Senior Software Engineer
Serco
Position Description & Qualifications
Are you looking for a Senior Software Engineer (Java) position where you can make an impact on protecting the infrastructure that underlies our modern world?
Serco is seeking an experienced and motivated software engineer to join our Advanced Technology Group (ATG) to build and deliver cutting-edges solutions for national defense systems. In this role, you will have the agency to design and implement the next generation of capabilities for operational systems that are increasingly adopting data driven workflows to streamline operations and deliver new capabilities to the Warfighter.
Our team develops interfaces and interconnections between systems, data processing pipelines that process unstructured, semi-structured, and structured data, and foundational software that integrates disparate data sources into database systems. Our software underlies a set of emerging capabilities that enhance situational awareness and streamline operational decision making.
In this role, you will:
Design, develop, test, deploy, and maintain software, primarily in Java
Parsing of structured and semi-structured data formats
APIs and interconnections between systems and components
Data processing pipelines and components
Implement business processes
Implement standards for authentication, authorization, information security marking, and fine-grained access control.
Test and deploy software in Linux based environments
Interface with customers to define requirements and communicate them to the development team
Ensure software complies with client-defined functional and security requirements.
Write software documentation
To be successful in this role, you will have:
Must be a U.S. Citizen
Ability to obtain and maintain a DoD Secret security clearance
Bachelor’s degree or higher in Computer Science, Engineering, Mathematics, Physics, or related STEM discipline from an accredited university
Minimum 5 years of relevant experience
Advanced knowledge of the Java programming language
Ability to independently develop complex software features
Strong stakeholder communication, documentation, and collaboration skills; ability to work with military and civilian personnel
Ability to travel up to 10%
Additional desired experience and skills:
Experience with formal grammars, parsing techniques (e.g, LR parsers), and language design
Experience contributing to production-grade software
Experience with DoD information systems, use cases, and development practices
Experience writing software that interacts with databases and a working knowledge of database internals
Experience with Jakarta EE application development and related standards (JAX-RS, CDI, Config, Servlet) or similar frameworks
Working knowledge of web standards, common protocols (e.g., TCP/IP, TLS), and common data formats (e.g., XML, JSON)
Experience writing software that integrates with authentication, authorization, and single-sign-on technologies
Experience with software containerization and container orchestration technologies
Advanced knowledge of Linux including development and hardening of system services
Working knowledge of secure software development practices and common weaknesses
Working knowledge of Git and bug tracking tools such as JIRA
If you are interested in supporting and working with our military and a passionate Serco team. Submit your application now for immediate consideration. It only takes a few minutes and could change your career!
Company Overview
Serco Inc. (Serco) is the Americas division of Serco Group, plc. In North America, Serco’s 9,000+ employees strive to make an impact every day across 100+ sites in the areas of Defense, Citizen Services, and Transportation. We help our clients deliver vital services more efficiently while increasing the satisfaction of their end customers. Serco serves every branch of the U.S. military, numerous U.S. Federal civilian agencies, the Intelligence Community, the Canadian government, state, provincial and local governments, and commercial clients. While your place may look a little different depending on your role, we know you will find yours here. Wherever you work and whatever you do, we invite you to discover your place in our world. Serco is a place you can count on and where you can make an impact because every contribution matters.
To review Serco benefits please visit: . If you require an accommodation with the application process please email: View email address on click.appcast.io or call the HR Service Desk at View phone number on click.appcast.io, option 1. Please note, due to EEOC/OFCCP compliance, Serco is unable to accept resumes by email.
Candidates may be asked to present proof of identity during the selection process. If requested, this will require presentation of a government-issued I.D. (with photo) with name and address that match the information entered on the application. Serco will not take possession of or retain/store the information provided as proof of identity. For more information on how Serco uses your information, please see our Applicant Privacy Policy and Notice.
Serco does not accept unsolicited resumes through or from search firms or staffing agencies without being a contracted approved vendor. All unsolicited resumes will be considered the property of Serco and will not be obligated to pay a placement or contract fee. If you are interested in becoming an approved vendor at Serco, please email View email address on click.appcast.io .
Serco is an equal opportunity employer. We evaluate qualified applicants without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, veteran status, and other legally protected characteristics.
Pay Transparency
Our Total Rewards package includes competitive pay, performance-based incentives, and benefits that promote well-being and work-life balance—so you can thrive both professionally and personally. Eligible employees also gain access to a wide range of benefits from comprehensive health coverage and health savings accounts to retirement plans, life and disability insurance, and time-off programs that support work-life balance. Program availability may vary based on factors such as contract type, location, hire date, and applicable collective bargaining agreements.
