{"id":3028006,"url":"https://alion.io/job/cisco-systems-splunk-senior-staff-software-engineer-performance-optimization-innovation-perfopt","title":"Splunk Senior Staff Software Engineer - Performance Optimization & Innovation (PerfOpt)","company":{"id":90,"name":"Cisco Systems","domain":"cisco.com","url":"https://alion.io/company/cisco-systems","size_band":"5000+","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Workday","truth_index":{"grade":"A","score":86,"open_postings":235,"ghost_share":0.021,"stale_share":0.455,"repost_share":0.077,"time_to_fill_p50_days":25,"computed_at":"2026-10-26T05:57:25Z"}},"role":"Backend","role_family":"Backend","seniority":"staff","employment_type":"full_time","work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Kraków, Poland"],"countries":["PL"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":112000,"max_usd":178000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":25},"experience_years_min":8,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Agentic Workflows","optional":false},{"name":"AI Agents","optional":false},{"name":"Amazon S3","optional":false},{"name":"C++","optional":false},{"name":"Docker","optional":false},{"name":"eBPF","optional":false},{"name":"Git","optional":false},{"name":"GitLab CI","optional":false},{"name":"Kubernetes","optional":false},{"name":"Linux","optional":false},{"name":"Python","optional":false},{"name":"Splunk","optional":false},{"name":"Ansible","optional":true},{"name":"AWS","optional":true},{"name":"Azure","optional":true},{"name":"GCP","optional":true},{"name":"Puppet","optional":true},{"name":"Rust","optional":true},{"name":"Terraform","optional":true}],"status":"live","first_seen_at":"2026-10-06T00:00:00Z","employer_posted_date":"2026-10-06","last_verified_at":"2026-10-26T12:09:27Z","board_verified":true,"closed_at":null,"days_open":20,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":20},"description":"Meet The Team\nThe Performance Optimization and Innovation (PerfOpt) team improves the Splunk customer experience through deep performance work, and sets Splunk's long-term performance standards through guidelines and design.\nWe work where performance is won or lost: search and indexing hot paths, cache and bloomfilter efficiency, S3 transfer throughput, I/O workload management, and parallelism in the data retrieval path. It's a C++ core moving petabyte-scale data across a large distributed architecture, and the results land in what customers feel - search latency, ingest throughput, and infrastructure cost. We are also the organization's performance center of gravity: the benchmarking, design patterns, and engineering standards other teams adopt come from here.\nYour Impact\nServe as the performance authority for critical issues, roadmap planning, architecture reviews, and customer conversations. Set technical direction across teams.\nLead a performance domain end to end -hypothesis, instrumentation, design, measured customer-visible gain in production including cross-team problems nobody has framed yet.\nArchitect for scale - design and re-architect subsystems in a distributed, petabyte-scale system: memory hierarchy, concurrency, I/O, tail-latency.\nBe responsible for the performance methodology - profiling and flame graph practice, lock contention analysis, benchmarking, CI regression gating.\nIntroduce observability - design new telemetry sources and bring eBPF and continuous profiling into production use, so performance is measurable in the field, not just the lab.\nEnable leadership decisions - explain Directors and Managers on what the problem costs, what each option buys and costs, and the risk of inaction, with a recommendation you stand behind. A multi-week investigation becomes a one-page comparison they can act on in ten minutes.\nDeliver fast and make everyone faster - work agentically, and build reusable AI agentic workflows and tooling that cut the team's analysis loops from days to hours. Navigate AI optimization: point agents at changes that move the numbers, catch work that fails under a profile, redirect quickly.\nLead and mentor senior and staff engineers.\nMinimum Qualifications\nTechnical depth\nExpert-level C++ in production systems - memory management and allocators, move semantics, cache-friendly data structures, and a real command of the language's cost model.\nDeep performance engineering - depth across all of the below, production experience with several:\nCPU/memory profiling and flame-graph analysis (perf, eBPF, VTune), including off-CPU and continuous profiling.\nLock contention resolution - hot mutexes, false sharing, atomics and memory ordering, lock-free techniques and when not to use them.\nLatency optimization in distributed architectures - tail latency, queuing, fan-out amplification, back-pressure, critical path analysis.\nBenchmarking - micro and workload benchmarks, sound test design and statistical analysis, sub-system validation CI regression detection.\nPerformance modelling - analytical and capacity models that predict scaling limits and validate measured results\nArchitecture and system design -design and re-architect existing solutions for performance, scalability and operability, and defend those designs to a critical audience.\nDocker and Kubernetes - performance characterization in containerized environments.\nStrong Python for tooling, benchmark harnesses, telemetry pipelines, and performance data analysis.\nLinux performance internals - scheduler, memory subsystem, page cache, filesystems, block I/O, network stack.\n Git and CI (e.g. GitLab CI) for automating builds, tests, benchmarks, and releases.\nLeadership\nTrack record of informing leadership decisions - quantifying trade-offs, surfacing risk early.