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.

Responsibilities

• Implement and support the migration of CIAM solutions from AWS Cognito to Auth0

• Develop and maintain backend services using Golang and PHP (both modern and legacy codebases)

• Contribute to frontend development using React where needed

• Work with legacy monolithic systems and support their transition to microservices architecture

• Analyze existing systems, integrations, and dependencies to identify risks and migration requirements

• Participate in technical design discussions and help shape the migration strategy

• Break down complex tasks and support planning and execution across the team

• Collaborate with cross-functional teams and communicate effectively with both technical and non-technical stakeholders

Requirements

• 5+ years of commercial experience in software development

• Strong experience with Golang and PHP (including legacy systems)

• Solid knowledge of JavaScript and hands-on experience with React

• Experience working with Auth0 or AWS Cognito (ideally both)

• Understanding of CIAM / authentication and authorization concepts

• Experience working with microservices architecture and legacy monoliths

• Proven track record in system migrations or working in complex distributed environments

• Strong analytical and problem-solving skills

• Ability to work in a fast-paced environment with tight deadlines

• Good communication skills and ability to collaborate with cross-functional teams