Senior Fullstack Developer

We are looking for a Senior Fullstack Developer for our client, based in Kraków and surrounding areas. The project involves developing a large-scale communication platform in the travel industry that generates traveler documents and delivers time-critical notifications via email and SMS (over 1 million emails and approximately 100,000 SMS messages daily).The system is responsible for informing travelers about schedule changes, web check-in availability, and flight status (from 24 hours before departure up to the departure time), as well as collecting post-trip feedback.Deliver end‑to‑end features across Java/Spring Boot services and React/TypeScript front‑ends.Design clean APIs and data contracts; implement event‑driven integrations and resilient error handling.Own quality with automated tests at multiple layers and contribute to CI/CD pipelines.Collaborate closely with Product/Design to iterate quickly from discovery to production.Proficiency in Java and React/TypeScript with solid understanding of distributed systems and web fundamentals.Experience with REST, messaging (e.g., Kafka), SQL/NoSQL and containerized deployments.Google GCP experience.Pragmatic testing mindset and effective code review habits.Nice to haveExposure to email/SMS deliverability and localization at scale.Experience building internal admin tooling and dashboardsMust possess a legal work permit in Poland General benefits - depends on the form of employment Hybrid work model combining office & remote work Attractively located office with collaboration spacesOnsite parking space for employees Referral program with financial bonus Life Insurance Budget for development (including language courses and others), clear career path with the possibility to gain experience in international environment Access to internal Learning Platform with multiple trainings oriented for professional growth Lifestyle benefits: Access to MyBenefit platform (Multisport included)Team Building activities Charity initiatives Working environment promoting diversity and inclusion Health benefits: Private medical care - Platinum Package