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

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 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 applications, 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; ability 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

• 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 opportunities in 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.

Benefits listed above are available to employees only.

Contractor cooperation is available; terms of B2B cooperation agreements are agreed individually.

Only selected candidates will be contacted.