\nDistilling complex problems into comparable data points without losing the nuance or hiding uncertainty.\nClear, concise, high-signal communication across audiences - mechanism-level with engineers, trade-off-level with leadership, impact-level with customers.\nAI savviness applied to delivery speed - daily use of AI coding agents on production work, building agentic workflows others adopt and setting the bar for verifying AI output against profiles, benchmarks, and telemetry.\nLead, mentor and grow engineers at every level - coaching junior engineers into ownership, and influencing senior and staff peers through technical leadership rather than authority.\nExperience\nBachelor's + 12 years, Master's + 8 years, or PhD + 5 years of related experience, with specialized depth and breadth sufficient to advise management.\nPreferred Qualifications\nPetabyte-scale data flow - ingest, storage, retrieval and search at scale, object storage (S3) access patterns, caching and eviction, I/O workload management.\nSplunk internals, or a comparable search, analytics, or large-scale data platform.\nStorage / query engine, or distributed search optimization.\nHardware-level work - SIMD, NUMA, cache/TLB behavior, PGO/LTO, compiler optimization.\nGo, Rust, or another systems language alongside C++.\nAWS, Azure, or GCP -storage, networking, and instance performance characteristics.\nTerraform, Puppet, or Ansible for reproducible performance test environments.\nWhat We Offer You\nPerformance problems at a scale very few companies have - petabytes of data, real customers, and measurable impact from every millisecond you remove!\nA constant stream of new things to learn. We're always expanding into new areas, bringing in open source projects and giving back, and exploring new technologies.\nExceptionally versatile and dedicated peers, from engineering to product management to customer support.\nCareer growth through technical ownership, leadership opportunities, and coaching.\nA stable work environment with clear ownership and measurable goals.\nFlexible hybrid work model (balanced work-from-home and in-office collaboration)\nSplunk is an equal opportunity employer. We welcome applicants of all backgrounds and provide reasonable accommodations throughout the hiring process. Benefits include flexible hybrid work, growth and mentorship opportunities, and a collaborative, supportive team.\nWhy Cisco?\nAt 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.\nFueled 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.\nWe are Cisco, and our power starts with you.","description_format":"text","description_chars":7031,"description_truncated":false,"requirements":{"experience_years_min":8,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","optional":false},"security_clearance":false,"languages":[]},"benefits":["Hybrid work"],"hiring_locations":[{"name":"Poland","iso":"PL","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Network Security","Unified Communications","Endpoint Security","Observability & APM"],"lifecycle":[{"event":"open","at":"2026-10-21T19:38:12Z"}],"visa":[],"liveness":{"score":64,"band":"ok","label":"Likely open","p_open":1,"p_active":0.85,"p_room":0.75,"age_days":20,"expected_fill_days":25,"reasons":["conf:1","velocity","win:late","comp:brand"],"computed_at":"2026-10-26T05:57:25Z"},"pay":null,"html_url":"https://alion.io/job/cisco-systems-splunk-senior-staff-software-engineer-performance-optimization-innovation-perfopt","json_url":"https://alion.io/job/cisco-systems-splunk-senior-staff-software-engineer-performance-optimization-innovation-perfopt.json","meta":{"generated_at":"2026-10-26T15:17:26Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers","about":"Alion is a live layer of people, companies and AI agents: who they are, whether they are real and active right now, what they do and how to work with them, readable by people and by agents and paid per call.","catalog":"https://alion.io/catalog.json","usage":{"tier":"crawler_verified","counted_by":"address","units_charged":1,"used_today":20303,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-27T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.02,"usd":0.002,"plus_per_slice":{"credits":0.05,"usd":0.005}},"unit":"per company, plus each slice with data","note":"the employer in depth","call":{"mcp_tool":"get_company","arguments":{"id":90},"rest":"https://alion.io/mcp/rest/get_company?id=90"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fcisco-systems-splunk-senior-staff-software-engineer-performance-optimization-innovation-perfopt"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":1,"usd":0.1},"unit":"per slice","note":"pay, demand and time to fill for this role and place","call":{"mcp_tool":"market_stats"},"human":"https://alion.io/catalog?offer=market.stats&for=job%2Fcisco-systems-splunk-senior-staff-software-engineer-performance-optimization-innovation-perfopt"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.02,"usd":0.002},"unit":"per posting in a list","note":"similar open postings","call":{"mcp_tool":"search_jobs"},"human":"https://alion.io/catalog?offer=job.search&for=job%2Fcisco-systems-splunk-senior-staff-software-engineer-performance-optimization-innovation-perfopt"},{"id":"company.verify","title":"Is this company real and active right now","status":"pilot","price":null,"unit":"per company","request":{"url":"https://alion.io/catalog/request","method":"POST","body":"{\"offer\": \"company.verify\", \"for\": \"job/cisco-systems-splunk-senior-staff-software-engineer-performance-optimization-innovation-perfopt\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fcisco-systems-splunk-senior-staff-software-engineer-performance-optimization-innovation-perfopt"}]}