Salary range: The range for this position can be found at the top of this posting. This range is provided as a general guideline and represents a good faith estimate across all experience levels. Actual base salary will be determined by a variety of factors, including but not limited to, the scope of the role, relevant experience, job-related knowledge, education and training, key skills, and geographic market considerations. For roles available in multiple states, the range may vary to reflect differences in local labor markets. In addition to base salary, eligible positions may include other forms of compensation such as annual bonuses or long-term incentive opportunities. Benefits – Comprehensible benefits for full-time employees (part-time employees receive a limited package tailored to their role):
Medical, dental, and vision insurance
Robust vacation and sick leave benefits, and flexible work arrangements where permitted by role or contract
401(k) plan that includes employer matching funds
Tuition reimbursement program
Life insurance and disability coverage
Optional coverages that can be purchased, including pet insurance, home and auto insurance, additional life and accident insurance, critical illness insurance, group legal, ID theft protection
Birth, adoption, parental leave benefits
Employee Assistance Plan
To review all Serco benefits please visit: .
Serco complies with all applicable state and local leave laws, including providing time off under the Colorado Healthy Families and Workplaces Act for eligible Colorado residents, in alignment with our policies and benefit plans. The application window for this position is for no more than 60 days. We encourage candidates to apply promptly after the posting date, as the position may close earlier if filled or if the application volume exceeds expectations. Please submit applications exclusively through Serco’s external (or internal) career site. If an applicant has any concerns with job posting compliance, please send an email to: View email address on click.appcast.io .
- ...DoD) to transform data into actionable intelligence, ensuring mission success in an evolving world. Our mission-first software and data engineering platform modernizes data operations, utilizing advanced workflows, CI/CD, and secure DevSecOps practices. We focus on...SeniorFull timeFlexible hours
- Senior Software Engineer TS/SCI FSPDepartment: Government Customer- HerndonLocation: Herndon, VAACTIVE TS/SCI CLEARANCE with FS poly REQUIRED TO BE CONSIDERED FOR THIS POSITIONSenior Software Engineer:Analyzes user interfaces, maintain hardware and software performance...Senior
$125k - $190k
...team and support our customers in building a safer global future. Overview of Opportunity As a Two Six Technologies Senior Software Engineer for a large-scale platform for situational awareness and command and control, you will work with the development team,...SeniorFull timeContract workWork at officeLocal area$113.2k - $237.8k
...Job Title: Senior Software Engineer Job Category: Engineering Time Type: Full time Minimum Clearance Required to Start: Top Secret Employee Type: Regular Percentage of Travel Required: Up to 10% Type of Travel: Continental US * * * The Opportunity...SeniorFull timeContract workWork experience placementFlexible hours$165k - $220k
...What Impact You'll Have GRVTY is looking for a Senior Software Engineer to join a small, technically focused team supporting national security missions at a customer site in Herndon, Virginia. This is hands-on engineering work — you will be designing and building...SeniorFull timeContract workImmediate startRemote work$122k - $253k
...surveillance, data intelligence, lifecycle mission enablement, and software modernization. Nightwing brings disruptive technologies,... ...community, defense, civil, and commercial markets.Senior Principal Software Engineer, HyperscaleWe are seeking a senior software engineer to...SeniorFull timeRelocationRelocation package$135k - $216k
ResponsibilitiesPeraton is seeking a Senior Software Engineer in our Herndon, VA location to support a large software development classified program. The selected candidate should have experience with agile software methodology, and software engineering design best practices...SeniorFull timeContract workShift work$99k - $206k
...intelligence, lifecycle mission enablement, and software modernization. Nightwing brings... ...defense, civil, and commercial markets.Senior Software EngineerAt Nightwing, we are on... .... We’re looking for a talented Software Engineer who excels at solving complex technical...SeniorFull time$140k - $160k
Senior Software Engineer, Ground & Control Services About Us:BlackSky is a real-time intelligence company. We own and operate the world's most advanced space-based intelligence platform and provide customers satellite imagery, automated analytics and high-frequency monitoring...SeniorPermanent employmentFull timeWork at officeRemote workWorldwide$220k - $292k
...edge autonomy, AI, computer vision, sensor fusion, and networking technology to the military in months, not years.As a Mission Software Engineer, you will solve a wide variety of problems involving networking, autonomy, systems integration, robotics, and more, while...SeniorFull timeWork experience placementImmediate start$175.43k - $183.61k
ICF Incorporated, LLC: Senior Software Engineer (Multiple Positions) Reston, VA.DUTIES:Apply computer science, software engineering, databases, and distributed/parallel processing frameworks to prepare big data for the use of scoring and scoring results.Work on projects...SeniorFull timeContract workWork experience placementWork at officeRemote work- ...active U.S. Government Security Clearance at the Top Secret and/or CBP/DHS suitability level.Vantor is currently seeking a Senior-Level Software Engineer to support our FALCON effort. This role can be performed remotely within the continental United States. As a Vantor...SeniorFull timeRemote work
