Jobs in the United States

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Added 1 hour ago
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Azure Senior AppDev Engineer
Ascend Technologies
Remote, United States
- $140,000 USD / year
The Senior AppDev Engineer is a highly autonomous engineering contributor responsible for delivering complex application features and modernization components across the client platform.…
Added 2 hours ago
Senior Database Developer (3292 RBC)
INSPYR Solutions
Davenport, IA
We are seeking an experienced Senior Database Developer for a temporary engagement supporting a critical legacy system modernization initiative. This role will focus on analyzing existing…
Added 2 hours ago
Tester (Remote)
GovCIO
Madison, WI
This position is in the Continental United States (CONUS) and remote.
Added 3 hours ago
BV
Senior .NET Full Stack Developer
Bright Vision Technologies
Remote, United States
- $100,000 to $150,000 USD / year
We are seeking an experienced Senior .NET Full Stack Developer to design, build, and maintain enterprise-grade web applications and distributed systems built on Microsoft technology stacks.…
Added 4 hours ago
Site Reliability Engineer Team Lead
SilverTech, Inc.
Bedford, NH
Serve as the senior escalation point for hosting-related issues, providing root-cause analysis and long-term solutions.
Added 5 hours ago
Engineering Manager, Trading Platform
Jobgether
Remote, United States
Hands-on technical background in .NET/C# and distributed systems.
Added 11 hours ago
Senior Power Apps/Power BI Developer
Jobgether
Remote, United States
…all applications and next steps. Our partner is looking for a Senior Power Apps/Power BI Developer based in the United…
Added 11 hours ago
IT Applications Senior Developer
Jobgether
Remote, United States
…and monitoring operations. You will build and maintain modern .NET applications, APIs, and integrations while helping shape the technical architecture behind essential business systems.…
Added 13 hours ago
BH
Principal Enterprise Cloud Architect
Banner Health
Remote, United States
- $76.73 to $127.88 USD / hour
…precision, and partnership, creating an environment where a senior architect can meaningfully influence cloud strategy, guide architectural direction, and collaborate with peers who share a…
Added 16 hours ago
Senior Backend Engineer
Fresno Summit Advisors
Remote, United States
We're looking for a Senior Backend Engineer (Java/Spring) to help design, build, and evolve our ecommerce platform. You'll work closely with Product and other engineers to solve complex…
Added 18 hours ago
IT Manager II
CorVel Brand
Portland, OR
Experience supporting .net applications and other Microsoft technologies
Added 20 hours ago
Senior Power Apps/Power BI Developer
i4DM
Remote, United States
Our team is seeking a Senior Power Apps/Power BI Developer to join our fast-growing IT-project based consulting business. We need a team member who is ready to design, architect, and lead…
Added 21 hours ago
Senior .NET Azure Integration Developer
Inabia Software & Consulting Inc.
Remote, United States
We are seeking an experienced Integration Developer to design, develop, deploy, and support enterprise integration solutions for the Journi platform. The ideal candidate will have strong…
Added 21 hours ago
C
Application Integration Engineer
Cotiviti
United States
- $80,000 to $95,000 USD / year
…integrations using AI-assisted development tools, Microsoft .NET, SQL Server, MySQL, Oracle, and related technologies. Works within established architectural frameworks, design…
Added 22 hours ago
TL
Solution Architect Product Engineer/AI
The LaunchCode Foundation
Remote, United States
- $195,000 to $210,000 USD / year
As an AI Product Engineering Principal Architect, you are the senior technical leader responsible for driving the design, delivery, and execution of complex, enterprise-grade AI solutions.…
Added 22 hours ago
IT Applications Senior Developer
Brinks Home
Dallas, TX · Farmers Branch, TX
Brinks Home is seeking an IT Application Senior Developer to help lead the design, development and support of business applications that support our customer order, installation and…
Added 23 hours ago
Senior Systems and Applications Developer, Research and Innovation
University of Nevada, Reno
United States
The University of Nevada, Reno seeks a Senior Systems and Applications Developer to lead the development, integration, and support of enterprise applications, databases, reporting…
Added 1 day ago
Senior AI Full Stack Developer
Inabia Software & Consulting Inc.
Harrisburg, PA
We are seeking a highly experienced, hands-on Senior Full Stack Developer with at least 10 years of professional software development experience to design, develop, integrate, and maintain…
Added 1 day ago
Senior Cloud Data Architect
Leidos
Remote, United States
Knowledge and understanding of programming languages like Python, Spark, and .NET based development
Added 1 day ago
SI
Senior Application Developer
SOS International LLC
Fort Belvoir, VA
- $140,000 to $155,000 USD / year
SOSi is seeking a highly qualified Senior Application Developer to join our team 100% on site in Fort Belvoir, VA , in support of our government customer. In this role, the Senior…
Added 1 day ago
Senior Software Engineer, Integrations & Data
Wilks Brothers, LLC
Fort Worth, TX
This is an in-office role based at Equify's offices in Fort Worth, Texas. It is not eligible for remote or hybrid work.
Added 1 day ago
RH
Sr. Software Engineer
Robert Half
Remote, United States
- $140,000 to $170,000 USD / year
We are looking for a Senior Software Engineer to join our team. This is a fully remote role that will help design scalable, secure software solutions across web services and user-facing…
Added 1 day ago
S
Senior Software Engineer
Saint-Gobain
FARIBAULT, MN
- $92,000 to $142,000 USD / year
We are seeking an experienced Senior Software Engineer to lead the design, development, integration, and implementation of enterprise business solutions. This role reports to the Business…
Added 1 day ago
Sr Manager, Software Development & Engineering Senior
Charles Schwab Inc.
Westlake, TX
…reliability and maintainability. Collaborate with architects and senior engineers to define technical designs and document solution approaches that align with enterprise standards and…
Added 1 day ago
Senior Lead Full Stack Developer
TISTA Science and Technology Corporation
Remote-United States
TISTA Science and Technology is seeking a Senior Lead Full Stack Developer to join our growing team.

