Senior Software Engineer (Backend)U.S. Citizenship Required | TS/SCI EligibleWe're hiring a Senior Software Engineer (Backend) to support mission-critical, high-impact systems that directly serve real-world end users. This role is ideal for an experienced backend engineer who enjoys building scalable RESTful APIs, working in Linux environments, and contributing to national security and geospatial intelligence missions.
You'll join a collaborative, Agile team delivering modern software solutions across enterprise platforms using DevSecOps and cloud-native methodologies. The work you do will have immediate visibility and tangible impact for a highly engaged user community.
What You'll Do- Design, develop, test, and maintain backend software using object-oriented programming principles
- Build, support, and enhance RESTful API services within established architectural frameworks
- Develop and optimize SQL queries, supporting data validation, schema updates, and performance improvements
- Develop, deploy, and troubleshoot applications in Linux-based environments
- Identify, debug, and resolve application and system performance issues
- Contribute to solution design discussions and support implementation of approved architectures
- Collaborate with Senior engineers, cross-functional partners, and stakeholders to translate requirements into technical solutions
- Participate in code reviews, follow engineering standards, and contribute to documentation and best practices
What We're Looking ForRequired Qualifications- U.S. Citizenship (required per contract)
- TS/SCI eligibility
- 8-11 years of experience
- Professional experience with Python and/or Java
- Experience developing or maintaining RESTful API servers
- Strong SQL skills with relational databases
- Hands-on experience working in Linux environments
- Ability to work independently within established technical guidelines
Nice to Have- JavaScript or front-end exposure
- Experience with CI/CD pipelines (GitLab preferred)
- Familiarity with Docker, OpenShift, or containerized environments
- Exposure to cloud platforms (AWS preferred)
- Experience with Spring Boot, PostgreSQL, Tomcat, or Maven
- Agile development experience
- Familiarity with modern web frameworks
Job Type & LocationThis is a Contract to Hire position based out of Gaithersburg, MD.
Pay and BenefitsThe pay range for this position is $81.00 - $95.00/hr.
Eligibility requirements apply to some benefits and may depend on your job classification and length of employment. Benefits are subject to change and may be subject to specific elections, plan, or program terms. If eligible, the benefits available for this temporary role may include the following:
Medical, dental & vision
Critical Illness, Accident, and Hospital
401(k) Retirement Plan - Pre-tax and Roth post-tax contributions available
Life Insurance (Voluntary Life & AD&D for the employee and dependents)
Short and long-term disability
Health Spending Account (HSA)
Transportation benefits
Employee Assistance Program
Time Off/Leave (PTO, Vacation or Sick Leave)
Workplace TypeThis is a fully onsite position in Gaithersburg,MD.
Application DeadlineThis position is anticipated to close on May 1, 2026.
>About TEKsystems:
We're partners in transformation. We help clients activate ideas and solutions to take advantage of a new world of opportunity. We are a team of 80,000 strong, working with over 6,000 clients, including 80% of the Fortune 500, across North America, Europe and Asia. As an industry leader in Full-Stack Technology Services, Talent Services, and real-world application, we work with progressive leaders to drive change. That's the power of true partnership. TEKsystems is an Allegis Group company.
The company is an equal opportunity employer and will consider all applications without regards to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.
About TEKsystems and TEKsystems Global Services We're a leading provider of business and technology services. We accelerate business transformation for our customers. Our expertise in strategy, design, execution and operations unlocks business value through a range of solutions. We're a team of 80,000 strong, working with over 6,000 customers, including 80% of the Fortune 500 across North America, Europe and Asia, who partner with us for our scale, full-stack capabilities and speed. We're strategic thinkers, hands-on collaborators, helping customers capitalize on change and master the momentum of technology. We're building tomorrow by delivering business outcomes and making positive impacts in our global communities. TEKsystems and TEKsystems Global Services are Allegis Group companies. Learn more at TEKsystems.com.
The company is an equal opportunity employer and will consider all applications without regard to race, sex, age, color, religion, national origin, veteran status, disability, sexual orientation, gender identity, genetic information or any characteristic protected by law.
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