PyCon Wroclaw

📢News from our partners. Join for Python Łódź #61 Don’t miss out on another evening of Python, insights, and community. Date: 2025-11-26 Time: 18:00 Location: IndieBI, Piotrkowska 157A, Hi Piotrkowska More details: meetup.com/python-%c5%82o…

PyCon Wroclaw 2025 has come to an end. I always see what could be improved in what already exists, so I'm never fully happy with what I've organized. But I see so many reviews, warm words, and thanks to your messages, I understand that everything turned out great. I can't tag everyone I'm grateful to – otherwise it would be quite a long list of everyone who was with us during all the preparation time and especially on November 14-15. I'm grateful to each of you – every speaker, sponsor, partner, participant, team member – you all create this wonderful atmosphere that everyone talks about! This year I received amazing support from the speakers. Your support gave me so much more confidence – thank you for that. It meant a lot to me. We'll do our best to continue what we're doing. But we can only make a conference with such an atmosphere together with you! I love working with post-conference feedback – it's the only way I really understand whether it makes sense to keep going. So I'm attaching a link to our feedback form here. If you have a chance to share your thoughts in more detail, we'd really appreciate it: forms.gle/1ViHiH9ZARn3uN… See you next time! Maria Linnikova, one of the PyCon Wroclaw team

📌Nowości od naszych partnerów Już 21.11 Data Science Summit – główne wydarzenie AI i *data* w regionie CEE. Więcej informacji i rejestracja na stronie: main.dssconf.pl

We’re looking forward to welcoming you to the conference!⏰ See you soon!

👏We’re pleased to introduce Pratibha Jagnere, Software Engineer at Google. 🎙 Talk: “Building High-Performance, Secure APIs with FastAPI” FastAPI is known for its simplicity, but taking it to production requires a deeper understanding of architecture, performance, and security. In this session, Pratibha will go beyond the basics to explore advanced FastAPI patterns for building scalable, secure, and production-ready systems. She’ll cover practical topics like dependency injection with yield, implementing role-based access control (RBAC), and achieving production readiness with background tasks and structured JSON logging – all aimed at helping developers deliver high-performance, maintainable APIs with confidence. Pratibha is an enthusiastic Pythonista who loves coding, books, and sharing her discoveries with the Python community through her conference talks.

👋We’re excited to introduce Alex Shershebnev, Head of ML/DevOps and DevRel at Zencoder. 🎙 Talk: “LLMs, Meet Your Tools: The Magic of Model Context Protocol” The Model Context Protocol (MCP) is transforming how developers interact with LLMs – enabling them to seamlessly connect models to external tools, APIs, and data sources directly within their IDEs. In this talk, Alex will explain what MCP is, why it matters, and how it unlocks smarter, context-aware workflows. He’ll show practical ways to integrate and build MCP servers, connect them to systems like Grafana, databases, and internal APIs, and demonstrate how MCP can supercharge productivity without switching between countless tools. Whether you’re a Developer, DevOps, or ML Engineer, this session will reveal how MCP brings the next level of automation and intelligence to your everyday workflow. Alex is an experienced Computer Vision and MLOps Engineer with over a decade in software development. Alex specializes in designing and implementing ML models, complex data pipelines, and high-performance systems for modern AI applications.

We’re excited to introduce Danny Burleigh and Agus Figueroa, Data Analysts at GetYourGuide. 🎙 Talk: “Trust Your LLM: Statistical Acceptance Sampling for Reliable Quality Measurement” How can you confidently evaluate the quality of LLM outputs without manually reviewing thousands of samples? In this talk, Danny and Agus will introduce a statistical acceptance sampling framework that helps determine exactly how many outputs to check – enabling teams to quantify LLM quality at a chosen confidence level with minimal effort. You’ll learn a practical, statistically sound approach to measuring reliability in AI systems – one that saves time while ensuring you can truly trust your model’s results. 👨‍💻 Danny Burleigh is a Data Analyst with a background in mathematics, passionate about experimentation, teaching, and helping others understand and trust their data. A proud Mancunian and football enthusiast, he brings analytical precision and humor to everything he does. 👨‍💻Agus Figueroa combines an engineering mindset with creativity – from improv theatre to music and long-distance running. Originally from Patagonia, Argentina, he brings both technical depth and artistic energy to his work at GetYourGuide.

We’re delighted to welcome Sebastian Buczyński, Trainer and Consultant at Bottega IT Minds. Sebastian will deliver two insightful talks at the conference: 🎙 14 November – “A Software Dev Optimized an App, but Nobody Congratulated Them Because It Was Written in Python” Over the years, Python has gained a reputation for being “slow”, but is that really true? In this talk, Sebastian cuts through the myths surrounding Python’s performance, focusing on real-world data, effective optimization strategies, and practical case studies from production systems. Learn what truly matters when tuning performance and how to choose wisely what to optimize and when. 🎙 15 November – “Pythonic [Anti]patterns That Age Like Milk” Best practices evolve and what was once considered “Pythonic” may now be an anti-pattern. Sebastian will explore outdated idioms and coding habits that silently harm projects, showing how to replace them with modern, maintainable approaches for today’s Python ecosystem. Sebastian has been sharing his knowledge at Python conferences since 2014 and enjoys exploring the world on his motorcycle when he’s not diving deep into code.

