Full Stack Software Engineer, Level II
Read straight from Seneca Holdings's careers page, verified 7h ago.Seekless can tailor your résumé to it.
Seekless can write your résumé for this posting first.
Before you apply
SalaryNo pay range posted
LocationRemote
Also inAberdeen Proving Ground, Maryland
Work modehybrid
Typefull-time
SeniorityMid
Experience4–8 yrs
DepartmentClear Creek Federal
Company size1,001–5,000 people
PostedSep 1, 2026 · 2mo ago
Verified live7h ago
At a glanceSummarised by Seekless from the posting.
Bachelor's degree in engineering, computer science, or a related technical discipline
4 to 8 years of relevant professional experience in software engineering
Active DoD Secret clearance at time of application
IA baseline certification (8570 IAT II equivalent) where the engineer holds privileged access to the DEVNET or the classified lab
C#, or Python development
Agile/Scrum delivery
GitLab CI/CD pipelines
REST API design
Unit and integration testing
STIG-compliant secure coding
Windows Army Gold Master (AGM) target environment
Software installation package assembly
System User's Manual authoring
TCP/IP instrument integration
SDR and Keysight UXG control interfaces
Code review and mentoring
Front-end development in a modern JavaScript framework (Angular)
HTML5/CSS3 and responsive browser-based UI construction
Data visualization for RF and scenario data
Section 508 / WCAG 2.1 AA conformance
Usability testing
Active DoD clearance at level of Secret or above
CompTIA Security+ CE
Certified Scrum Developer
AWS Certified Developer - Associate
IAAP CPACC or DHS Trusted Tester (front-end scope)
Experience building instrument control interfaces over TCP/IP, particularly Keysight or National Instruments hardware
Front-end delivery experience in Angular against a Section 508 or WCAG 2.1 AA standard
Experience with electronic warfare, software defined radios, electromagnetic spectrum
Experience with data warehousing, data pipelines and data science
Ability to work on-site at Aberdeen Proving Ground, Maryland on a hybrid schedule
Signed non-disclosure agreement before start of performance
Common Access Card issuance
DoD and Army universal training set completion at start of performance and on Army cycle
Skills
C#
.Net
Python
Angular
SQL Server
PostgreSQL
TCP/IP
GitLab
HTML5
CSS3
REST API
Benefits
Health insurance
Dental insurance
Vision insurance
Life insurance
Disability insurance
Health savings account
Flexible spending account
401(k)
About the company
Clear Creek Federal is part of the Seneca Nation Group (SNG) portfolio of companies. SNG is Seneca Holdings’ federal government contracting business that meets mission-critical needs of federal civilian, defense, and intelligence community customers. Our portfolio comprises multiple subsidiaries that participate in the Small Business Administration 8(a) program. To learn more about SNG, visit the website and follow us on LinkedIn.
Benefits
Our team of talented individuals is what makes us successful. To support our team, we provide a balanced mix of benefits and programs. Your total rewards package includes competitive pay, benefits, and perks, flexible work-life balance, professional development opportunities, and performance and recognition programs. We offer a comprehensive benefits package that includes medical, dental, vision, life, and disability, voluntary benefit programs (critical illness, hospital, and accident), health savings and flexible spending accounts, and retirement 401K plan. One of our fundamental principles is to offer competitive health and welfare benefits to our team members, providing coverage and care for you and your family. Full-time employees working at least 30 hours a week on a regular basis are eligible to participate in our benefits and paid leave programs. We pride ourselves on our collaborative work environment and culture, which embraces our mission of providing financial and non-financial benefits back to the members of the Seneca Nation.
About the Program
About the role
The U.S. Army Communications-Electronics Command (CECOM) Software Engineering Center, Intelligence Electromagnetic Warfare and Sensors (IEW&S) Directorate, operates the Army Reprogramming Analysis Team (ARAT) at Aberdeen Proving Ground. ARAT builds, tests, and distributes mission software for fielded electromagnetic warfare systems, including the AN/APR-39 radar warning receiver family, the AN/APR-48A/B Modernized Radar Frequency Interferometer, the Aircraft Gateway Processor on the AH-64, and the AN/VLQ-12 CREW Duke. ARAT targets its mission software products to 14 geographic areas of responsibility across six combatant commands.
The ARAT Innovation Initiatives effort modernizes that infrastructure: browser-based threat modeling in the Signal Modeling Framework, automated RF hardware-in-the-loop testing through the Unified Test Automation Suite and software-defined radios, an automated Air/Terrestrial Testbed, test data warehousing, automated mission data product generation, and the ASPEN software distribution portal across NIPR, SIPR, and JWICS. Work is executed in Agile sprints with DevSecOps practices in a Government-approved GitLab environment.
