Senior Software Engineer - Python (FastAPI | Azure | Data …, Hoofddorp

At Kyndryl, we run and reimagine the mission-critical technology systems that drive advantage for the world's leading businesses. We are looking for a Senior Software Engineer to join the DIAL (Data Integration&Analytics Layer) team, responsible for building scalable, high-performance enterprise applications that power data preprocessing, observability, and data product pipelines. The role involves designing and developing API-driven platforms using FastAPI, integrating with Azure data services, and contributing to reliable, observable, and production-grade data systems.

Design and develop high-performance backend services using FastAPI, Pydantic, and SQLAlchemy Build and maintain API-driven data processing and orchestration frameworks within DIAL Implement asynchronous and concurrent processing using Python (asyncio) for scalable workloads Integrate with Azure services such as ADLS, ADF, Databricks, and related data platformsDevelop robust data models, validation layers, and persistence mechanisms Ensure observability, logging, and monitoring for enterprise-grade applications Write unit and integration tests using Pytest to ensure code quality and reliability Collaborate with data engineers, architects, and product owners to deliver end-to-end solutionsYou're good at what you do and possess the required experience to prove it. keen to drive your own personal and professional development. Core Engineering Strong experience in Python backend development Cloud&Data Platforms ADLS (Azure Data Lake Storage), Azure Data Factory / Databricks (preferred) Working knowledge of Python Asyncio Testing Experience in unit, integration, and API testing Experience with performance testing and tuning Experience in data engineering or data platform ecosystems Ability to work in cross-functional teams (engineering, product, operations)Your career with us isn't just a job—it's an adventure with purpose. Our Be Well programs are thoughtfully designed to support your financial, mental, physical, and social health—because we know that when you feel your best, you do your best. With powerful tools to chart your career path, personalized development goals aligned with your ambitions, and continuous feedback to keep you inspired and on track, you'll have everything you need to thrive and evolve. And through it all, you'll be part of a culture that values empathy, restless learning, and a devotion to shared success.We want you to thrive here—and we're committed to helping you do just that. Join us and help shape what's next.