Backend Engineer — A2A Integration

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We're looking for a Backend Engineer — A2A Integration to join our team in Portugal in a fully remote working mode. In this role, you will contribute to building the Agent Gateway for an Enterprise Agent Development Platform – a cloud-native ecosystem enabling engineering teams to define, orchestrate, deploy, and observe AI agents at scale. You will design and implement the mechanisms for agent-to-agent (A2A) integration, including agent card registration, target configuration, API routing, and invocation patterns. The position requires strong backend engineering expertise combined with a deep understanding of async and event-driven architectures for high-scale distributed systems. Responsibilities: - Develop and maintain A2A Gateway components enabling agent discovery, registration, and interaction. - Implement Agent Card JSON schema and /.well-known/agent.json endpoints for identity and configuration publishing. - Design and integrate A2A invocation patterns, handling JSON-RPC 2.0 messaging, task lifecycle events, and push notifications. - Build and optimize high-performance APIs in Python using async frameworks and AgentCore SDK. - Implement secure and efficient communication flows for agent interactions using REST and streaming mechanisms (SSE). - Collaborate with platform and orchestration teams to validate integration correctness and performance under load. - Ensure proper observability of inter-agent workflows, promoting traceability and debugging capabilities. - Support the implementation of deployment topologies for specific gateway use cases and configurations. Requirements: - 3+ years of experience as a backend engineer working with Python or Go. - Strong background in building and integrating APIs, including routing and security considerations. - Hands-on experience implementing REST APIs and asynchronous/event-driven patterns (e.g., SSE, webhooks). - Understanding of microservice communication and integration patterns in production environments. - Familiarity with schema design and structured JSON endpoints for distributed services. Nice to have: - Experience working with AWS AgentCore Gateway and related templates. - Exposure to AWS Bedrock multi-agent invocation patterns. - Knowledge of SSE event streaming for task lifecycle handling and scalability. - Familiarity with OpenTelemetry for distributed tracing propagation across A2A agent flows.