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Senior Full-stack Developer, Python/FastAPI, React & SQL

Remote in Poland
Python.Web& 14 others
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We are launching a new multi-cloud product and need a Senior Full-stack Developer to own full-stack delivery from Python/FastAPI APIs to React/TypeScript UI. You will optimize PostgreSQL and OpenSearch performance and collaborate in a Databricks-heavy environment. Apply today.

Responsibilities
  • Develop and enhance web applications using Python/FastAPI and SQL
  • Define and implement APIs and integrations that support high-load database operations
  • Optimize and troubleshoot query performance in production systems
  • Deliver front-end work using TypeScript and React
  • Incorporate GenAI engineering tools to improve development workflows
  • Work collaboratively while independently owning assigned tasks
  • Maintain proactive communication with stakeholders and teammates
  • Own features end to end and contribute beyond ticket completion
  • Execute effectively through ambiguity in a fast-paced startup environment
Requirements
  • Demonstrated 5+ years of production delivery with Python, FastAPI, and SQL
  • Advanced knowledge of web application development, API design, and integration work
  • Hands-on ability to operate high-load databases and optimize query performance
  • Familiarity with TypeScript and React and willingness to work across the full stack
  • Practical experience with GenAI engineering tools, ideally Claude Code
  • Strong communication abilities and proactive ownership, comfortable working solo and with a team
  • Track record of navigating ambiguity and shipping without constant direction in a transparent, fast-moving startup environment
  • English proficiency at B2 (Upper-Intermediate) level or higher
Nice to have
  • Experience with TypeScript, React, Next.js, Storybook, Playwright, Radix UI, and Zustand
  • Experience working with PostgreSQL and OpenSearch
  • Knowledge of cloud platforms, Infrastructure as Code, and related tools
  • Data engineering experience using PySpark and SparkSQL
  • Client-facing experience