Software Developer Engineer Jobs in Pennsylvania

Description

Contingent Contract Award

ONSITE-Mechanicsburg, PA

Anticipated State date 9/1/2026

Connected Logistics is seeking to hire a Software Developer Sr - Senior to support a DLA client's full software development lifecycle; to provide in-depth knowledge of requirements development, system design, system performance, software programming; and to design and manage the database and deployment of software. 

Software Developer Senior serves as Sustainment Lead or Sustainment Subject Matter Expert (SME). Provides expert-level knowledge of sustainment life cycle management activities for programs and project operations.

Key Responsibilities

Software Development & Architecture

• Design and develop complex software solutions using best practices and modern technologies. 
• Ensure code quality through design reviews, code reviews, and adherence to development standards. 
• Lead architectural discussions and contribute to implementing and deploying technology strategies. 

Leadership & Mentorship

• Provide technical guidance and mentorship to mid-level and junior developers. 
• Foster a culture of continuous learning and improvement within the development team. 
• Lead by example in writing clean, maintainable, and efficient code. 

Agile Team Collaboration

• Participate in sprint planning, backlog refinement, and Agile ceremonies. 
• Work closely with Product Owners, QA engineers, and Computer Systems Analysts to deliver value-driven features. 
• Drive technical discussions and decision-making within the team. 

Performance & Optimization

• Identify bottlenecks and optimize application performance. 
• Implement and advocate for secure coding practices. 
• Ensure maintainability and scalability of software solutions

Requirements

• Ten or more years of professional software development experience.
• Strong   experience designing and developing enterprise applications using C#, VB.NET, .NET 8+, ASP.NET Core, and object-oriented programming principles.
• Experience developing web applications using JavaScript and React, Angular, or another modern front-end framework.
• Strong   experience with SQL, relational databases, Entity Framework, or another ORM.
• Experience   designing or supporting microservices, event-driven systems, asynchronous messaging, and distributed applications.
• Strong understanding of domain-driven design, clean architecture, service boundaries, domain events, and related architectural patterns.
• Experience   with messaging technologies such as NServiceBus, RabbitMQ, or comparable platforms.
• Ability to evaluate and improve application performance, scalability, reliability, and maintainability.
• Strong understanding of secure coding practices, application security risks, and secure software design principles.
• Familiarity with Git, source control strategies, peer reviews, and collaborative development practices.
• Ability to lead technical design, development, testing, troubleshooting, and application modernization efforts.
• Experience mentoring developers, leading technical teams, and communicating design decisions to technical and business stakeholders.
• Experience using AI-assisted development tools to improve coding, testing, troubleshooting, research, and documentation.
• Ability to work onsite
• U.S. citizen with a current T3 investigation

Preferred Experience

• Prior experience supporting the DLA Defense Property Accountability System (DPAS) or the DLA Enterprise Logistics Management System (ELMS).
• Experience with CQRS, vertical-slice architecture, sagas, eventual consistency, retries, idempotency, or message-driven workflows.
• Experience diagnosing performance issues involving application code, database queries, APIs, messaging, or distributed systems.
• Experience modernizing large or complex legacy applications.
• Familiarity with AI agents, MCP servers, retrieval-augmented generation, or custom   AI-enabled development workflows.
• Experience supporting Department of Defense, military, logistics, financial, property accountability, maintenance, supply chain, or enterprise applications.

Total Rewards Statement We believe in fairness and clarity throughout our hiring process. The anticipated salary range for this position is $110,000.00 to $115,000.00 USD. This is a good-faith range based on factors such as your experience, geographic location, and any applicable contractual requirements, and may vary slightly. Beyond salary, we provide a robust benefits package and encourage ongoing professional development, because your growth and well-being matter to us. We're excited to support you in building a rewarding career with us!

Connected Logistics respects the need for confidentiality for all applicants. 

Connected Logistics has been named a 2026 WTOP Top Workplace in the medium sized business category. Our mission is clear: we deliver mission-focused IT, cybersecurity, logistics, and enterprise modernization support to federal agencies. When we invest in our people and create an environment where they feel valued and empowered, we deliver stronger outcomes for our clients and the missions we support.  

Connected Logistics offers an excellent benefits package that includes health, dental, vision, life, and disability insurance, a great 401(k) package, and generous Paid Time Off.