Senior Full Stack Software Engineer

We are looking for a Senior Software Engineer to join an international project focused on migrating a Customer Identity and Access Management (CIAM) solution from AWS Cognito to Auth0. This role combines hands-on engineering work with architectural involvement in a complex, high-impact environment.ResponsibilitiesImplement and support the migration of CIAM solutions from AWS Cognito to Auth0Develop and maintain backend services using Golang and PHP (both modern and legacy codebases)Contribute to frontend development using React where neededWork with legacy monolithic systems and support their transition to microservices architectureAnalyze existing systems, integrations, and dependencies to identify risks and migration requirementsParticipate in technical design discussions and help shape the migration strategyBreak down complex tasks and support planning and execution across the teamCollaborate with cross-functional teams and communicate effectively with both technical and non-technical stakeholders Requirements5+ years of commercial experience in software developmentStrong experience with Golang and PHP (including legacy systems)Solid knowledge of JavaScript and hands-on experience with ReactExperience working with Auth0 or AWS Cognito (ideally both)Understanding of CIAM / authentication and authorization conceptsExperience working with microservices architecture and legacy monolithsProven track record in system migrations or working in complex distributed environmentsStrong analytical and problem-solving skillsAbility to work in a fast-paced environment with tight deadlinesGood communication skills and ability to collaborate with cross-functional teams