Constellis
Posted 1mo ago

Full Stack Developer

Constellis
Florida or Herndon or Texas or Virtual
RemoteFull Time
Responsibilities
  • developing backend
  • building frontend
  • integrating devices
Requirements
  • Experience building full-stack systems with Python/FastAPI
  • JavaScript/TypeScript and React
  • REST APIs
  • PostgreSQL
  • Docker, Git
  • Bachelor\u0002s degree in a technical field required
Technical tools mentioned
FastAPIKafkaPostgreSQLDockerReactTypeScriptWebSocketsMapboxREST APIsMongoDBOpenSearch/ElasticjsTailwind CSSshadcn/uiOAuthJWTKeycloakAuth0GitGitHubJiraConfluenceGitHub ActionsArgoCDKubernetes

Job description

Full Time/Part Time

Full-time

Regular/Temporary

Regular

Position Summary

We’re looking for a Full Stack Developer to help expand and refine the LEXSO (Layered Extended Security Operations) platform—a modular, microservice-based system designed to orchestrate real-time data from sensors, cameras, AI engines, and automation tools across security operations environments.

As a full stack engineer, you’ll contribute across both frontend and backend domains, building scalable microservices, powerful APIs, and responsive user interfaces. You'll work alongside specialists in automation, sensor fusion, and distributed systems to solve complex challenges in a modern DevOps environment.

This is a great opportunity for someone with a few years of experience who wants to take ownership of major features and help drive architectural and system-level improvements in a fast-moving, impactful platform.

 

RESPONSIBILITES:

  • Design and develop backend services using FastAPI, Kafka, PostgreSQL, and Docker.
  • Build and maintain frontend interfaces using React, TypeScript, and real-time visual components (e.g., WebSockets, Mapbox).
  • Create and maintain REST APIs and Kafka consumers for automation and alerting workflows.
  • Integrate a wide range of devices and sensors (e.g., PTZ cameras, LiDAR, radar, drones) into reusable service modules.
  • Contribute to component design, service orchestration, and data modeling.
  • Participate in sprint planning, peer reviews, and CI/CD deployment workflows.
  • Debug, test, and optimize both backend and frontend features.
  • Collaborate using Git, GitHub, Jira, Confluence, and automated build pipelines.
  • Work is typically based in a remote environment and subject to frequent interruptions. Business work hours are Monday-Friday standard core hours, however some extended or weekend hours may be required.
  • Other duties as assigned.

 

QUALIFICATIONS:

  • Proficiency with Python (preferably FastAPI or similar frameworks)
  • Proficiency with JavaScript/TypeScript and React or another frontend framework
  • Experience designing and consuming REST APIs
  • Familiarity with relational databases (e.g., PostgreSQL) and schema design
  • Experience with Docker, Git-based workflows, and Agile teams
  • Strong problem-solving skills and attention to software quality
  • Preferred:
    • Exposure to:
      • Kafka, MongoDB, or OpenSearch/Elastic
      • js, Tailwind CSS, shadcn/ui
      • OAuth/JWT authentication flows (e.g., via Keycloak, Auth0)
      • Real-time systems: WebSockets, pub/sub architectures
      • IoT, robotics, or physical device integrations
      • CI/CD tooling: GitHub Actions, ArgoCD, Kubernetes
    • Bachelor’s degree in Computer Science, Software Engineering, Electrical Engineering, or a related technical field is required. Candidates with equivalent degrees (e.g., Robotics, Mechatronics, Data Science, Cybersecurity) will also be considered.

 

BENEFITS

Constellis offers a comprehensive, total rewards package that includes competitive compensation and a flexible benefits package that reflects its commitment to creating a diverse and supportive workplace.

Company Info

The modern threat landscape poses complex challenges. In isolation, individual threats can be managed. However, when coordinated, complexity scales dramatically. Modern security requires detection across all threat types simultaneously. No single sensor or security solution can solve this problem.


LEXSO™ transforms the operational friction of sensor saturation into a unified, intelligent security system. As an AI-native, MOSA-compliant architecture, LEXSO™ fuses disparate sensor data directly at the edge. As a result, LEXSO™ detects, classifies and mitigates threats in sub-second timelines, maintaining a resilient operating picture even when the network is compromised.

EEOC Statement

Constellis and its affiliated companies are equal opportunity employers. All applicants receive consideration without regard to race, color, sex, age, ethnicity, religion, national origin, disability, veteran status or any other characteristic prohibited by federal, state, or local law.

About Constellis

Provides private security, tactical training, and risk management services.

