Senior Backend Engineer
New
C
CreatorIQInfluencer Marketing
Location: Warsaw, cross-timezoneFull-TimeSenior
SalaryPLN 299K - PLN 359K
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Job Details
- Languages
- English
- Experience
- 5+ years
- Required Skills
- AWSGraphQLNode.jsPHPRESTful APIsAWS Lambda
Requirements
- 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.
- Fluency in English, written and spoken.
- Proven ability to communicate effectively in a remote, async-first environment.
Responsibilities
- Develop a deep understanding of the 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 clearly in writing and through short video walkthroughs.
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