Senior Full Stack Developer (Python/TypeScript)

We’re looking for a Senior Full Stack Engineer (Python/TypeScript) to join a new analytics and communication platform initiative in Poland.You’ll help design, integrate, and optimize conversational AI experiences powered by Dialogflow and Gemini (Vertex AI) - enabling seamless interaction between users and businesses across multiple digital channels. This role combines hands-on development with technical advocacy, working closely with global engineering teams to create scalable, intelligent communication solutions.Essential functionsProvide technical expertise and guidance to the engineering team, including conducting code reviews, and fostering a culture of excellence in software development practicesWrite high-quality, maintainable code for critical components, features, or modules of the software application, while also contributing to the overall codebase and enforcing coding standards and best practicesAnalyze and solve complex technical problems, including performance bottlenecks, scalability challenges, and system failures, through systematic debugging, root cause analysis, and collaboration with cross-functional teamsRefactoring and improving existing codebase to enhance maintainability, extensibility, and readability, while also identifying and addressing technical debt and legacy code issuesCreate and maintain technical documentation, including design documents, architecture diagrams, and best practices guides, to facilitate knowledge sharing, onboarding, and collaboration within the teamEnsure the overall quality and reliability of software products through rigorous testing practices, including unit tests, integration tests, and end-to-end tests, as well as promoting a culture of testing and quality assurance within the teamQualificationsProficiency in Google Cloud Platform (GCP) - including Cloud Run, Cloud Functions, App Engine, Cloud Storage, and Pub/SubWorking knowledge of Dialogflow CX/ES, webhooks, and Gemini (Vertex AI) integration for conversational experiencesHands-on experience with Node.js / TypeScript and/or PythonStrong understanding of RESTful APIs, OAuth2, and JSON-based webhooksAbility to produce clear, engaging developer documentation, such as tutorials, samples, or demo videosWould be a plusExperience with Gemini function calling, Vertex AI Studio, and prompt engineeringKnowledge of rich messaging APIs, such as RBM, WhatsApp Business, or Apple Business MessagesWe offerOpportunity to work on bleeding-edge projectsWork with a highly motivated and dedicated teamCompetitive salaryFlexible scheduleBenefits package - medical insurance, sportsCorporate social eventsProfessional development opportunitiesWell-equipped officeAbout usGrid Dynamics (NASDAQ: GDYN) is a leading provider of technology consulting, platform and product engineering, AI, and advanced analytics services. Fusing technical vision with business acumen, we solve the most pressing technical challenges and enable positive business outcomes for enterprise companies undergoing business transformation. A key differentiator for Grid Dynamics is our 8 years of experience and leadership in enterprise AI, supported by profound expertise and ongoing investment in data, analytics, cloud & DevOps, application modernization and customer experience. Founded in 2006, Grid Dynamics is headquartered in Silicon Valley with offices across the Americas, Europe, and India.