UNKNOWN

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HOUR

This role is heavily centered on Java backend development, application modernization, cloud readiness, and integration work, helping transform legacy systems into scalable, cloud-native solutions. We are seeking a Lead Software Engineer to support a multi-year cloud modernization initiative focused on migrating enterprise applications from on-premises and mainframe environments to AWS.

Every day, System One focuses on services and solutions that require a high degree of specialization, in-demand technical skills, and large-scale operational expertise. We are essential partners to those on the front lines of our nation’s most critical infrastructure, technology, and life sciences initiatives. 
Founded more than 40 years ago as a staffing partner to the engineering industry, today System One is a diversified organization operating in over 50 locations and putting more than 9,000 people to work in the United States, Canada, and the United Kingdom.

System One

Lead Software Engineer

YEAR

The ideal candidate will possess advanced software engineering expertise, strong development skills, and the ability to mentor team members while contributing hands-on to complex technical initiatives. We are seeking an experienced Senior Software Engineer to provide technical leadership and drive the design, development, and delivery of mission-critical software solutions.

Senior Software Engineer C#

Experience building enterprise software systems that run in Azure Cloud environment using technologies such as Azure Container Apps (or AKS), Azure Functions, Azure Queue Storage (or Service Bus Queues), Azure Service Bus Topics (or Event Grid), Azure Blob Storage, Azure API Management, Azure Cosmos DB (Table API), Azure AI Search, Azure Database for PostgreSQL – Flexible Server, Azure Cosmos DB (Gremlin API), Azure Cosmos DB (MongoDB API), Azure Bicep (or Azure CDK). This is an engineering role that works as part of the software engineering team towards the development and deployment of enterprise and informatics software systems to support cancer clinical trials and research.

C#/.Net Software Engineer

There is a different range applicable to specific work locations, within the San Francisco Bay area and New York City metropolitan area, and the base pay range for this role in those locations is USD $133,800 - $219,200 per year. As a Software Engineer II in Microsoft’s Sovereign Cloud Security team, you’ll help design, deliver, and secure highly reliable services that underpin both internal security platforms and customer‑facing cloud offerings.

DO WHAT YOU LOVE Make your mark on the world’s most used technologies. Develop the next hit mobile application. Pioneer a startup that could be the next big thing. At Microsoft, you choose your path. Headquartered in Redmond, Washington, Microsoft is a top innovator in both the consumer and enterprise technology industry. Just a few of the many things our products do are unleash creativity, connect businesses, and make learning more fun. But our continued success is based on one thing: our employees. We hire amazing, talented people and give them the opportunities—and the tools—to succeed. WHY MICROSOFT? As a Microsoft employee, you’re surrounded by a diverse group of the smartest people in your field. This fosters new ideas, better business results, and creates a dynamic work environment. In the office, you’re constantly challenged and supported by your colleagues. Every day holds something new and exciting. We also offer unparalleled depth and breadth of career opportunities. As an industry leader in multiple fields, working for Microsoft means being able to do whatever you feel passionate about—and being able to make an impact in that field. From day one, we give our employees significant responsibility. This means that you’ll know that you directly contributed to something that has a positive impact on people worldwide. Whether you choose to work in management, dive deep into the newest technology, or explore multiple professions, you’ll find everything you need at Microsoft to drive your career—and to make a difference. WE GET IT – YOU’RE MORE THAN YOUR JOB Everyone works differently and is motivated by different things. We also understand that there’s more to you than your job. That’s why we offer competitive pay and a wide assortment of benefits-- to help you make the most of life at work and away from it. GET THE BALL ROLLING

Microsoft

Software Engineer II - CTJ - Poly

Ivy Exec

Candidates will work across the full software development lifecycle, supporting Java development, AWS GovCloud, DevSecOps, AI-driven test automation, and cloud platform migration initiatives. We are seeking experienced Software Engineers at multiple levels to support the development, deployment, and maintenance of mission-critical cloud-based applications.

Software Engineer (Java / AWS GovCloud / DevSecOps)

FEED

Develop and enhance server-side frameworks and modules for a web-based Learning Management System (LMS), including Java Servlets , JSPs , Tomcat integration, data parsing, and backend workflow logic. When program needs and funding align, you may also have opportunities to contribute to other Tactical Signature Guidance (TSG) systems —providing exposure to state-of-the-art technologies that directly support the development of advanced sonar tactical decision aids (TDAs) .

Everything we do is built on our commitment to do the right thing for our customers, our employees, and our communities. Learn more about the values and culture that are the foundations of our business.

Leidos

Software Engineer (Learning Management System – Mid-Level)

Appcast Exclusive 1

This is a high-impact, ownership-heavy role: youll define IAM architecture from the ground up, migrate Okta fully behind Terraform, and serve as the subject matter expert who levels up the entire organization on IAM best practices. Were looking for a Security Software Engineer to join our Security team and own Vercels Identity and Access Management strategy - across both corporate and production environments.

Vercel

Security Software Engineer, IAM

Leveraging JavaScript/TypeScript, Node.js, SQL and NoSQL cloud-native databases, and AWS, you will develop innovative solutions for user, group, and membership management while ensuring the highest levels of security and reliability. • Strong knowledge of security architecture, LDAP, Active Directory, SAML, SSO, OAuth2, OpenID Connect and web protocols like XML, SOAP, JSON, and REST.

Software Engineer, Backend

Masters Degree in Computer Science or related technical field AND 6+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR Bachelors Degree in Computer Science or related technical field AND 8+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python. There is a different range applicable to specific work locations, within the San Francisco Bay area and New York City metropolitan area, and the base pay range for this role in those locations is USD $160,200 - $261,000 per year.

