Senior Software Developer (Python 80% / Java 20%)

We are looking for a Senior Software Developer to join a long-term project for one of our enterprise clients. You will work on building and scaling monitoring applications for critical energy infrastructure.

Start Date: October 26, 2026
Duration: ~1 year (until October 30, 2027)

What You Will Do

Develop and maintain core backend logic for energy monitoring applications (approx. 80% Python / 20% Java).
Build high-performance REST APIs and microservices using FastAPI and Spring Boot (JDK 21+).
Implement asynchronous event streams and data messaging workflows with Apache Kafka.
Configure and deploy application manifests using Helm Charts and containerization tools.
Collaborate actively in an Agile environment (Scrum or Kanban) to ensure stable delivery.

What We Are Looking For
Core Requirements:
5+ years of commercial experience in IT solution development.
Python Expertise: Strong hands-on experience with FastAPI, Kafka, and Helm Charts.
Java Competency: solid background with Spring Boot, JDK 21+, and Maven.
Proven experience working in Agile software development teams (Scrum or Kanban).
Upper-Intermediate+ English communication skills (written and spoken).
Nice to Have:
DevOps & Tooling: Kubernetes, Argo CD, Protobuf, Pydantic, Grafana.
Domain Experience: Background in the Energy sector, SCADA, PMU, Power Quality, or critical infrastructure systems.

Tech Stack
Core: Python, FastAPI, Java, Spring Boot (JDK 21+), Kafka, Helm Charts, Maven
Ecosystem / Infrastructure: Kubernetes, Argo CD, Protobuf, Pydantic, Grafana

How to Apply / Submission Details
If you are interested, please submit the following details before the deadline:
CV in PDF or Word format.
Hourly rate (in EUR/USD).
Current location.
Earliest availability / notice period.

Application Deadline: October 5, 2026 (inclusive)