Principal Full-Stack Engineer
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XcelirateSoftware Development
London, England, United Kingdom. Amsterdam, North Holland, Netherlands. Berlin, Berlin, Germany. Paris, Île-de-France, FranceContractPrincipal
Salary139,000 EUR per year
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Job Details
- Experience
- 15+ years
- Required Skills
- AWSDockerPHPJavascriptVue.JsSymfonyReactCI/CDTerraformAnsible
Requirements
- 15+ years hands-on experience building and maintaining complex web applications
- Clear technical communication; able to explain and defend design decisions
- Expert PHP developer (12+ years); Symfony or equivalent frameworks
- 10+ years modern JavaScript; React or Vue (Next/Nuxt a plus)
- Expert level knowledge in at least one more programming language (Python a plus)
- Full-stack architecture expertise: monoliths, services, and hybrids
- Power user cloud deployment and scaling (AWS preferred)
- Expert Linux user; containerized workflows with Docker
- Expert in infrastructure automation: Terraform, Ansible
- Power user level CI/CD pipeline and release workflow ownership
- Experience in automated testing: unit, integration, E2E; TDD
- Expert level knowledge in web security fundamentals: auth, authorization, data protection
Responsibilities
- Manage your own time while adhering to priorities set by the company.
- Own complex engineering problems end-to-end, from problem framing and design through to delivery and iteration.
- Take responsibility for critical areas of the platform, ensuring they remain reliable, performant, and maintainable.
- Build new features and improve existing ones across our platforms.
- Refactor legacy and modern codebases pragmatically, balancing long-term health with delivery needs.
- Write tests (unit, integration, and end-to-end) to ensure software reliability.
- Be involved in every phase of the software lifecycle, from ideation to deployment.
- Participate in (and at times lead) deep technical discussions, helping drive sound decisions and trade-offs.
- Work hands-on across backend and frontend systems, stepping in wherever the problem lives.
- Identify inefficiencies and help streamline workflows, reducing unnecessary work.
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