Senior Full-stack Developer

We are looking for a Senior Full-stack Developer to join a team building a new product that leverages Python and FastAPI on the backend, React/TypeScript on the front end, with database management powered by PostgreSQL and OpenSearch. The product operates in a multi-cloud environment and makes heavy use of Databricks. Responsibilities Develop and maintain web applications using Python/FastAPI and SQLDesign APIs and integrations that support high-load database operationsOptimize query performance across production systemsContribute to front-end development using TypeScript and ReactApply GenAI engineering tools to improve development workflowsCollaborate with the team while also working autonomously on assigned tasksCommunicate proactively with team members and stakeholdersTake ownership of product features and drive meaningful contributions beyond ticket completionNavigate ambiguity and deliver results in a fast-paced startup environment Requirements 5+ years of production experience with Python, FastAPI, and SQLExpertise in web application development, API design, and integrationsProficiency in handling high-load databases and query performance optimizationFamiliarity with front-end development using TypeScript and React, with willingness to work full-stackHands-on experience with GenAI engineering tools, ideally Claude CodeStrong communication skills and proactivity, with the ability to work both independently and within a teamCapability to deal with ambiguity and get things done without constant direction in a transparent, fast-moving startup environmentEnglish proficiency at B2 level or higher Nice to have Solid experience with TypeScript, React, Next.js, Storybook, Playwright, Radix UI, and ZustandExperience with PostgreSQL and OpenSearchFamiliarity with cloud platforms, Infrastructure as Code, and related toolsBackground in data engineering, handling data with PySpark and SparkSQLClient-facing experience We offer We gather like-minded people:Top tech minds driving innovation in AI, cloud and digital platform modernizationSupportive team and agile, startup-like cultureHybrid by design mode and opportunity to work remotely within PolandChance to work abroad for up to 60 days annuallyBusiness-driven relocation opportunitiesWe provide growth opportunities:Career development programsThought leadership, mentoring, soft skills and well-being programsCertification (Anthropic, Gemini, GCP, Azure, AWS)English classesWe cover it all:Stable payParticipation in the Employee Stock Purchase Plan with a 15% discountBenefits package (health insurance, multisport, shopping vouchers)Referral bonuses up to $2,000Offices featuring entertainment and relaxation zones, table tennis and football, free snacks, coffee and moreCorporate, social and well-being eventsPlease, note:Benefits listed above are available to employees onlyWe are open for working with Contractors. Terms of B2B cooperation agreements are agreed individuallyWe 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.