Senior Full-stack Developer

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

We offer

• Top tech minds driving innovation in AI, cloud, and digital platform modernization
• Supportive team and agile, startup-like culture
• Hybrid-by-design mode and opportunity to work remotely within Poland
• Chance to work abroad for up to 60 days annually
• Business-driven relocation opportunities
• Career development programs
• Thought leadership, mentoring, soft skills, and well-being programs
• Certification: Anthropic, Gemini, GCP, Azure, AWS
• English classes
• Stable pay
• Participation in the Employee Stock Purchase Plan with a 15% discount
• Benefits package: health insurance, multisport, and shopping vouchers
• Referral bonuses up to $2,000
• Offices featuring entertainment and relaxation zones, table tennis and football, free snacks, coffee, and more
• Corporate, social, and well-being events

Please note

• Benefits listed above are available to employees only.
• B2B contractor cooperation is available; terms are agreed individually.
• Only selected candidates will be contacted.