Lead Software Engineer

Job Title: Lead Software Engineer Location: Reston, VA Type: Contract Compensation: $88/hr Work Model: Hybrid

Overview

We are seeking a Lead Software Engineer to support a multi-year cloud modernization initiative focused on migrating enterprise applications from on-premises and mainframe environments to AWS. This role is heavily centered on Java backend development, application modernization, cloud readiness, and integration work, helping transform legacy systems into scalable, cloud-native solutions. The ideal candidate will have strong experience with Java, AWS, Kubernetes/EKS, cloud migrations, and enterprise application integrations. This is not a DevOps role; the focus is application-level engineering, modernization, and cloud adoption.

Responsibilities

• Lead the design, development, testing, and deployment of enhancements supporting cloud migration initiatives.
• Develop and modernize Java-based enterprise applications running in AWS and Kubernetes environments.
• Support migration of application connectivity from on-premises and mainframe systems to cloud-supported technologies such as MongoDB and PostgreSQL.
• Design and implement integrations, authentication mechanisms (OAuth2/JWT), and application configurations required for cloud deployment.
• Collaborate with Platform Engineering, DevOps, Product Owners, and business stakeholders to ensure cloud-ready solutions.
• Identify technical gaps, evaluate risks, and recommend solutions to improve application performance, scalability, and reliability.
• Participate in Agile ceremonies, estimation, planning, and feature delivery.
• Ensure adherence to enterprise architecture standards, DevSecOps practices, and coding best practices.
• Support application modernization, cloud-native architecture adoption, and microservices development.
• Mentor junior engineers and contribute to continuous improvement initiatives.

Requirements

• Bachelor's degree in Computer Science, Information Technology, or a related field.
• 8+ years of software engineering experience, including design, development, testing, and requirements analysis.
• Strong Java development experience with a focus on backend engineering.
• 3+ years of AWS experience.
• 3+ years of Amazon EKS and Kubernetes experience, including Helm Charts and Istio.
• 3+ years of experience with OAuth2 and JWT authentication.
• Experience integrating applications with databases, APIs, and enterprise systems.
• Experience supporting cloud migration and application modernization initiatives.
• Experience with MongoDB and/or PostgreSQL.
• Experience integrating legacy on-premises applications with cloud-based solutions.
• Experience working in Agile development environments.

Preferred

• Full-stack development experience with a primary focus on backend development (approximately 80% backend / 20% frontend).
• Experience with cloud-native architectures and microservices.
• Experience with Angular (Angular 18+ preferred), HTML, and modern UI technologies.
• Experience modernizing database connectivity and migrating legacy integrations to cloud platforms.
• Familiarity with mainframe-connected applications.
• Knowledge of CI/CD pipelines, SDLC, DevSecOps practices, and enterprise deployment standards.

System One, and its subsidiaries including Mountain Ltd., are leaders in delivering outsourced services and workforce solutions across North America. We help clients get work done more efficiently and economically, without compromising quality. System One not only serves as a valued partner for our clients, but we offer eligible employees health and welfare benefits coverage options including medical, dental, vision, spending accounts, life insurance, voluntary plans, as well as participation in a 401(k) plan.

System One is an Equal Opportunity Employer. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex (including pregnancy, childbirth, or related medical conditions), sexual orientation, gender identity, age, national origin, disability, family care or medical leave status, genetic information, veteran status, marital status, or any other characteristic protected by applicable federal, state, or local law.

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Ref: #851-Rockville-S1