Fredericksburg • 50 milesRemote · Hybrid · Onsite · Field · All Environments
Fredericksburg • 50 milesRemote · Hybrid · Onsite · Field · All Environments
Fredericksburg • 50 milesRemote · Hybrid · Onsite · Field · All Environments
Fredericksburg • 50 milesRemote · Hybrid · Onsite · Field · All Environments
2mo
Save
Mark Applied
Hide
Senior Backend Engineer (Ruby on Rails/Python) - Content Foundations
San Francisco or Atlanta or Austin or Boston or Chicago or Dallas or Denver or Houston or Jacksonville or Los Angeles or Miami or New York City or Phoenix or Portland or Sacramento or Salt Lake City or San Diego or Seattle or Washington, D.C. or Ottawa or Toronto or Vancouver or Mexico City
$120k-$217k/yr HybridFull Time
7+ YOE7+ years software engineering; experience with ingestion pipelines, ETL, and content processing; proficient in Ruby, Python, or Go; AWS and distributed workflows; strong DB design; effective communicator.
Ruby, Python, Go, AWS, SQL, NoSQL, ETL, LLM
2mo
Save
Mark Applied
Hide
Cloud Software Engineer - TS/SCI w/ Poly
Herndon, Virginia, United States
$159k-$215k/yr OnsiteFull Time
10+ YOE10+ years in cloud-native software engineering; AWS; IaC; DevOps; Python/Java/C++/Ruby; TS/SCI with Poly; US citizenship.
AWS, CloudFormation, S3, RDS, EC2, ECS, Lambda, SQS, SNS, IaC, GitHub, Jenkins, Docker, Ansible, Python, Java, C++, Ruby
2mo
Save
Mark Applied
Hide
Red Hat Linux Administrator
Arlington, Virginia, United States
OnsiteFull Time
3+ YOE3-5 years Red Hat Linux admin; strong RH; automation with Ansible/Puppet; scripting with Bash, Python, Ruby; PowerShell; team collaboration.
Red Hat Linux, Ansible, Puppet, Bash, Python, Ruby, PowerShell
2mo
Save
Mark Applied
Hide
Staff Software Development Engineer - Tools Team
McLean, Virginia, United States
$183k-$215k/yr OnsiteFull Time
10+ YOE10+ years full-stack engineering; 1+ year LLM integration; 5+ years Ruby on Rails, Go, React/TypeScript; Bachelor's in CS or related field
Ruby on Rails, Go, React, TypeScript, PostgreSQL, Model Context Protocol, Claude, OpenAI, Google Vertex AI
3w
Save
Mark Applied
Hide
Associate Delivery Consultant – AIML, Professional Services A2C Delivery
Arlington or Herndon
$98k-$160k/yr OnsiteFull Time
Bachelor's in CS/Engineering or equivalent, cloud architecture experience, proficiency in Java/Python/Ruby/Node.js/C#/C, AWS experience preferred; must be US citizen.
Java, Python, Ruby, Node.js, C#, C, AWS, Hadoop, Spark, Kafka, Kinesis
1w
Save
Mark Applied
Hide
Front-End JavaScript Web Developer
Chantilly, Virginia, United States
$55k-$126k/yr OnsiteFull Time
5+ YOE5+ years software development experience, 2+ years JavaScript, TS/SCI with polygraph required, Bachelor's degree, EMR not required; experience with React and Ruby on Rails desirable.
JavaScript, React, Ruby on Rails
1w
Save
Mark Applied
Hide
Front-End JavaScript Web Developer
Chantilly, Virginia, United States
$55k-$126k/yr OnsiteFull Time
5+ YOE5+ years software development, 2+ years JavaScript, active TS/SCI clearance with polygraph required, bachelor\u0002s degree, EMR not mentioned, React and Ruby on Rails desirable.
JavaScript, React, Ruby on Rails
2w
Save
Mark Applied
Hide
Information Technology Specialist (Application Software)
Washington, District of Columbia, United States
OnsiteFull Time
1+ YOEDesign, develop, test, deploy, and maintain Ruby on Rails applications; work with RabbitMQ/AMQP, MongoDB, AWS EKS, APIs, TDD/BDD, accessibility standards; provide technical mentorship.
RabbitMQ, AMQP, MongoDB, AWS Elastic Kubernetes Service (EKS), Ruby on Rails, RESTful, SOAP/XML, RSpec, Cucumber, HTML5, CSS3, JavaScript (ES6+), dry-validation, dry-monads, dry-struct, dry-types, GitHub Actions, Git, Jira
2mo
Save
Mark Applied
Hide
Data Scientist Lead
McLean, Virginia, United States
$176k-$282k/yr OnsiteFull Time
12+ YOE2+ MgmtActive TS/SCI with poly; BS/BA, 12+ years experience; strong data science with Python, R, Ruby; cross-organizational collaboration; strong project management and communication skills.
Python, R, Ruby
1mo
Save
Mark Applied
Hide
Site Reliability Engineer
United States or Washington
$130k-$160k/yr RemoteFull Time
5+ YOEBachelor's in computer science or similar, 5+ years SRE or similar, programming in Golang/Ruby/Python, Kubernetes, cloud experience (Azure/AWS/GCP), observability tools, and incident management expertise.
