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Backend Engineer – Energy Optimization Platform

Brno
Full-time
Permanent employee

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.