👋We’re excited to introduce Isaac Chung, Staff Machine Learning Scientist at Zendesk, and Kajetan Bochajczuk, Senior Data Scientist at Zendesk – a duo turning AI challenges into scalable, production-ready solutions. 🎙 Talk: “How AsyncIO Saved Our LLM Production Service” What happens when your shiny new AI feature takes over 15 seconds to process a single request? For Isaac and Kajetan, it meant frustrated users, stalled adoption – and a system that seemed doomed to fail. In this talk, they’ll share how they cut processing time by 98%, transforming a blocking, slow LLM proxy into a high-performance async pipeline capable of handling 1000+ items effortlessly. You’ll discover practical AsyncIO patterns, circuit breaker designs, error-handling strategies, and rate limiting techniques that keep large-scale AI systems reliable and efficient. By the end, you’ll learn how thoughtful design, refactoring, and async best practices can turn an unscalable prototype into a production success story. 👨‍💻 Isaac Chung, focused on building scalable and maintainable LLM-powered systems that process millions of conversations daily. 👨‍💻 Kajetan Bochajczuk is a mathematician by training, and an NLP specialist with a growing passion for graphics programming.

🙌We are glad to introduce Denys Diakonov, Senior Software Engineer at GlobalLogic, with over five years of experience designing, building, and scaling applications across multiple business domains. 🎙 Talk: “Beyond Threads: Rethinking Parallel Processing for Python Web Applications” The Python community often debates threading, multiprocessing, and async programming – yet in real-world web development, these concepts often remain theoretical. Denys will explore how modern cloud-native solutions can reshape the way we approach parallel processing in Python web apps, reducing complexity, infrastructure overhead, and cost. This talk isn’t just about new tools – it’s about rethinking our mindset toward building scalable, efficient, and future-ready Python applications.

We’re excited to present a joint session by Mateusz Zaremba, Application Architect at Ørsted, and Krzysztof Wilczyński, DevOps Consultant at Amazon Web Services. 🎙 Talk: “Async Python: Concurrency Without the Headaches” Asynchronous programming in Python has become essential for building high-performance applications, but for many developers, concepts like async, await, and the event loop still feel intimidating. In this talk, Mateusz and Krzysztof will offer a clear, hands-on introduction to async programming in Python, explaining how concurrency really works under the hood. They’ll cover key async concepts, common patterns like asyncio.gather and task coordination, and demonstrate real-world use cases such as concurrent API calls and async database operations. Expect a live debugging session, a dive into one of the classic async pitfalls, and a look at Asyncer, a modern library that simplifies async workflows. 👨‍💻 Mateusz Zaremba has a strong background in cloud technologies, AI/ML, and DevOps. Before joining Ørsted, he worked at AWS and has extensive experience as a full-stack developer in Django and React. 👨‍💻 Krzysztof Wilczyński specializes in Python, serverless architectures, and cloud security. He helps enterprise customers design secure, scalable, and cost-optimized cloud solutions.

🤩We are pleased to introduce our next speaker – Anastasiia Tymoshchuk, Engineering Manager. She will come to us from Berlin, Germany. 🎙 Talk: “Practical Guide to Your Perfect Documentation” Documentation is an essential part of every project – yet it’s rarely up to date. Keeping it current requires time, consistency, and motivation, which can be hard to maintain under tight release schedules. In this talk, Anastasiia will walk through the fundamentals of great documentation, exploring its different types, and demonstrating how AI and LLMs can assist in creating and maintaining it. Participants will also get hands-on insights into setting up continuous documentation and learn the basics of building a developer portal – all while keeping the process practical and even a bit fun. Anastasia has been working in the IT industry for over 11 years, including experience in e-commerce as well as game development. She has a lot of experience with various software architectures in different domains. She is also one of the organizers of PyBerlin meetup based in Berlin.

👏We are honoured to welcome Łukasz Langa, CPython Developer in Residence at the Python Software Foundation, as the keynote speaker of our conference. Łukasz is a Python core developer and the creator of Black, the widely used opinionated code auto-formatter that has reshaped how Python developers write clean and consistent code. As the Release Manager for Python 3.8 and 3.9, he has made a lasting impact on the language and its community. 🎙 “Permacomputing and Python” Will you be able to access your cloud data in 10 years? Can you easily retrieve your photos, notes, and other personal data in open formats – or has it all been locked away by vendors and obsolete devices? In this keynote, Łukasz will explore the philosophy of permacomputing – building technology that lasts – and highlight how Python can play a role in creating more sustainable, resilient computing. He’ll challenge us to rethink our relationship with software, data, and devices – and show how developers can reclaim agency over their digital lives.

