{"id":150861,"url":"https://alion.io/job/smadex-junior-data-engineer-smadex-slu","title":"Junior Data Engineer - Smadex SLU","company":{"id":53829,"name":"Smadex","domain":"smadex.com","url":"https://alion.io/company/smadex","size_band":"201-500","is_staffing_agency":false,"employer_type":"direct","is_intermediary":false,"listed_via":null,"ats_vendor":"JazzHR","truth_index":null},"role":"Data Science","role_family":"Data Science","seniority":"junior","employment_type":null,"work_mode":"hybrid","remote_scope":null,"remote_scope_basis":null,"remote_working_hours":null,"hiring_geo_confidence":"structured","locations":["Barcelona, Spain"],"countries":["ES"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":null,"experience_years_min":1,"visa_sponsorship":true,"relocation_package":false,"has_equity":false,"technologies":[{"name":"Agile","optional":false},{"name":"Java","optional":false},{"name":"Machine Learning","optional":false},{"name":"Python","optional":false},{"name":"SQL","optional":false},{"name":"AWS","optional":true},{"name":"Docker","optional":true},{"name":"Git","optional":true},{"name":"Jenkins","optional":true},{"name":"Jira","optional":true},{"name":"Memcached","optional":true},{"name":"MySQL","optional":true},{"name":"Notion","optional":true},{"name":"Redis","optional":true},{"name":"Scala","optional":true},{"name":"Spark","optional":true}],"status":"live","first_seen_at":"2026-08-28T14:49:48Z","employer_posted_date":"2026-09-25","last_verified_at":"2026-10-17T07:44:35Z","board_verified":true,"closed_at":null,"days_open":49,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":49},"description":"Smadex is a cutting-edge ad-tech company: we process more than 4,5 million ad requests per second, replying under 100ms (for reference, the Google search engine handles ~76,000 QPS). Every day we generate several TBs of data that need to be processed, analyzed and aggregated, so our real-time components get smarter every day. We need you to help us keep our platform in motion! If you are ready to boost your professional career in the tech world, this is your opportunity.\nThe team\nYou will join our core engineering team, a collaborative group of experienced engineers responsible for enabling complex data to be available in the real-time bidding platform for the Machine Learningmodels to use. We foster a fast-paced, supportive environment where knowledge sharingis key. We value autonomyand will provide the platform for you to grow your career while solving complex engineering challenges.\nWhat are we looking for?\nWe're looking for an enthusiastic Junior Data Engineerwho is passionate about data pipelines and excited by extreme performance challenges. Your success will be measured by your ability to help build robust data pipelines, deliver high-quality features, and collaborate closely with the team while eagerly learning and applying your knowledge effectively.\nWhat will you do at Smadex?\nYou will dive into a dynamic environment, tackling short-cycle tasks such as implementing complex data ingestion services, following a \"you build it, you run it\" philosophy. You will be expected to participate in code reviews, contribute to technical and architectural decisions, and collaborate in a fast-paced environment where every opinion counts.\nKey Responsibilities\nFeature Ownership: Design, develop, and implement Data features for the Machine Learning models to use..\nQuality Assurance: Write clean, efficient, testable code and thoroughly test work locally and in a sophisticated staging environment.\nOperational Excellence: Monitor deployments and help ensure the stability, reliability and performance of production systems.\nAgile Collaboration: Collaborate with the team in an agile environment, participating in planning and reporting on progress.\nRequirements:\nA Bachelor's degree in Computer Science or a related technical field.\n1-2 years of experience in Software or Data engineering\nSQL Knowledge\nPython or Java knowledge.\nInterest in Big Data, Machine Learning and Data Engineering.\nExcellent communication skills in English (written and spoken)\nWhat Will Make You Stand Out (Bonus Points):\nScala knowledge\nExperience with Key-Value stores and in-memory databases (e.g. Redis, Memcached).\nFamiliarity with cloud environments, particularly AWS.\nExperience with Airflow workflows\nExperience in Big Data\nExperience with Spark\nOur Tech Stack\nLanguages:Python, Scala and bash.\nFrameworks: Spark\nDatabases:MySQL, Redis\nCloud & DevOps:AWS, Jenkins, Docker, Airflow\nTools:Git, Jira, Notion\nWhat We Offer\nJoin a highly motivated and talented team in a fun and friendly work environment.\nOpportunity to work in a complex environment and gain experience from it.\nDirectly add value to the business with the projects that you are assigned.\nGreat compensation package.\nTop location at the heart of Barcelona with a rooftop terrace, Barbeque, and a fully stocked fridge.\nGreat work-life balance: work from home (2 days per week) and flexible hours.\nProfessional development with a LinkedIn Learning subscription and other training opportunities.\nMeal vouchers - Ticket Restaurant monthly allowance.\nMonthly gym allowance: Choose between DiR and Wellhub\nMonthly TGIF (Thank God It’s Friday) events and regular team-building activities.\nPing-pong table and arcade machine.\nAnd more!\nIf you want to know more about us visit our websiteSmadex.com, and for a sneak peek of the cool stuff we build check this video out! And, if you are ready to take your career to the next level and tackle engineering challenges at a global scale, we encourage you to apply!\nPlease note that we do NOT provide VISA sponsorship. Candidates without a legal permit to work in Spain won't be considered.","description_format":"text","description_chars":4093,"description_truncated":false,"requirements":{"experience_years_min":1,"management_years_min":null,"team_size_min":null,"manages_managers":false,"education":{"level":"bachelor","optional":false},"security_clearance":false,"languages":[{"language":"English","level":"All levels","optional":false}]},"benefits":["Professional development"],"hiring_locations":[{"name":"Spain","iso":"ES","kind":"country"}],"hiring_excludes":[],"relocation_offered":false,"industries":["Advertising","Digital Marketing"],"lifecycle":[{"event":"open","at":"2026-08-28T14:49:48Z"}],"visa":[],"liveness":{"score":11,"band":"cold","label":"Long shot","p_open":1,"p_active":0.377,"p_room":0.28,"age_days":49,"expected_fill_days":18,"reasons":["conf:2","win:tail","crowd:junior"],"computed_at":"2026-10-17T05:46:00Z"},"pay":null,"html_url":"https://alion.io/job/smadex-junior-data-engineer-smadex-slu","json_url":"https://alion.io/job/smadex-junior-data-engineer-smadex-slu.json","meta":{"generated_at":"2026-10-17T10:50:59Z","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":14227,"day_limit":null,"remaining_today":null,"minute_limit":300,"resets_at":"2026-10-18T00:00:00Z"}},"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":53829},"rest":"https://alion.io/mcp/rest/get_company?id=53829"},"human":"https://alion.io/catalog?offer=company.slices&for=job%2Fsmadex-junior-data-engineer-smadex-slu"},{"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%2Fsmadex-junior-data-engineer-smadex-slu"},{"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%2Fsmadex-junior-data-engineer-smadex-slu"},{"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/smadex-junior-data-engineer-smadex-slu\", \"note\": \"what you need it for\"}"},"human":"https://alion.io/catalog?offer=company.verify&for=job%2Fsmadex-junior-data-engineer-smadex-slu"}]}