Senior Full Stack Software Engineer (React & Python)

Job Location

BUCHAREST OFFICE

Job Description

The Senior Full Stack Software Engineer is a technical leader who architects, builds, 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. Beyond shipping features, this role sets technical direction, defines reusable patterns, raises the engineering bar through mentorship and code review, and partners with architects and product leadership to shape the platform roadmap. The role supports the Social Digital Products space and acts as a go-to technical authority across the full stack.

Key Responsibilities

- Lead the design and delivery of complex, full-stack capabilities end-to-end — from the Next.js UI through FastAPI microservices to Cloud Spanner / BigQuery data stores — owning architecture, trade-offs, and outcomes.

- Set technical direction for the Next.js (App Router) front-end (TypeScript, React 18+, Tailwind CSS), championing the Backend-for-Frontend (BFF) pattern and a clean separation between server and client components; establish front-end standards, component libraries, and performance budgets.

- Architect and operate Python 3.11 / FastAPI microservices using the service–repository pattern, Pydantic v2 schemas, SQLAlchemy 2.0+, dependency injection, and async patterns, exposing well-designed REST and GraphQL APIs.

- Drive the strategy for integrating GenAI / LLM capabilities into the platform — using Vertex AI (Gemini), OpenAI / Anthropic, and LangChain / LangGraph via P&G's governed GenAI gateway — including prompt design, evaluation, guardrails, and cost/latency optimization.

- Design, build, and operate GCP services (Cloud Run, Cloud Workflows, Cloud Build, Pub/Sub, Secret Manager, Cloud Logging) and lead the platform's evolution toward reusable, self-serve, well-governed patterns.

- Own data integration with BigQuery and Cloud Spanner for transactional and analytical workloads — applying parameterized queries, partitioning, clustering, and cost-aware design — and support embedded Looker / LookML reporting.

- Lead the design and hardening of integrations with social platforms, third-party influencer marketplaces, web-scraping / content-extraction pipelines, and internal P&G systems, ensuring resilience, observability, and maintainability.

- Design and extend Terraform modules for GCP project and landing-zone resources, advancing self-serve provisioning, policy guardrails, and infrastructure-as-code best practices.

- Embed quality and security into CI/CD and hold the team to it: unit and integration tests (pytest, jest), E2E tests (Playwright), SonarQube, Snyk, and gitleaks; define testing strategy and coverage expectations.

- Mentor and grow mid-level and junior engineers through pairing, design guidance, and thorough code reviews; foster a culture of engineering excellence and knowledge sharing.

- Partner closely with product managers, business analysts, architects, and QA to shape requirements, translate architecture blueprints into delivery plans, and ensure technical solutions are fit for use and aligned with the long-term vision.

- Proactively identify, design, and lead performance, reliability, and cost-reduction initiatives, and uphold coding standards and best practices so services and components stay efficient, secure, scalable, and reusable.

Job Qualifications

- Bachelor's degree in Computer Science or a related field (or equivalent practical experience).

- Extensive experience in full-stack software engineering and web application development, including a proven track record of leading the design and delivery of production systems end-to-end.

- Deep expertise with modern web architectures and microservice design patterns, and the ability to make and justify architecture-level decisions.

- Expert, hands-on proficiency with TypeScript, React 18+, and Next.js App Router (server/client components, route handlers, BFF pattern).

- Expert, hands-on proficiency with Python 3.11+ and FastAPI, including Pydantic, SQLAlchemy, and async patterns.

- Strong, applied knowledge of GCP (Cloud Run, Cloud Workflows, BigQuery, Cloud Spanner, IAM, Secret Manager) and Terraform, with experience operating services in production.

- Demonstrated experience integrating GenAI / LLM services — e.g. Vertex AI / Gemini, OpenAI, Anthropic, LangChain / LangGraph — into production applications, including evaluation, guardrails, and cost management.

- Solid experience with Docker and containerized local development and deployment.

- Advanced TypeScript, Python, and SQL skills.

- Proven experience defining test strategy and writing automated tests (pytest, jest, Playwright), and integrating quality and security tooling (SonarQube, Snyk, gitleaks) into CI/CD pipelines.

- Strong command of REST and GraphQL API design, OpenAPI/Swagger, and conventional commits.

- Strong working knowledge of the OWASP Top 10 and secure coding practices (no hardcoded secrets, input validation, parameterized queries, HTTPS-only), with the ability to guide others in applying them.

- Demonstrated ability to mentor engineers, lead code reviews, and drive technical standards across a team.

- Excellent communication and collaboration skills, with the ability to influence cross-functional stakeholders and clearly articulate technical trade-offs.

- Nice to have: embedded analytics with Looker / LookML; experience with Redux Toolkit and enterprise data grids; experience contributing to platform / self-serve tooling used by other teams.

Preferred Certifications

- Professional Cloud Developer – Google Cloud Platform (GCP)

- Professional Cloud Architect – GCP

- Associate Cloud Engineer – GCP

- HashiCorp Certified: Terraform Associate

- Microsoft Certified: Azure Developer Associate (AZ-204)

Becoming part of P&G, you will benefit of:

• •Competitive salary package, annual bonus and vacation bonus
• •Private medical insurance & life insurance & 24 Hours Accident Insurance
• •Stock Ownership Plan - You have the opportunity to buy P&G shares quoted on the New York Stock Exchange to participate in the profits of the Company and the company will match part of the investments
• •Flexible working schedule & Hybrid Work from Home/Work from Office option
• •Meal allowance of 40 lei / worked day and access to our private canteen
• •Flex Benefits Fund allows employees to customize their benefits according to their unique situations, aspirations, and life stages. You can allocate flexibly for your Mental, Financial, Physical, and Work-Life Wellbeing (e.g., sports, dental, public transportation support, cultural events, books & study materials, kids care expenses, pet care, etc)
• •Access to a variety of learning and development internal platforms
• •Fresh fruits every day in the office
• •Purchase of company products option at reduced prices
• •Additional bridge days off offered by the company (up to 3 days per year)
• •Employee Assistance Program – confidential expert guidance and specialist support on any work, wellbeing, emotional, financial, physical or family issue.

The above benefits are granted under the conditions of the collective labor agreement applicable, and P&G internal policies.

• About Us
• We produce globally recognized brands, and we grow the best business leaders in the industry. We leverage innovation and technology to power our globally unique marketing strategies and recognized supply chain. We serve consumers around the word with trusted, quality, leadership brands, including Always®, Ariel®, Gillette®, Head & Shoulders®, Herbal Essences®, Oral-B®, Pampers®, Pantene®, Tampax® and more. Our community includes operations in approximately 70 countries worldwide.

This role is part of our Bucharest Innovation Hub, find out more by visiting https://www.pgcareers.com/eu/en/see-tech-hub

At Procter & Gamble, we embrace a hybrid work model that combines the flexibility of re