{"id":762789,"url":"https://alion.io/job/theopentag-data-engineer","title":"Data Engineer","company":{"id":679565,"name":"OpenTag","domain":"theopentag.com","url":"https://alion.io/company/theopentag","size_band":null,"is_staffing_agency":false,"is_intermediary":false,"ats_vendor":"Recruitee","truth_index":null},"role":"Data Science","role_family":"Data Science","seniority":null,"employment_type":null,"work_mode":"on_site","remote_scope":null,"hiring_geo_confidence":"structured","locations":["Sofia, Bulgaria"],"countries":["BG"],"hiring_countries":[],"hiring_countries_total":0,"salary":null,"salary_estimate":{"min_usd":26000,"max_usd":72000,"period":"year","method":null,"sample_n":2817},"experience_years_min":null,"visa_sponsorship":false,"relocation_package":false,"has_equity":false,"technologies":[{"name":"ETL/ELT","optional":false},{"name":"Go","optional":false},{"name":"Java","optional":false},{"name":"PostgreSQL","optional":false},{"name":"Spring Boot","optional":false},{"name":"SQL","optional":false},{"name":"Apache Kafka","optional":true},{"name":"CI/CD","optional":true},{"name":"GitLab CI","optional":true},{"name":"Python","optional":true},{"name":"Spark","optional":true}],"status":"live","first_seen_at":"2026-08-04T14:05:06Z","employer_posted_date":"2026-08-04","last_verified_at":"2026-09-24T09:15:05Z","board_verified":true,"closed_at":null,"days_open":50,"trust":{"level":"ok","repost_count":null,"flags":[],"days_open":50},"description":"OpenTag is a well-funded international company within the field of Sports Betting and iGaming.\nOur mission is to create the best software through empowered teams, centralized around our product. We do this to help great organizations reach ambitious goals and fulfill their purpose with equally great teams.\nOur platform is built in Golang and Java (Spring Boot), with a modern data ecosystem that powers analytics and business intelligence across our products. We take pride in innovation, engineering excellence, and continuous improvement.\nWe're looking for a MiddleData Engineer to join our R&D team and help build, optimize, and maintain our data platform. You'll work closely with internal stakeholders and B2B clients to deliver ad-hoc data solutions, develop and improve ETL pipelines, and ensure reliable, high-quality data for business needs.\nRequirements\nRequirements:\nGood understanding of relational database logic. I.e. differences between CAP and ACID, types of relations between tables, isolation levels etc.\n\nHands-on experience with PostgreSQL.\n\nProficiency in query authoring (SQL).\n\nWorking knowledge of procedures and functions.\n\nExperience with performance and tuning of SQL queries.\n\nGood understanding of de-normalized/normalized data.\n\nSolid understanding of ETL logic.\n\nGood understanding of DWH principles and DWH performance optimization.\n\nNice to have technical qualifications:\nExperience with Python\n\nExperience with NoSQL databases.\n\nExperience with data tools: DBT.\n\nBasic experience with stream-processing systems: Kafka, Storm, Spark-Streaming, etc.\n\nBasic experience with GitLab CI/CD pipelines\n\nDay-to-day responsibilities:\nBuild and maintain reliable, well-structured data pipelines.\n\nAssemble large, complex data sets that meet functional / non-functional business requirements.\n\nContribute to internal process improvements: automating manual processes, optimizing data delivery, and improving scalability.\n\nBuild the components required for optimal extraction, transformation, and loading of data from a wide variety of data sources using SQL and BI technologies.\n\nSupport the development of analytics tools that utilize the data pipeline to provide actionable insights into customer acquisition, operational efficiency and other key business performance metrics.\n\nCreate data tools for analysts and data scientists that will assist them in building andoptimizing our product into an innovative industry leader.\n\nWhat do We offer?\nAn inspiring workspace with awesome teammates and a great vibe\n\nLearning opportunities with a dedicated training budget to level up your skills\n\n25 vacation days + an extra day off to celebrate your birthday\n\nPremium health insurance for your peace of mind\n\nBirthday vouchers and little surprises along the way\n\nFree snacks, team lunches, and great coffee (because fuel matters )\n\nSports card, transportation, and food allowance\n\nQuarterly team events that bring everyone together\n\nExcited to join us? Click the Applybutton and let’s build something amazing together!","description_format":"text","description_chars":3037,"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":["Health insurance"],"hiring_locations":[],"hiring_excludes":[],"relocation_offered":false,"industries":["Sports","Sports Betting","iGaming & Gambling"],"lifecycle":[{"event":"open","at":"2026-09-11T18:59:37Z"}],"liveness":{"score":14,"band":"cold","label":"Long shot","p_open":1,"p_active":0.39,"p_room":0.35,"age_days":50,"expected_fill_days":20,"reasons":["conf:10","win:tail"],"computed_at":"2026-09-24T05:45:00Z"},"pay":null,"html_url":"https://alion.io/job/theopentag-data-engineer","json_url":"https://alion.io/job/theopentag-data-engineer.json","meta":{"generated_at":"2026-09-24T09:51:29Z","cache_seconds":300,"methodology":"https://alion.io/methodology","terms":"https://alion.io/terms","contact":"https://alion.io/contact","api":"https://alion.io/developers"}}