Position Summary
The Level II Software Engineer independently designs and delivers software features across the client’s existing products. The role owns end-to-end delivery of assigned GitLab milestones, integrating TCP/IP communication among SDRs, Keysight UXGs, UTAS server/client, M&S server/client, and CATS/UMCATS rack components into the TestNet enterprise. It provides technical support for integrated system evaluation, interface upgrades, sustainment, and issue resolution. The software engineering is defined full stack (C#, .Net, Python, Angular, SQL Server, Postgres) and the role also builds Section 508 compliant browser-based user interfaces required such as a threat-simulation builder, a test setup and analysis interface, and the software delivery portal.
Responsibilities include, but are not limited to:
•
Independently design and deliver software features across the client’s products under owning assigned GitLab milestones end to end.
•
Integrate TCP/IP communication among software-defined radios, Keysight UXGs, UTAS server and client, modeling and simulation server and client, and CATS and UMCATS rack components into the TestNet enterprise.
•
Build the browser-based user interfaces required by covering the threat-simulation builder, the test setup and analysis interface, and the software delivery portal, and deliver them Section 508 conformant.
•
Provide technical support for integrated system evaluation, interface upgrades, sustainment, and issue resolution.
•
Travel to Aberdeen Proving Ground at the end of a project to install, configure and test software in the client’s laboratory to gain client acceptance of deliverables.
•
Track hours across multiple projects (5-12 annually) to ensure accurate cost accounting for monthly reports.
•
Assist Project Manager and client with accurate and reasonable estimates on level of effort for planned software projects.
•
Architect solutions using as much open source software as possible to increase the client’s mission capabilities and the team’s DevSecOps and software delivery capabilities.
•
Build data pipelines and warehouses on very large datasets that support analytic visualizations and key mission metrics.
•
Build an anchored and factual chat assistant using open source LLMs and design for on-premise model hosting and inference.
•
Build software that creates, processes and deploys threat signals defined in SMF and transform those definitions into vendor specific file types for testing across hardware devices.
Required Qualifications
•
Bachelor’s degree in engineering, computer science, or a related technical discipline.
•
4 to 8 years of relevant professional experience in software engineering.
•
Active DoD Secret clearance at time of application.
•
Position-specific training beyond the common set: IA baseline certification (8570 IAT II equivalent) where the engineer holds privileged access to the DEVNET or the classified lab.
•
Ability to work on-site at Aberdeen Proving Ground, Maryland on a hybrid schedule, with on-site presence required for classified and laboratory work.
Preferred Qualifications
•
CompTIA Security+ CE.
•
Certified Scrum Developer.
•
AWS Certified Developer - Associate.
•
IAAP CPACC or DHS Trusted Tester (front-end scope).
•
Experience building instrument control interfaces over TCP/IP, particularly Keysight or National Instruments hardware.
•
Front-end delivery experience in Angular against a Section 508 or WCAG 2.1 AA standard.
•
Experience with electronic warfare, software defined radios, electromagnetic spectrum.
•
Experience with data warehousing, data pipelines and data science.
Technical Skills and Tools
C#, or Python development; Agile/Scrum delivery; GitLab CI/CD pipelines; REST API design; unit and integration testing; STIG-compliant secure coding; Windows Army Gold Master (AGM) target environment; software installation package assembly (source, executables, Build Version Description, Help); System User’s Manual authoring; TCP/IP instrument integration; SDR and Keysight UXG control interfaces; code review and mentoring; front-end development in a modern JavaScript framework (Angular); HTML5/CSS3 and responsive browser-based UI construction; data visualization for RF and scenario data; Section 508 / WCAG 2.1 AA conformance; usability testing.
Security and Training Requirements
•
An active DoD clearance at the level shown above is required. Secret is the floor across this contract.
•
A signed non-disclosure agreement is required before start of performance.
•
Common Access Card issuance runs approximately 24 hours; full network and facility access typically takes three to four business days after in-processing.
•
Every position carries the universal DoD and Army training set, completed at start of performance and refreshed on the Army cycle: DoD Cyber Awareness Challenge, Threat Awareness and Reporting Program (TARP), annual security refresher, insider threat awareness, controlled unclassified information handling, Antiterrorism Level I, iWATCH briefing, ATCTS registration, and installation access processing.
Equal Opportunity Statement:
Seneca Holdings provides equal employment opportunities to all employees and applicants without regard to race, color, religion, sex/gender, sexual orientation, national origin, age, disability, marital status, genetic information and/or predisposing genetic characteristics, victim of domestic violence status, veteran status, or other protected class status. This policy applies to all terms and conditions of employment, including, but not limited to, hiring, placement, promotion, termination, layoff, recall, transfer, leave of absence, compensation and training. The Company also prohibits retaliation against any employee who exercises his or her rights under applicable anti-discrimination laws. Notwithstanding the foregoing, the Company does give hiring preference to Seneca or Native individuals. Veterans with expertise in these areas are highly encouraged to apply.