Application Developer IV

Geisinger

Application Developer IV involved in modern application development and API strategy at Geisinger. Participating in all aspects of the application lifecycle for scalable and secure integrations.

Posted 6/11/2026full-timeRemote • Pennsylvania • 🇺🇸 United StatesSeniorLeadWebsite

Tech Stack

Tools & technologies

JavaJavaScriptPython

About the role

Key responsibilities & impact

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.
Leads the definition and implementation of an API-led connectivity strategy.
Drives the design and development of a reusable API network that enables scalable, secure, and governed integrations across the organization.
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.

Requirements

What you’ll need

High School Diploma or Equivalent (GED)- (Required)
Minimum of 10 years-Relevant experience* (Required)
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

Benefits

Comp & perks

healthcare benefits for full time and part time positions from day one, including vision, dental and domestic partners

ATS Keywords

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Applicant Tracking System Keywords

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Hard Skills & Tools

API designAPI developmentRESTRAMLOpenAPIAsyncAPIMuleSoft Anypoint PlatformJavaPythonJavaScript

Soft Skills

collaborationcommunicationmentoringproblem-solvingleadershiptrainingdocumentationteamworktime managementadaptability