Lead Full-stack Developer w Poland, Kraków

We're seeking a Lead Full-stack Developer to help build a new product powered by Python and FastAPI on the backend, React/TypeScript on the frontend, and PostgreSQL and OpenSearch for database management. This product runs in a multi-cloud setup and relies extensively on Databricks. Responsibilities Build and maintain web applications leveraging Python/FastAPI and SQLArchitect APIs and integrations capable of supporting demanding database workloadsImprove query performance throughout production environmentsSupport front-end work involving TypeScript and ReactUtilize GenAI engineering tools to streamline development processesWork both collaboratively and independently on assigned responsibilitiesMaintain proactive communication with teammates and stakeholdersOwn product features and go beyond simply closing tickets to make meaningful contributionsHandle ambiguous situations and produce results within a fast-paced startup setting Requirements Minimum of 7 years working in production with Python, FastAPI, and SQLStrong background in building web applications, designing APIs, and creating integrationsSkilled at managing high-load databases and enhancing query performanceSome exposure to TypeScript and React front-end work, along with openness to full-stack responsibilitiesPractical experience using GenAI engineering tools, Claude Code experience preferredExcellent communication abilities and self-motivation, with comfort working solo or as part of a teamAbility to navigate uncertainty and execute tasks independently in an open, rapidly evolving startupEnglish language skills at B2 level or above Nice to have Strong familiarity with TypeScript, React, https://jobeax.com/link/Z30sZYC3jcRenVso, Storybook, Playwright, Radix UI, and ZustandBackground working with PostgreSQL and OpenSearchKnowledge of cloud platforms, Infrastructure as Code, and associated toolingData engineering exposure, particularly with PySpark and Spark SQLPrior experience interacting directly with clients 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.