Senior Software Engineer / Tech Lead ( Python / React)

Hello,

We are called People More because we treat our employees with respect, but also because the projects we work on are for people and should be easy and pleasant to use. We are technological, but we look at the bigger picture :)

The company is made up of people with a huge client base in the country and abroad, for whom we build projects from scratch (UX, UI, frontend, backend, mobile) or in part. We work directly for our clients and also support our partners in their own solutions. This ensures a wide range of projects and the ability to change! We work with clients all over the world.

For the project that we are working on with our partner, we are looking for Senior Software Engineer / Tech Lead ( Python / React)

Your duties will include:

• Developing and maintaining backend services, frontend applications, and data pipelines.
• Building backend solutions in Python using FastAPI, Pydantic, and SQLAlchemy.
• Analysing and optimising Microsoft SQL Server databases, including queries, indexes, and execution plans.
• Supporting frontend applications developed with React and JavaScript.
• Developing and maintaining processes responsible for supplying the platform with market data.
• Supporting quantitative models used for valuation, risk management, and market analysis.
• Reviewing solutions delivered by the Central IT team and identifying technical, performance, and architectural issues.
• Providing professional and constructive technical feedback.
• Acting as a technical link between the local office in Switzerland and the Central IT team in Greece.
• Translating the needs of traders and analysts into practical technical solutions.
• Supporting Docker-based deployments and multi-service environments.
• Combining locally developed business tools with corporate solutions, standards, and platforms.

Requirements that must be met:

• Experience in developing and maintaining production software systems.
• Very good knowledge of modern, typed Python.
• Experience with FastAPI, Pydantic, SQLAlchemy, or similar technologies.
• Very good knowledge of Microsoft SQL Server and T-SQL, particularly in the following areas:
  • query optimisation,
  • indexing,
  • execution plan analysis,
  • database schema design,
  • working with large datasets.
• Experience with Docker and multi-service environments.
• Practical knowledge of React and JavaScript. The role may be more backend-focused, but it requires the ability to work across the full technology stack.
• Ability to analyse existing solutions and assess their quality, performance, and architecture.
• Strong analytical skills and the ability to understand complex business processes and data flows.
• Excellent communication skills.
• Ability to professionally challenge technical decisions and propose better solutions.
• Independence, ownership, and willingness to lead solutions from analysis through implementation and deployment.
• Very good English and Polish.

Nice to have:

• Experience in energy, commodity trading, or financial markets.
• Knowledge of areas such as power, gas, emissions, forward curves, positions, P&L, valuation, or risk.
• Experience with pandas, NumPy, PyArrow, Dagster, or Jupyter.
• Knowledge of Rust, C++, C#, or F# in performance-sensitive solutions.
• Experience working at the intersection of local business needs and centralised corporate IT structures.

Responsibilities

140 - 190 zł/h