Data Engineer

• Designing and maintaining scalable, multi-tenant data pipelines
• Ensuring data quality, reliability, and governance
• Collaborating with Product, Engineering, and Data Science teams

• Languages & Frameworks: Python is our core for pipelines, APIs, and CLI tooling. We use FastAPI and Pydantic to serve typed, high-performance REST APIs to our platform.
• Data Transformation & Modeling: We use dbt for our SQL-based transformation layer and SQLModel with Alembic for ORM-based schema management and versioned migrations.
• Storage & Analytics: We utilize DuckDB and DuckLake as our embedded analytics engine, all hosted on a robust AWS infrastructure (S3, IAM).
• Orchestration & Workflow: Apache Airflow handles our complex event-driven and scheduled job flows.
• Quality & Engineering Excellence: We prioritize reliability through pytest for QA validations, GitHub for version control, and a rigorous PR-based code review process.

• Build and maintain data pipelines and ETL processes for specific datasets or use cases, following existing patterns and guidance.
• Implement and improve data quality checks, monitoring and alerting for assigned datasets.
• Collaborate with Data Scientists and ML Engineers to make data available and usable for model development.
• Deliver assigned data tasks on time with autonomy, showing accountability and a strong “doer” mindset.
• Learn to work with Aily's data stack (warehouse, streaming, orchestration, catalog).

• All of the above +
• Design and implement end-to-end data pipelines (ingestion → transformation → quality → delivery) for multiple use cases with growing autonomy.
• Build and maintain data infrastructure components (streaming pipelines, transformations, APIs, catalogs) using modern data tools.
• Implement robust data quality frameworks, monitoring, and alerting systems at scale.
• Optimize data workflows for cost, performance and reliability across multiple datasets.
• Mentor junior team members on data engineering best practices and tooling.

• All of the above, plus:
• Lead the design and implementation of complex, scalable data platforms and pipelines that support multiple teams and use cases.
• Drive improvements in data infrastructure, tooling and processes that reduce operational burden and improve data team efficiency.
• Own critical data systems end-to-end, from requirements to production monitoring, with only strategic guidance.
• Establish and enforce data engineering standards (quality, governance, reliability, performance) across the organization.
• Collaborate with ML Engineering, Data Science and Product teams to design data architecture that powers AI at scale.
  Principal Data Practitioner – 8+ years of experience

• All of the above +
• Act as technical authority for the Data Platform, deeply understanding Aily's data architecture and shaping long-term data strategy across teams
• Lead cross-team data architecture discussions and technical design sessions, ensuring scalable, future-proof solutions
• Define and maintain org-wide data standards (quality, governance, reliability, performance, security) and drive adoption across all teams
• Own multiple critical data initiatives simultaneously, managing complexity, external stakeholders, and leadership expectations
• Solve org-critical data challenges and represent data engineering standards as the ultimate quality gatekeeper

• Data Engineers who excel at building reliable, scalable data infrastructure that powers AI decision-making at enterprise scale.
• Hands-on builders who love creating robust data pipelines, optimizing systems for performance and cost, and ensuring data quality at every step.
• Strong collaborators who partner with Data Scientists, ML Engineers, Product teams, and business stakeholders to turn raw data into actionable insights.
• Startup mindset: thrives in ambiguity, proactively solves complex data challenges, and improves tooling beyond your immediate scope.
• Ready to Lead Boldly – building the data foundation that enables Aily's AI platform to deliver millions of real-time insights daily
  
  Location & details
  Locations: Cluj 
  Contract type: Permanent.
  Work policy: hybrid (1-2 days per week in the office)

Benefits

• Medical insurance – Because your health and that of your family is our top priority. You’re covered!
• Holiday flat in Valencia – Dreaming of sunny days in Spain? Our company flat is ready for your next getaway.
• Gifts for special occasions – We love celebrating you! Expect thoughtful surprises on Easter, Women’s Day, Father’s Day, and more.
• Anniversary gifts – Each work anniversary is a milestone worth celebrating, and we’ll continue to mark every year you spend with us with a special gift.
• Team-building events – We value connection beyond work, offering engaging team experiences in great locations to inspire collaboration and fun.
• End of the year celebrations – We wrap up each year with a special celebration, filled with joy, laughter, and unforgettable moments.
• Day off on your birthday – Your special day is yours to enjoy, no work required!
• Monthly massage day – Treat yourself to a relaxing massage at the office once a month.
• Monthly themed lunch – Delicious food and great company – let’s keep sharing laughs and stories around the table each month.
• Community and social initiatives – We bring people together through activities like Bring Kids to the Office Day, donation drives, tree planting, sporting events, decorating the Christmas tree with your colleagues, celebrating new office openings, Principal33’s anniversary, Exchange Office, and more!
• Access to Udemy Learning Platform – We know growth matters, so you now have unlimited access to thousands of courses on Udemy. Develop your skills, anytime, anywhere!
• German Language Courses – We offer dedicated language courses to help you develop your German skills, supporting both personal and professional growth.
• SAP Courses – We’re preparing to launch specialized SAP training sessions to support your professional development and boost your expertise in this valuable field.
• Personal & Professional Growth – We support your development through masterclasses with experienced trainers and are open to investing in courses and training that help you grow.