Daniel Doblas Jiménez

Player bio

Inventory

• API API Development FastAPI, Django
• SQL SQL & PostgreSQL Query plans & tuning
• MOD Data Modeling Schemas & indexing
• ELT Data Pipelines Airbyte, Python, Polars
• DWH Analytics Engineering dbt, layered models
• ORC Orchestration Dagster, Airflow
• OPS Platform Docker, Kubernetes, CI
• BI Dashboards Metabase, Streamlit
• QA Quality Tests, typing, data checks
• UI UI Development Angular

Quest log

Daruma rule: one eye is painted when a goal is set, the second when it is reached.

1. World 5 ● In progress

   Software Engineer

   Ilkari · Málaga · 2026 – Present

   • Build the Python (FastAPI) services behind a domain registration platform that integrates with registries over EPP.
   • Build the company's data platform: Airbyte ingestion, dbt models, Dagster orchestration and Metabase dashboards on Kubernetes.
   • Deliver ETL pipelines and dashboards for departments across the company.
   • Work across the platform and development teams to align delivery between projects.
2. World 4 Cleared

   Data Engineer

   Ciklum · Málaga · 2024 – 2026

   • Built and maintained ETL pipelines, with validation and cleaning steps that kept downstream reporting consistent.
   • Tuned slow queries and redesigned database structures to make reporting faster and more accurate.
   • Built Python applications and API integrations between internal systems with cross-functional teams.
   • Split complex workflows into smaller components that were easier to test and maintain.
3. World 3 Cleared

   Junior Data Engineer

   The Workshop · Málaga · 11/2023 – 12/2024

   • Designed database schemas and indexing strategies for efficient storage and retrieval.
   • Re-engineered legacy systems on modern frameworks, reducing technical debt without hurting stability.
   • Built data mining and analysis jobs, and evaluated Hadoop and Spark for large volumes of unstructured data.
4. World 2 Cleared

   Junior Software Engineer

   The Workshop · Málaga · 09/2022 – 11/2023

   • Diagnosed defects and failures, and shipped the refactors and design fixes that resolved them.
   • Delivered features on schedule as part of a Scrum team.
   • Wrote and maintained technical documentation.
   • Worked with partners in the blockchain ecosystem to share knowledge.
5. World 1 Cleared

   Researcher

   ITIS "José María Troya Linero" · Málaga · 10/2020 – 09/2022

   • Ran research projects in parallel with interdisciplinary teams.
   • Built web applications with JavaScript, SQL and HTML.
   • Improved website performance by optimizing front-end and back-end code.

Side quests

Open-source projects. Each one is small, strict and documented.

• Tooling python-project-template ↗ Copier template for Python projects: uv, Ruff, strict mypy, pytest with coverage gates and SHA-pinned CI that tests the template itself.
  • Copier
  • uv
  • GitHub Actions
• Data pipeline Batch-Ingestion-Pipeline ↗ Batch ELT from the GitHub REST API: schema validation, partitioned Parquet raw layer, Postgres and dbt staging, orchestrated by Airflow.
  • Airflow
  • dbt
  • PostgreSQL
• Foundations de-toolbox ↗ Reproducible data engineering environment: seeded PostgreSQL in Docker, strict Python tooling and SQL exercises with committed EXPLAIN ANALYZE plans.
  • PostgreSQL
  • Docker
  • SQL

Logbook

Notes on engineering and teams, published on Medium.

1. Jul 2026 Why your "all-senior" team might be a bigger risk than you think ↗
2. Apr 2026 To UUID or not to UUID? Performance vs. scalability in database design ↗

Training