{"id":2719531,"url":"https://alion.io/job/b3-consulting-group-data-lakehouse-developer","title":"Data Lakehouse Developer","company":{"id":21061,"name":"B3 Consulting Group","domain":"b3.se","url":"https://alion.io/company/b3group","size_band":null,"is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"Teamtailor","truth_index":{"grade":"C","score":60,"open_postings":44,"ghost_share":0.659,"stale_share":0,"repost_share":0,"time_to_fill_p50_days":31,"computed_at":"2026-10-17T05:46:00Z"}},"role":"Data Science","role_family":"Data Science","seniority":"middle","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Wrocław, Poland"],"countries":["PL"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":46000,"max_usd":81000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":25},"experience_years_min":4,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Agile","optional":false},{"name":"Apache Hudi","optional":false},{"name":"Apache Iceberg","optional":false},{"name":"CI/CD","optional":false},{"name":"Delta Lake","optional":false},{"name":"Docker","optional":false},{"name":"Dynatrace","optional":false},{"name":"Grafana","optional":false},{"name":"Jenkins","optional":false},{"name":"Kanban","optional":false},{"name":"Kubernetes","optional":false},{"name":"Prometheus","optional":false},{"name":"pySpark","optional":false},{"name":"Python","optional":false},{"name":"Scrum","optional":false},{"name":"SLI/SLO/SLA","optional":false},{"name":"Spark","optional":false},{"name":"SQL","optional":false}],"status":"live","first_seen_at":"2026-10-14T12:48:21Z","employer_posted_date":"2026-10-14","last_verified_at":"2026-10-17T21:18:07Z","board_verified":true,"closed_at":null,"days_open":3,"trust":{"level":"ok","repost_count":0,"flags":["company_stale"],"days_open":2},"description":"We are part of an international organization listed on Nasdaq Stockholm, operating in 11 countries. In Poland, we work with full autonomy. We independently choose our technologies, processes, and ways of working while maintaining the highest professional standards.\nWe deliver a wide range of IT projects in Poland and internationally, across multiple domains and technologies. This allows our consultants to develop their competencies and gain experience aligned with their professional ambitions.\nOur collaboration is built around the CARE philosophy. For us, it means responsible project matching, transparent cooperation, and a long-term approach to professional growth.\nJoin us as Data Lakehouse Developer. The project focuses on building and maintaining a scalable Data Lakehouse architecture-using Apache Iceberg, Delta Lake, or Apache Hudi-to process data across the entire pipeline, from raw lake ingestion to refined presentation layers\nGrow in an environment that cares about your development as much as you do.\nYour responsibilities\nData Lakehouse & Architecture: Design and maintain versioned data layers (Bronze, Silver, Gold) using Apache Iceberg, Delta Lake, or Apache Hudi, including CI/CD for schema evolution.\n\nSpark & MongoDB Integration: Build PySpark/Spark-SQL pipelines for data reconciliation between MongoDB and source systems, optimizing reads using partitioning and match push-down.\n\nPerformance & Cost Tuning: Optimize Spark jobs (AQE, caching, broadcast joins) to lower latency and minimize Data Lakehouse processing costs.\n\nQuality, Monitoring & SLAs: Implement automated data quality checks, SLA/SLO tracking, and distributed monitoring for batch/streaming pipelines using Prometheus, Grafana, and Dynatrace.\n\nKubernetes & Automation: Automate Spark application deployments on Kubernetes using Docker, Spark Operator, and CI/CD pipelines.\n\nDelivery & Collaboration: Diagnose data discrepancies, maintain technical runbooks, conduct code reviews, and collaborate in Agile teams (Scrum/Kanban).\n\nRequirements\n4+ years of hands-on production experience in data engineering.\n\nStrong proficiency in Python, PySpark, Spark-SQL, DataFrames, and Structured Streaming.\n\nProven experience with MongoDB (Spark Connector, indexing) and Apache Iceberg (table versioning, upserts/merges).\n\nHands-on background in CI/CD automation (Jenkins) and containerized deployments on Kubernetes.\n\nYou need to live in Poland and/or be eligible to work here.\n\nWhat we offer\nWork in a Scandinavian culture built on logic and dialogue.\nHealth and sports benefits tailored to your needs.\nSpeed Coaching - short sessions that provide new perspectives and solutions.\nSports training, an internal team, and opportunities to take part in competitions.\nTeam events and development-focused meetups.\nApply today!","description_format":"text","description_chars":2806,"description_truncated":false,"requirements":{"experience_years_min":4,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":null,"security_clearance":false,"languages":[]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["IT Consulting & Digital Transformation","Management Consulting","Custom Software Development"],"lifecycle":[{"event":"open","at":"2026-10-16T14:33:48Z"}],"visa":[],"liveness":{"score":63,"band":"ok","label":"Likely open","p_open":1,"p_active":0.632,"p_room":1,"age_days":2,"expected_fill_days":31,"reasons":["conf:0","stale_co","velocity","win:early"],"computed_at":"2026-10-17T05:46:00Z"},"pay":null,"html_url":"https://alion.io/job/b3-consulting-group-data-lakehouse-developer","json_url":"https://alion.io/job/b3-consulting-group-data-lakehouse-developer.json","meta":{"generated_at":"2026-10-18T00:15:58Z","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":441,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-19T00:00:00Z"}},"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":21061},"rest":"https://alion.io/mcp/rest/get_company?id=21061"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fb3-consulting-group-data-lakehouse-developer"},{"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%2Fb3-consulting-group-data-lakehouse-developer"},{"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%2Fb3-consulting-group-data-lakehouse-developer"},{"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/b3-consulting-group-data-lakehouse-developer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fb3-consulting-group-data-lakehouse-developer"}]}