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 Hybrid‑by‑design work 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 opportunities: Anthropic, Gemini, GCP, Azure, and AWS English classes

Stable pay

Participation in the Employee Stock Purchase Plan with a 15% discount

Benefits package including health insurance, multisport, and shopping vouchers

Referral bonuses up to $2,000

Offices with entertainment and relaxation zones, table tennis and football, free snacks, coffee, and more Corporate, social, and well‑being events

Please note Listed benefits are available to employees only. Contractor collaboration is available; B2B agreement terms are agreed individually. Only selected candidates will be contacted.