Python Developer (ZZP)

What We Do

Utilus is a fast growing and highly ambitious software delivery company. We design, build, manage and operate highly scalable and complex software projects in the heart of the primary business processes of our clients, including Tennet, Eneco, Dura Vermeer and Nederlandse Loterij.

We work on sustainability by focusing mainly on assignments in the heart of the energy transition. We believe in the universal truth that true transformation is only attainable if our clients are prepared to Do the work. That’s why at Utilus, we help our clients to Do the work: by  developing an approach to improve and renew essential IT, all while keeping the clients business running smoothly.

We take an honest and constructive approach, our two core values, to renewing and enhancing essential IT systems.

About The Job

You will be responsible for designing, developing, and deploying high-value and performance services with architects from an early phase of the product, leveraging your expertise in Python and related technologies.

Key Responsibilities Python Developer

• Problem Solving: you identify and troubleshoot issues, providing timely resolutions

• Collaboration with Teams: you closely  collaborate with Front-End Developers, Product Manager, Software Architects and Project Managers to guarantee that proposed solutions are implemented accurately and on time

• Design and implement own solutions: you design and implement scalable analytical applications in the energy trading and management domain using Python workflows (e.g., Airflow) and time-series computations

• Your responsibilities include:

  • Develop APIs (e.g., REST APIs using FastAPI)

  • Containerize and deploy applications to a Kubernetes cluster

  • Work with PostgreSQL (or derivatives like TimescaleDB)

  • Utilize ORMs, like Entity Framework

  • Utilize Alembic and SQLAlchemy for database migrations and ORM management

• Contribute to code reviews, ensuring best practices and coding standards are upheld

• Fast paced: you work in a fast-paced environment with constantly changing requirements

• Identify and troubleshoot issues, providing timely resolutions

What We Are Looking For

• Bachelor's/Master degree in IT (or related) field

• Strong experience in Python development (5–8 years)

• Proficient in FastAPI for building APIs

• Solid understanding of SQL, extensive experience with PostgreSQL 

• Experience with SQLAlchemy (or other ORM); experience with Alembic for database migrations is a plus

• Hands-on experience with pandas and Databricks

• Hands-on experience with Microsoft Azure services

• Experience with DevOps practices and CI/CD pipelines

• Knowledge of TimescaleDB, Temporal, Airflow, MLflow, Druid is a plus

• Your communication skills are excellent. You communicate the architectural design and technical solution with the client and the team and set clear goals to work towards

• You have a hands-on mentality and you are comfortable in fast paced environment with constantly changing requirements

• You are self-motivated and pro-active, with the ability to work independently  

• Your  communication skills in English are excellent (Dutch is plus)

• Experience in the energy domain is a plus

What We Offer

• Challenging project in the energy sector 

• Start date: As soon as possible

• Work week: 40 hours 

• Duration of the project: July 31, 2026 (with an option to extend)

• Location: Hybrid (office in Rotterdam)

Please note that we only accept applicants that are located in the Netherlands at time of application.