Year founded
2010
Employees
12700
Organization type
Private
Latest investment
Raised $1.00B Private Equity (2017) — led by Apollo Global Management
Headquarters
US

Similar jobs

Full Stack Developer roles near Herndon, Virginia
9h
Save
Mark Applied
Hide
Full Stack Engineer
United States or Los Angeles or Washington
RemoteFull Time
Virtualitics
Virtualitics: Private AI software serving defense, government, and enterprise organizations with readiness applications.
Build React frontends and Python backend services across the stack, owning features through production and collaborating with cross-functional teams. Active US Government Secret clearance or higher required.
React, Redux, TypeScript, Vite, MUI, Python, Quart, FastAPI, PostgreSQL, Redis, S3, AWS, Docker, Kubernetes, Terraform, GitHub Actions, GitLab, Bash
12h
Save
Mark Applied
Hide
Full Stack Developer
Washington, District of Columbia, United States
$180k-$210k/yr OnsiteFull Time
Core4ce
Core4ce: Private national-security contractor delivering cyber, analytics, engineering, and mission solutions to defense and intelligence customers.
Requires TS/SCI Full Scope Poly clearance, JavaScript frameworks, microservices, cloud development, SQL/NoSQL databases, and RESTful API experience. React, TypeScript, React Query, Python, AWS, and DevOps preferred.
JavaScript, AWS, SQL, NoSQL, RESTful APIs, React, TypeScript, React Query, Python, AWS Lambda, DynamoDB, Camunda, Flowable, N8n-io
14h
Save
Mark Applied
Hide
Full Stack Engineer
Columbia, Maryland, United States
$102k-$114k/yr RemoteFull Time
eSimplicity
eSimplicity: Private U.S. digital services delivering data, software, AI, and spectrum solutions to government agencies.
4+ YOERequires 4+ years of related experience, bachelor's degree, public trust clearance eligibility, cloud experience, Python and Django, frontend frameworks, APIs, databases, Docker, testing, Git, Agile, and Jira/Confluence.
AWS, Python, Django, HTML, CSS, JavaScript, TypeScript, Node.js, React, Angular, JSON, Web APIs, REST APIs, JSON-RPC, XML-RPC, GraphQL, Docker, SQL, MySQL, NoSQL, PostgreSQL, MongoDB, Grafana, Sentry, Prometheus, Git, AWS DevSecOps, Active Directory, Okta, AWS IAM Policies/Roles, Atlassian Jira, Atlassian Confluence
15h
Save
Mark Applied
Hide
Full Stack Developer
Washington, District of Columbia, United States
OnsiteFull Time
SOS International
SOS International: Technology and services integrator for government and defense missions.
Professional experience with Python, Java, JavaScript, C++, cloud computing, Oracle, Git, Flask, and Django; active Top Secret clearance required.
Python, Java, JavaScript, C++, Oracle, Git, Flask, Django, Extract Transform Load (ETL)
1d
Save
Mark Applied
Hide
Full Stack Developer
Washington, District of Columbia, United States
$151k-$153k/yr OnsiteFull Time
Cayuse Holdings
Cayuse Holdings: Tribally owned technology and government-services holding serving commercial, government, and tribal clients.
5+ YOEBachelor's or master's degree in Computer Science, 5 years of relevant experience, active Top Secret clearance with SCI eligibility, and proficiency with JavaScript, cloud platforms, databases, and Microsoft tools.
Java, PostgreSQL, Tomcat, JBoss, Amazon Web Services (AWS), Microsoft Excel, Microsoft Word, Microsoft PowerPoint, Adobe Acrobat, React, SQL, NoSQL, Entity Framework, Docker, GitLab
1d
Save
Mark Applied
Hide
SAP NS2 Full Stack Developer
Herndon, Virginia, United States
$152k-$341k/yr HybridFull Time
SAP
SAPNYSE: SAP: Global leader in enterprise application software and cloud services.
7+ YOEBachelor's degree in computer science, information systems, or related field; 7–10 years of experience; expertise in SAP HANA, S/4HANA, ABAP, SQL, data modeling, performance tuning, and reporting tools.
SAP HANA, S/4HANA, COGNOS, Informatica, SAP HANA studio, SAP ADT, BW/4HANA, Business Objects, Microsoft Power BI, Tableau, Jupyter Notebooks, ABAP, SQL, Smart Data Access, Smart Data Integration, Agile, Waterfall
1d
Save
Mark Applied
Hide
Full Stack Engineer
Alexandria, Virginia, United States
$90k-$115k/yr RemoteFull Time
LightFeather
LightFeather: Provide DevSecOps and cloud solutions to federal government agencies.
7+ YOEBachelor's degree or equivalent experience, 7+ years of full stack development, Java and Spring Boot, RESTful APIs, JavaScript, React, HTML, CSS, relational databases, Agile delivery, and U.S. citizenship with Public Trust eligibility.
Palantir, Java, Spring Boot, RESTful APIs, JavaScript, React, HTML, CSS, Agile
1d
Save
Mark Applied
Hide
Full Stack Developer Mid
Washington, District of Columbia, United States
$155k-$165k/yr OnsiteFull Time
E-INFOSOL
E-INFOSOL: Provides secure cloud and cybersecurity solutions for government agencies.
5+ YOEActive Top Secret clearance, bachelor's degree, and 5+ years' experience. Requires .NET, ASP.NET, Entity Framework, SQL Server, React, TypeScript, JavaScript, Node.js, HTML5/CSS3, GitLab, and cloud platform experience.
.NET, React, TypeScript, JavaScript, Node.js, HTML5, CSS3, GitLab, ASP.NET, Entity Framework, SQL Server, C#, ADO.NET, REST, RPC, AWS, Azure, SQL, NoSQL, Docker, CI/CD, Microsoft Azure