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ZipStaff is seeking an experienced Senior Software Developer with expertise in IBM iSeries (AS/400) and RPG to support critical backend systems for a major healthcare analytics and payment integrity organization. You will modernize RPG codebases using Agile methodologies, CI/CD pipelines, and automated testing while exposing high-volume DB2 datasets to web applications.

ZipStaff Inc.

Senior Software Developer – IBM i / RPG

Betterteam

The Hybrid Architecture and Development for Experimental Systems (HADES) Program provides maintenance, sustainment, development, integration, and test support for ground systems supporting experimental mission capabilities at the Research, Development, Test, and Evaluation (RDT&E) Support Complex at Kirtland AFB, NM. The program supports existing capabilities and the development, integration, testing, and deployment of capabilities supporting new mission partners and emerging mission requirements within TS/SCI and Special Access Program (SAP) environments.

YEAR

La Jolla Logic, Inc

Senior Software Developer

This role involves developing and maintaining robust, scalable software; integrating simulation systems across distributed architectures; and collaborating with developers, systems engineers, and subject matter experts to meet Navy training objectives. As part of the Navy Continuous Training Environment (NCTE) Software Engineering team, this engineer contributes to the design, implementation, testing, and sustainment of modeling and simulation systems that enable Live, Virtual, and Constructive (LVC) Fleet training.

Huntington Ingalls Industries is America’s largest military shipbuilding company and a provider of professional services to partners in government and industry. For more than a century, HII’s Newport News and Ingalls shipbuilding divisions in Virginia and Mississippi have built more ships in more ship classes than any other U.S. naval shipbuilder. HII’s Technical Solutions division provides a wide range of professional services through its Fleet Support, Integrated Missions Solutions, Nuclear & Environmental, and Oil & Gas groups. Headquartered in Newport News, Virginia, HII employs nearly 37,000 people operating both domestically and internationally.

Huntington Ingalls Industries Inc

Navy Training Baseline Developer (Engineer Software 3) 30175

Familiarity with software development practices and modern computing environments, including Git-based version control, SQL databases, APIs, Linux, cloud platforms such as Microsoft Azure or AWS, virtualization, containerization, and secure coding principles. Founded in 1986 and headquartered in Long Island, NY, ASR serves its clients with a full spectrum of complex professional and technical support services including Construction Management, Engineering, Logistics, Project Management and Quality Control across the U.S. and in more than 40 countries worldwide.

ASR International Corp

Junior Software Developer

Abile Group, founded in July 2004 to support the Intelligence Community and its contractors across Enterprise Analytics, IT & Systems Engineering, and Program & Project Management, merged with Valiant Solutions in January 2026 - an established provider of cybersecurity technologies and services for Federal Agencies since 2005. With significant experience serving the Federal Government, we remain dedicated to our employees and clients and seek high‑performing professionals who excel at providing guidance, developing solutions, and delivering implementation support that blends industry best practices with client expertise and Abile’s broad technical capabilities.

Abile Group, Inc.

Software Developer, Senior

[AW]-iCims

The Senior Developer will design and implement logical, functional software code across multiple programming languages, make informed technology choices for different environments, develop and integrate data fabric and data fusion capabilities, and rapidly diagnose and correct complex software issues in mission-critical systems. Evaluate and recommend technologies and patterns for data fabric (e.g., messaging backbones, data catalogs, streaming platforms, common data models) and data fusion (e.g., frameworks, libraries, services).

Parsons is a technology-driven engineering services firm with more than 70 years of experience in the engineering, construction, technical, and professional services industries. The corporation is a leader in many diversified markets with a focus on infrastructure, defense, security, and construction. Parsons delivers design/design-build, program/construction management, systems design/engineering, cyber/converged security, and other professional services packaged in innovative alternative delivery methods to federal, regional, and local government agencies, as well as to private industrial customers worldwide.

Parsons

Senior Software Developer (Data Fabric/ Data Fusion)

The Senior Developer will design and implement logical, functional software code across multiple programming languages, make informed technology choices for different environments, implement and interpret system metrics and telemetry, and rapidly diagnose and correct complex software issues in mission-critical systems. Evaluate and recommend telemetry, logging, and metrics frameworks and platforms (e.g., time-series databases, observability tools, APM solutions) suited to mission and deployment environments.

