Senior Full-Stack (WordPress + React) Developer | Hybrid in Warsaw

Digis is an international technology company, part of Fiverr (NYSE: FVRR), with 250+ specialists delivering high-load SaaS platforms, enterprise solutions, and cloud-native products for clients worldwide. We build long-term engineering teams and ensure transparency, stability, and professional growth for every talent. About The Project Large SaaS platform in the e-commerce domain that automates store operations for online sellers. The platform covers product importing, inventory and price synchronization, supplier integrations, order fulfillment automation, and marketplace management. Hybrid work model: 3 days per week in the Warsaw office Responsibilities Create new landing pages and test paid vs. free funnel modelsIntegrate payment flows, including Stripe, into new funnel experiencesDevelop and test alternative versions of existing flows for A/B testingIntegrate with Shopify and other external APIs used in the funnelSupport and extend the existing WordPress/PHP-based funnel when neededGradually migrate parts of the existing solution toward React and newer architecture What we offer Competitive compensation packageLong-term cooperation and stabilityProven product with around 10 years of successful operationStrong company backing as part of the Fiverr GroupNew team built from scratch with room to shape its ways of workingBi-weekly engineering discussions on architecture, implementation, and knowledge sharingAI-powered development supported by the client, including Claude Code for coding, refactoring, PR reviews, and Jira/Confluence tasks What we expect 5+ years of general software development experience 3+ years of hands-on experience with Wordpress1+ year of hands-on experience with ReactJSEnglish level: Upper-Intermediate or higher