SOS International LLC

Senior Application Developer

Fort Belvoir, VA, United States

$140,000 to $155,000 USD / year

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Job details

Pay: $140,000 to $155,000 USD / year
Posting language: English
Posted: Oct 28, 2026

Original job description

Fort Belvoir, VA, USA

Full-time

Clearance Requirement: Top Secret

Compensation: USD 140000 - USD 155000 - yearly

Company Description

Founded in 1989, SOSi is among the largest private, founder-owned technology and services integrators in the defense and government services industry. We deliver tailored solutions, tested leadership, and trusted results to enable national security missions worldwide.

Job Description

Overview:

SOSi is seeking a highly qualified Senior Application Developer to join our team 100% on site in Fort Belvoir, VA , in support of our government customer. In this role, the Senior Application Developer will serve as a technical expert responsible for the design, development, integration, and maintenance of complex software applications. The position requires a strong proficiency in .NET Core and extensive experience supporting the operation, enhancement, and modernization of the ITCD (Information Technology and Compliance Directorate) family of applications. The ideal candidate excels in system integration, collaborates effectively across teams, delivers high‑quality solutions, and provides mentorship to junior developers. This role is best suited for someone who is proactive, detail‑oriented, and committed to building reliable and scalable systems.

Essential Job Duties:

Design, develop, test, and maintain high‑performance software applications.
Analyze business requirements and translate them into technical specifications.
Lead the architecture and design of application components and integrations.
Review code for accuracy, quality, and adherence to best practices.
Troubleshoot and resolve complex technical issues across the application stack.
Collaborate with cross‑functional teams, including product managers, QA, and DevOps.
Contribute to process improvements, automation, and development standards.
Mentor junior developers and support team knowledge sharing.
Stay current with emerging technologies and recommend solutions when appropriate.
Support the project manager in overseeing project operation, planning, and execution.
Formulate objectives and levels of effort through research and fact-finding with customer representatives and project managers.
Be responsible for the software development life cycle from planning to implementation to testing and documenting, to deployment and maintenance.
Assist the project manager and client in developing a schedule/timeframe for each project to ensure each one is executed efficiently and in a timely manner.
Create and maintain complete and accurate documentation on all supported applications.
Oversee technical issues related to the operation, maintenance, and modification of GOTS application.
Work with customer stakeholders to design or customize software with a focus on optimizing operational efficiency.
Apply knowledge of hardware and/or software engineering principles.
Design and/or customize software for client use to optimize operational efficiencies.
Monitor application performance and perform application changes to optimize performance.
Analyze and design GOTS applications and systems with a focus on improving functionality and stakeholder usability.
Provide evaluations and recommendations of GOTS applications and systems to provide solutions to complex technical challenges.
Follow all applicable agency policies, procedures, and regulations.
Provide technical guidance to lower-level developers and engineers.

Qualifications

Bachelor’s degree or postgraduate degree in engineering, scientific, technical, or business management disciplines from an accredited college or university.
A minimum of 5 years of technical supervisory experience in an application/software development environment.
An active in scope Top Secret security clearance, or Secret with the ability to obtain a Top Secret.
Experience with GOTS applications such as ARMIS, AAO, ACOTD, FACTS, MDR, or ADAMS.
Experience with Microsoft SQL and the .NET framework.
Experience with Configuration Management processes including Change Control Boards (CCB).
Ability to schedule, track, and perform across multiple concurrent projects.
Must have demonstrated the ability to communicate with a variety of stakeholders in multiple formats.
Must possess baseline and computing environment certifications for IAT-II IAW DoD 8570.01-M (CCNA-Security, CySA+, GICSP, GSEC, Security+, CND, or SSCP).
5–8+ years of professional experience in software or application development.
Strong proficiency in modern programming languages and frameworks (such as C#, JavaScript, .NET, or similar).
Hands-on experience with cloud platforms and services (AWS, Azure, or GCP).
Proficiency with REST APIs, microservices, and application integration patterns.
Solid understanding of relational and NoSQL databases.
Experience with CI/CD pipelines, version control systems, and automated testing.
Strong analytical, problem‑solving, and communication skills.
Ability to work independently while supporting team goals.

Additional Information

Work Environment:

100% on government site within Fort Belvoir, VA.
Normal office conditions.
Core hours of operation are Monday through Friday, 0600 – 1700.
No hybrid or remote availability.
Compensation: $140K - $155K yearly.

Working at SOSi:

All interested individuals will receive consideration and will not be discriminated against for any reason.

SOSi is an equal employment opportunity employer and affirmative action employer. All interested individuals will receive consideration and will not be discriminated against on the basis of race, color, religion, sex, national origin, disability, age, sexual orientation, gender identity, genetic information, or protected veteran status. SOSi takes affirmative action in support of its policy to advance diversity and inclusion of individuals who are minorities, women, protected veterans, and individuals with disabilities.

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