API Developer

Required Qualifications

API Development (Core Focus)

• 3 5 years of professional experience designing and developing RESTful APIs

• Strong knowledge of API design principles, patterns, and best practices (REST, versioning, pagination, error handling)

• Experience with API documentation tools such as OpenAPI/Swagger and Postman

• Proven ability to design APIs for scalability, performance, and maintainability

• Experience implementing API security (OAuth 2.0, JWT, API keys)

• Hands-on experience with API testing frameworks and methodologies

• Understanding of rate limiting, throttling, and API gateway patterns

• Experience managing the API lifecycle, including inventory, deprecation analysis, and code identification across large service environments

• Ability to programmatically analyze API codebases (e.g., JAX-RS annotations, OpenAPI specs) to extract endpoint metadata at scale

Spring Boot Expertise

• Extensive experience building APIs using Spring Boot and Spring Web

• Experience with Spring Cloud for distributed API architectures

• Strong knowledge of Spring Security for API authentication and authorization

Node.js & Express

• Experience developing RESTful APIs using Node.js and Express

• Understanding of async/await patterns and event-driven architecture

• Familiarity with Express middleware, routing, and error handling

Python & FastAPI

• Experience developing APIs with Python and FastAPI

• Knowledge of Python async/await patterns and type hints

Payment API Integration

• Hands-on experience integrating PayPal APIs (REST APIs, webhooks, payment processing)

• Understanding of payment workflows, transaction management, and reconciliation

• Knowledge of secure payment data handling and PCI compliance considerations

• Experience implementing webhooks and event-driven payment processing

API Governance & Analysis

• Experience analyzing API traffic patterns

• Ability to reconcile multiple data sources (APM traces, traffic logs, code analysis) to generate evidence-based API lifecycle recommendations

• Understanding of API observability concepts, including trace sampling, resource normalization, service attribution, and traffic aggregation

• Experience building automated tools for API fleet analysis across large service environments (100+ services)

AI-Assisted Development

• Experience using AI-assisted development tools (GitHub Copilot, Claude Code, Cursor, or similar)

• Ability to leverage AI for API design review, code generation, and documentation

• Experience using AI to analyze codebases and identify optimization opportunities

• Proficiency using AI to accelerate API testing and validation

• Experience building hybrid pipelines combining deterministic scripts with AI-driven validation

• Ability to design AI prompts and domain-specific context for code analysis

Version Control & Collaboration

• Experience with GitHub Enterprise (on-premise) and GitHub EMU environments

• Strong understanding of Git workflows, branching strategies, GitHub Actions, and pull request processes

Agentic Workflows

• Experience designing and implementing agentic workflows and autonomous systems

• Understanding of workflow orchestration and event-driven architectures

• Ability to build intelligent API-driven automation systems

Preferred Skills

• Experience with GraphQL APIs

• Knowledge of gRPC and other API protocols

• Experience with API monitoring and observability tools (Datadog, Traceable), including programmatic access to APM span data, trace metrics, and traffic analysis via Datadog APIs

• Familiarity with API management platforms

• Experience integrating with additional payment providers (Stripe, Square)

• Knowledge of microservices communication patterns

• Experience with containerization technologies (Docker, Kubernetes)

• Familiarity with Google Cloud Platform (Google Cloud Platform)

Technical Environment

• Languages: Java, Python, Node.js

• Frameworks: Spring Boot, Spring Cloud, Express, FastAPI

• API Tools: Swagger/OpenAPI, Postman

• Version Control: GitHub Enterprise (on-premise & EMU)

• Payment Integration: PayPal APIs

• Development Tools: AI-assisted coding tools (GitHub Copilot, Claude Code, Cursor)

• Observability: Datadog APM APIs (v1 Metrics, v2 Spans Analytics)

• Analysis: API endpoint extraction, traffic comparison, and code verification