We are pleased to present our next speaker – Agus Figueroa, Senior Data Analyst at GetYourGuide. 🎙 Talk: “How Data Modelling Can Help New Products in Your Marketplace Shine” Agus will explore how Bayesian statistical modeling can determine when new marketplace products are ready for competition – even when data is limited. He will walk through the key statistical foundations, real-world implementation challenges at scale, and the impact data modeling can have on strategic product decisions. ✨ Key takeaways: 📎Learn how Bayesian methods support flexible and interpretable decision-making in business 📎Understand why statistical modeling can outperform machine learning in scenarios with sparse data and risk considerations 📎Explore practical insights from applying Bayesian models in a real marketplace environment With an engineering background at his core, Agus combines analytical expertise with a passion for the stage – from improv theatre to singing and music. Outside of work, he finds balance in mid- and long-distance running. Originally from Patagonia, Argentina, he brings both technical depth and creative energy to everything he does.

Next up! Jan Bielecki, Senior Full Stack Developer at Ørsted. 🎙 Talk: “Consistent Importing” 🔎Jan will take a deep dive into Python’s import system - what really happens behind the scenes when we write import and why it matters more than we think. He will explore importing strategies, how they influence project architecture, and what to do to maintain modularity and avoid technical debt in large codebases. The session will also cover practical tooling: from Import Linter to Ruff, and how to integrate them into CI pipelines to enforce consistency and prevent common structural pitfalls. Whether you're new to Python or already an experienced developer, Jan’s talk will help you streamline imports, improve maintainability, and scale your projects with confidence. Jan Bielecki is the Senior Full Stack Developer with over six years of professional experience in software development. He is passionate about science, digital and energy transformation, as well as sports and music.

PyCon Wroclaw 2025 is coming soon! 🚀 We can’t wait to meet the Python community again – learning, connecting, and having a great time together! 📅 November 14-15 – check out the schedule on our website and join us in Wroclaw! pyconwroclaw.com Let’s make this year even bigger and better! 🐍✨

Meet our next speaker – Dorota Ostrowska, Full Stack Developer at Ørsted. 🎙 Talk: “How a List Broke My App: A Tale of Mutability” 📍In her session, Dorota takes us on a journey into Python’s world of mutability, where a tiny change in a list can unexpectedly break an entire application. She will explain how references, identity, and copying behave in different data structures like lists, tuples, and strings, and why mutable default arguments can become a developer’s worst nightmare. Packed with practical examples, clear explanations, and those satisfying “aha!” moments, this talk is perfect for Python newcomers and a great refresher for experienced developers who want to avoid the classic pitfalls of mutability. With a background in power engineering, she now combines Python and cloud technologies to build tools for energy simulations. Dorota is also an active member of the Python community, involved in PyLadies and passionate about helping beginners take their first steps in tech. And yes – she codes alongside her miniature poodle named Api (like Application Programming Interface 😉).

Today we introduce our next speaker – Kasper Kalfas, Senior Cloud Data Architect at Software Mind. He will present his talk: 🎙 Building a Personal Biohacking Data Platform with Python: From Wearables to AI Insights 🔎 What to expect from the session: Build your own biohacking data platform with Python – from ingesting wearable metrics (sleep, stress, workouts) to transforming data with Pandas and PySpark, and finally using BI and AI to talk to your data and uncover valuable personal health insights. With over a decade of experience in designing and delivering modern data and AI platforms in the cloud, Kasper has worked across multiple industries, helping organizations build scalable solutions with Python, PySpark, and cloud-native tools.

We continue to introduce our excellent speakers. 🎙Meet Roman Zaiev, Founder & CEO Hypha with his talk "Rethinking the Stack: Contemporary Python Patterns that Just Work". His talk is a fast-paced tour of real-world cases, packed with insights that will make your day: 📎Dependency Injection in Python We need to legalise it. Bringing true DI will make your code shine. 📎Hexagonal Architecture works and scales "Ports-and-adapters" keeps your core logic flexible and independent. 📎Pipeline-oriented programming Programming is, at its heart, all about data transformation. 📎Stop using your ORM (please) No, really. Stop it. There’s a better way. 📎FastAPI beyond REST Server-side rendering is trendy again! Use SSE and Hypermedia to build your next big thing. 📎Don’t underestimate PostgreSQL You might not need Celery or a fancy pub/sub. FOR UPDATE SKIP LOCKED. Only battle-tested patterns and tools to help you move fast and stay in control as complexity grows in your own Python projects. After 14 years of engineering, most recently as a Senior Engineer at a leading UK fintech, Roman is now focused on his own venture – Hypha, a video-on-demand marketplace designed for professional creators.