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Stage 4 Solutions

Senior Integration and Middleware Developer (Remote – Middletown, PA)

Hybrid

Middletown, United states

$ 73 /year

Senior

Freelance

27-01-2026

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Skills

Python Go Encryption SAP Dynamics Kubernetes Monitoring CRM Architecture Programming Databases Azure cloud platforms .NET Prometheus Grafana Microservices Microsoft Azure

Job Specifications

We are currently recruiting a Senior Integration and Middleware Developer, a Commonwealth PA entity. In this role, you will connect the different systems, applications, and technologies, including SAP S/4HANA, Billing and Revenue Innovation Management (BRIM), Microsoft Dynamics 365, cloud telephony and IVR, web portals, mobile apps, middleware systems, document storage and retrieval solutions, cloud hosting, and more, and ensure they technically work seamlessly together for best-in-class performance.

This contract position is long-term with funding approved until 6/30/2026 (extensions possible), a 40-hour per week role. This position is a remote role in Middletown, PA. The candidates must be 2 hours or less from Middletown, PA.

The resource shall attend onsite meetings at one of the Commission’s Middletown, PA locations for 1 week per month based on the schedule set by the Commission.

In-person interviews, work sessions, and a full-day orientation will be conducted at PTC’s Middletown, PA, offices. The selected resource must attend the orientation onsite to receive any assigned PTC equipment, which cannot be shipped or picked up by anyone else. Travel costs for the orientation, interviews, and equipment pickup will not be reimbursed.

This is a W-2 role as a Stage 4 Solutions employee. Health benefits and 401K are offered.

Responsibilities

Connect the different systems, applications, and technologies, including SAP S/4HANA, Billing and Revenue Innovation Management (BRIM), Microsoft Dynamics 365, cloud telephony and IVR, web portals, mobile apps, middleware systems, document storage and retrieval solutions, cloud hosting, and more, and ensure they technically work seamlessly together for best-in-class performance.
Analyze solution components and their respective integration models.
Assess integration options for high-volume processing.
Apply best practices towards leveraging on-demand open Application Programming Interfaces (API)s.
Identify opportunities to reduce the need for data replication and integration.
Act as a continuous improvement agent to further enhance technical integrations, streamline data flows, and optimize performance.
Lead the development and implementation of complex solutions that meet tolling project requirements, leveraging SAP, Customer Relationship Management (CRM), Azure cloud services, IVR technologies, and integrating with external systems as needed.
Design and implement robust integrations between SAP, CRM systems, Azure cloud services, IVR systems, and various external systems (e.g., payment gateways, backend databases, traffic management systems).
Design and optimize IVR systems to improve tolling customer interactions and operational efficiency, integrating seamlessly with CRM systems and tolling backend systems.
Collaborate effectively with cross-functional teams, including business stakeholders, analysts, developers, vendor partners, and project managers, to deliver high-quality tolling solutions on schedule.
Stay updated with .Net, GoLang best practices, and emerging technologies, and tolling industry trends, recommending innovative solutions to enhance project efficiency and customer experience, and applying best practices towards leveraging on-demand open APIs.
Optimize transaction processing speed, latency, and reliability, and monitor system performance, troubleshooting issues promptly.
Build middleware workflows for cloud telephony, IVR systems, web portals, and mobile applications.
Apply encryption and data protection strategies for sensitive customer and payment data.
Implement observability (logging, monitoring, tracing) using tools like Prometheus, Grafana, or Azure Monitor.

Requirements

8+ years in integration/middleware development with at least 3+ years in a senior or lead role.
7+ years of experience in backend development using .Net.
5+ years of experience in backend development using Python.
3+ years of experience in backend development using GoLang.
Strong understanding of RESTful API design and decentralized microservices architecture.
At least 2 implementation projects where they use a decentralized event-based microservices architecture.
Solid understanding of concurrency, memory management, and performance optimization in Go and .Net.
Strong background using development tools like Podman and orchestration (Kubernetes).
Strong understanding of Microsoft government and commercial cloud platforms (Azure), including Infrastructure as a Service (IaaS), Platform as a Service (PaaS), and Software as a Service (SaaS) offerings.
Bachelor’s degree in Computer Science, Engineering, or a related field. Master’s degree preferred.

Desired Skills

10+ years of expertise developing complex systems integrations for high-volume organizations within SAP, MS Dynamics 365 Customer Relationship Management solutions, and Microsoft Azure Cloud hosting solutions.
Hands-on experience with IVR systems design, development, and optimization, preferably in tolling or simila

About the Company

Stage 4 Solutions is a consulting and interim staffing firm ranked on the Inc. 5000 list five times for consistent growth. We specialize in serving high-tech, pharmaceutical, and aerospace/defense companies and government agencies, by providing seasoned professionals for both short-term and long-term needs across marketing, technology and operations teams. We utilize our extensive internal network of experienced consultants and contractors to fast-track critical initiatives and fill resource gaps. Since 2001, we have served... Know more