Senior Backend Engineer (Remote, Any Location, ES)

About Us

Foundever™ is a global leader in the customer experience (CX) industry. With 170,000 associates across the globe, we are the team behind the best experiences for +750 of the world’s leading and digital-first brands. Our innovative CX solutions, technology, and expertise are designed to support operational needs for our clients and deliver a seamless experience to customers in the moments that matter.   

About the Role

We are seeking a Senior Back-End Software Developer to join our Common Tools team. The team is responsible for building and maintaining shared technical foundations used across multiple product teams, including developer-ready templates, reusable Python libraries, and a set of shared microservices.

What You'll Do

Developer Templates & Enablement

• Build and maintain production-ready service templates enabling teams to quickly create new backend services.
• Ensure templates include standard structure, testing, CI/CD, security, and observability out of the box.
• Keep templates aligned with internal standards and continuously improve them based on team feedback.

Shared Microservices & Components

• Design and develop shared microservices using Python and FastAPI.
• Build reusable Python libraries consumed by multiple services.
• Use FastAPI features to define, validate, and expose consistent, well-structured APIs.
• Manage database migrations using Alembic.
• Contribute to shared coding standards and code reviews.

Quality, Testing & Observability

• Enforce high engineering standards across templates, services, and libraries.
• Implement robust testing strategies (unit, integration, system).
• Ensure services expose metrics, logs, and traces for production monitoring.
• Apply security best practices, with strong knowledge of OAuth2, OpenID Connect (OIDC).
• Build reliability, performance, and operational readiness by default.

What We're Looking For

Must-Have

• Strong professional experience with Python (minimum 5 years).
• Proven experience building production APIs with FastAPI.
• Solid experience with Alembic for database migrations.
• Strong understanding of software quality practices, including automated testing and clean code principles.
• Hands-on experience implementing metrics, logging, and tracing in production systems.
• Strong knowledge of backend security concepts, including OAuth2, OpenID Connect (OIDC), and secure service-to-service communication.
• Solid experience using GitLab for version control and CI/CD.
• Strong communication and collaboration skills.
• Fluent in both written and spoken English

Nice-to-Have

• Experience building and maintaining reusable Python libraries is a strong plus.
• Familiarity with Kubernetes and Helm
• Experience designing and maintaining developer templates or internal tooling is a strong plus.
• Experience with Docker and container-based deployments.

Technical Environment

• Languages & Frameworks: Python, FastAPI
• Database & Migrations: Alembic
• Security: OAuth2, OpenID Connect (OIDC)
• Testing & Observability: pytest, Testcontainers, Prometheus, Grafana, OpenTelemetry
• CI/CD & DevOps: GitLab, ArgoCD, Helm, Harbor, Kubernetes (EKS)
• Infrastructure: AWS (EKS, RDS, S3, etc.)