Senior Software Developer (Metric/Telemetry

In this role, you will be a key member of a collaborative development team of engineers and software developers, working together to assess systems and develop medium-to-high fidelity software models of real-world threat weapon systems that accurately capture the capabilities and limitations of both emerging and fielded systems. What Required Skills You'll Bring: Bachelor's degree in Electrical Engineering, Computer Engineering, Computer Science, or a related field with 20+ years of relevant experience.

Parsons Commercial Technology Group Inc.

Expert M&S Software Developer

ea_via_bold

As a Staff-level individual contributor, you will drive the automation that diagnoses and fixes pipeline failures, such as deciding whether a failed CI job is a real regression, a flaky card, or an infrastructure issue, and identifying which merge broke an overnight test run. You will blend modern AI techniques with traditional software automation to build highly reliable systems, and shape the architecture for compute and storage across an environment that spans cloud to on-prem, from firmware updates to rack-scale performance testing.

D-Matrix

Staff Software Engineer, Developer Automation

In this role, you will be a key member of a collaborative development team of engineers and software developers, working together to assess systems and develop medium-to-high fidelity software models of real-world threat weapon systems that accurately capture the capabilities and limitations of both emerging and fielded systems. Security Clearance Requirement: An active Secret security clearance is required to apply, however, the selected candidate must be able to obtain a Top Secret SCI clearance prior to the start date.

Senior M&S Software Developer

Pay Range : There are a host of factors that can influence final salary including, but not limited to, geographic location, Federal Government contract labor categories and contract wage rates, relevant prior work experience, specific skills and competencies, education, and certifications. As a valued team member, you’ll be part of a high-performing group dedicated to our customer’s missions and driven by a higher purpose – to ensure the safety of our nation.

CACI provides information solutions and services in support of national security missions and government transformation for Intelligence, Defense, and Federal Civilian customers. A member of the Fortune 1000 Largest Companies, the Russell 2000 Index, and the S&amp;P SmallCap 600 Index, CACI provides dynamic careers for over 15,800 employees working in over 120 offices worldwide. Visit <a href="http://www.caci.com" target="_blank" itemprop="url" mns_rt="Company">www.caci.com</a>. 
 
 We strive to sustain a corporate culture based on integrity - one that's focused on treating customers ethically and making their priorities our priorities. We pride ourselves in finding and hiring people with the highest intellectual capital, and providing them with challenging opportunities and encouraging their innovation and initiative.

CACI

.NET/D365 Software Developer

These markets include aerospace and defense, factory automation, air and water quality environmental monitoring, electronics design and development, oceanographic research, deepwater oil and gas exploration and production, medical imaging and pharmaceutical research.​. Actual compensation for successful candidates is carefully determined based on several factors including, but not limited to, location, local regulations (such as minimum wage), education/training, work experience, key skills, and type of position.

Teledyne Technologies

Application Software Developer/Analyst

TCH has provided critical services to the banking industry since 1853, and today, our core products facilitate services including Direct Deposit of payroll, bill payments, and check image exchange. The ideal candidate will be a hands-on quality engineer who has strong automation experience, understands distributed application architectures, and an avid interest in testing critical systems where performance, security, resiliency, and sustainability are vital for success.

The Clearing House

Senior Software Developer Engineer in Testing

Leidos is seeking a Jr level, AI Software Developer to join the Airports, Borders, and Security (AB&S) Business Area within the Homeland Sector, building the Travel & Customs Orchestration Platform - a hybrid-cloud, AI-driven system that senses data across the traveler journey (ATC data, manifests, border processing, detection/security, kiosks, e-Gates, staffing, and capacity), predicts demand, orchestrates resources, and measures outcomes. This role focuses on building and modernizing real-time, mission-critical systems that directly support border and aviation security operations - including dynamic staffing allocation, checkpoint and lane management, passenger routing, exception management, passenger communications, cross-functional alerting, performance reporting, and predictive maintenance - while applying AI tools to accelerate development, improve quality, and enhance system reliability.

SAIC is a premier Fortune 500® technology integrator driving our nation's digital transformation. Our robust portfolio of offerings across the defense, space, civilian, and intelligence markets includes secure high-end solutions in engineering, IT modernization, and mission solutions. Using our expertise and understanding of existing and emerging technologies, we integrate the best components from our own portfolio and our partner ecosystem to deliver innovative, effective, and efficient solutions that are critical to achieving our customers' missions.