- ICF Incorporated, LLC: Senior Software Engineer - Reston, VADUTIES:Development of code and experience with the Node.js platform, its tooling, JavaScript, TypeScript and ReactWork in an existing codebase and with a collaborative team.Build enterprise-scale backend REST...SeniorFull timeContract workPart timeWork experience placementRemote work
- ...and Business consulting services. We are in search of a highly motivated candidate to join our talented Team. Job Title: Senior Software Engineer. Location: Reston, VA. Purpose:Performs complex analysis, design, development, automated unit and integration testing,...SeniorWork experience placementImmediate start
$168.1k - $227.4k
Application deadline: Aug 2, 2026Bespoke Solutions is seeking a Senior Software Development Engineer to design, build, and operate a mission-critical, multi-tenant platform for managing large-scale fleets of embedded devices across highly secure and enterprise network...SeniorFull timeInternshipWork at officeFlexible hours- ...Senior Software Engineer ACTIVE TS/SCI CLEARANCE with FS poly REQUIRED TO BE CONSIDERED FOR THIS POSITION Analyzes user interfaces, maintain hardware and software performance tuning, analyze workload and computer usage, maintain interfaces with outside systems, analyze...Senior
- ...RGi is seeking a Senior Backend Engineer to support the development, integration, and deployment of advanced intelligence capabilities into test... ...-critical programs. Projects at RGi span a wide range of software and analytical methodologies and lie at the intersection of...SeniorFull timeImmediate start
$130k - $145k
NVR, Inc. is seeking an experienced Full Stack Senior Software Engineer to work on site in Reston, VA.NVR’s technology teams thrive on providing multiple business lines with the tools and cutting-edge technologies that support NVR’s mission to create a better living experience...Senior- ...and Business consulting services. We are in search of a highly motivated candidate to join our talented Team. Job Title: Senior Software Engineer - Information Technology Position: Oracle Financials - Techno-Functional Consultant Location: Reston, VA ( Remote)...SeniorRemote work
- ...Senior Software Engineer Our client, a Health Insurance company, is looking for a Senior Software Engineer for their Reston, VA/ Hybrid location. Responsibilities: Perform technical detail design, coding, testing of applications. Serves as subject matter...SeniorImmediate start
- ...facilitate the development and implementation of innovative healthcare software solutions, including artificial intelligence (AI) applications... ...integrated into clinical workflows. If you are a software engineer with a passion for improving healthcare for the world, we want...Senior
- ...Senior Software Engineer SZNS Solutions (pronounced "seasons") is a technology consulting company and Google Cloud Partner based in Reston VA. We specialize in delivering agentic AI and cloud computing solutions. Founded by ex-Googlers with engineers from Google, Amazon...Senior
- ...Job Title: Sr Software Engineer Duration: 12 months (possible to hire) Location: Reston, VA(Hybrid)-20191 Job Description: Qualifications To perform this job successfully, an individual must be able to perform each essential duty satisfactorily....SeniorWork experience placement
- ...innovate? At CertiPath you can have both while making the world more secure and simplifying access processes. We are seeking a Senior Software Engineer in Test (SSET) to mature and automate our Test and QA processes, yielding world-class programs that ensure our products...SeniorTemporary workWork experience placementLocal areaFlexible hours3 days per week
- ...Senior Software Engineer Apply now » Date: Aug 7, 2026 Location: Herndon, VA, US, 20171 Company: Hubbell Incorporated Job Overview The Senior Software Engineer develops and tests software systems or applications for software enhancements and new products...SeniorContract workFlexible hours
$94.4k - $198.2k
Job Title: Senior Software Engineer - Architecture & Systems Design Job Category: Engineering Time Type: Full time Minimum Clearance Required to Start: None Employee Type: Regular Percentage of Travel Required: None Type of Travel: None * * * The...SeniorFull timeContract workWork experience placementFlexible hours- ...KYM seeks an experienced Senior Software Engineer to join our development team to support a mission-critical, 24/7/365 software platform. The successful candidate will be responsible for designing, developing, testing, maintaining, and enhancing application capabilities...SeniorHourly payWork experience placementImmediate start
$174.59k - $229.43k
...Senior Software Engineer Join NS2 Mission and help deliver secure, mission-critical technology solutions that enable collaboration across complex operational environments. Mission is looking for a talented Senior Software Engineer to join our team in the Reston, VA...SeniorLocal areaFlexible hours$155.25k - $192.75k
...Senior Software Engineer Sterling, Virginia, United States Join a mission-driven program with high impact on National Security. This isn't just a development role, it's a chance to build solutions that protect what matters most! As a Senior Software Engineer/Developer...SeniorContract workImmediate start- (USA) Senior, Software Engineer Multiple locations Regular/ Permanent Salaried Herndon, VA: $108,000 - $216,000/yr Sunnyvale, CA: $117,000 - $234,000/yr Position Summary... As a Senior Software Engineer at Walmart, you will lead the delivery of scalable software...SeniorPermanent employmentFull timeTemporary workPart time
Do you want to receive more vacancies?
Subscribe and receive similar vacancies to Senior Software Engineer. Be the first to apply!
- software engineer internship Herndon, VA
- software development engineer aws Herndon, VA
- software developer internship no experience Herndon, VA
- real time software engineer Herndon, VA
- financial software developer Herndon, VA
- part time software developer Herndon, VA
- graduate software developer Herndon, VA
- software engineer travel Herndon, VA
- experienced software developer Herndon, VA
- remote entry level software developer Herndon, VA


