Job Title: Python Developer (Data Engineering & TDD) About the Role We're looking for a skilled Python Developer with strong experience in data wrangling and processing using Pandas and Polars , and a passion for writing clean, testable code using TDD . You'll be part of a collaborative … engineering team focused on building efficient, scalable data solutions that drive critical business insights. Key Responsibilities Design, develop, and maintain robust data processing pipelines using Python , Pandas , and Polars Apply test-driven development (TDD) practices to ensure code quality and reliability Optimize performance of data transformations on … large-scale datasets Collaborate with data scientists, analysts, and other developers to build and improve data products Contribute to architectural decisions and best practices in data engineering Maintain clear documentation and participate in code reviews Requirements Must-Have: 3+ years of Python development experience Strong experience with More ❯
East London, London, United Kingdom Hybrid / WFH Options
UMATR
Strong grasp of systems programming concepts: memory management, concurrency, multithreading Solid experience with PostgreSQL and working with large-scale datasets Strong knowledge of algorithms, datastructures, and software design principles Proficient with debugging, performance tuning, and profiling tools Clear communication skills with a proactive, team-oriented mindset Experience More ❯
East London, London, United Kingdom Hybrid / WFH Options
Richard Wheeler Associates
reconfigures upon login to deliver different experiences depending on the user persona (patient, clinician, executive, etc.). APIs are to the backend app, the data warehouse and proprietary clinical CMS. The JS + TS codebase is a mixture of polymorphic classes and functional services. There is a lot of … frontend development, including complex web apps Proficiency in JavaScript (ES6+), Vue 3 and TypeScript Strong understanding of design patterns, architectural best practices, OOP and datastructures Comfortable contributing to architectural discussions and tech decisions Strong understanding of frontend test automation, creating tests as part of the definition-of … software development kits (SDKs) Familiar with microservices architecture Working experience with TailwindCSS, Vuetify or any other frontend design libraries The companys mobile, web and data products are live in 12 countries and 8 languages, spanning 3 AWS regions. Their business is growing very strongly. Working with the Lead Frontend More ❯