Jobs in the United States

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IT Systems Engineer
SAIC
San Diego, CA
Must have an Active Secret Clearance to start
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Automation Validation Engineer
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Quality Engineer
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Cleveland, OH
- $32 to $38 USD / hour
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Minneapolis, MN
- $55 to $70 USD / hour
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- $143,926 to $176,300 USD / year
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Chicago Showroom Manager
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Unissant

Senior Software Engineer

Washington, DC, United States

$142,000 to $174,000 USD / year

Apply on unissant.applicantpro.com About employer

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Job details

Pay: $142,000 to $174,000 USD / year
Experience: 6-10 years of experience delivering complex enterprise software changes and maintaining production business applications.
Posting language: English
Posted: Nov 13, 2026

Original job description

Unissant, Inc. delivers innovative capabilities to the agencies that keep our nation healthy and safe. We apply our domain expertise, data acumen, and technology know-how to achieve breakthrough results for our clients. Working collaboratively, we advance missions and careers through a focus on honesty, integrity, and dependability. We continuously look for talent, excited to join that effort. To learn more about our exciting organization, please visit us at www.unissant.com.

Unissant is seeking a Senior Software Engineer - A to support a newly awarded program for a federal health agency. Lead implementation of complex application changes and integrations, review engineering quality, and mentor developers supporting assigned business application systems.

The ideal candidate brings practical delivery experience, sound judgment, and a collaborative approach to maintaining Federal business applications while improving technical capability.

Essential Duties and Responsibilities:

Design and implement complex application components, service integrations, and business logic within approved architecture.
Analyze legacy code and dependencies to recommend practical refactoring and modernization increments.
Review code and designs for correctness, security, performance, accessibility, and maintainability.
Develop automated tests for complex scenarios and work with testers to address regression and integration risks.
Resolve difficult defects and production incidents, document root causes, and implement durable corrective changes.
Mentor engineers, refine technical estimates, and coordinate implementation tasks with the technical lead.
Support CI/CD adoption, controlled deployments, rollback planning, and operational knowledge transfer.
Support transition knowledge transfer and maintain current technical or process documentation for assigned responsibilities.
Coordinate assigned work with program leadership, Government stakeholders, and related teams; report blockers and dependencies promptly.
Use Government-approved tools and handle program data within authorized environments. Validate any AI-assisted output before it informs delivery decisions.

Work Experience and Job Skills:

Basic Qualifications:

6-10 years of experience delivering complex enterprise software changes and maintaining production business applications.
Strong development expertise in the assigned stack, which may include Java or .NET and relational databases.
Experience designing and troubleshooting APIs, application integrations, and distributed dependencies.
Ability to lead code reviews, mentor engineers, and make implementation tradeoffs with supporting rationale.
Experience with automated testing, source control, CI/CD, and secure development practices.
Ability to diagnose complex production issues and communicate technical impacts to delivery leadership.
Ability to document work clearly, protect sensitive program information, and collaborate across Government and contractor teams.
Ability to meet federal suitability and access requirements and provide on-site support in the Bethesda, Maryland area as directed.

Additional Qualifications:

Federal application modernization, cloud migration, or shared service integration experience.
Experience breaking legacy components into maintainable services with reliable rollback options.
Experience validating AI-generated code and measuring improvements in delivery quality.
Experience supporting a Federal IT services environment, preferably within a federal health agency or comparable federal IT environment.
Experience transferring knowledge from an incumbent team and maintaining reliable services during transition.

Education:

A degree or relevant coursework in computer science, information systems, engineering, or a related discipline is preferred.

Certificates, Licenses and Registrations:

Relevant cloud, development, or platform credentials are preferred.

Communication Skills:

Clear verbal and written communication skills, with the ability to coordinate professionally across Government, prime contractor, and subcontractor teams.
Ability to explain role-specific findings, document decisions and procedures, and communicate risks and recommended actions to the appropriate audience.

Clearance Requirements:

Must hold or be eligible for a Public Trust Moderate (Tier 2) background investigation and meet applicable federal suitability, badging, and system-access requirements.

Travel:

Washingtong, DC.

Environmental Requirements:

Mainly a routine office environment.
May be required to lift up to ten (10) pounds
Flexible in working extended hours

The above statements are intended to describe the general nature and level of work being performed by the individual(s) assigned to this position. They are not intended to be an exhaustive list of all duties, responsibilities, and skills required. Unissant management reserves the right to modify, add, or remove duties and to assign other duties as necessary. In addition, where applicable and available, reasonable accommodation(s) may be made to enable individuals with disabilities to perform essential functions of this position.

Candidate(s) will be required to go through pre-employment screening.

Unissant, Inc. is a proud Equal Opportunity Employer! (EOE; M/F/Disability/Vets)

Apply on unissant.applicantpro.com About employer

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Jobs in the United States