Principal Software Engineer, Full Stack

JSI OVERVIEW

Founded in 1979, JSI is privately held with headquarters in Ottawa, Canada, and offices in Washington DC, Frankfurt, and Sydney. With customers in over 30 countries, across six continents, JSI’s software is used to expand awareness, surface patterns, and simplify data complexity in support of mission-critical operations. With a reputation for innovation—from setting the standard for lawful digital intelligence to empowering customers with AI-enabled analytics-JSI has been helping protect what matters for over 45 years.

JSI USA is seeking a highly motivated and experienced full stack Principal Software Engineer for our Chantilly, Virginia office. This customer-facing role leverages deep technical expertise to solve complex problems and mentor team members. This role requires a strong understanding of software engineering principles, excellent problem-solving skills, and a passion for building high-quality, scalable software.

We offer a relaxed, casual environment where you will enjoy a personal team atmosphere in which open communications and design discussions are encouraged. Our rewarding and stimulating environment have resulted in an outstanding employee retention rate, well above the industry standard.

POSITION SUMMARY

• Collaborate with and across teams to design, develop, test, implement, and support technical solutions in full-stack development tools and technologies.
• Coordinate with requirements management resources to define and deliver robust solutions that drive powerful experiences to help our customers gain data driven insights.
• Work with internal stakeholders and customers to identify and resolve complex technical challenges.
• Provide technical guidance, mentorship, and knowledge sharing to software engineers and cross-functional teams.
• Ensure and enforce software engineering best practices while driving continuous improvement in internal development processes.

REQUIRED QUALIFICATIONS

• Bachelor's degree in computer science, engineering, or related technical field; or equivalent experience plus 10+ years of programming experience; or Master’s degree with 8+ years of experience. Will consider relevant work experience in lieu of degree.
• Minimum 7 years of experience in technical leadership role supporting and interfacing with external customers.
• Possess extensive application development experience, and software engineering and architecture expertise using multiple program languages (e.g., C, C++, C#, ASP.Net, Java, JavaScript, SQL, jQuery, XML, Perl, YAML, and JSON). Strong proficiency with Restful API.
• US Citizenship required.
• Active Top-Secret security clearance required.
• Excellent communication, presentation, and interpersonal skills, with the ability to build strong relationships with customers and internal teams.
• Proven ability to manage customer-facing projects, project priorities, deadlines, and deliverables while demonstrating adaptability and resourcefulness
• Design, develop, test, deploy, maintain, and enhance software solutions.
• Ability to work independently and as part of a small, collaborative team.
• Create and maintain technical documentation.
• Stay up-to-date with industry trends and advancements.
• Willingness to travel approximately 10% or as needed by the customer project.

PREFERRED QUALIFICATIONS

• Experience navigating and collaborating in a hybrid development environment blending agile and traditional waterfall methodologies.
• Professional certifications in project management or agile software development are a plus.
• Familiarity with cloud technologies (e.g. Azure, AWS)
• Minimum 4 years of experience in technical consulting to Federal customers.
• Experience supporting law enforcement, military, or intelligence community customers is a plus.
• Experience authoring or contributing to company intellectual capital.

WORK MODEL

Our people-first culture prioritizes the benefits of flexibility and collaboration. This position is currently a hybrid model where your work week is divided between in-office and remote work in accordance with the office policy and customer requirements. In this role, you will provide technical expertise to our internal teams and customers which may require performing duties at a customer facility or other designated location. Some travel may be required to support the customer.

All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity or expression, national origin, disability, or status as a protected veteran.