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93 software engineer iii jobs at 48 companies in Frederick, MD

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Founding Full-stack / Product Engineer
Cupertino, CA, US
$130k-$300k/yr On-SiteFull Time
HiringCafe
HiringCafe: Building a 100× better job search engine to take on Indeed and LinkedIn.
Help us build a 100× better job search engine. We need a full-stack engineer with great taste, sharp fundamentals, and a track record of shipping polished product on React/Next.js plus a real backend (Firebase, Elasticsearch, Redis, Stripe).
React, Next.js, TypeScript, Firebase, Elasticsearch, Redis, Stripe
Help us #BeatIndeed & #BeatLinkedIn
1mo
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Software Engineer III
Tysons Corner, Virginia, United States
OnsiteFull Time
Integral Federal
Integral Federal: Provides IT, cybersecurity, and digital transformation solutions for government agencies.
7+ YOEBachelor's in engineering; 7+ years software engineering; biometric systems and secure data handling experience; knowledge of encryption and information assurance; Secret security clearance.
Android, Biometrics, Encryption, DevOps, DevSecOps
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2mo
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Software Engineer III
Annapolis Junction, Maryland, United States
HybridFull Time
Quevera: Software engineering and cloud solutions for government and defense.
20+ YOEBackend software engineer level 3 with 20+ years web/app dev or 24 years without a degree; JS/React/Angular/Vue; Java/C++/VB.NET; HTML/CSS/Python/Perl/Ruby; REST APIs; SDLC; leadership; TS/SCI Poly clearance; Linux scripting; Git/Maven; Jira/Confluence.
React, Angular, Vue, Java, C++, VB.NET, HTML, CSS, Python, Perl, Ruby, REST, Tomcat, NodeJS, Linux scripting, Git, Maven, Jira, Confluence
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2mo
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Software Engineer III
Reston or Somerville
$110k-$135k/yr HybridFull Time
Babel Street
Babel Street: AI-powered identity intelligence and risk operations software solutions.
5+ YOESenior Python engineer for large-scale web scraping with anti-bot evasion, data extraction, and SQL data management.
Python, Scrapy, Playwright, Selenium, Puppeteer, SQL, PostgreSQL, MySQL, Cloudflare, Akamai, PerimeterX
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1w
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Software Engineer III
Lone Tree or Sparks or Longmont or Hagerstown or Herndon or Englewood
$108k-$149k/yr HybridFull Time
Sierra Nevada Corporation
Sierra Nevada Corporation: Develops mission-critical aerospace and national security technology systems.
6+ YOEBachelor's degree in CS/Software Engineering or related,6+ years software development experience,proficiency in C++,Java,Python,experience with RTOS/embedded systems preferred,excellent communication and critical thinking.
C++, Java, Python, C, C#, HTML, Bash
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2mo
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Software Engineer III, Artificial Intelligence
Rockville, Maryland, United States
$122k-$180k/yr OnsiteFull Time
X-energy
X-energy: Develops advanced small modular nuclear reactors and fuel technology.
5+ YOEDevelop AI solutions in a tiger team; front-end, agentic AI, data integration, ML-Ops, or product management; collaborate across engineering and business teams.
React, TypeScript, Tailwind CSS, Vite, AWS, Git, GitLab, CI/CD, Jira, Confluence, LangChain, LangGraph, AWS Bedrock, AWS Strands, AWS Glue, Aurora, DynamoDB, S3, WebSockets, REST APIs, Bun
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3mo
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Software Engineer III
Bethesda or Waltham
$112k-$176k/yr HybridFull Time
ZoomInfo
ZoomInfoNASDAQ: GTM: Provides B2B contact data and sales intelligence software.
5+ YOE5+ years in software engineering; strong background in big data pipelines, Hadoop/Spark, JVM (Java/Scala); distributed systems; NLP experience a plus.
