{"id":3148759,"url":"https://alion.io/job/4soft-senior-data-engineer","title":"Senior Data Engineer","company":{"id":4465305,"name":"4soft","domain":"4soft.co","url":"https://alion.io/company/4soft-2","size_band":"11-50","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":null,"truth_index":null},"role":"Data Science","role_family":"Data Science","seniority":"senior","employment_type":"contractor","work_mode":"remote","remote_scope":"stated_countries","remote_scope_basis":"board_field","remote_working_hours":null,"hiring_geo_confidence":"inferred","locations":["Wrocław, Poland","Warsaw, Poland","Kraków, Poland"],"countries":["PL"],"hiring_countries":["PL"],"hiring_countries_total":1,"salary":{"min":25000,"max":35000,"currency":"PLN","period":"month","gross":null,"usd_annual":107628},"salary_estimate":null,"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"AWS","optional":false},{"name":"CloudFormation","optional":false},{"name":"Docker","optional":false},{"name":"GCP","optional":false},{"name":"Kubernetes","optional":false},{"name":"Terraform","optional":false},{"name":"Databricks","optional":true},{"name":"Scala","optional":true}],"status":"live","first_seen_at":"2026-10-22T08:00:13Z","employer_posted_date":null,"last_verified_at":"2026-10-22T08:00:13Z","board_verified":false,"closed_at":null,"days_open":2,"trust":{"level":"not_scored","repost_count":null,"flags":[],"days_open":2},"description":"We've been building digital products for over 10 years, with a strong focus on Blockchain-based applications. At 4soft, people come first - it's our team of passionate technologists that enables us to work with international clients and deliver innovative solutions. We believe in transparency, effective teamwork, and achieving real business outcomes for those we serve.\n\nWant to work on data infrastructure that powers cutting-edge crypto intelligence products? Growth and a great team culture matter to you? 4soft is the perfect place to find both.\n\nJoin our client's data engineering team - a global leader in blockchain analytics - and help drive the technical direction of a data platform that sits at the heart of everything they do. As a Senior Data Engineer, you'll architect systems that process massive blockchain and off-chain datasets, mentor engineers around you, and shape decisions that matter. If you're genuinely excited about large-scale distributed systems and want real ownership over critical infrastructure, this is your place.\n\nTech environment: Scala, Spark, Databricks, AWS, Airflow, Kubernetes, Terraform, Functional Programming\n\nAs a Senior Data Engineer, you will be responsible for:\nArchitecting, designing, and implementing large-scale distributed data systems and pipelines that serve as the backbone of all products\n\nDriving technical decision-making across batch and streaming data solutions, balancing scalability, performance, and long-term maintainability\n\nExploring and integrating new technologies - data orchestration tools, cloud-native solutions - to continuously optimise performance and scalability\n\nContributing to platform-wide initiatives that improve reliability, observability, and cost efficiency across the entire data infrastructure\n\nTaking shared ownership of data systems from design through deployment and ongoing support, ensuring they meet the growing demands of blockchain analysis\n\nCollaborating with engineers, product managers, data scientists, and intelligence analysts to build customer-focused features and scalable architectures\n\nMentoring engineers, performing thoughtful peer reviews, and championing best practices that raise the quality bar across the team\n\nWhat we expect from you:\nProven ability to design, build, and maintain distributed data systems in a cloud-based environment\n\nHands-on experience with big data frameworks such as Spark or Databricks\n\nStrong experience with Scala\n\nSolid knowledge of cloud infrastructure - AWS, GCP, or Azure\n\nStrong software engineering fundamentals: you write clean, testable, and efficient code, think about maintainability, and know what it means to build something others will depend on for years\n\nThe judgement to navigate trade-offs between scalability, performance, resilience, and cost - and to communicate those decisions clearly to technical and non-technical stakeholders\n\nExperience or genuine interest in functional programming, data modelling, workflow orchestration, or AI-driven tools\n\nA learning mindset, visible in how you talk about your work: what you've built recently, what you'd do differently, and what drew you to data engineering in the first place\n\nEnglish proficiency at C1 level or above (for international client collaboration)\n\nPolish language skills at B2 level or above (for smooth communication with the team)\n\nGreat if you also bring:\nExperience in stream processing frameworks and event‑driven architecture\n\nHands‑on experience with Infrastructure as Code (Terraform, CloudFormation)\n\nExperience working in containerised environments (Docker, Kubernetes)\n\nInterest in crypto and blockchain technologies\n\nWhat helps us stay balanced:\nGrow your skills and hobbies with us - make use of a dedicated training and wellbeing budget\n\nWork from home or the office - your choice, up to 100% remote\n\nAccess to specialists whenever you need them via our LuxMed healthcare package\n\nIf the gym is your second home, activate a Multisport card with us\n\nLooking for a long-term home? You're in the right place - stable collaboration, no dress code, no heavy atmosphere\n\nOur team knows how to have fun: board games, city outings, go-kart races, laser tag, great food on team retreats - we take integration seriously (in the best way :)\n\nTech stack\nAWS\nSpark\nKubernetes\nDatabricks\nScala","description_format":"text","description_chars":4314,"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":[]},"benefits":[],"hiring_locations":[{"name":"Poland","iso":"PL","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Blockchain & Crypto"],"lifecycle":[{"event":"open","at":"2026-10-23T11:25:00Z"}],"visa":[],"liveness":{"score":85,"band":"hot","label":"Hiring now","p_open":1,"p_active":0.903,"p_room":0.945,"age_days":2,"expected_fill_days":7,"reasons":["seen:2","velocity","win:mid"],"computed_at":"2026-10-25T05:49:26Z"},"pay":{"stated_usd_annual":107628,"is_top_pay":false},"html_url":"https://alion.io/job/4soft-senior-data-engineer","json_url":"https://alion.io/job/4soft-senior-data-engineer.json","meta":{"generated_at":"2026-10-25T06:59:17Z","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":9843,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-26T00:00:00Z"}},"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":4465305},"rest":"https://alion.io/mcp/rest/get_company?id=4465305"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2F4soft-senior-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%2F4soft-senior-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%2F4soft-senior-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/4soft-senior-data-engineer\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2F4soft-senior-data-engineer"}]}