We are seeking an experienced Senior API Developer to join our growing API team. In this role, you will be part of our API Incubation team responsible for prototyping and delivering production-grade API solutions-from design through deployment and operational support. These APIs will interface with new and/or existing infrastructure and services, including APIs that expose AI/LLM capabilities (RAG, agents, and model orchestration) and data-focused applications.

What you will do :

- Design, build, integrate, test, deploy, and support scalable APIs using our API Platform, API Style Guide, and underlying infrastructure.

- Partner with business stakeholders and clients to translate business needs into clear technical requirements and high-quality API solutions.

- Collaborate with product managers, engineers, data scientists, and security to evaluate requirements, conduct feasibility assessments, analyze existing components, and develop integration plans.

- Employ an iterative approach to capability development that incorporates requirements refinement, user feedback, lessons learned, and other inputs.

- Create level-of-effort estimates, define task breakdowns, and drive delivery across milestones.

- Build strong partnerships across application, business, and infrastructure teams to ensure solutions are scalable and operationally sound.

- Create and maintain partner enablement assets, such as API guides and packages (e.g., Postman collections) for new feature launches.

- Create, update, and maintain external API documentation on our developer site.

- Apply an operational mindset, including SLOs, incident response readiness, cost/performance optimization, and security-by-design.

Ideal candidate will have :

- Strong experience with API platforms, REST APIs, SDKs, HTTP, OAuth2/OIDC, and OpenAPI 3.0.

- Experience with microservices, PaaS, high availability cloud environments (Azure and/or GCP), and Rancher/Kubernetes.

- Experience with data platforms/warehouses (e.g., Databricks).

- Familiarity with agentic and AI-enabled API patterns, including RAG, agents, and model orchestration.

- Experience with one or more of : Java, .NET, Python, Golang, JavaScript/TypeScript.

- Exposure to Model Context Protocol (MCP), Agent2Agent (A2A), and Agent2Payments (A2P) is a plus.

- Strong engineering practices : agile methodologies, DevOps best practices, test-driven development, CI/CD build & deploy systems, and modern code repositories.

- Strong communication skills and the ability to collaborate proactively across infrastructure and engineering teams.