API Designer - Expert Level

API Designer - Expert Level

As an API Designer, you will be responsible for designing, documenting, and evolving robust, scalable, and user-friendly APIs. As a Senior Lead Software Engineer within the Commercial and Investment Banking team, you will play a key role in an agile team dedicated to building, enhancing, and delivering trusted, market-leading technology products. You will leverage your deep technical expertise and problem-solving skills to address complex challenges across multiple technologies and applications, driving significant business impact through your contributions.

Key Responsibilities:

• API Design: Design RESTful, GRPC, and/or event-driven APIs using best practices and industry standards (e.g., OpenAPI/Swagger, AsyncAPI).
• Documentation: Create and maintain clear, comprehensive API documentation and usage guides.
• Collaboration: Work with product, engineering, and Architect teams to gather requirements and translate them into API specifications.
• Standards & Governance: Define and enforce API design standards, style guides, and governance processes.
• Prototyping: Build API prototypes and mock servers to validate designs and facilitate early feedback.
• Developer Experience: Advocate for and implement features that improve the developer experience, such as versioning, error handling, and discoverability.
• Lifecycle Management: Support the full API lifecycle, including versioning, deprecation, and backward compatibility.
• Quality Assurance: Collaborate with QA and development teams to ensure APIs are well-tested and meet performance, security, and reliability standards.
• Continuous Improvement: Stay up to date with API trends, tools, and technologies, and drive continuous improvement in API design practices.

Required Skills & Qualifications:

• Formal training or certification in software engineering concepts, with 10+ years of applied experience
• Strong understanding of REST, GRPC, and/or event-driven API paradigms
• Proficiency with API specification tools (OpenAPI/Swagger, RAML, AsyncAPI, Postman, etc.)
• Experience with API gateways, management platforms, and developer portals
• Excellent communication and documentation skills
• Familiarity with security best practices (OAuth2, JWT, API keys, etc.)
• Experience working in Agile/Scrum environments.

Preferred Qualifications:

• Experience with AWS (EKS)
• Knowledge of Micro Services & Domain Driven architecture
• Experience with CI/CD pipelines and automated API testing
• Contributions to open-source API tools or standards

Diverse Lynx LLC is an Equal Employment Opportunity employer. All qualified applicants will receive due consideration for employment without any discrimination. All applicants will be evaluated solely on the basis of their ability, competence and their proven capability to perform the functions outlined in the corresponding role. We promote and support a diverse workforce across all levels in the company.