opposite ends. Physical design engineers shape the layout to meet timing; STA engineers measure whether the result actually passed. Many STA engineers come into the role from physical design after a few tapeouts, when they've seen enough timing-driven ECOs to want to own the methodology layer. Timing closure engineering is a closely related specialization focused specifically on the ECO loop near tapeout. ASIC design engineering is the broader category that includes the front-end work upstream.

Compensation for senior STA engineers at tier-one fabless companies runs $170K to $240K total comp, with staff and principal levels at Apple, Qualcomm, AMD, and the hyperscalers clearing $300K. The pay reflects the bottleneck nature of the role: late-stage timing problems at advanced nodes can delay tapeout by weeks if no one on the team owns the methodology deeply. The salary guide tracks current ranges by region.

The interview signal STA roles look for: clean SDC writing habits, an instinct for whether a violation is real or a constraint bug, and experience with crosstalk-aware timing on advanced nodes. Most companies will ask you to walk through a tricky ECO from a past tapeout. Be specific about what the violation looked like, what tool path you took to isolate it, and what the fix turned out to be.

Save a search on semidesignjobs.com for STA, timing, or signoff in the title field, filtered to your seniority band, and new postings reach your inbox.

FAQ

What is the primary tool used in STA engineer jobs?

Synopsys PrimeTime is the industry-standard tool for static timing analysis and signoff. Cadence Tempus is an alternative used at companies invested in the Cadence toolchain end-to-end. The underlying timing methodology transfers between the two; PrimeTime fluency is what hiring managers ask for at most postings.

What is the difference between STA engineers and physical design engineers?

Physical design engineers shape the layout to meet timing: floorplanning, placement, clock-tree synthesis, routing. STA engineers measure whether the result actually passes signoff and own the methodology that defines what "passes" means at each corner. On small teams the two roles merge; on larger teams a dedicated STA engineer owns the signoff methodology while physical design engineers drive the layout.

What are the most important SDC concepts for STA engineer jobs?

Clock definitions (create_clock, create_generated_clock), I/O timing (set_input_delay, set_output_delay), multi-cycle and false-path exceptions, and clock-domain-crossing constraints. Senior STA roles add depth in managing exceptions without masking real violations, plus comfort with MCMM scenarios and AOCVM analysis at advanced nodes.