Sr Java API Engineer

Position: Sr Java API Engineer

Location: Remote EST

Duration: 12+ months

Requirements:

• 7+ years of software engineering experience
• Primary expertise in Java/Spring Boot API development
• Hands-on experience working with Broadcom Layer7 API gateways or API management platforms
• Understanding of API security and authentication concepts, including OAuth 2.0, JWT, and mTLS
• Experience integrating with internal applications, third-party platforms, and databases

Description:

Client is seeking an experienced Senior Java API Engineer to support a large enterprise financial services organization focused on building, enhancing, and modernizing its API and integration ecosystem.

This is a hands-on engineering role with a strong emphasis on Core Java, Java microservices, API development, and enterprise integration. The engineer will support both ongoing business initiatives and a broader API modernization strategy, including the evolution of services from legacy integration and gateway technologies toward a standardized enterprise architecture.

The ideal candidate is a strong Java engineer who understands the full API lifecycle, has experience working within enterprise API gateway environments, and can help determine when functionality belongs within the gateway versus the underlying microservices layer.

Key Responsibilities

• Design, develop, enhance, and support Java-based APIs and microservices
• Build and maintain RESTful services and enterprise integrations
• Support high-volume API services connecting internal applications, external business partners, and third-party platforms
• Analyze existing API implementations and identify opportunities to modernize or move functionality into Java microservices
• Work within enterprise API gateway and API management environments
• Support API gateway modernization and migration initiatives
• Develop and maintain API routing, security, integration, and service functionality
• Integrate applications with internal and third-party systems
• Troubleshoot API, integration, performance, and production issues
• Participate in Agile development activities, code reviews, testing, and regular production releases
• Collaborate with architects, product owners, business analysts, QA teams, and other developers
• Translate business requirements into scalable technical solutions
• Contribute to API governance, engineering standards, documentation, and reusable development practices

Required Qualifications

• 7+ years of software engineering or application development experience
• 5+ years of hands-on Java development
• Strong experience developing Java microservices
• Experience with Spring / Spring Boot
• Strong RESTful API design and development experience
• Experience with enterprise integration services and distributed application architectures
• Hands-on experience working with API gateways or API management platforms
• Understanding of API security and authentication concepts, including OAuth 2.0, JWT, and mTLS
• Experience integrating with internal applications, third-party platforms, and databases
• Experience with Git-based development and CI/CD practices
• Strong troubleshooting and problem-solving skills
• Ability to communicate effectively with both technical teams and business stakeholders

Preferred Qualifications

• Experience with enterprise API gateway modernization or migration initiatives
• Experience working across multiple API management or integration platforms
• Experience determining which orchestration, transformation, or business logic should reside within microservices versus an API gateway
• Experience with MuleSoft or similar enterprise integration platforms
• Experience modernizing legacy integrations into Java/Spring Boot services
• Financial services or banking industry experience
• Experience with monitoring and observability tools such as Splunk, Dynatrace, or AppDynamics
• Experience with API governance and enterprise architecture standards