We’re currently looking for a Senior Backend Engineer with strong PHP expertise and solid Node.js experience to join the Enterprise API & Platform API Team. This is a hands-on engineering role focused on modernizing and scaling a large PHP-based backend. You’ll have the opportunity to work on the evolution of a monolithic architecture into more modular, service-oriented components while improving code quality, testing, performance, and reliability. You’ll work in a remote-first, globally distributed team, collaborating closely with Product, Platform, and Engineering teams.

Your technical decisions and architectural thinking will have a direct impact on how the platform evolves and scales.

Employment Type: UoP Location: Warsaw | Remote WHAT YOU’LL DO: - Develop a deep understanding of an existing PHP monolithic codebase and progressively extract functionality into modular, service-oriented components. - Design, build, and maintain scalable, testable, and reusable backend services using PHP and Node.js. - Design and maintain robust RESTful and GraphQL APIs. - Lead and contribute to refactoring initiatives focused on performance, readability, maintainability, and scalability. - Build, deploy, and operate backend services on AWS, including Lambda and API Gateway. - Write and maintain unit and integration tests to ensure reliability across releases. - Use AI coding tools effectively while critically reviewing, validating, and improving AI-generated code. - Identify technical risks, performance bottlenecks, and opportunities for improvement across the platform. - Clearly communicate technical decisions and trade-offs through documentation and short video walkthroughs. - Collaborate effectively within a remote, async-first, cross-timezone environment.

WHAT WE’RE LOOKING FOR: - 5+ years of professional backend engineering experience. - Expert-level PHP experience, including work on enterprise-grade production systems. - Strong hands-on experience with Node.js. - Experience refactoring or decomposing monolithic architectures into modular services. - Strong knowledge of backend architecture and API design, including REST and GraphQL. - Hands-on experience with AWS, particularly Lambda and serverless architectures. - Experience writing testable code and maintaining automated test suites. - Experience with AI-assisted development tools such as GitHub Copilot, ChatGPT, Claude Code, or Cursor, with the ability to critically review and refine generated code. - Strong written and spoken English. - A proactive, self-directed approach and the ability to work independently, communicate clearly, and unblock yourself in a remote environment.

WHAT YOU’LL GET - Great people — a talented, collaborative, and friendly international team. - Learning & development — access to training and learning resources to support your growth. - 26 days of vacation plus floating and company holidays. - Wellness & work-life balance — wellness benefits and paid parental leave. - Comprehensive insurance package covering medical, life, and business travel. - PPK — participation in Poland’s Employee Capital Plan. - Equity — stock options as part of the company’s equity-sharing program. - Work-from-home stipend to help you create a comfortable home office.

IF THIS SOUNDS LIKE YOUR NEXT CHALLENGE, FEEL FREE TO APPLY!