Senior Software Engineer (Node & React, Headless API)

This position is listed on behalf of a partner company, who manages all applications and next steps. Our partner is looking for a Senior Software Engineer (Node & React, Headless API) based in Romania. This is a senior engineering opportunity for an experienced individual contributor who wants to have substantial ownership over a stable, developer-first SaaS platform. You will work hands-on across backend and frontend technologies while shaping APIs, architecture, integrations, and core product capabilities. The role combines daily coding with technical leadership, pragmatic architectural decisions, and close collaboration with business and product stakeholders. You will help expand a headless API platform that enables developers to integrate social media capabilities across multiple networks. Your early impact will include launching a new advertising integration, connecting the platform with emerging AI development tools, and strengthening the core platform. You will join a small, experienced, remote-first engineering team where autonomy, speed, quality, and reliability are highly valued. This is an ideal role for a senior engineer who enjoys solving complex technical problems, influencing architecture, and delivering meaningful production-ready features.