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Senior Full-stack Developer

Remote in Poland
Python.Web& 14 others
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We're seeking a Senior Full-stack Developer to help build a new product using Python and FastAPI for the backend, React/TypeScript for the frontend, and PostgreSQL and OpenSearch for database management. The product runs in a multi-cloud environment and relies heavily on Databricks.

Responsibilities
  • Build and maintain web applications with Python/FastAPI and SQL
  • Design APIs and integrations that handle high-load database operations
  • Improve query performance across production systems
  • Support front-end development efforts using TypeScript and React
  • Use GenAI engineering tools to enhance development workflows
  • Work both collaboratively with the team and independently on assigned tasks
  • Maintain proactive communication with team members and stakeholders
  • Own product features and contribute meaningfully beyond simply completing tickets
  • Handle ambiguity and deliver results within a fast-paced startup setting
Requirements
  • 5+ years of hands-on production experience with Python, FastAPI, and SQL
  • Strong expertise in web application development, API design, and integrations
  • Skilled in managing high-load databases and optimizing query performance
  • Some front-end experience with TypeScript and React, along with openness to full-stack work
  • Practical experience using GenAI engineering tools, Claude Code preferred
  • Excellent communication skills and a proactive mindset, comfortable working solo or as part of a team
  • Ability to navigate ambiguity and make progress independently in a transparent, fast-moving startup setting
  • English fluency at B2 level or above
Nice to have
  • Strong background in TypeScript, React, Next.js, Storybook, Playwright, Radix UI, and Zustand
  • Hands-on experience with PostgreSQL and OpenSearch
  • Knowledge of cloud platforms, Infrastructure as Code, and related tooling
  • Experience in data engineering, particularly working with PySpark and Spark SQL
  • Prior experience working directly with clients