Principal DSP Engineer – Coherent Optical Transmission Systems - Acacia (Remote)

The application window is expected to close on 12/31/25Job posting may be removed earlier if the position is filled or if a sufficient number of applications are received. This role can be performed from any location within the United States. Meet the Teamat Acacia, where we design advanced optical transceivers for high-speed fiber optic transmission in data centers and telecommunication networks. We're seeking enthusiastic, experienced individuals to work on the forefront of fiber optic technology.You'll be part of the team developing Digital Signal Processing (DSP) and Forward Error Correction (FEC) algorithms for our optical transceivers' Application-Specific Integrated Circuits (ASICs). Collaboration with colleagues from the DSP and ASIC teams is key to optimizing performance and power efficiency. You'll contribute to system design, develop architectures, and support ASIC design and verification. Work closely with colleagues across various fields and gain diverse knowledge in optical system testing, analog components, modeling, and more.Your ImpactWithYour Expertise In DSP For Coherent Optical Transceivers, FEC, And Modeling, You HelpThe Team To DevelopThe Next Generation Of Low-power And High-performance Coherent Transceivers. Here Are Some Examples Of Possible Topics• Invent, simulate and validate new DSP or FEC algorithms (both in floating-point and fixed-point precision) to improve performance and functionality or lower power consumption• Test and optimize these algorithms on actual hardware and correlate performance with previous simulations• Develop models of analog RF and optical components and evaluate system performance with these models• Analyze performance of developed transceiver modules and update models and simulation environments to accurately match the measured resultsMinimum QualificationsTypically: Bachelors + 15 years of related experience, or Masters + 12 years of related experience, or PhD + 8 years of related experience• + 10 years of industry experience in related fields.• Experience with Digital Signal Processing (DSP) and/or Forward Error Correction (FEC) for coherent optical communications. • Experience in modeling communication systems. • Programming experience in C/C++, Python, Matlab, or similar languages. • A master's or Ph.D. degree in mathematics, physics, or electrical engineering is highly recommended, although not strictly required. Preferred QualificationsA master's or Ph.D. degree in mathematics, physics, or electrical engineering is highly recommended, although not strictly required.• Experience with C++, Linux, and version control systems, specifically SVN and Perforce. • Experience with Verilog or VHDL, and/or collaboration with ASIC designers. • Experience presenting technical information to colleagues. Why Cisco? At Cisco, we’re revolutionizing how data and infrastructure connect and protect organizations in the AI era – and beyond. We’ve been innovating fearlessly for 40 years to create solutions that power how humans and technology work together across the physical and digital worlds.These solutions provide customers with unparalleled security, visibility, and insights across the entire digital footprint. Fueled by the depth and breadth of our technology, we experiment and create meaningful solutions. Add to that our worldwide network of doers and experts, and you’ll see that the opportunities to grow and build are limitless. We work as a team, collaborating with empathy to make really big things happen on a global scale. Because our solutions are everywhere, our impact is everywhere.We are Cisco, and our power starts with you. Message to applicants applying to work in the U.S. and/or Canada:The starting salary range posted for this position is $225,000.00 to $325,300.00 and reflects the projected salary range for new hires in this position in U.S. and/or Canada locations, not including incentive compensation*, equity, or benefits. Individual pay is determined by the candidate's hiring location, market conditions, job-related skillset, experience, qualifications, education, certifications, and/or training.The full salary range for certain locations is listed below. For locations not listed below, the recruiter can share more details about compensation for the role in your location during the hiring process. U.S. employees are offered benefits, subject to Cisco’s plan eligibility rules, which include medical, dental and vision insurance, a 401(k) plan with a Cisco matching contribution, paid parental leave, short and long-term disability coverage, and basic life insurance. Please see the Cisco careers site to discover more benefits and perks.Employees may be eligible to receive grants of Cisco restricted stock units, which vest following continued employment with Cisco for defined periods of time. U.S. employees are eligible for paid time away as described below, subject to Cisco’s policies:• 10 paid holidays per full calendar year, plus 1 floating holiday for non-exempt employees• 1 paid day off for employee’s birthday, paid year-end holiday shutdown, and 4 paid days off for personal wellness determined by Cisco• Non-exempt employees receive 16 days of paid vacation time per full calendar year, accrued at rate of 4.92 hours per pay period for full-time employees• Exempt employees participate in Cisco’s flexible vacation time off program, which has no defined limit on how much vacation time eligible employees may use (subject to availability and some business limitations)• 80 hours of sick time off provided on hire date and each January 1st thereafter, and up to 80 hours of unused sick time carried forward from one calendar year to the next• Additional paid time away may be requested to deal with critical or emergency issues for family members• Optional 10 paid days per full calendar year to volunteerFor non-sales roles, employees are also eligible to earn annual bonuses subject to Cisco’s policies.Employees On Sales Plans Earn Performance-based Incentive Pay On Top Of Their BaseSalary, Which Is Split Between Quota And Non-quota Components, Subject ToThe Applicable Cisco Plan. For Quota-based Incentive Pay, Cisco Typically Pays As Follows•.75% of incentive bolthires for each 1% of revenue attainment up to 50% of quota;• 1.5% of incentive bolthires for each 1% of attainment between 50% and 75%;• 1% of incentive bolthires for each 1% of attainment between 75% and 100%; and• Once performance exceeds 100% attainment, incentive rates are at or above 1% for each 1% of attainment with no cap on incentive compensation.For non-quota-based sales performance elements such as strategic sales objectives, Cisco may pay 0% up to 125% of bolthires. Cisco sales plans do not have a minimum threshold of performance for sales incentive compensation to be paid. The applicable full salary ranges for this position, by specific state, are listed below:New York City Metro Area$225,000.00 - $374,100.00Non-Metro New York State & Washington State$208,600.00 - $330,000.00• For quota-based sales roles on Cisco’s sales plan, the ranges provided in this posting include base pay and sales bolthires incentive compensation combined.• Employees in Illinois, whether exempt or non-exempt, will participate in a unique time off program to meet local requirements. Apply tot his job