{"id":733155,"url":"https://alion.io/job/celerocommunications-sr-principal-application-engineer","title":"Sr. Principal Application Engineer","company":{"id":668982,"name":"Celero Communications","domain":"celerocommunications.com","url":"https://alion.io/company/celerocommunications","size_band":"201-500","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Greenhouse","truth_index":{"grade":"B","score":80,"open_postings":5,"ghost_share":0,"stale_share":0.8,"repost_share":0,"time_to_fill_p50_days":35,"computed_at":"2026-10-30T05:48:23Z"}},"role":"Industrial Engineering","role_family":"Industrial Engineering","seniority":"lead","employment_type":null,"work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Irvine, United States"],"countries":["US"],"hiring_countries":[],"hiring_countries_total":0,"salary":{"min":175000,"max":225000,"currency":"USD","period":"year","gross":null,"usd_annual":225000},"salary_estimate":null,"experience_years_min":8,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"MATLAB","optional":true},{"name":"Python","optional":true}],"status":"live","first_seen_at":"2026-07-31T00:12:42Z","employer_posted_date":"2026-09-29","last_verified_at":"2026-10-30T23:06:05Z","board_verified":true,"closed_at":null,"days_open":92,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":92},"description":"About the Role\nCelero is seeking a hands-on, highly motivated Coherent DSP Applications Engineer to help bring next-generation coherent optical DSP solutions from the lab to customer deployment. This role is ideal for someone who thrives in a fast-paced startup environment, enjoys solving complex technical challenges, and wants to make a direct impact on both products and customers.\nAs a key member of the team, you will work closely with DSP, ASIC, hardware, firmware, and product engineering teams, while partnering directly with hyperscale customers and strategic partners to integrate, validate, debug, and optimize coherent DSP-based optical solutions.\nThis position offers a unique opportunity to influence product direction, contribute to customer success, and help shape the future of high-speed optical connectivity for AI infrastructure and cloud networking.\nWhat You'll Do\nCustomer Integration and Technical Leadership\nServe as the technical owner for customer integration and deployment of coherent DSP-based optical modules and systems.\nWork directly with hyperscalers, network equipment manufacturers (NEMs), and strategic partners to support:\nSystem design and architecture discussions\nPlatform integration and bring-up\nInteroperability and qualification testing\nField trials and early customer deployments\nConfigure, tune, and optimize coherent DSP parameters to maximize performance and reliability.\nDebug and System Validation\nTroubleshoot complex issues spanning multiple disciplines, including:\nDSP algorithms and signal processing\nOptical impairments, including chromatic dispersion (CD) and differential group delay (DGD)\nHost electrical interfaces, including 200G/400G/800G PAM4 and beyond\nModule management and control interfaces, including CMIS and telemetry\nAnalyze system performance metrics, including BER, Q-factor, SNR, and debug logs, and drive issues to root cause.\nSupport interoperability testing in multi-vendor environments.\nCross-Functional Collaboration\nPartner closely with DSP, ASIC, hardware, firmware, and systems engineering teams to resolve issues and improve product performance.\nContribute to technical documentation, application notes, validation reports, and customer-facing materials.\nProvide direct feedback to engineering and product teams on feature prioritization, product requirements, and roadmap decisions.\nWhat You Bring\nBachelor's, Master's, or PhD in:\nElectrical Engineering\nCommunications Engineering\nOptical Engineering\nApplied Physics\nRelated technical discipline\n8+ years of experience\" and \"ability to travel up to 25-40% to customer sites as needed\nStrong fundamentals in digital signal processing, telecommunications theory, and optical communications.\nHands-on experience with:\nCoherent modulation techniques, including QPSK and 16-QAM\nForward Error Correction (FEC) and framers\nDWDM optical systems and coherent transceivers\nExperience debugging complex hardware and software interactions in a laboratory environment.\nAbility to independently solve ambiguous, cross-functional technical problems.\nAbility to generate technical documentation, such as Applications notes, Data sheets, Product requirement Documents, etc. \nExcellent communication skills and the ability to work directly with customers and internal engineering teams.\nPreferred Qualifications\nExperience supporting coherent optical module products, including:\n400ZR\n800ZR\nCoherent Lite\nFamiliarity with QSFP-DD and OSFP coherent modules.\nKnowledge of high-speed host electrical interfaces, including CEI-112G, PAM4, and next-generation standards.\nExperience using Python, MATLAB, or similar tools for analysis, automation, and data processing.\nExperience working with hyperscalers, network equipment manufacturers (NEMs), or cloud infrastructure providers.\nExposure to open networking environments and multi-vendor interoperability testing.\nHow You'll Succeed\nYou are comfortable working in ambiguous environments and can make progress without perfect specifications.\nYou take ownership and drive issues to resolution from initial discovery through deployment.\nYou communicate complex technical concepts clearly to customers, partners, and internal stakeholders.\nYou enjoy learning quickly and contributing beyond a narrowly defined role.\nYou are excited to help shape not only a product, but also a company and its culture.\nWhy Join Celero?\nWork on cutting-edge coherent DSP technology powering next-generation AI infrastructure and optical networking.\nMake a direct impact on product direction and customer success.\nCollaborate with a small, highly experienced engineering team.\nGain exposure across DSP, optics, ASICs, firmware, systems, and customer applications.\nGrow your career quickly in a dynamic startup environment with significant opportunities for leadership and ownership.\nSalary Range\n$175,000 - 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