Senior Backend Engineer at Creator IQ in Warsaw

Job description

CreatorIQ is the operating system for creator-led growth trusted by more than 1,300 global brands and agencies. We’re on a mission to make businesses more human, and humans more impactful. We operate by our values — be intentional, pursue excellence every day, embrace the journey together, and be a good human — every day. CreatorIQ has earned the title of best companies to work for in multiple programs, including BuiltIn LA and NY. It’s been named a Fastest-Growing Company in North America on the Deloitte Technology Fast 500™ for four years, was named a leader in IDC MarketScape: Worldwide Influencer Marketing Platforms for Large Enterprises in 2025, was named a Leader by The Forrester New Wave™: Influencer Marketing Solutions, and has been consistently recognized by G2 as a Leader, and is rated 5 stars on Influencer MarketingHub. We operate in a flexible work model that combines both in-person and remote work to boost collaboration, enhance innovation, and adapt to individual work styles. We're seeking passionate, innovative minds to join our journey. Be a part of our dynamic team and let's transform the industry together! Senior Backend Engineer Employment Type: Employment contract We're looking for a Senior Backend Engineer with deep PHP expertise and strong Node.js skills to join the Enterprise API and Platform API Team as we modernize and scale CreatorIQ's backend systems. This is a new, hands-on role focused on evolving a large PHP monolith into modular, service-oriented components while raising the bar for code quality, testing, and reliability. You'll work in a remote-first, globally distributed team, partnering closely with product, platform, and engineering colleagues, and your technical ownership and architectural thinking will directly shape how our platform scales. In this role, you’ll get to: • Develop a deep understanding of our existing PHP monolithic codebase and progressively extract it into modular, service-oriented components. • Design, build, and maintain scalable, testable, and reusable backend services in PHP and Node.js. • Design and maintain robust RESTful and GraphQL APIs. • Lead refactoring efforts that improve performance, readability, and long-term maintainability of core systems. • Build, deploy, and operate services on AWS, including Lambda and API Gateway. • Write and maintain unit and integration tests to ensure reliability across releases. • Critically review, validate, and improve AI-generated code rather than accepting it at face value. • Identify technical risks, bottlenecks, and opportunities for improvement across the platform. • Communicate technical decisions and trade-offs clearly in writing and through short video walkthroughs, and collaborate effectively across a remote, async-first, cross-timezone team Who you are and what you’ll need for this position: • 5+ years of professional backend engineering experience • Expert-level PHP experience, including direct work on enterprise-grade, production systems. • Strong backend experience with Node.js. • Hands-on experience refactoring or decomposing monolithic architectures into modular services. • Strong background in API design (REST and GraphQL) and backend architecture. • Experience with AWS, particularly Lambda and serverless patterns. • Experience writing testable code and maintaining automated test suites. • Experience using AI coding tools (e.g., GitHub Copilot, ChatGPT, Claude Code, Cursor) within IDEs such as VS Code or PhpStorm, including critically reviewing and refining AI-generated code. • Fluency in English, written and spoken. • Highly proactive and self-directed, with a proven ability to communicate effectively and unblock yourself in a remote, async-first environment. Confidence can sometimes hold us back from applying for a job. But we'll let you in on a secret: there's no such thing as a 'perfect' candidate. Have 50% of the criteria? Excited about this opportunity? Passionate about what we do at CreatorIQ? Please apply!