Verified Job On Employer Career Site Job Summary: Celara is seeking an experienced API Engineer to design and build a high-performance unified API platform that connects their applications to various services. This hands-on role involves architecting, implementing, and optimizing secure APIs that will be the foundation of the company's next-generation product capabilities. Responsibilities: • Build a robust API layer that integrates with a variety of third-party and internal services. • Implement request routing, fallback strategies, and dynamic service selection logic. • Develop secure authentication and authorization mechanisms (API keys, OAuth, RBAC). • Enforce per-client rate limits and usage quotas to control access and protect resources. • Implement logging, tracing, and monitoring of requests and responses for analytics and debugging. • Ensure low-latency, high-availability API endpoints, including caching strategies and load balancing. • Work closely with product and engineering teams to integrate the API platform into the broader infrastructure. • Create clear API documentation, developer guides, and internal tooling for easier adoption. Qualifications: Required: • 3–6+ years developing production-grade APIs in Python (FastAPI), Node.js (Express), or Go. • Hands-on experience designing and maintaining scalable API services. • Experience working with enterprise API Gateway solutions (Kong, Mongo, MuleSoft, APISIX). • Familiarity with cloud-native architecture (AWS, GCP, or Azure). • Proficiency in RESTful API design principles. • Strong understanding of authentication standards (OAuth 2.0, JWT). • Experience with rate limiting, caching (Redis), and monitoring tools. • Comfort integrating external APIs and designing clean abstraction layers. • You value clean code, clear documentation, and thoughtful testing. • You’re comfortable working in early-stage environments and iterating quickly. • You have strong communication skills and a collaborative approach. Preferred: • Experience working on multi-tenant platforms or large-scale API gateways. • Familiarity with prompt management or workflow orchestration (not required). • Exposure to observability stacks (OpenTelemetry, Datadog, Prometheus) Company: Celara transforms your vision into reality by building elite near-shore technology teams with CTO-level expertise. Founded in , the company is headquartered in Tysons Corner, Virginia, US, with a team of 51-200 employees. The company is currently Growth Stage.