{"id":4148032,"url":"https://alion.io/job/dremio-staff-software-engineer-query-planner-reflections","title":"Staff Software Engineer - Query Planner & Reflections","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":null,"experience_years_min":8,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Apache Iceberg","optional":false},{"name":"C++","optional":false},{"name":"Java","optional":false},{"name":"SQL","optional":false},{"name":"Amazon S3","optional":true},{"name":"AWS","optional":true},{"name":"Azure","optional":true},{"name":"GCP","optional":true}],"status":"live","first_seen_at":"2026-11-12T06:52:23Z","employer_posted_date":"2026-11-12","last_verified_at":"2026-11-12T08:02:41Z","board_verified":true,"closed_at":null,"days_open":0,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":0},"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 Planner & Reflections (QPR) team owns the SQL planner and optimizer - built on Apache Calcite - and the reflections substitution engine that transparently rewrites queries to hit pre-computed materializations instead of raw source data. As a Staff Software Engineer, you'll set technical direction for this system: driving ambiguous, cross-team initiatives, raising the bar through design and code review, and helping other engineers.\nWhat you'll be doing\nSet architecture and technical direction for the Query Planner and Reflections team spanning next-generation features across OSS, Enterprise, and Cloud editions.\nOwn design, implementation, and delivery of complex initiatives that cross team boundaries (Query Execution, Catalog, Datalake).\nWork deeply with Apache Calcite and Apache Iceberg, including driving contributions upstream where it benefits Dremio.\nDiagnose the hardest correctness and performance issues in query planning and reflection matching using query profiles, telemetry, and production data.\nUse AI-assisted development tools for code comprehension, debugging, test generation, documentation, and incident analysis, and apply engineering judgment to validate AI-generated code through review, testing, and benchmarking.\nDesign architectures that run correctly across deployment models and public clouds.\nParticipate in design and code reviews and set technical standards for the team.\nPartner with Product on multi-quarter roadmap decisions and with Support and field teams on the highest-impact customer issues.\nWhat we're looking for\nB.S./M.S/Equivalent in Computer Science or a related technical field or equivalent experience\n8-10+ years of experience developing production-level software.\nFluency in Java/C++ is a plus.\nDeep understanding of query planning and optimization: cost-based optimizers, rule-based rewriting, ideally hands-on with Apache Calcite or a similar framework.\nStrong database fundamentals: SQL, performance, schema design.\nTrack record of driving system-level architecture decisions and leading complex, cross-team initiatives.\nSetting technical direction for the team or major component.\nAbility to evaluate tradeoffs and make sound decisions when working with unfamiliar or AI-assisted implementations.\nAbility to navigate ambiguous, cross-org problems independently; strong communication skills.\nUnderstanding of distributed file systems such as S3, ADLS, or HDFS; AWS, Azure, or GCP experience is a plus.\nBonus points if you have\nExperience with distributed query engines.\nHands-on experience in query processing or optimization, materialized view matching, distributed systems, concurrency control, code generation, Apache Arrow, caching, or disk spilling.\nContributions to Apache Calcite, Apache Iceberg, or similar open-source planner 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":5352,"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":[],"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":"2026-11-12T08:02:41Z"}],"visa":[],"liveness":{"score":86,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.86,"p_room":1,"age_days":0,"expected_fill_days":36,"reasons":["conf:1","win:early"],"computed_at":"2026-11-12T09:50:45Z"},"pay":null,"html_url":"https://alion.io/job/dremio-staff-software-engineer-query-planner-reflections","json_url":"https://alion.io/job/dremio-staff-software-engineer-query-planner-reflections.json","meta":{"generated_at":"2026-11-12T09:50:45Z","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":19974,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-11-13T00:00:00Z"}},"offers":[{"id":"company.slices","title":"One company in depth, by slice","status":"live","price":{"credits":0.1,"usd":0.01,"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-staff-software-engineer-query-planner-reflections"},{"id":"market.stats","title":"A market slice: pay, demand and time to fill","status":"live","price":{"credits":2,"usd":0.2},"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-staff-software-engineer-query-planner-reflections"},{"id":"job.search","title":"Open jobs by role, technology, place, pay and visa","status":"live","price":{"credits":0.1,"usd":0.01},"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-staff-software-engineer-query-planner-reflections"},{"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-staff-software-engineer-query-planner-reflections\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fdremio-staff-software-engineer-query-planner-reflections"}],"agent":{"mcp":"https://alion.io/mcp/jobs","mcp_open":"https://alion.io/mcp/open","next":[{"tool":"get_job","arguments":{"id":4148032}},{"tool":"search_jobs","arguments":{"company":"dremio.com","detail":"compact"}},{"tool":"match_people","arguments":{"job_id":4148032},"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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