{"id":1730817,"url":"https://alion.io/job/b3group-python-data-engineer","title":"Python / Data Engineer","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":"senior","employment_type":"full_time","work_mode":"on_site","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Warsaw, Poland"],"countries":["PL"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":61000,"max_usd":100000,"period":"year","method":"role_seniority_country_remote_cell","sample_n":107},"experience_years_min":5,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Pandas","optional":false},{"name":"PostgreSQL","optional":false},{"name":"pySpark","optional":false},{"name":"Python","optional":false},{"name":"SQL","optional":false},{"name":"Spark","optional":true}],"status":"live","first_seen_at":"2026-09-07T09:12:35Z","employer_posted_date":"2026-09-07","last_verified_at":"2026-10-18T09:29:20Z","board_verified":true,"closed_at":null,"days_open":41,"trust":{"level":"ok","repost_count":0,"flags":["company_stale"],"days_open":40},"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 Python / Data Engineer Join a project in the fin-tech sector, building high-performance Python and PostgreSQL backends from scratch to process massive financial databases. Grow in an environment that cares about your development as much as you do.\nYour responsibilities\nDesigning, developing, and maintaining application backends responsible for presenting financial data.\n\nCollaborating on the development of internal Python libraries focused on efficient data processing and analysis.\n\nCreating and maintaining unit tests and integration tests to ensure data integrity and code quality.\n\nIdentifying performance bottlenecks and proposing improvements to increase data flow efficiency, query speed, and data accuracy.\n\nRequirements\nAt least 5 years of commercial experience in Python backend development for data-intensive applications.\n\nStrong experience with relational databases, writing optimized SQL queries, and deep understanding of PostgreSQL internals\n\nExperience with PySpark and Pandas for large-scale data processing\n\nMethodical problem-solving skills with a focus on transactional consistency and concurrency/multithreading.\n\nHigher degree in STEM or Computer Science.\n\nHigh-level English proficiency for daily collaboration with remote teams\n\nWhat we offer\nWork in a Scandinavian culture built on logic and dialogue.\n\nHealth and sports benefits tailored to your needs.\n\nSpeed Coaching - short sessions that provide new perspectives and solutions.\n\nSports training, an internal team, and opportunities to take part in competitions.\n\nTeam events and development-focused meetups.\n\nApply today!","description_format":"text","description_chars":2291,"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":[{"language":"English","level":"Advanced (C1)","optional":false}]},"benefits":[],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["IT Consulting & Digital Transformation"],"lifecycle":[{"event":"open","at":"2026-10-03T00:04:34Z"}],"visa":[],"liveness":{"score":25,"band":"fade","label":"Fading","p_open":1,"p_active":0.447,"p_room":0.55,"age_days":39,"expected_fill_days":31,"reasons":["conf:0","stale_co","velocity","win:tail"],"computed_at":"2026-10-17T05:46:00Z"},"pay":null,"html_url":"https://alion.io/job/b3group-python-data-engineer","json_url":"https://alion.io/job/b3group-python-data-engineer.json","meta":{"generated_at":"2026-10-18T09:30:35Z","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":14086,"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%2Fb3group-python-data-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%2Fb3group-python-data-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%2Fb3group-python-data-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/b3group-python-data-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fb3group-python-data-engineer"}]}