Hadoop, Spark, Java, Scala, NLP, JVM
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Software Engineer III
Fort Meade, Maryland, United States
$190k-$205k/yr OnsiteFull Time
ALEX - Alternative Experts
ALEX - Alternative Experts: Provides engineering, data analytics, and logistics services to government.
8+ YOE8+ years cloud-native software engineering with Go/Python, Kubernetes and GitOps expertise; experience with Terraform/Ansible, event-driven systems (Kafka); mentorship and architecture leadership; TS/SCI with FSP required.
Go, Python, Kubernetes, Helm, GitOps, Kafka, Terraform, Ansible, ArgoCD, Fleet, TypeScript, OpenShift, Rancher, Istio, Linkerd, Prometheus, Grafana, OpenTelemetry, AWS GovCloud, cloud-init, Git, DISA STIGs
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1mo
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Software Engineer III
Annapolis Junction, Maryland, United States
$215k-$291k/yr OnsiteFull Time
General Dynamics Information Technology
General Dynamics Information TechnologyNYSE: GD: Provides mission-critical IT services to government and defense organizations.
10+ YOETop Secret/SCI with polygraph required; US citizenship required; 10+ years related software engineering experience; Bachelor’s in Computer Science (or 4 years additional SWE experience); skills in computer/system security and HTML, CSS, JavaScript.
HTML, CSS, JavaScript, ITOM, ITSM, HRSD, CSM, Service Portal, Free and Open Source Software (FOSS), GOTS, COTS
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2w
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Software Engineer III
Hanover, Maryland, United States
$119k-$178k/yr OnsiteFull Time
Oceaneering
OceaneeringNYSE: OII: Global provider of engineered services for offshore energy industries.
5+ YOEBS in CS/CE/Math/EE (or equivalent), 5+ years software engineering, experience with REACT/C/C++/C#, Linux, Jira, Git; ability to obtain DoD security clearance; US citizenship; strong written/oral communication and hardware test proficiency.
REACT, C, C++, C#, Linux OS, Jira, Git, oscilloscopes, multimeters
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1mo
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Software Engineer III
Washington, District of Columbia, United States
$140k-$192k/yr OnsiteFull Time
Vantage Systems
Vantage Systems: Providing engineering and technical services for space and aviation missions.
5+ YOESECRET security clearance; mid to senior-level software development experience; multiple degree paths with substantial work experience.
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2mo
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Software Engineer III
Hunt Valley, Maryland, United States
$111k-$168k/yr OnsiteFull Time
Textron
TextronNYSE: TXT: Manufactures aircraft, defense systems, and industrial specialized vehicles.
5+ YOE5+ yrs experience with BS or 2+ yrs with MS in CS/CE; robotics/autonomy experience; strong software integration skills.
Git, Mercurial, Unix, C, C++, Qt, OpenDDS, MOOS, IvP, Docker, Jenkins, Jira, MagicDraw, UML, MBSE
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2w
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Software Engineer III
Arlington, Virginia, United States
$165k-$190k/yr RemoteFull Time
GrammaTech
GrammaTech: A software delivering enterprise-scale solutions and cloud modernization services.
Technical leadership in cloud-native AWS applications, Java full-stack development, microservices and REST API design, CI/CD/DevSecOps, and mentoring engineering teams.
AWS, AWS Lambda, Amazon S3, Amazon SQS, Amazon SNS, Amazon CloudWatch, Amazon DynamoDB, Java, Oracle, PostgreSQL, Git, Jira, Confluence
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3mo
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Senior Software Engineer III (Government)
Columbia, Maryland, United States
$89k-$208k/yr OnsiteFull Time
AT&T
AT&TNYSE: T: Provides wireless and fiber optic telecommunication services.
8+ YOEBachelor's degree; 8 years experience; .NET, Java, Python, C# skills; TS/SCI clearance.
.NET, ASP.NET, C#, Java, Python, Oracle
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3mo
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Software Engineer III (TS/SCI w/ Polygraph) - 4 Openings
Annapolis Junction, Maryland, United States
OnsiteFull Time
COMSO
COMSO: Provides IT and software solutions to federal government agencies.
