Delfos
Posted 5mo ago

Backend Python Developer

Delfos
Barcelona, Catalonia, Spain
OnsiteFull Time
Responsibilities
  • developing applications
  • integrating APIs
  • modeling data
Requirements
  • Bachelor's in a related field
  • 5+ years experience
  • Experience with Python
  • Data orchestration (Airflow/Dagster/Prefect)
  • FastAPI, SQL, Git
  • Docker
  • Fluent English
Technical tools mentioned
AirflowDagsterPrefectPythonSQLAlchemyFastAPIFlaskPydanticSQLGitDockerDocker ComposeTimescaleDBAlembicPytestCI/CDKubernetesAI/ML

Job description

Interested in working with an AI Data Platform supporting sustainability, with backend Python development and Data Orchestration, i.e. airflow?
This is your chance to become part of a startup internationally recognized for its cutting-edge technology.

We are a predictive technology platform focused on maximizing performance and digitalizing operations in renewable energy parks.
Our mission is to develop optimized, profitable, and user-friendly solutions, ensuring high performance and sustainability for energy producers.
About the Position

We are looking for a Mid-Level Python Developer to strengthen our team and further boost our technical structure!
If you are driven by innovation and enjoy a collaborative environment, this could be the ideal opportunity for your career.

Main Responsibilities
- Develop, maintain, and evolve web applications using Python
- Create and integrate APIs using FastAPI
- Write SQL queries and interact with relational databases
- Participate in data modeling (entity-relationship) and normalization
- Use tools such as Git and Docker throughout the development lifecycle
- Apply, whenever possible, emerging AI/ML solutions and data-driven automation to improve delivery efficiency
- Collaborate with the team on continuous improvement of processes, testing, and code architecture

Required Qualifications
- Bachelor's degree in Computer Science, Computer Engineering, Systems Analysis and Development, or related fields
- Experience with Dagster, Airflow, or Prefect
- Knowledge of 
    - Python, 
    - SQLAlchemy, 
    - FastAPI or Flask, 
    - Pydantic, 
    - SQL, 
    - Data modeling, 
    - Git, 
    - Docker, 
    - Docker Compose
- Knowledge of AI/ML and data-driven automation
- Fluent English level

Nice to Have
- TimescaleDB
- Alembic
- Pytest
- Type hints
- CI/CD
- Kubernetes (deployments, services, ingress)
- Unit testing
- Knowledge of software architecture (patterns, repositories, services)

Delfos is doing more than predict failures it is scaling up operational knowledge.

Delfos Energy is an energytech focused on predictive maintenance solutions and digital transformation to improve performance in renewable energy generation.


 

About Delfos

AI-powered predictive maintenance and performance software for energy assets.

Year founded
2017
Employees
126
Organization type
Private
Latest investment
Raised $3.25M Seed (2026) — led by Contrarian Ventures, Headline, EDP Ventures, DOMO.VC
Headquarters
ES

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