Sr. Software Engineer - CTJ - Poly

Masters Degree in Computer Science or related technical field AND 6+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR Bachelors Degree in Computer Science or related technical field AND 8+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR equivalent experience. You will work on distributed systems that enable Power Platform services to function in isolated, air‑gapped environments, partnering with Public Cloud teams to bring features to parity while ensuring those features meet the constraints of sovereign deployments.

Sr. Software Engineer -CTJ- Poly

The Management Plane team is responsible for building the main experience of the platform, including the public-facing APIs users consume to configure, observe, and interact with the mesh, as well as the main workflows and processes that provide multi-tenancy and security to our hybrid and multi-cloud service mesh. • Collaborate closely with product management, UX, and cross-functional teams to design and implement public APIs that will be used to configure all the aspects of a service mesh: networking, security, and observability.

Tetrate

Senior Software Engineer (Go)

The ideal candidate is a hands-on engineer who has a deep system-level understanding of what it takes for robots to operate in unstructured environments, handle dynamic obstacles, safely work around people, and work reliably with limited networking and power infrastructure. Experience developing cloud-connected robotics software workflows (e.g., Azure, Azure DevOps, AWS), web-based operator interfaces (e.g., React, JavaScript/TypeScript), and real-time video-streaming pipelines (e.g., GStreamer).

HITT Contracting

Robotics Software Engineer - Construction

Veraxx has a high level of expertise in flight simulation hardware and software development, as well as computer architecture, tactical environments, interoperability (HLA/DIS), avionics systems, graphics and real-time embedded systems. Candidate will have the opportunity to work on a variety of flight simulators and develop/integrate software in areas such as avionics, tactical environments, interfaces to audio, visual, motion, and I/O systems, and Instructor Operator Stations (IOS).

By Light Professional IT Services

Senior Software Simulation Engineer

Masters Degree in Computer Science or related technical field AND 3+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR Bachelors Degree in Computer Science or related technical field AND 5+ years technical engineering experience with coding in languages including, but not limited to, C, C++, C#, Java, JavaScript, or Python OR equivalent experience. If you love solving challenging problems, developing scripts and/or automation to solve said problems, and are passionate about operating and automating robust, reliable, highly distributed software systems using the latest cutting-edge technologies, then let’s talk.     .

Software Engineer II - CTJ - POLY

We are looking for an experienced Principal Software Engineer who will be responsible for developing and maintaining our flagship product assets. • Secure our software by addressing any vulnerabilities and by writing high-performing, scalable, and secure software to meet customer demands.

Kastle Systems

Principal Software Engineer

As a Kastle Systems Software engineer, you will have an opportunity to contribute to our award winning* highly available and distributed platform that is deployed on platforms ranging from microcontrollers, headless Linux IoT controllers, datacenters, and the AWS and Azure clouds. This position will play a hands on role in building and supporting the internal Kastle toolset that is used 24/7 by Kastle operations staff to provide the highest level quality of service and support to our customers.

Full Stack Software Engineer

We are looking for an experienced Embedded Software Engineer responsible for architecture, design, development & testing of CheckVideo’s flagship product assets. This is a hybrid position out of Falls Church, VA that offers an opportunity to work on the cutting edge of technology with a great team and make meaningful contributions every single day.

Embedded Software Engineer

The position is well suited for an engineer who enjoys working with complex systems, troubleshooting production issues, and contributing to the continued evolution and sustainability of the platform. This role focuses on supporting, enhancing, and progressively modernizing enterprise and legacy applications using C#, NET Framework, and SQL Server.

Sarnova

Software Engineer - Digitech

Our client is seeking a Senior Software Engineer to support the development of modern, cloud‑based SaaS applications for a technology‑focused financial software client. Codeworks, an LRS company, is seeking a Senior Software Engineer for a direct‑hire, fully remote opportunity supporting one of our client partners.

Levi, Ray & Shoup

Senior Software Engineer - Remote

Develop industry leading cloud friendly desktop and enterprise class software for common defense and intelligence workflows involving data formats such as NITF, GeoTIFF, and MISB compliant video (FMV). In this role, you will collaborate with a talented team of software developers and product engineers to create, build, test, and release advanced software technologies focused on imagery users.

We show people how to make the world work better with maps and apps. We are the best in our fields from all walks of life and all over the world. We come together in small teams to make big ideas happen. With our GIS technology, anything is possible. Come join us.

Software Engineer Jobs in Fairfax, VA

Lead Software Engineer System One

Senior Software Engineer C# System One

C#/.Net Software Engineer System One

Software Engineer II - CTJ - Poly Microsoft

Software Engineer (Java / AWS GovCloud / DevSecOps) System One

Software Engineer (Learning Management System – Mid-Level) Leidos

Security Software Engineer, IAM Vercel

Software Engineer, Backend Vercel

Sr. Software Engineer - CTJ - Poly Microsoft

Sr. Software Engineer -CTJ- Poly Microsoft

Senior Software Engineer (Go) Tetrate

Robotics Software Engineer - Construction HITT Contracting

Senior Software Simulation Engineer By Light Professional IT Services

Software Engineer II - CTJ - POLY Microsoft

Principal Software Engineer Kastle Systems

Full Stack Software Engineer Kastle Systems

Embedded Software Engineer Kastle Systems

Software Engineer - Digitech Sarnova

Senior Software Engineer - Remote Levi, Ray & Shoup

Sr. Software Development Engineer – National Imagery Esri

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