Open Source Software Developer Jobs in Illinois (NOW HIRING)

Join a high-performing engineering team delivering innovative software solutions that support critical national security missions. As an Expert Software Developer, you will provide technical leadership across the full software development lifecycle, designing and implementing scalable enterprise applications, cloud-native solutions, and modern web-based systems. You will work closely with engineers, architects, and stakeholders to transform complex requirements into robust software capabilities while helping guide development best practices and mentoring less-experienced team members.

This role is ideal for a seasoned software engineer who enjoys solving challenging technical problems, driving architectural decisions, and contributing to the development of mission-critical applications in a collaborative Agile environment.

• Design, develop, and maintain enterprise software applications and web-based solutions.
• Provide engineering and programming support for mission and infrastructure-related projects.
• Lead software design efforts and contribute throughout all phases of the software development lifecycle.
• Analyze user and business requirements and translate them into scalable technical solutions.
• Design application architectures, workflows, models, and technical diagrams to support development efforts.
• Develop and customize software applications to improve operational efficiency and mission effectiveness.
• Support database design, integration, and development activities.
• Develop and maintain websites and web applications, including deployment and sustainment activities.
• Perform software testing, troubleshooting, debugging, and quality assurance activities.
• Provide technical analysis and reporting on project status, system performance, and development activities.
• Collaborate with cross-functional teams in an Agile development environment.
• Provide guidance, mentorship, and technical leadership to junior developers and analysts.
• Serve as a technical consultant across multiple programs, projects, or contracts as needed.
• Stay current with emerging technologies, industry trends, and software development best practices.

• Bachelor's degree in Computer Science, Software Engineering, Information Systems, or related field, or equivalent experience.
• 10+ years of software development experience.
• Extensive experience developing enterprise applications and web-based software solutions.
• Strong experience with Java application development.
• Experience developing front-end applications using Angular.
• Experience designing and developing web services and APIs.
• Experience working in Agile/SCRUM environments and supporting Lean Agile methodologies.
• Experience with source control and CI/CD tools including Git and Jenkins.
• Experience with continuous integration, automated testing, DevOps practices, and software quality assurance.
• Familiarity with Linux operating environments.
• Experience translating formal and informal requirements into scalable software solutions.
• Experience working with database connectivity technologies including JDBC, ODBC, or similar database interfaces.
• Strong communication, analytical, and problem-solving skills.
• Ability to work effectively within geographically dispersed teams.

• Experience developing and implementing microservices architectures, including micro front-end solutions.
• Experience designing and deploying solutions within AWS cloud environments.
• Experience building and supporting automated CI/CD pipelines.
• Experience with distributed data architectures and large-scale systems.
• Experience developing infrastructure-as-code solutions using Terraform and/or Puppet.
• Hands-on experience with RESTful and SOAP web services.
• Experience supporting government architecture review boards or engineering governance processes.
• Ability to communicate complex technical concepts to non-technical audiences.
• Familiarity with AWS services and cloud-native application development.

• Java
• Angular
• Git
• Jenkins
• Linux
• AWS
• Terraform
• Puppet
• REST APIs
• SOAP Services
• JDBC / ODBC
• CI/CD Pipelines
• Agile / Scrum
• DevOps
• Microservices Architecture

TS/SCI FSP

The salary range for this position is $151,323.00 to $205,577.00. The proposed range is intended as a general guideline. Final compensation will be determined based on qualifications, experience, location, and contractual considerations and may fall outside of the stated range. We offer a great benefits package designed to support you and your family. View our benefits information here: https://sapns2.com/ns2-mission-careers/

Please be aware many of our positions require the ability to obtain or maintain a U.S security clearance which requires U.S citizenship.

NS2 Mission’s culture of inclusion, focus on health and well-being, and flexible working models help ensure that everyone – regardless of background – feels included and can run at their best. At NS2 Mission, we believe we are made stronger by the unique capabilities and qualities that each person brings to our company, and we invest in our employees to inspire confidence and help everyone realize their full potential. We ultimately believe in unleashing all talent and creating a better world.

NS2 Mission is committed to the values of Equal Employment Opportunity and provides accessibility accommodations to applicants with physical and/or mental disabilities. If you are interested in applying for employment with NS2 Mission and are in need of accommodation or special assistance to navigate our website or to complete your application, please send an e-mail with your request to Recruiting Operations Team: NS2Mission.Careers@sapns2.com.

Qualified applicants will receive consideration for employment without regard to their age, race, religion, national origin, ethnicity, age, gender (including pregnancy, childbirth, et al), sexual orientation, gender identity or expression, protected veteran status, or disability, in compliance with applicable federal, state, and local legal requirements.