Senior/Lead Full-Stack Software Engineer (Python, React, AI)

Location: Poland Why Join Exadel We’re an AI-first global tech company with 25+ years of engineering leadership, 2,000+ team members, and 500+ active projects powering Fortune 500 clients, including HBO, Microsoft, Google, and Starbucks. From AI platforms to digital transformation, we partner with enterprise leaders to build what’s next. What powers it all? Our people are ambitious, collaborative, and constantly evolving. What You’ll Do Design, develop, and deliver full-stack applications using Python, FastAPI, React, and TypeScript Build and deploy LLM-powered applications to production using RAG, prompt engineering, structured outputs, and OpenAI APIs Implement vector and hybrid search solutions and document processing for PDF, Word, and Excel files Evaluate, monitor, and improve LLM application quality using Langfuse or similar tools Develop and maintain applications on Azure, including app hosting, VMs, and authentication integrations Collaborate directly with clients, lead sessions with senior non-technical stakeholders, and communicate progress clearly Translate ambiguous business needs into practical technical solutions What You Bring Strong experience with React, TypeScript, and Python, including FastAPI or similar frameworks Proven experience delivering at least one LLM-powered application to production Hands-on experience with RAG, prompt design, structured outputs, and OpenAI APIs Experience with vector or hybrid search and parsing PDF, Word, and Excel documents Familiarity with LLM evaluation and observability tools such as Langfuse Working knowledge of Azure, including VMs, application hosting, and Entra ID / SSO Strong client-facing communication and problem-solving skills Nice to Have MCP server development or Claude / AI agent integrations Experience with PII protection, GDPR, and EU data residency, including tools such as Presidio Background in finance, private equity, or M&A due diligence English level Upper-Intermediate Legal & Hiring Information Exadel is proud to be an Equal Opportunity Employer committed to inclusion across minority, gender identity, sexual orientation, disability, age, and more. Reasonable accommodations are available to enable individuals with disabilities to perform essential functions. Please note: this job description is not exhaustive. Duties and responsibilities may evolve based on business needs. Compensation details are shared with candidates at the early stage of the recruitment process. The offer is not binding until a signed contract is in place. Your Benefits at Exadel Exadel benefits vary by location and contract type. Your recruiter will fill you in on the details. International projects In-office, hybrid, or remote flexibility Medical healthcare Recognition program Ongoing learning & reimbursement Well-being program Team events & local benefits Sports compensation Referral bonuses Top-tier equipment provision Exadel Culture We lead with trust, respect, and purpose. We believe in open dialogue, creative freedom, and mentorship that helps you grow, lead, and make a real difference. Ours is a culture where ideas are challenged, voices are heard, and your impact matters.