Microsoft Azure Cloud Services, GitHub Actions, GitLab CI, Golang, Ruby, Python, Kubernetes, AWS, GCP, Datadog, OpsGenie, PagerDuty
1w
Save
Mark Applied
Hide
Linux Administrator - Secret Clearance Required
Falls Church, Virginia, United States
$128k-$173k/yr HybridFull Time
8+ YOE8+ years administering RHEL7/8 Linux servers, experience with Ansible/Puppet/Chef, scripting (Bash, Ruby, Python, Perl), PowerShell, STIGs and security practices; active Secret clearance required.
Linux, Red Hat Enterprise Linux (RHEL), Ansible, Puppet, Chef, Bash, Ruby, Python, Perl, PowerShell, STIG Manager, NFS, CIFS, SMB
1mo
Save
Mark Applied
Hide
Data Scientist Lead - TS + CI Poly required to apply - No Virginia
Tysons, Virginia, United States
$195k-$205k/yr OnsiteFull Time
12+ YOEActive TS/SCI with polygraph, 12+ years relevant experience with BS/BA, proficiency in Python, R, Ruby, strong organizational and customer engagement skills, experience supporting the Intelligence Community preferred.
Python, R, Ruby
2w
Save
Mark Applied
Hide
Senior DevOps Automation Engineer
Arlington or United States
$120k-$173k/yr HybridFull Time
3+ YOE3+ years DevOps/automation/cloud experience; proficient in Python/Ruby/Go/Node.js/C#; CI/CD, config management, containerization, AWS/Azure experience; strong communication and critical thinking.
Python, Ruby, Go, Node.js, C#, GitLab, Jenkins, Bamboo, CircleCI, TravisCI, Bash, PowerShell, Ansible, Chef, Puppet, Packer, AWS, Azure, Docker, Kubernetes, Docker Swarm, Elastic Container Service
1d
Save
Mark Applied
Hide
Sr Software Developer
Chantilly, Virginia, United States
OnsiteFull Time
Must be fully cleared with recent polygraph; experience with ServiceNow, JavaScript/Angular/.NET/Ruby on Rails, Oracle SQL, IBM Cognos/SPSS, cloud administration, DevSecOps, and Section 508/WCAG compliance.
ServiceNow, ServiceNow Service Portal, Update Sets, JavaScript, jQuery, AJAX, HTML, CSS, Angular, Ruby on Rails, .NET MVC, IBM Cognos, IBM SPSS Statistics, Oracle SQL, XML, Linux, Windows, Tableau, Microsoft Power BI
5d
Save
Mark Applied
Hide
Automation Tester- Remote
Reston or United States
$67k-$115k/yr RemoteFull Time
3+ YOE3+ years testing experience, bachelor's degree, 2+ years with Appian/low-code automation, FitNesse/Ruby/JRuby, CI/CD, Jira/Xray, Git, and ability to obtain Public Trust.
Appian, FitNesse, Ruby, JRuby, Jenkins, Docker, Kubernetes, AWS, Jira, Xray, Git, GitHub, SQL, API
2mo
Save
Mark Applied
Hide
Data Scientist Lead
McLean, Virginia, United States
$176k-$282k/yr OnsiteFull Time
12+ YOEActive TS/SCI with polygraph; 12+ years of relevant experience; strong data science background with Python, R, Ruby; customer service and project management skills; cross-organizational collaboration; excellent organization.
Python, R, Ruby
1mo
Save
Mark Applied
Hide
Sr. Software Engineer - Owner/Investor
Santa Barbara or Dallas or San Diego or San Francisco or Denver or Atlanta or Chicago or Washington
$138k-$173k/yr HybridFull Time
5+ YOE5+ years building and scaling web applications; full‑stack experience with Ruby on Rails, React, MySQL, AWS, SOA; strong TDD and Agile (Scrum/Kanban) experience; BS/MS in CS preferred.
Ruby on Rails, React, MySQL, AWS, SOA, Test-Driven-Development, Agile, Scrum, Kanban
1mo
Save
Mark Applied
Hide
Los Angeles Based Graduate Intern - Building Energy Modeling and Analysis
Los Angeles or Golden or Boulder or Washington or United States
$45k-$71k/yr HybridFull Time, Internship
Graduate-student or recent-graduate internship requiring building energy modeling and simulation experience, proficiency with EnergyPlus/OpenStudio/Modelica, programming (Python, MATLAB, Ruby), GitHub, GPA ≥ 3.0, and residence in California for the internship.
EnergyPlus, OpenStudio, Modelica, Python, MATLAB, Ruby, GitHub
1mo
Save
Mark Applied
Hide
Senior Software Engineer
United States or California or Colorado or Hawaii or Illinois or Maryland or Minnesota or New Jersey or New York or New York City or Vermont or Washington or Washington
$150k-$180k/yr RemoteFull Time
5+ YOE5+ years software development experience; deep expertise in software architecture, system design, scalability, cloud-native design, security; proficiency with Ruby on Rails, React, AWS, and PostgreSQL; strong communication and mentoring skills.
Ruby on Rails, React, AWS, PostgreSQL
4d
Save
Mark Applied
Hide
VoIP Systems Engineer
McLean, Virginia, United States
$166k-$295k/yr OnsiteFull Time
9+ YOETS/SCI with Poly required. 9+ years relevant experience (varies by degree). Expertise in VoIP/analog/ISDN telephony, Linux server management (Ubuntu, CentOS), BESS tools, Ruby on Rails, PowerBuilder, and Korn shell.
BESS Billing and Provisioning Tools, Linux, Ubuntu, CentOS, PowerBuilder, Korn shell, Ruby on Rails