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Senior Full-stack Developer (PostgreSQL, OpenSearch, Databricks)

Remote in Poland
Python.Web& 14 others
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We are building a new product across multiple clouds and are hiring a Senior Full-stack Developer to ship Python/FastAPI backend and React/TypeScript front-end features. You will work with PostgreSQL, OpenSearch, and Databricks while improving integrations and performance. Apply now.

Responsibilities
  • Implement and maintain web applications with Python/FastAPI and SQL
  • Create APIs and integrations that support high-load database operations
  • Analyze and optimize query performance across production systems
  • Build front-end components using TypeScript and React
  • Adopt GenAI engineering tools to improve development workflows
  • Collaborate with the team while progressing autonomously on your assignments
  • Communicate proactively with team members and stakeholders
  • Own product features and drive impact beyond ticket completion
  • Deliver results while navigating ambiguity in a fast-paced startup environment
Requirements
  • Proven 5+ years of production experience with Python, FastAPI, and SQL
  • Comprehensive expertise in web apps, API design, and integration development
  • Strong capability in high-load database handling and query performance optimization
  • Experience with TypeScript and React, plus willingness to work full-stack
  • Hands-on exposure to GenAI engineering tools, ideally Claude Code
  • Effective communication skills and proactive execution, able to operate independently and as part of a team
  • Ability to deal with ambiguity and deliver without constant direction in a transparent, fast-moving startup environment
  • English proficiency at B2 (Upper-Intermediate) 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 with PySpark and SparkSQL
  • Client-facing experience