Full Stack Developer (Python/React)

Salary: 180000 to 226800 PLN per year Join Appsilon – a remote-first team that empowers pharmaceutical and life sciences companies to leverage open-source technology for faster, data-driven decision-making in regulated environments. We specialize in R, Shiny, and cloud technologies, and we’re passionate about open source, innovation, and building impactful solutions. Your responsibilities: Work with a team of developers on client projects Write high-quality code using Python (Django, Flask, or FastAPI) and ReactJS Build and improve web applications (HTML, CSS, JavaScript/TypeScript) Design and build APIs (especially RESTful APIs) Use databases like PostgreSQL or MySQL Understand client needs and turn them into working software Help plan and improve how we work (tools, code quality, etc.) Join discussions to make good technical decisions Curious about what we actually do? Check out our blog! We’re looking for someone who: Knows Python well and has experience with Django, Flask or FastAPI Can use ReactJS, JavaScript, and TypeScript Understands HTML, CSS, and web development best practices Has experience building APIs and working with databases Uses Git and deployment tools confidently Writes clean, well-organized code Can solve problems and work in a fast-paced team Works well with others and supports teamwork Enjoys learning new tools and technologies Can work independently and pay attention to details Has fluent English (C1 minimum) and self-organization skills to thrive in a remote-first setup Nice to have: SQL and ORMs (especially SQLAlchemy) Experience with Streamlit or R/Shiny Working knowledge of Docker and Unix Knowledge of Sass and data visualizations Understanding of CI/CD tools and cloud deployments Experience with ETL processes Knowledge of design patterns and SOLID principles We offer: Fully remote work, with flexible working hours that support focus, collaboration, and sustainable delivery. Hands-on development role where you build real, production-grade web applications used by global pharma and life sciences teams. Close collaboration with experienced developers, data scientists, and product-minded teams, with space to influence technical decisions and code quality. Exposure to regulated, data-intensive environments where engineering standards and thoughtful solutions truly matter. Competitive B2B compensation aligned with your experience and impact, with clear and transparent terms. Time and budget for continuous professional development, including courses, certifications, and learning new technologies. A transparent growth framework and career paths that support long-term development as an engineer. Modern equipment (MacBook or ThinkPad with Linux) and tools that enable efficient, high-quality development work. A remote-first, trust-based culture that values ownership, collaboration, and continuous improvement. Important note: To complete the hiring process, you need to have a valid government-issued ID (for Polish citizens) or a valid passport (for non-Polish citizens). What can you expect during the recruitment process? General interview with the People Team Technical task (Codility test) Technical interview Final interview with the Head of Technology Offer Does this sound like a great opportunity for you? Use the Apply button below! Appsilon is committed to being a diverse and inclusive workplace. We encourage applicants of different backgrounds, cultures, genders, experiences, abilities, and perspectives to apply. All qualified applicants will receive consideration for employment without regard to race, color, national origin, religion, sexual orientation, gender, gender identity, age, physical disability, or length of time spent unemployed.