Senior Backend Engineer – Digital Platforms (Cloud Native / APIs)

Senior Backend Engineer – Digital Platforms (Cloud Native / APIs)

Duration: 6+ Months

Location: Remote  

Required Technical Skills

• Expert-level experience in Java and the broader Java/Spring ecosystem; ability to rapidly learn and work in Kotlin.
• Strong polyglot mindset with exposure to Node.js/Next.js for BFF development.
• Hands-on Kubernetes experience—GKE preferred, but deep K8s expertise in EKS/AKS/OpenShift accepted for Senior roles as long as the candidate can
• adapt to GS’s Harness + Terraform/Helm delivery patterns.
• Strong experience building API-first, contract-driven microservices at scale.
• Experience with event-driven systems and messaging platforms (Pub/Sub, SNS/SQS, Kafka, etc.).
• Hands-on work with cloud-native databases (Firestore/Firebase, Spanner, Cloud SQL—or AWS/DynamoDB equivalents).
• Experience in CI/CD pipelines, containerization, service observability, and performance tuning.

Core Engineering Responsibilities

• Build and enhance cloudnative microservices using Java (Spring Boot) and Kotlin as the team’s primary languages.
• Contribute to Backend-for-Frontend (BFF) patterns leveraging Node.js/Next.js where applicable to support UI and mobile integration.
• Apply APIfirst and contractfirst design principles using OpenAPI/Swagger and, where applicable, gRPC.
• Develop highly available, scalable systems that support millions of transactions across ordering, checkout, pricing, menu, and customer account domains.
• Implement resiliency patterns including retries, circuit breakers, rate limiting, and idempotency for the Async Order Flow (AOF).
• Cloud, Platform & Deployment
• Build and deploy services on Google Kubernetes Engine (GKE), working within GS standards for CI/CD using Harness and infrastructure templates via
• Terraform/Helm.
• Support two key delivery tracks:

Refactoring: Migrating existing services from legacy GKE/ASM into the new GKE Enterprise (GKEE) environment.

Greenfield: Building new GKE-native services for strangler-pattern extraction of the POBS/OLODB monolith.

Preferred Skills

• Experience with strangler-pattern migrations or domain decomposition work.
• Background supporting high-volume transactional or ecommerce systems.
• Familiarity with Vertex AI or enterprise GenAI integration is a plus (not required).