Senior Principal Python Developer

Hello, let’s meetWho We AreWhile Xebia is a global tech company, in Poland, our roots came from two teams – PGS Software, known for world-class cloud and software solutions, and GetInData, a pioneer in Big Data. Today, we’re a team of 1,000+ experts delivering top-notch work across cloud, data, and software. And we’re just getting started.What We DoWe work on projects that matter – and that make a difference. From fintech and e-commerce to aviation, logistics, media, and fashion, we help our clients build scalable platforms, data-driven solutions, and next-gen apps using ML, LLMs, and Generative AI. Our clients include Spotify, Disney, ING, UPS, Tesco, Truecaller, AllSaints, Volotea, Schmitz Cargobull, and Allegro or InPost.We value smart tech, real ownership, and continuous growth. We use modern, open-source stacks, and we’re proud to be trusted partners of Databricks, dbt, Snowflake, Azure, GCP, and AWS. Fun fact: we were the first AWS Premier Partner in PolandBeyond ProjectsWhat makes Xebia special? Our community. We run events like the Data&AI Warsaw Summit, organize meetups (Software Talks, Data Tech Talks), and have a culture that actively support your growth via Guilds, Labs, and personal development budgets — for both tech and soft skills. It’s not just a job. It’s a place to grow.What sets us apart? Our mindset. Our vibe. Our people. And while that’s hard to capture in text – come visit us and see for yourself.You will be:defining and evolving the technical roadmap for UCX migration workflows and platform architecture,driving key architectural decisions and ensuring consistency across storage, compute, and governance layers,leading the design and implementation of complex migration features and data workflows,optimizing Spark workloads and ensuring performance, reliability, and scalability of the platform,mentoring engineers, setting coding standards, and promoting best engineering practices,researching and prototyping new migration capabilities and Unity Catalog integrations.Your profile:expert-level knowledge of Python, with 2+ years of production PySpark experience,1+ years of hands-on architecture experience on Databricks, with deep understanding of Unity Catalog and Hive metastore,3+ years of technical leadership experience, driving engineering strategy and team delivery,proven experience leading enterprise-scale data platform migrations,strong background in distributed system design handling petabyte-scale data,solid understanding of data governance, compliance, and audit requirements,experience designing robust APIs and integration patterns for enterprise environments,passion for defensive programming and building scalable, reliable software,excellent written and verbal communication skills, able to lead cross-functional collaboration,strong problem-solving skills, strategic thinking, and decision-making under ambiguity,good verbal and written communication skills in English (min. B2),availability to work with US East Coast time zone.Work from EU and a work permit to work from EU are required.Nice to have:experience as a Staff or Principal Engineer at a major technology company,contributions to open-source data platforms,experience working directly with large enterprise customers in a sales engineering context,degree in Computer Science, Engineering, or a related technical field (or equivalent practical experience).Recruitment Process:CV review – HR call – Technical Interview – Client Interview – Decision Benefits ✍ Development:development budgets of up to 6,800 PLN,we fund certifications e.g.: AWS, Azure,access to Udemy, O'Reilly (formerly Safari Books Online) and more,events and technology conferences,technology Guilds,internal training,Xebia Upskill. We take care of your health:private medical healthcare,multiSport card - we subsidise a MultiSport card,mental Health Support.‍♂️ We are flexible:B2B or employment contract,contract for an indefinite period.