{"id":2603439,"url":"https://alion.io/job/callista-senior-etl-data-warehouse-engineer","title":"Senior ETL / Data Warehouse Engineer","company":{"id":693135,"name":"Callista","domain":"callista.ch","url":"https://alion.io/company/callista-3","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Recruitee","truth_index":null},"role":"Data Science","role_family":"Data Science","seniority":"senior","employment_type":"freelance","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Bern, Switzerland"],"countries":["CH"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":83000,"max_usd":214000,"period":"year","method":"global_role_cell_scaled_by_country","sample_n":2324},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"ETL/ELT","optional":false},{"name":"SQL","optional":false}],"status":"live","first_seen_at":"2026-10-15T07:45:02Z","employer_posted_date":"2026-10-15","last_verified_at":"2026-10-19T21:56:08Z","board_verified":true,"closed_at":null,"days_open":4,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":4},"description":"Für die Weiterentwicklung einer etablierten Data-Warehouse-Plattform suchen wir einen erfahrenen Senior ETL / Data Warehouse Engineer mit fundierten Kenntnissen in Oracle-basierten Data-Warehouse-Lösungen.\nIn dieser Rolle bist du verantwortlich für die Entwicklung, Optimierung und Qualitätssicherung bestehender ETL-Prozesse. Du arbeitest entlang definierter Architektur- und Modellierungsvorgaben und sorgst für stabile, performante und nachhaltige Datenintegrationslösungen.\nAufgaben:\nEntwicklung, Weiterentwicklung und Optimierung von ETL-Strecken innerhalb einer bestehenden Data-Warehouse-Architektur\n\nUmsetzung technischer Anforderungen unter Berücksichtigung bestehender Architektur- und Modellierungsvorgaben\n\nSicherstellung einer hohen Datenqualität, Stabilität und Performance\n\nAnalyse und Optimierung komplexer SQL-Abfragen und Datenmodelle\n\nUmsetzung von Datenintegrations- und Historisierungskonzepten\n\nUnterstützung des produktiven Betriebs sowie kontinuierliche Verbesserung der Betriebs- und Supportprozesse\n\nEnge Zusammenarbeit mit Business Analysten, Architekten und Fachbereichen\n\nRequirements\nAnforderungen:\nMehrjährige Berufserfahrung als ETL- oder Data-Warehouse-Entwickler\n\nHervorragende SQL-Kenntnisse und Erfahrung mit komplexen Datenmodellen\n\nSehr gute Kenntnisse von Oracle-Datenbanken und Oracle-basierten Data-Warehouse-Lösungen\n\nFundierte Erfahrung in Datenintegration, Historisierung, Datenqualität und Performance-Optimierung\n\nGute Kenntnisse von Betriebs- und Supportprozessen\n\nSelbstständige, strukturierte und qualitätsorientierte Arbeitsweise\n\nBereitschaft, Verantwortung für den produktiven Betrieb und die nachhaltige Weiterentwicklung der Plattform zu übernehmen\n\nErfahrung im Banking oder in der Finanzbranche ist von Vorteil\n\nGenerelle Rahmenbedingungen:\nStart: Januar 2027\n\nDauer: 6 Monate (Verlängerung möglich)\n\nPensum: 100%\n\nArbeitsort: Bern","description_format":"text","description_chars":1887,"description_truncated":false,"requirements":{"experience_years_min":null,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[{"language":"German","level":"Advanced (C1)","optional":false}]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["AI Consulting & Integration","Data Engineering & Migration Services"],"lifecycle":[{"event":"open","at":"2026-10-15T08:49:41Z"}],"visa":[],"liveness":{"score":80,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.848,"p_room":0.945,"age_days":3,"expected_fill_days":11,"reasons":["conf:3","velocity","win:mid"],"computed_at":"2026-10-19T05:45:15Z"},"pay":null,"html_url":"https://alion.io/job/callista-senior-etl-data-warehouse-engineer","json_url":"https://alion.io/job/callista-senior-etl-data-warehouse-engineer.json","meta":{"generated_at":"2026-10-20T01:34:19Z","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":1976,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-21T00:00:00Z"}},"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":693135},"rest":"https://alion.io/mcp/rest/get_company?id=693135"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fcallista-senior-etl-data-warehouse-engineer"},{"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%2Fcallista-senior-etl-data-warehouse-engineer"},{"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%2Fcallista-senior-etl-data-warehouse-engineer"},{"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/callista-senior-etl-data-warehouse-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fcallista-senior-etl-data-warehouse-engineer"}]}