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Senior Python Developer Position

Start Date: 01/09/2026

Duration: 1 year (extendable)

Work Regime: Full-time, 2 days onsite

Languages: Fluent in English; Dutch or French is a plus.

Responsibilities:

• Design and implement backend services in Python to support asset onboarding, contract management, and market operations.
• Develop APIs and data pipelines to integrate application components with the broader information ecosystem, including internal and external applications, data hubs, and other data storage systems.
• Build integration with messaging systems (MQTT, RabbitMQ) for real-time data ingestion.
• Work with PostgreSQL for relational and time-series data modeling, optimization, and integrity.
• Leverage AWS services such as RDS, S3, IAM, Lambda, ECS, and Docker.
• Collaborate with product managers and domain experts to translate business needs into scalable software features.
• Contribute to agile delivery processes, including sprint planning, retrospectives, and team coordination.

Required Skills and Experience:

• 6+ years of Python development experience (application development).
• Proficiency in PostgreSQL, including schema design, performance tuning, and time-series data handling.
• Experience with AWS services (RDS, S3, IAM, ECS, and Docker).
• Understanding of energy trading concepts such as position management, day-ahead/intraday markets, and ancillary services.
• Experience working with APIs, data pipelines, streaming, and other system integration paradigms.
• Familiarity with agile development practices and collaborative delivery environments.

Desired Skills:

• Knowledge of power markets, specifically in renewable technologies (solar, wind, battery energy storage systems) and their specificities about contracting (PPA), asset management, and energy trading.
• Proven experience or willingness to quickly learn developing modern web user interfaces using React with UI styling approaches such as JSS, CSS-in-JS, Material UI, Emotion, Styled, or equivalent technologies.
• Experience with FastAPI or alternatives (e.g., Flask, Django).
• Familiarity with container orchestration or CI/CD pipelines.

Soft Skills:

• Strong communication and interpersonal skills, with the ability to work across disciplines and cultures.
• Proactive mindset with a collaborative spirit and a willingness to support team delivery.
• Ability to break down complex problems and propose pragmatic, scalable solutions.
• Comfort working in a fast-paced, evolving environment with a high degree of autonomy.
• Empathy, humility, and a strong sense of ownership and accountability.