Demo

Integration and Middleware Developer

Apollo Technology Solutions LLC
Middletown, PA Contractor
POSTED ON 1/28/2026 CLOSED ON 3/27/2026

What are the responsibilities and job description for the Integration and Middleware Developer position at Apollo Technology Solutions LLC?

Job Title: Integration and Middleware Developer
Duration: 3 Months
Location: Middletown, PA-Initially Remote
Note:
  • The resource must attend onsite meetings at one of the client Middletown PA locations for 1 week per month based on the schedule set by the client.
Job Description:
Description of Duties:
  • 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, 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, and 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.
  • Fully document all created work associated with this position, including technical and functional designs and diagrams, test plans, test scripts, impact analysis reports, lessons learned, best practices for others to follow, plus any other documentation as required by the Commission. This documentation shall follow the format and / or templates as instructed by the Commission.
  • Participate in code reviews and contribute to team knowledge sharing.
  • Develop and maintain a productive working relationship with technology staff, business owners, project sponsors, vendors, and key clients.
  • Work independently to accomplish the tasks and duties assigned.
  • Adhere to and follow all The Commission standards, policies, and procedures.
  • Utilize various software and/or technology tools to perform job duties.
  • Perform tasks and other duties as related to this position and role and assigned by the Commission.
Required Experience:
  • 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 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).
  • Bachelor's degree in Computer Science, Engineering, or a related field. Master's degree preferred.
  • 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.
Desired Skillset:
  • 10 years of expertise developing complex systems integrations for highvolume 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 similar customer-facing environments.
  • Experience integrating with SAP BRIM for subscription billing.
  • Experience in integrating with retail POS/eCommerce integrations and CRM systems for customer service.
  • Familiarity with event-driven architectures (Kafka, Azure Event Hub).
  • Advanced certifications in Azure, Kubernetes, or integration platforms are highly desirable.
  • Experience with message queues (Kafka, RabbitMQ).
  • Familiarity with monitoring tools (Prometheus, Grafana).
Required/Desired Skills:
  • Integration/middleware development with at least 3 years in a senior or lead role.
  • Experience in backend development using .Net.
  • Experience in backend development using Python.
  • Experience in backend development using GoLang.
  • Strong understanding of RESTful API design and decentralized microservices architecture.
  • At least 2 implementation projects where they use 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): 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.

Hourly Wage Estimation for Integration and Middleware Developer in Middletown, PA
$40.00 to $46.00
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