Python Developer

We are looking for an experienced Python Developer responsible for developing and maintaining backend applications and AI-powered solutions for our clients. At Halcyon Labs , we focus on continuous self-development and acquiring new knowledge. We build solutions leveraging various cloud platforms and utilize cutting-edge technologies to deliver innovative results. If you are a fast learner, want to participate in international projects, are a team player, and can work independently — join us! We provide our clients with more than just code — we want to equip them with tools that allow their businesses to flourish. Our clients' success is our success, which is why we ensure that everyone who creates Halcyon Labs has a long-term goal in mind. At Halcyon Labs, you'll have the opportunity to discuss your challenges and solutions with our team of experts, including experienced architects who are always ready to share their knowledge and guide you through complex technical decisions. Key Responsibilities Design, develop, and maintain scalable backend applications using Python Build and integrate AI solutions using LLM technologies (OpenAI, GPT) and Generative AI Develop RESTful APIs and microservices architectures Work with relational databases and optimize database queries (SQL/Alchemy knowledge) Collaborate with cross-functional teams to deliver high-quality software solutions Write clean, maintainable, and well-documented code Participate in code reviews and maintain coding standards Support application deployment and maintenance processes Requirements Minimum 5+ years of experience in a similar position Strong programming skills in Python and knowledge of relational databases (SQL/Alchemy frameworks) Experience in building and developing applications using LLM technologies (OpenAI, GPT) Analytical thinking abilities Higher education in computer science, related fields, or equivalent experience Nice to have: Experience in creating, testing, and maintaining backend components in .NET, Java, or Node.js Knowledge of web application development (FastAPI or Flask frameworks) Familiarity with virtual environments and tools like Poetry or Pipenv Experience with data science frameworks and libraries (Pandas, NumPy, SciPy, Spark) Knowledge of various testing techniques for software development (e.g., pytest) Understanding of static code analysis tools (e.g., flake8, pylint) Knowledge of version control systems, project templates, and their practical application What We Offer: Salary: 17000 – 22000 PLN + VAT (B2B contract) Co-financing for training and certifications, as well as guaranteed time for learning during working hours Private medical care and a Multisport card Language classes (English) Remote and flexible working hours Team integration meetings and company events Employee referral program with a bonus