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Senior Full-stack Developer

Remote in Poland
Python.Web& 14 others
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We are looking for a Senior Full-stack Developer to join a team building a new product that leverages Python and FastAPI on the backend, React/TypeScript on the front end, with database management powered by PostgreSQL and OpenSearch. The product operates in a multi-cloud environment and makes heavy use of Databricks.

Responsibilities
  • Develop and maintain web applications using Python/FastAPI and SQL
  • Design APIs and integrations that support high-load database operations
  • Optimize query performance across production systems
  • Contribute to front-end development using TypeScript and React
  • Apply GenAI engineering tools to improve development workflows
  • Collaborate with the team while also working autonomously on assigned tasks
  • Communicate proactively with team members and stakeholders
  • Take ownership of product features and drive meaningful contributions beyond ticket completion
  • Navigate ambiguity and deliver results in a fast-paced startup environment
Requirements
  • 5+ years of production experience with Python, FastAPI, and SQL
  • Expertise in web application development, API design, and integrations
  • Proficiency in handling high-load databases and query performance optimization
  • Familiarity with front-end development using TypeScript and React, with willingness to work full-stack
  • Hands-on experience with GenAI engineering tools, ideally Claude Code
  • Strong communication skills and proactivity, with the ability to work both independently and within a team
  • Capability to deal with ambiguity and get things done without constant direction in a transparent, fast-moving startup environment
  • English proficiency at B2 level or higher
Nice to have
  • Solid experience with TypeScript, React, Next.js, Storybook, Playwright, Radix UI, and Zustand
  • Experience with PostgreSQL and OpenSearch
  • Familiarity with cloud platforms, Infrastructure as Code, and related tools
  • Background in data engineering, handling data with PySpark and SparkSQL
  • Client-facing experience