Senior Full-stack Developer (Databricks, Python/FastAPI)

Required skills: Python, fastapi, SQL, Databricks, PostgreSQL, React, TypeScript We are developing a new multi-cloud platform and want a Senior Full-stack Developer to build reliable Python/FastAPI APIs and React/TypeScript experiences. You will work with PostgreSQL, OpenSearch, and Databricks, focusing on integrations and performance. Apply now. Responsibilities Deliver and maintain web applications built with Python/FastAPI and SQL Plan and design APIs and integrations that support high-load database operations Optimize query performance across live production systems Contribute UI functionality using TypeScript and React Use GenAI engineering tools to improve development workflows and throughput Collaborate closely with the team while executing autonomously on assigned tasks Communicate proactively with team members and stakeholders Take full ownership of product features and contribute beyond ticket completion Handle ambiguity and consistently deliver in a fast-paced startup environment Requirements 5+ years of real-world production experience with Python, FastAPI, and SQL Solid background in web application delivery, API design, and system integrations Proficiency with high-load databases and query performance optimization techniques Ability to contribute on the front end using TypeScript and React while staying effective full-stack Experience using GenAI engineering tools, ideally Claude Code Strong interpersonal communication and proactive collaboration skills, with ability to work independently Capability to succeed amid 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 Hands-on skills with TypeScript, React, Next.js, Storybook, Playwright, Radix UI, and Zustand Experience with PostgreSQL and OpenSearch in production contexts Familiarity with cloud platforms, Infrastructure as Code, and adjacent tooling Data engineering exposure, including 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 We are open for working with Contractors. Terms of B2B cooperation agreements are agreed individually We will reach out to selected candidates exclusively EPAM is global leader in AI transformation engineering and integrated consulting, serving Forbes Global 2000 companies and ambitious startups. With over thirty years of expertise in custom software, product and platform engineering, we empower our clients to become AI-Native enterprises, driving measurable value from innovation and digital investments.