Application Developer IV

Geisinger•Work from home (Pennsylvania), PA

2d•Remote

About The Position

Reviews, analyzes, modifies, creates, debugs, designs, and tests applications using modern development methodologies and tools. Provides key insight in design and application architecture discussions. Serves as a key contributor on a multidisciplinary team and participates in all aspects of the application development lifecycle to ensure successful delivery. Additionally, this role leads the definition and implementation of an API-led connectivity strategy, driving the design and development of a reusable API network that enables scalable, secure, and governed integrations across the organization.

Requirements

API design and development (REST, API-led connectivity); RAML, OpenAPI (OAS3), AsyncAPI; MuleSoft Anypoint Platform (including CloudHub 2.0); System, Process, Experience API layering; API proxies, gateways, and policy implementation; API security (OAuth 2.0, JWT, TLS, rate limiting); software development (Java, Python, or JavaScript); CI/CD and Git-based workflows; debugging, performance tuning, and troubleshooting; architecture diagrams and technical documentation; collaboration and participation in design discussions
High School Diploma or Equivalent (GED)- (Required)
Minimum of 10 years-Relevant experience (Required)

Nice To Haves

Enterprise API strategy and API network design; event-driven and asynchronous architecture; microservices and distributed systems; MuleSoft certified developer (Mule 4); MuleSoft certified platform architect (MCIA Level 1); MuleSoft certified integration architect (MCIA Level 2); cloud platforms (AWS, Azure, GCP); CI/CD pipeline optimization and infrastructure-as-code; API analytics, monitoring, and observability; API cataloging and developer portals; technical leadership and mentoring experience

Responsibilities

Responsible for the process, life cycle, and creation of the software to assist users in completing a computer task or program.
Implements code and documents all system changes based on assignments and timelines.
Develops and follows department coding and user interface guidelines.
Provides code review, testing, debugging, technical documentation, general testing instructions, go-live planning, assistance in go-live moves, and post-live support.
Communicates all progress, roadblocks, and issues to the team and management in a timely manner.
Collaborates with team members to identify and resolve issues, improve system performance, and ensure code quality.
Provides training and documentation to team members on new development assignments.
Trains and mentors staff members.
Assists in the development and documentation of a technical approach for a solution to the team stakeholders.
Define and implement an enterprise API-led connectivity strategy aligned with business and IT goals
Design and evolve a reusable API network, including System, Process, and Experience APIs
Establish API architecture standards, governance models, and best practices
Lead API design efforts using industry-standard specifications: RAML, OpenAPI Specification (OAS 3.x), AsyncAPI
Create and maintain architecture diagrams and graphical representations of integration patterns, data flows, and system interactions
Architect and implement integrations using MuleSoft Anypoint Platform (CloudHub 2.0)
Define and enforce API lifecycle governance including design, development, deployment, versioning, and retirement
Design and implement API proxies, policies, and traffic management controls
Ensure APIs are secure by design, applying policies such as: OAuth 2.0 / OIDC JWT validation Rate limiting / throttling Threat protection
Promote API reusability and discoverability through proper documentation and API cataloging
Partner with security, infrastructure, and platform teams to ensure scalability, resilience, and compliance
Provide technical leadership in architecture reviews, design sessions, and integration strategy discussions
Work is typically performed in an office environment.
Accountable for satisfying all job specific obligations and complying with all organization policies and procedures.