{"id":513071,"url":"https://alion.io/job/dremio-senior-staff-software-engineer-query-execution","title":"Senior Staff Software Engineer - Query Execution","company":{"id":58533,"name":"Dremio","domain":"dremio.com","url":"https://alion.io/company/dremio","size_band":"201-500","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Greenhouse","truth_index":null},"role":"Backend","role_family":"Backend","seniority":"staff","employment_type":null,"work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"posting_text","remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Portugal"],"countries":["PT"],"hiring_countries":["PT"],"hiring_countries_total":1,"salary":null,"salary_estimate":{"min_usd":62000,"max_usd":133000,"period":"year","method":"global_role_cell_scaled_by_country","sample_n":2415},"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Apache Iceberg","optional":false},{"name":"C++","optional":false},{"name":"Java","optional":false},{"name":"Hadoop","optional":true},{"name":"Spark","optional":true}],"status":"live","first_seen_at":"2026-09-07T04:45:10Z","employer_posted_date":"2026-09-07","last_verified_at":"2026-11-01T19:42:59Z","board_verified":true,"closed_at":null,"days_open":55,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":55},"description":"Be Part of Building the Future\nDremio is the unified lakehouse platform for self-service analytics and AI, serving hundreds of global enterprises, including Maersk, Amazon, Regeneron, NetApp, and S&P Global. Customers rely on Dremio for cloud, hybrid, and on-prem lakehouses to power their data mesh, data warehouse migration, data virtualization, and unified data access use cases. Based on open source technologies, including Apache Iceberg and Apache Arrow, Dremio provides an open lakehouse architecture enabling the fastest time to insight and platform flexibility at a fraction of the cost. Learn more at www.dremio.com.\nAbout the role\nDremio’s Query Execution team builds the runtime responsible for executing analytical queries at scale. The team sits between query planning and table scans, owning the systems that turn query plans into efficient, reliable execution.\nAs a Senior Staff Software Engineer, you’ll work on query operators, expression evaluation, memory management, execution scheduling, runtime planning, and performance optimization. Your work will directly affect query performance, scalability, and reliability across Dremio’s cloud data platform.\nWhat you’ll be doing\nBuild the execution engine: Design, implement, test, and support query operators, expression evaluation, execution scheduling, runtime planning, and resource management.\nImprove runtime performance: Optimize vectorized processing, concurrency, parallelism, memory usage, data exchange, and disk spilling.\nDiagnose difficult problems: Investigate query correctness and performance issues using query profiles, profiling tools, telemetry, benchmarks, logs, and production data.\nOptimize Java and the JVM: Improve CPU utilization, allocation behavior, garbage collection, thread behavior, and other runtime characteristics.\nCollaborate across the query engine: Work with Query Planner, Datalake, Product, Support, and field engineering teams on end-to-end query improvements.\nUse AI-assisted development tools: Apply AI tools to code comprehension, debugging, test generation, documentation, and incident analysis.\nApply engineering judgment: Validate AI-generated code and recommendations through review, testing, benchmarking, and engineering judgment.\nRaise the engineering bar: Participate in design and code reviews, contribute to technical direction, and mentor other engineers.\nWhat we’re looking for\nSoftware engineering experience: 5+ years developing production software, preferably in database systems, query execution, distributed systems, or related areas.\nProgramming skills: Strong Java skills; experience with C++ is a plus.\nComputer science fundamentals: Strong foundation in data structures, algorithms, concurrency, multithreaded programming, and asynchronous programming.\nDatabase and distributed systems knowledge: Understanding of database internals, query processing, distributed execution, and performance optimization.\nPerformance engineering experience: Experience profiling and optimizing CPU, memory, garbage collection, thread behavior, or other runtime characteristics.\nProblem-solving ability: Ability to solve ambiguous technical problems and work effectively across team boundaries.\nEngineering judgment: Ability to evaluate tradeoffs, validate solutions rigorously, and make sound decisions when working with unfamiliar or AI-assisted implementations.\nCommunication and ownership: Strong communication skills, a sense of ownership, and a commitment to delivering high-quality software.\nBonus points if you have\nQuery engines: Distributed query engines, database engines, or large-scale data processing systems.\nExecution techniques: Vectorized execution, query operators, expression evaluation, code generation, or runtime optimization.\nRuntime systems: JVM profiling, memory management, caching, networking, data exchange, execution scheduling, or disk spilling.\nData platforms: Apache Arrow, Apache Iceberg, Parquet, Avro, Spark, Hadoop, or cloud object stores.\nOpen source: Contributing to open-source projects.\nWhat we value \nAt Dremio, we hold ourselves to high standards when it comes to People, Thinking, and Action. Our Gnarlies (that's what we call our employees) communicate with clarity, drive accountability, and are respectful towards each other. We confront brutal facts and focus on results while operating with a sense of urgency and building a \"flywheel\". People who like to jump in and drive momentum will thrive in our #GnarlyLife.\nDremio is an equal opportunity employer supporting workforce diversity. We do not discriminate on the basis of race, religion, color, national origin, gender identity, sexual orientation, age, marital status, protected veteran status, disability status, or any other unlawful factor.\nDremio is committed to providing any necessary accommodations for individuals with disabilities within our application and interview process. To request accommodation due to a disability, please inform your recruiter.\nDremio has policies in place to protect the personal information that employees and applicants disclose to us. Please click hereto review the privacy notice. \nImportant Security Notice for Candidates\nAt Dremio, we uphold trust and transparency as paramount values in all our interactions with customers, partners, employees, and the general public. We have been targeted by individuals creating fake domains similar to ours to scam prospects and candidates. Please note that all official communications from us will be from an @dremio.com domain. If you suspect you've been targeted by a scam, it's imperative to report the incident to your local law enforcement agencies. For more information about this type of scam, please refer to Dremio's official statement here.\nDremio is not responsible for any fees related to unsolicited resumes and will not pay fees to any third-party agency or company that does not have a signed agreement with the Company.","description_format":"text","description_chars":5932,"description_truncated":false,"requirements":{"experience_years_min":5,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[{"name":"Portugal","iso":"PT","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Query Engines & Big Data Processing","Data Warehouses & Lakehouses"],"lifecycle":[{"event":"open","at":"2026-09-07T16:15:29Z"}],"visa":[],"liveness":{"score":46,"band":"ok","label":"Likely open","p_open":1,"p_active":0.843,"p_room":0.55,"age_days":55,"expected_fill_days":48,"reasons":["conf:2","win:tail"],"computed_at":"2026-11-01T06:10:25Z"},"pay":null,"html_url":"https://alion.io/job/dremio-senior-staff-software-engineer-query-execution","json_url":"https://alion.io/job/dremio-senior-staff-software-engineer-query-execution.json","meta":{"generated_at":"2026-11-01T22:45:23Z","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":34579,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-02T00:00:00Z"}},"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":58533},"rest":"https://alion.io/mcp/rest/get_company?id=58533"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fdremio-senior-staff-software-engineer-query-execution"},{"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%2Fdremio-senior-staff-software-engineer-query-execution"},{"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%2Fdremio-senior-staff-software-engineer-query-execution"},{"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/dremio-senior-staff-software-engineer-query-execution\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fdremio-senior-staff-software-engineer-query-execution"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":513071}},{"tool":"search_jobs","arguments":{"company":"dremio.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":513071},"note":"people open to offers who fit this vacancy"}],"note":"The same data through MCP tools: https://alion.io/mcp/open needs no sign-in (compact searches, postings, people); https://alion.io/mcp with an Alion account has everything. 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