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

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.

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

We offer

We gather like-minded people:

• 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

We provide growth opportunities:

• Career development programs
• Thought leadership, mentoring, soft skills and well-being programs
• Certification (Anthropic, Gemini, GCP, Azure, AWS)
• English classes

We cover it all:

• Stable pay
• Participation in the Employee Stock Purchase Plan with a 15% discount
• Benefits package (health insurance, multisport, 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
• Contractors are welcome; terms of B2B cooperation agreements are agreed individually
• Only selected candidates will be contacted