Python developer – Energy Optimization Platform
Wattstor · Brno, South Moravian Region, Czechia
Services for Renewable Energy · 51-200 employees
About the role
You will design and build reliable backend services and RESTful APIs using Python and FastAPI to optimize energy systems. Additionally, you will contribute to system architecture, maintain CI/CD pipelines, and collaborate on cloud infrastructure management.
What they look for
Requirements
The role requires at least 4 years of professional software development experience with strong Python and FastAPI skills. Candidates should also have experience with SQL databases, unit testing, and ideally familiarity with Docker and AWS.
Benefits
Full description
Your mission
Role purpose: We’re looking for a backend developer to join the engineering team behind our Optimization Engine — a core product that does the smart management of batteries, renewables, and energy systems to cut costs and carbon. If writing clean, scalable APIs and wrangling real-world data sounds like your kind of thing, let’s talk. What You’ll Be Doing
- Designing and building reliable backend services and RESTful APIs using Python and FastAPI.
- Collaborating on a tool for optimizing energy systems, batteries, and renewables — yes, the kind that help fight climate change.
- Helping shape and evolve our system architecture (microservices), including proposing a concept for the next stages of product development.
- Reviewing code, writing tests, and generally making the codebase a better place.
- Helping maintain our CI/CD pipelines, Dockerized environments, and cloud infrastructure (AWS).
Tech Stack You’ll Touch
- Languages & Frameworks: Python, FastAPI
- Infrastructure: Docker, Git, AWS (Lambda, ECS, S3, CloudWatch, SQS)
- Databases: PostgreSQL, InfluxDB
- Practices: Agile, Continuous Delivery, Automate-All-The-Things
Your profile
Required Skills
· min 4years of professional software development experience.
· Strong Python programming skills with OOP principles.
· Experience building REST APIs using FastAPI.
· SQL database experience.
· Strong unit testing skills.
Nice to Have
· Experience with Docker and application containerization.
· Experience with AWS services.
· GitLab/GitHub CI/CD pipeline experience.
· Experience with monitoring, logging, and observability tools.
· Experience with message brokers (SQS, RabbitMQ).
· Familiarity with time series databases (InfluxDB/Timestream).
· Background in energy systems or data processing.
Why us?
- Motivating salary package.
- Quarterly bonuses & Sales Commissions
- Exciting Industry Sector which is full of innovations
- Professional growth, educational support and team growth opportunities
- 25 days of vacation and 5 sick days.
- Human-centric approach and team support.
- Opportunity for international training.
- Flexible, hybrid working hours (offices in Brno, Brumov-Bylnice and home office).
- Meal and phone allowance.
- Company events (Czech and Great Britain colleagues)
- Multisport card, fruit days
About us
Wattstor is a next-generation energy company accelerating Europe’s transition to net zero. We
specialise in delivering renewable energy systems, on-site energy optimisation, and dynamic tariffs for
businesses across the continent. Our mission is to make sustainable technology not only accessible
but also simple and impactful.
Backed by years of R&D and real-world deployment, Wattstor’s smart energy solutions are fast to
implement, easy to manage, and built to reduce both costs and carbon emissions.
