FullStackSoftwareEngineer(React&Python)

**Job Location** BUCHAREST OFFICE **Job Description** The Full Stack Software Engineer designs, develops, and operates cloud-based web applications, APIs, and services on GCP that power our Key Opinion Leader (KOL) / influencer marketing platform across the end-to-end campaign lifecycle — partner discovery, contract automation, campaign execution, content pre-publish checks, brand-safety analysis, and post-publish performance reporting. The role supports the Social Digital Products space. **Key Responsibilities** * Build and ship full-stack features end-to-end, from Next.js UI through FastAPI microservices to Cloud Spanner / BigQuery data stores. * Develop and maintain the Next.js 13 App Router front-end (TypeScript, Tailwind CSS) following the Backend-for-Frontend (BFF) pattern, with clear separation between server and client components. * Develop and operate Python 3.11 / FastAPI microservices using the service–repository pattern, Pydantic v2 schemas, SQLAlchemy 2.0+, and dependency injection. * Partner with product managers, business analysts, architects, and QA to ensure technical solutions are fit for use and aligned with architecture blueprints. * Build and operate GCP services (Cloud Run, Cloud Workflows, Cloud Build, Pub/Sub, Secret Manager, Cloud Logging) and contribute to the evolution of the platform toward reusable, self-serve patterns. * Integrate with BigQuery and Cloud Spanner for transactional and analytical workloads, applying parameterized queries, partitioning, and cost-aware design. * Maintain and improve integrations with social platforms, third-party influencer marketplaces, and internal P&G systems. * Develop and extend Terraform modules for GCP project and landing-zone resources, contributing to self-serve provisioning and policy guardrails. * Embed quality and security into CI/CD: unit and integration tests (pytest, jest), E2E tests (Playwright), SonarQube, Snyk, and gitleaks. * Identify, design, and implement performance, reliability, and c