Backend Engineer — A2A Integration

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  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.

• 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 Agent Core 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

• 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 Agent Core 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 Open Telemetry for distributed tracing propagation across A2A agent flows