Senior Python Engineer

Salary range: B2B - 37-40 E/h + VAT Ciklum is looking for a Senior Python Engineer to join our team full-time in Poland.We are a custom product engineering company that supports both multinational organizations and scaling startups to solve their most complex business challenges. With a global team of over 4,000 highly skilled developers, consultants, analysts and product owners, we engineer technology that redefines industries and shapes the way people live.About the role:As a Senior Python Engineer, become a part of a cross-functional development team engineering experiences of tomorrow. Client for this project is a leading global provider of audit and assurance, consulting, financial advisory, risk advisory, tax, and related services. They are launching a digital transformation project to evaluate existing technology across the tax lifecycle and determine the best future state for that technology. This will include decomposing existing assets to determine functionality, assessment of those functionalities to determine the appropriate end state and building of new technologies to replace those functionalities.Responsibilities:Design and implement complex backend features from conception through to deployment, ensuring they meet strategic business objectives Write clean, secure, highly testable. scalable and well-documented code that adheres to coding standards and best practicesPerform comprehensive code reviews to ensure high code quality and facilitate knowledge sharing within the teamActively participate in multiple aspects of the SDLC, including planning, development, testing, and deployment Assist in upholding and enhancing the team's engineering and quality standards, and support team in adopting theseProactive position in solution development, processes improvementsDelivering the product roadmap and planning for the futureEngage in the technical interviewing processRequirements:Software Design:In-depth understanding of paradigms and principles such as Object-Oriented Programming (OOP), SOLID, and GRASPProficient in documenting complex software solutions through comprehensive technical documentation and detailed diagramsSoftware development:Extensive expertise in Python and knowledge of essential third-party libraries and toolsDeveloping and maintaining Python applicationsUtilizing Pandas for data manipulation, analysis, and processingWorking in production environments with Python and PandasConducting Technical Interviews (TIs) for other team membersProviding mentorship and guidance to junior developersProfound knowledge of Python frameworks like Flask, FastAPI and in-depth knowledge of their internal architectureCommercial experience with:ORM (e.g. Entity Framework, Dapper)RDBMSMessaging systems (e.g. RabbitMQ, ServiceBus)Testing frameworks (e.g. NUnit, XUnit, MSTest)Web ServersVersion control systems (e.g. GIT)Practical commercial experience in developing both monolithic and distributed systemsDeep understanding of RDBMS and NoSQL systems, experience crafting high-performance queries, executing optimizations, and designing database structuresExperience in deploying and managing applications within cloud environments such as AWS, Azure, and Google CloudQuality Assurance:Advanced proficiency with unittest, pytest, nose2 and other common testing toolsDemonstrated commitment to continuous quality enhancement on projects through conducting code reviews, establishing quality metrics, and monitoring themDesirable:Experience with Search Engines (e.g. ElasticSearch, Azure Search)Experience with REST API development for mobile applicationExperience with integration with 3rd party solutionsWhat`s in it for you?Strong community: Work alongside top professionals in a friendly, open-door environmentGrowth focus: Take on large-scale projects with a global impact and expand your expertiseTailored learning: Boost your skills with internal events (meetups, conferences, workshops), Udemy access, language courses, and company-paid certificationsEndless opportunities: Explore diverse domains through internal mobility, finding the best fit to gain hands-on experience with cutting-edge technologiesFlexibility: Enjoy flexibility – full remote working possibilitiesCare: We’ve got you covered with company-paid medical insurance, mental health support, and financial & legal consultationsAbout us:At Ciklum, we are always exploring innovations, empowering each other to achieve more, and engineering solutions that matter. With us, you’ll work with cutting-edge technologies, contribute to impactful projects, and be part of a One Team culture that values collaboration and progress.With delivery centers in Wrocław and Gdańsk, our 300+ professionals in Poland drive forward-thinking solutions for global clients. Join a community where collaboration sparks innovation—and your impact reaches millions.Want to learn more about us? Follow us on Instagram, Facebook, LinkedIn.Explore, empower, engineer with CiklumInterested already? We would love to get to know you Submit your application. We can’t wait to see you at Ciklum.