Jobs in the United States

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Added 7 days ago
Senior Software Engineer (Institutional, Financing)
Coinbase
Trenton, NJ
Drive engineering excellence by improving developer tooling, testing infrastructure, monitoring, and operational reliability across financing systems.
Added 7 days ago
WI
(USA) Principal, Software Engineer
Walmart Inc.
United States
- $143,000 to $286,000 USD / year
Strong proficiency in software development lifecycle management, including CI/CD, testing, monitoring, and incident response.
Added 7 days ago
Senior/Principal Cybersecurity - Software and AI Security, Onsite
Sandia National Laboratories
Albuquerque, NM
Evaluate, test, and integrate modern security tooling, including static and dynamic application security testing (SAST/DAST) and automated vulnerability detection systems.
Added 7 days ago
EG
Senior Java Full-Stack Developer
Eliassen Group
Santa Fe, NM
- $70 to $80 USD / hour
Our client is seeking a Senior Java Full-Stack Developer to design, build, and support scalable software solutions across the full application stack. This individual will work as part of a…
Added 7 days ago
Resource Control Team Software Engineer (Level 1 or 2) - AHT
Northrop Grumman
Manhattan Beach
Background in software integration, system level testing, and regression testing for medium to large code bases.
Added 7 days ago
EG
Senior Java Full-Stack Developer
Eliassen Group
Des Moines, IA
- $70 to $80 USD / hour
Our client is seeking a Senior Java Full-Stack Developer to design, build, and support scalable software solutions across the full application stack. This individual will work as part of a…
Added 7 days ago
Senior Software Engineer - AL/ML Platforms
Nike
Beaverton, OR
Programming experience with at least one modern language such as Java, Python, Golang
Added 7 days ago
Software Engineer Principal
Syms Strategic Group, LLC (SSG)
Raleigh, NC
Security Clearance Requirements Must possess or qualify for a Public Trust (MBI)
Added 7 days ago
Software Systems Engineer Principal
Syms Strategic Group, LLC (SSG)
Raleigh, NC
Security Clearance Requirements Must possess or qualify for a Public Trust (MBI)
Added 7 days ago
C
Sr. AWS Data Engineer (Java, Python & Generative AI)
Cognizant
Charlotte, NC
- $90,000 to $105,000 USD / year
Develop and support Java-based REST APIs, preferably using Spring Boot, to enable secure and reliable data access.
Added 7 days ago
EG
Senior Java Full-Stack Developer
Eliassen Group
Raleigh, NC
- $70 to $80 USD / hour
Our client is seeking a Senior Java Full-Stack Developer to design, build, and support scalable software solutions across the full application stack. This individual will work as part of a…
Added 7 days ago
Web Developer Lead
B&H Photo
New York, NY
The Web Developer Team Lead creates advanced to highly complex code structures using Java technologies and SQL Query languages. Possessing an expert knowledge of multiple web programming…
Added 7 days ago
Software Engineer, Lead
The MITRE Corporation
Aberdeen, MD
Must have an active Secret U.S Government issued Security Clearance
Added 7 days ago
UO
Advanced Lab Manager (4758C) - Physics #89878
University of California, Berkeley
CA
- $93,354.48 to $172,092.96 USD / year
…activities including conception, design, construction, and testing of experiments, as well as documentation and editing of instructional materials. The two courses managed by this position…
Added 7 days ago
UG
Senior Software Engineer
UnitedHealth Group
Eden Prairie, MN
- $91,700 to $163,700 USD / year
areas, a minimum of four days per week in the office are required
Added 7 days ago
Spring Migration Engineer
NTT DATA Americas, Inc.
Austin
Lead the end-to-end migration of legacy Java applications to Spring and Spring Boot with minimal disruption to business operations.
Added 7 days ago
SO
IT Application Development (Senior Specialist)
State of Washington
Olympia, WA
- $99,300 to $133,608 USD / year
Eleven (11) years of progressively more complex problem solving as a developer designing, developing or maintaining large-scale applications with mission critical business functions using…
Added 7 days ago
SO
IT System Administration - Senior/Specialist
State of Washington
Olympia, WA
- $8,522 to $11,460 USD / month
Seven years of progressively complex problem-solving experience developing, maintaining, and/or deploying .NET and Java-based applications and SQL databases.
Added 7 days ago
Senior Application Developer (Candidates must have experience with Informatica)
Highmark Health
Jefferson City, MO
+ Certification such as JAVA Developer, DB2 Certification, Cognos Certification
Added 7 days ago
UI Developer
Koniag Government Services
Vienna, VA
This developer would be responsible for development and maintenance of web applications and services. Responsibilities could include all aspects of the software development life cycle…
Added 7 days ago
Okta Identity Developer - Mid
Koniag Government Services
Washington, DC
Koniag Operations Services, LLC (KOS), a Koniag Government Services company, is seeking an experienced Okta Identity Developer (Mid) to support enterprise identity and access management…
Added 7 days ago
Senior Software Engineer
Koniag Government Services
Washington, DC
The ideal candidate will work in an AWS cloud environment, utilizing cutting-edge technologies. The developer will collaborate with both government and contractor teams to support all…
Added 7 days ago
Senior Tester/Business Analyst
Koniag Government Services
Washington, DC
…performing end-to-end functional, integration, regression, and UAT testing while also supporting requirements refinement, backlog grooming, and user engagement activities in coordination…
Added 7 days ago
Senior Full-Stack Software Engineer
Koniag Government Services
Washington, DC
The Senior Full-Stack Software Engineer to support the development of the FBI FDP system using a Postgres/Java/React technology stack. These engineers will work with an existing development…
Added 7 days ago
SailPoint Support Engineer (REMOTE)
Koniag Government Services
Scott Air Force Base, IL
Participate in change management processes, including planning, testing, and implementing changes to the SailPoint environment.

