Backend Engineer

Company Overview: Wattstor is an innovator in the Electrical Power Engineering sector, focusing on automated energy management and battery energy storage systems. Our fast-growing company has developed its own Energy Management System, 'Podium,' a blend of state-of-the-art hardware technology and intelligent automation software that enhances energy cost savings for customer site deployments. We help industrial and commercial customers maximize the value from their transition to Net Zero through intelligent management of Photovoltaic Power Plants, Battery Storage Systems, Electric Vehicle Chargers, and Flexible Loads (including heating and cooling applications). This approach allows us to offer Energy Trading in addition to the several interesting functionalities of the EMS. Role purpose: Were 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, lets talk. What Youll 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 Youll 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 What Were Looking For You definitely should have: Min 4 years of backend development experience in Python. Strong grasp of OOP and clean code practices. Experience building REST APIs (FastAPI would be ideal). Experience designing system architecture and microservices. Confidence working with SQL databases and Linux environments. A healthy obsession with testing and code quality. Bonus points if youve worked with: Docker and containerized deployment. AWS services. CI/CD pipelines (GitHub/GitLab preferred). Monitoring/logging tools (e.g., CloudWatch, Sentry). Message brokers like SQS or RabbitMQ. Time Series databases like InfluxDB or Timestream. Energy systems, or data-heavy platforms. Want to write code that helps decarbonize the grid? Want to work with smart people who care about both engineering and the planet? This might be the place. Why us? Flexible working hours (hybrid model with offices in Brno, Brumov-Bylnice, and home office). Motivating salary package. Quarterly bonuses. 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. Meal and phone allowance. Company events (Czech and Great Britain colleagues). Multisport, fruit days.