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# SIP Developer (Occas)

- **Company:** Apex Systems LLC
- **Location:** Eden Prairie, MN, United States
- **Contract:** Permanent contract
- **Skills:** Artificial Intelligence, Amazon Web Services, Data Analysis, Server Applications, Oracle WebLogic Server, Software as a Service, Continuous Integration, Software Debugging, DevOps, Java Platform Enterprise Edition (J2EE), Github, Java Servlet, Routing, Oracle (Applications), Session Management, Software Engineering, Wireshark, Amazon Connect, Data Logging, Cisco Unified Contact Center Enterprise (UCCE), Genesys, System Availability, Grafana, Containerization, Kubernetes, Cisco, Docker, Jenkins
- **Published:** June 27, 2026
- **Apply:** https://www.juju.com/job/00000000gbc1mn

## About the Role

Technical Skills

Strong hands-on experience with:

SIP protocol (RFC 3261 and related RFCs)

SIPREC standards and implementation

Expertise in:

Java / J2EE / SIP Servlets (OCCAS/WebLogic)

Deep understanding of:

Call flows, SDP, RTP media handling

SIP dialog/state management

Platform Experience

Proven experience with:

Oracle OCCAS (or equivalent SIP application server)

SBC platforms (Oracle, Audiocodes, Acme Packet, etc.)

Familiarity with:

Media Hub / recording architecture

Contact center platforms (Amazon Connect, Genesys, Cisco UCCE)

DevOps & Cloud

Experience with:

CI/CD tools (GitHub, Jenkins)

Infrastructure as code

Containerization (Docker/Kubernetes)

Understanding of cloud platforms:

AWS preferred

Troubleshooting & Observability

Expertise using:

Wireshark / SIP traces / SIP ladder diagrams

Strong debugging skills in:

High-volume, real-time SIP environments

Experience with:

Logging, monitoring, and observability tools

 4. Preferred Qualifications

Experience in:

Large-scale SIP platforms (multi-cluster OCCAS deployments ~100+ engines)

Knowledge of:

Telecom standards (3GPP, IMS)

Experience with:

AI/ML voice integrations (agent assist, analytics)

Familiarity with:

PCI / compliance-driven call recording environments

## Description

The Oracle Communications Cloud Application Server (OCCAS) SIP Developer designs, builds, and operates SIP-based applications within the OMNIChannel platform, focusing on session management, SIP routing, SIPREC recording flows, and integrations across SBCs, Amazon Connect, and AI-driven systems.

This role is responsible for end-to-end lifecycle delivery-from SIP application development through production operations-ensuring high availability, scalability, and compliance of enterprise voice and recording platforms.

 2. Core Responsibilities

A. SIP Application Development (OCCAS)

Design, develop, and maintain OCCAS-based SIP applications

Session handling, routing logic, and dialog control

Implement features such as:

Header manipulation and normalization

Routing logic updates and dial plan control


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