Closed listing

Koniag Government Services

Java/.net Modernization Engineer

Washington, DC, United States

This opening has closed.

The original listing is kept below for reference.

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Job details

Posting language: English
Posted: Oct 29, 2026

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Original job description

Archived listing. The details below describe a past opening.

Tuknik Government Services, LLC, a Koniag Government Services company, is seeking a Java/.net Modernization Engineer with a Secret security clearance to support TGS in supporting our government customer in the DC Metro area. This position is for a Future New Business Opportunity.

Benefits include medical, dental, and vision insurance, 401(k) retirement plan, paid time off, paid parental leave, life and disability insurance, flexible spending accounts, commuter benefits and tuition reimbursement.

Tuknik Government Services, LLC, Koniag Government Services (KGS) is seeking qualified candidates for this role supporting our U.S. Army customer on a large-scale Army contracting systems modernization and automation program. Analyzes and decouples legacy Java and .NET components supporting solution integrations. The engineer preserves required behavior and interfaces while helping the team retain, wrap, refactor, replace, or retire each component through controlled migration waves. This is a contingent recruiting profile; the opening, employing subsidiary, compensation, work location, and staffing remain subject to final contract authorization.

Essential Functions, Responsibilities & Duties may include, but are not limited to:

Inventory legacy Java and .NET applications, services, libraries, jobs, interfaces, dependencies, configurations, and operational procedures.
Trace business rules, calculations, transformations, data access, authentication, error handling, and external dependencies in legacy code.
Recommend retain, wrap, refactor, replace, or retire dispositions based on mission need, security, supportability, performance, and lifecycle cost.
Develop API facades and compatibility adapters that preserve external contracts while target Appian capabilities transition.
Refactor approved services into modular, testable components or bounded external services where Appian-native implementation is not appropriate.
Eliminate unsupported libraries, embedded credentials, obsolete protocols, and high-risk custom code through approved designs.
Create unit, integration, contract, regression, and security tests that compare modernized behavior with the legacy baseline.
Support data migration, parallel operation, deployment, cutover, rollback, stabilization, and legacy retirement.
Package code through the approved DevSecOps pipeline and resolve code-quality, dependency, vulnerability, and licensing findings.
Maintain technical designs, interface specifications, dependency maps, release notes, and operational documentation.

Education and Experience Required:

Bachelor's degree in computer science, engineering, information systems, or a related field; additional relevant experience may substitute for education.
Five or more years of enterprise software engineering experience using Java, .NET/C#, or both.
Experience modernizing legacy applications, decomposing tightly coupled services, and preserving APIs, business rules, and data behavior.
Experience with relational databases, REST/SOAP services, secure coding, automated testing, CI/CD, and production troubleshooting.
U.S. citizenship and the active security clearance or eligibility required for the assigned work by the start of performance, with ongoing eligibility thereafter.
Ability to communicate clearly with Government, technical, and business stakeholders and to maintain accurate work records in approved systems.
Ability to protect Controlled Unclassified Information and classified information, when assigned, and comply with required access, training, and handling procedures.

Education and Experience Desired:

Experience integrating conventional code with Appian or another low-code platform.
Experience with Spring, ASP.NET, containers, AWS, Oracle, S3, or enterprise document and reporting systems.
Experience modernizing Federal acquisition, financial, or other regulated applications.

Required Skills and Competencies:

Java and .NET enterprise development
Legacy analysis and incremental refactoring
API facades and compatibility engineering
Automated testing and secure DevSecOps
Migration, cutover, and production support

Work Environment and Travel:

Work may occur remotely when authorized, at Government facilities, or in controlled office and data-center environments. Work involving classified information or SIPRNet will be performed at a Government-approved secure location using authorized systems. The role generally supports Government business hours, with occasional release, incident-response, maintenance-window, or approved travel requirements. Reasonable accommodations may be made to enable qualified individuals with disabilities to perform the essential functions.

Our Equal Employment Opportunity Policy

The company is an equal opportunity employer. The company shall not discriminate against any employee or applicant because of race, color, religion, creed, ethnicity, sex, sexual orientation, gender or gender identity (except where gender is a bona fide occupational qualification), national origin or ancestry, age, disability, citizenship, military/veteran status, marital status, genetic information or any other characteristic protected by applicable federal, state, or local law. We are committed to equal employment opportunity in all decisions related to employment, promotion, wages, benefits, and all other privileges, terms, and conditions of employment.

The company is dedicated to seeking all qualified applicants. If you require an accommodation to navigate or apply for a position on our website, please get in touch with Heaven Wood via e-mail at accommodations@koniag-gs.com or by calling 703-488-9377 to request accommodations.

Koniag Government Services (KGS) is an Alaska Native Owned corporation supporting the values and traditions of our native communities through an agile employee and corporate culture that delivers Enterprise Solutions, Professional Services and Operational Management to Federal Government Agencies. As a wholly owned subsidiary of Koniag, we apply our proven commercial solutions to a deep knowledge of Defense and Civilian missions to provide forward leaning technical, professional, and operational solutions. KGS enables successful mission outcomes for our customers through solution-oriented business partnerships and a commitment to exceptional service delivery. We ensure long-term success with a continuous improvement approach while balancing the collective interests of our customers, employees, and native communities. For more information, please visit www.koniag-gs.com.

Equal Opportunity Employer/Veterans/Disabled. Shareholder Preference in accordance with Public Law 88-352

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Jobs in the United States