Senior Developer (Contentful)

Overview

Senior Developer to support the migration of an enterprise digital platform from Sitecore to Contentful, combining content migration, application migration, React/TypeScript development, API integrations and headless architecture, with an AI-first, spec-driven approach to development.

What you'll do

• Migrate and modernise existing Sitecore-backed applications to work with Contentful.
• Develop, refactor and enhance frontend applications using React and TypeScript.
• Replace Sitecore-specific dependencies, components and integrations with Contentful-compatible solutions.
• Develop content migration tooling, scripts and automated transformation processes.
• Implement Contentful content models, API integrations and content delivery patterns.
• Ensure migrated applications maintain functionality, performance, accessibility and quality.
• Adopt an AI-first mindset, proactively identifying opportunities to accelerate development, migration and problem-solving using AI.
• Apply spec-driven development, using clear technical specifications, acceptance criteria and tests to guide AI-assisted implementation.
• Leverage AI to support Sitecore analysis, schema mapping, migration script generation, application refactoring and validation.
• Use AI coding assistants effectively while reviewing, testing and taking accountability for generated outputs.
• Share AI-enabled development practices and contribute to improving team productivity.
• Independently own complex development tasks and significant migration components.
• Write clean, maintainable, well-tested code and contribute to CI/CD and automated testing.
• Identify technical risks, dependencies and opportunities for improvement.
• Collaborate with Lead Developers, architects, QA and content teams.
• Support less experienced developers through mentoring, code reviews and knowledge sharing.

What you'll need

• Strong commercial software engineering experience, particularly with React and TypeScript.
• Experience migrating, modernising or refactoring existing frontend applications.
• Practical experience with headless CMS platforms, preferably Contentful, and an understanding of Sitecore.
• Strong understanding of APIs, integration patterns and content modelling.
• Experience with backend development, migration scripting or data transformation.
• Practical experience using AI-assisted development tools and an understanding of spec-driven development approaches.
• Experience with automated testing, CI/CD and modern engineering practices.
• Ability to work independently, solve complex problems and influence technical implementation decisions.

Nice to have

• Direct experience migrating Sitecore applications and content to Contentful.
• Experience with Next.js, Sitecore JSS or CMS/DXP replatforming.
• Experience applying AI to content analysis, migration automation, code transformation or test generation.
• Experience with multilingual, multisite or composable digital platforms.

Details

• Location: Poland.
• Work mode: Remote and hybrid options (country-dependent).