12+ YOEStrong Enterprise Java development with Spring Boot; 12+ years SWE experience; BS in CS or related field; 4 years of additional SWE experience can substitute for degree; 7 years in software DB/repository development; TS/SCI with polygraph clearance required.
Java, Spring Boot
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1mo
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Software Engineer III
Annapolis Junction, Maryland, United States
$215k-$291k/yr OnsiteFull Time
GDIT
GDITNYSE: GD: Delivers IT and mission services to government agencies.
10+ YOETop Secret/SCI clearance with polygraph required, US citizenship required, 10+ years related experience, Bachelor’s in Computer Science (or 4 yrs additional SWE experience), skills in computer/information/system security and web languages; leadership experience preferred.
ITOM, ITSM, HRSD, CSM, Service Portal, HTML, CSS, JavaScript, Free and Open Source Software (FOSS), Government-off-the-shelf (GOTS), Commercial-off-the-shelf (COTS)
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1mo
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(USA) Software Engineer III, Information Security
Herndon or Bentonville
$90k-$216k/yr OnsiteFull Time
Walmart
WalmartNYSE: WMT: Multinational retail operating discount stores and supermarkets.
3+ YOE3–5 years software engineering experience; expertise in certificate lifecycle management, PKI, TLS; proficiency in Java, Python, or Go; familiarity with observability, cloud (GCP/Azure), and infrastructure-focused engineering.
Java, Python, Go, GCP, Azure, Subversion, Git, Librarian, Oracle, DB2, Microsoft SQL Server, SQL, SAP, Microsoft PowerShell, Cobol, Rexx, .NET
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3mo
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Cloud Software Engineer 3 - III
Fort Meade, Maryland, United States
OnsiteFull Time
InterImage
InterImage: Provides IT modernization and cybersecurity services to federal government agencies.
12+ YOETwelve years of software engineering experience; BS in Computer Science or related field; cloud and big-data, MapReduce, and distributed computing experience; relevant certifications.
Java, Spring Boot, MongoDB, Kubernetes, Rancher RKE2, Kalka, AWS, RHEL, LLMs, S3/Minio, Elasticsearch, Nifi
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2mo
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Civil Engineer III
Washington, District of Columbia, United States
$95k-$110k/yr HybridFull Time
Bowman Consulting Group
Bowman Consulting GroupNASDAQ: BWMN: Provider of engineering and infrastructure consulting services.
5+ YOEBachelor's in Civil Engineering; PE license preferred; 5+ years land development experience; strong design software knowledge.
Civil3D, AutoCAD, HEC-RAS, StormCAD, PCSWMM, HEC-HMS, WSPG W, CIVILD, AES, CLOMR/LOMR, Microsoft Office Suite
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1mo
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Computer Engineer III
Washington, District of Columbia, United States
OnsiteFull Time
Engineering Services Network
Engineering Services Network: Provides engineering and IT services for defense and government.
10+ YOEBachelor's in CS/Cybersecurity/Network Security/IT/EE/Math; 10+ yrs in computer design, software or security; Navy program experience; cybersecurity engineering background.
RMF, NIST, DoD 8500 series, DoD 8570 requirements, NAVSEA Enclave policy
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1w
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Senior Software Development Engineer III
Washington, District of Columbia, United States
OnsiteFull Time
Advanced Resource Technologies
Advanced Resource Technologies: Provides information security and technical services to federal agencies.
7+ YOE7+ years software engineering experience; BS in CS or related (MS preferred); expertise with Python, Azure cloud services, CI/CD, IaC, containers, distributed systems, LLM-based AI apps; public trust eligibility required.
Python, Microsoft Azure, Azure Functions, Azure API Management, Azure Container Apps, Azure OpenAI Service, Terraform, Bicep, Docker, Kubernetes, Model Context Protocol (MCP), Microsoft Entra ID
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