We are a team of 26,000 strong driven by mission, united purpose, and inspired by opportunity. Headquartered in Reston, Virginia, SAIC has annual revenues of approximately $7.1 billion. For more information, visit saic.com.

Leidos Holdings Inc

AI Native Software Developer

Revionics' leading retail pricing solutions leverage powerful artificial intelligence technologies, including predictive AI, conversational AI, generative AI and agentic AI, to optimize the retail pricing lifecycle and deliver real business value to our clients. Over 33,000 retail locations and $200+B in annual revenue across grocery, drug, convenience, general merchandise, discount, sporting goods stores, fashion, and eCommerce sites optimize with Revionics' solutions.

Revionics, Inc.

Sr. Software Developer

However, employees who have access to the compensation information of other employees or applicants as a part of their essential job functions cannot disclose the pay of other employees or applicants to individuals who do not otherwise have access to compensation information, unless the disclosure is (a) in response to a formal complaint or charge, (b) in furtherance of an investigation, proceeding, hearing, or action, including an investigation conducted by the employer, or (c) consistent with the contractor’s legal duty to furnish information. Experience working with both relational databases such as PostgreSQL, MySQL, and NoSQL databases like Firestore, MongoDB, ensuring effective database design, optimization, and scalability.

BLEN

Senior Software Developer II - Full Stack

The ideal candidate excels at cross-functional collaboration, stakeholder communication, and the entire software development lifecycle—ensuring robust and scalable solutions that meet plant and business needs. NET Developer with a strong background in manufacturing environments and MES (Manufacturing Execution Systems) to design, develop, and maintain our internally developed plant production and business systems.

Astemo Indiana

Senior Software Developer / IT Engineer

We're looking for thoughtful, skilled professionals who thrive as trusted partners building technology-agnostic solutions and want to apply their talents supporting customers with difficult and important mission sets. Actual compensation will be determined based on a variety of factors, including relevant experience, education, certifications, skills, security clearance level, geographic location, market conditions, and internal equity.

Red Horse Corporation Ltd.

Mid-Level Software Developer

Work closely with engineering teams to gather feedback, evangelize best practices, and make the "paved road" a reality - empowering every Harvey engineer to move fast with confidence. The Developer Experience team is what keeps Harvey's fast growth momentum possible - the kind of fast where every week brings new products, new capabilities, and new challenges.

Harvey, Inc.

Staff Software Engineer, Developer Experience

ADAPTED_NOW

Formerly Qualitest, QualityAI supports global enterprises across regulated and technology-driven industries, combining deep engineering heritage with AI-enabled delivery, operational assurance, and lifecycle expertise to help clients achieve certainty at go-live. Never stop experimenting and learning with QualityAI Tech academy: 3000+ training courses, mentorship programs, technical tribes, sponsored certifications, leadership programs and much more.

Systems Software Developer Jobs in the United States

Senior Software Developer – IBM i / RPG ZipStaff Inc.

Senior Software Developer La Jolla Logic, Inc

Navy Training Baseline Developer (Engineer Software 3) 30175 Huntington Ingalls Industries Inc

Junior Software Developer ASR International Corp

Software Developer, Senior Abile Group, Inc.

Senior Software Developer (Data Fabric/ Data Fusion) Parsons

Senior Software Developer (Metric/Telemetry Parsons

Expert M&S Software Developer Parsons Commercial Technology Group Inc.

Staff Software Engineer, Developer Automation D-Matrix

Senior M&S Software Developer Parsons Commercial Technology Group Inc.

.NET/D365 Software Developer CACI

Application Software Developer/Analyst Teledyne Technologies

Senior Software Developer Engineer in Testing The Clearing House

AI Native Software Developer Leidos Holdings Inc

Sr. Software Developer Revionics, Inc.

Senior Software Developer II - Full Stack BLEN

Senior Software Developer / IT Engineer Astemo Indiana

Mid-Level Software Developer Red Horse Corporation Ltd.

Staff Software Engineer, Developer Experience Harvey, Inc.

UiPath RPA Developer Qualitest

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