Sebastian Stjerne

Sebastian Stjerne

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Senior Data Engineer at Strategic Staffing Solutions
Tandil, Buenos Aires Province, Argentina
Contact Sebastian regarding: 
Flexible work
Starting at USD30/hour
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Timeline

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Résumé

Jobs verified_user 0% verified
  • Strategic Staffing Solutions
    Senior Data Engineer
    Strategic Staffing Solutions
    Jan 2025 - Current (1 year 10 months)
    - Architected end-to-end Databricks pipelines via Azure Data Factory, processing large volumes of unstructured and semi-structured data in Parquet and Delta Lake formats across Azure Data Lake and Blob Storage.
    - Built PySpark transformation workflows in Databricks notebooks to clean, transform, and prepare datasets for analytics and reporting.
    - Maintained Delta Lake tables under Unity Catalog governance, applying optimization and compaction to improve analytical workload performance.
    - Implemented data validation and quality checks during ingestion to improve reliability of analytical datasets.
    - Centralized secret management via Azure Key Vault, strengthening security across distributed Azure services.

    Azur
  • I
    Senior Data & Backend Engineer
    Independent Contractor Consultant
    Oct 2022 - Dec 2024 (2 years 3 months)
    Worked as a contractor across multiple full-time engagements, delivering backend and data platform solutions for global enterprise clients.

    Client: Samsung DSP (via Factored AI) — Senior Data Engineer
    Jun 2023 – Dec 2024

    Built an ad-tech audience data platform serving markets across US, EU, China, and worldwide.

    - Developed a high-throughput data platform in Go, PostgreSQL, and Snowflake on AWS/K8s enabling fast audience data access for decision-making across global regions.
    - Designed a new integration layer using Go, GraphQL, and REST APIs replacing a fragile legacy system.
    - Secured APIs with JWT token management and API key integration for third-party services.
    - Reduced cloud costs b
  • InMarket
    Data Engineer
    InMarket
    Apr 2021 - Oct 2022 (1 year 7 months)
    Built a scalable data platform and distributed ETL pipelines for location-based marketing analytics.

    - Implemented distributed ETL pipelines with Scala, Apache Spark, and AWS EMR processing millions of location events daily
    - Designed a microservices-based data platform using Python, MySQL, REST APIs, and Kubernetes enabling self-service data access for analysts and data scientists.
    - Developed an interactive data visualization tool (Python + React + MongoDB) empowering data science and QA teams to independently analyze results.
    - Managed Jenkins CI/CD pipelines, reducing release cycle time and eliminating manual deployment steps.
  • Globant
    Data Architect
    Globant
    Feb 2020 - Apr 2021 (1 year 3 months)
  • S
    Software Engineer
    Samsung Research America through Blue Trail Software
    Jan 2019 - Jan 2020 (1 year 1 month)
    Building SmartThings Developer Workspace platform.
    Java/Spring Boot, Kubernetes/Docker, Gitlab CI/Spinnaker, AWS Cloud, Zipkin/Datadog.
  • Blue Trail Software
    Senior Software Engineer
    Blue Trail Software
    Jan 2019 - Jan 2020 (1 year 1 month)
  • SparkDigital
    Senior Software Development Engineer
    SparkDigital
    Nov 2011 - Jan 2019 (7 years 3 months)
  • S
    Software Developer
    Southern Hills
    Sep 2011 - Nov 2011 (3 months)
  • Panvidea
    Desarrollador Java
    Panvidea
    Mar 2009 - Sep 2011 (2 years 7 months)
Education verified_user 0% verified
  • Universidad Nacional del Centro de la Provincia de Buenos Aires
    Universidad Nacional del Centro de la Provincia de Buenos Aires
    Universidad Nacional del Centro de la Provincia de Buenos Aires
Projects (professional or personal) verified_user 0% verified
  • P
    Panvidea
    Dec 2008
    Core team member. Involved in arquitectural and software design. Mainly focused in the design and implementation of end to end media encoding and processing workflows.