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116 sr security software engineer jobs at 63 companies in Loveland, CO

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Sr. Software Engineer
Denver, Colorado, United States
$95k-$135k/yr HybridFull Time
Vertafore
VertaforeNYSE: ROP: Provides cloud-based software solutions for the insurance industry.
5+ YOERequires 5–7 years of C# and ASP.NET experience, advanced MS SQL skills, enterprise software design, security practices, automated testing, CI/CD pipelines, AI development tools, and mentoring experience.
C#, ASP.NET, MS SQL, GitHub Copilot, Claude, ChatGPT, xUnit, NUnit, Selenium, Playwright, GitLab, TDD, BDD, CI/CD, LLM
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3mo
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Sr Software Engineer, Ground Software
Centennial or Louisville
$157k-$215k/yr OnsiteFull Time
Sierra Space
Sierra Space: Develops spacecraft and infrastructure for orbital and space transportation
8+ YOEBachelor's degree or equivalent, 8+ years experience, multiple programming languages, design/architect complex software, Agile/Scrum, leadership, security clearance eligibility.
Python, React, Git, GitHub, GitLab, Bitbucket, FastAPI, Kubernetes, Helm, ArgoCD, JIRA, Confluence, Bash, PowerShell, Ansible, Docker, AWS, MySQL, PostgreSQL, MongoDB
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3mo
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Senior Software Security Engineer
Golden, Colorado, United States
$130k-$180k/yr OnsiteFull Time
Loft Federal
Loft Federal: Provides rapid orbital access for national security space missions.
5+ YOE5+ years in software development; 3+ years in security-focused roles; strong knowledge of DevSecOps, Zero Trust, container security; secure SDLC practices; scripting (Python, Bash, C++); Linux hardening; IaC; CI/CD security; security certifications.
Python, Bash, C++, Linux, IaC, Terraform, Helm, Ansible, SAST, DAST, SCA, SBOM, SonarQube
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3w
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Sr. Software Engineer (Contract)
Arlington or Denver or Houston or Merritt Island or United States
RemoteContract
Airbus U.S. Space & Defense
Airbus U.S. Space & DefenseEuronext Paris: AIR: Provides satellite, helicopter, and cybersecurity solutions for U.S. defense.
8+ YOEBachelor's in STEM (Masters preferred). 8 years' experience (6 with Masters) designing and developing embedded/aerospace software. Proficiency in C/C++. US citizenship and ability to obtain government security clearance required.
C, C++
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3w
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Senior Software Engineer, Identity Security (Golang)
Denver, Colorado, United States
OnsiteFull Time
Apple
AppleNASDAQ: AAPL: Designs and sells consumer electronics, software, and online services.
Deep technical expertise in security and identity for cloud workloads, large-scale operations experience, and strong software engineering skills.
Golang
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1mo
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Software Development Engineer III / Sr. Software Development Engineer - AI Platform
Boulder, Colorado, United States
$156k-$234k/yr HybridFull Time
Workday
WorkdayNASDAQ: WDAY: Provides cloud-based software for financial and human capital management.
5+ YOE5+ years software development experience (SDE III) or 8+ years for senior; strong distributed systems, backend/platform engineering, security and observability; proficiency in Java, Go, Rust, or Python; production reliability and API experience.
Java, Go, Rust, Python
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1mo
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Sr Full Stack Software Developer
Denver or Sterling
$82k-$172k/yr OnsiteFull Time
CACI International
CACI InternationalNYSE: CACI: Provides information technology and engineering services for government agencies.
5+ YOEActive TS/SCI clearance with polygraph preferred, 5+ years software development, proficiency in Java and JavaScript, Linux experience, willingness to obtain Security+; Bachelor's in CS or accredited bootcamp required.
Java, JavaScript, Linux, Kubernetes, Elasticsearch, Java Spring Boot framework, AWS, WebSocket's, RESTful API
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1mo
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Sr Full Stack Software Developer
Denver or Sterling
$82k-$172k/yr OnsiteFull Time
CACI
CACINYSE: CACI: Provides information technology and professional services to government clients.
5+ YOEActive TS/SCI clearance (polygraph preferred), 5+ years software development, proficiency in Java and JavaScript, Linux experience, bachelor's in CS or coding bootcamp, Security+ (or willingness), cloud and microservice experience.
Java, JavaScript, Linux, Kubernetes, Elasticsearch, Spring Boot, AWS, WebSocket, RESTful API
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2w
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Sr. Satellite Flight Software Engineer - TeraWave
Seattle or Denver
$182k-$277k/yr OnsiteFull Time
Blue Origin: Develops reusable rockets and systems for human spaceflight.
10+ YOEBachelor's degree,10+ years embedded/flight software experience for spacecraft or mission-critical systems; proficiency in C/C++,Python,RTOS,EMBEDDED LINUX/VxWorks/QNX; experience with CI/CD, verification, and secure software practices.
C, C++, Python, Embedded Linux, VxWorks, QNX, TCP/IP, UDP, CAN, I2C, SPI, RS-422/485, core Flight System (cFS), F Prime, Software-in-the-loop (SIL), Hardware-in-the-loop (HIL), CI/CD
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2mo
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Senior Software Engineer
Denver or Salem
$130k-$150k/yr OnsiteFull Time
AutoStore
AutoStoreOslo Stock Exchange: AUTO: Robotic cube storage systems for automated warehouse fulfillment.
5+ YOE5+ years in software development; Bachelor’s or Master’s in CS/Engineering; strong API, security, and data tooling experience.
Git, OpenAPI, OAuth, RabbitMQ, Apache Kafka, Azure Service Bus, Event Hubs, Azure Databricks, TypeScript, C#, F#, PostgreSQL
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3w
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Senior Software Engineer — PingOne Platform Administration & Security
United States or Denver
$110k-$138k/yr RemoteFull Time
Ping Identity
Ping Identity: Provides identity and access management software for enterprise security.
5+ YOE5+ years software engineering experience with backend services; Java and NodeJS experience; TypeScript and REST API familiarity; experience with SaaS, CI/CD, distributed systems, and mentoring peers.
Java, NodeJS, TypeScript, REST APIs, CI/CD, MCP
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Sr Principal Real-time Software Engineer
Aurora, Colorado, United States
$132k-$252k/yr OnsiteFull Time
RTX
RTXNYSE: RTX: Provides advanced aerospace and defense systems and services.
10+ YOESTEM degree and 10+ years relevant experience required, including embedded C++ or security or architecture experience, RTOS expertise, hardware-firmware-software integration, and active Secret clearance.
C++, Real-Time Operating System (RTOS), Green Hills, Integrity, Wind River VxWorks, Linux, VHDL, Verilog, Microsoft Excel
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2mo
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Principal Software Engineer
Denver, Colorado, United States
$225k-$270k/yr HybridFull Time
FusionAuth
FusionAuth: Provides authentication and user management software for developers.
12+ YOEBachelor's in CS or equivalent; 12+ years software engineering; 5+ years in identity/security; hands-on leadership; strong Java; CIAM expertise.
Java, PostgreSQL, MySQL, OAuth, OpenID Connect, SAML, SCIM
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1w
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Senior Software Engineer- DevOps
Littleton or Denver
$151k-$205k/yr OnsiteFull Time
Four Sea Group
Four Sea Group: Technical mission support and software engineering for aerospace.
6+ YOEBachelor’s degree or equivalent practical experience; 6+ years in software, DevOps, cloud, or platform engineering; active Top Secret clearance; cloud, containers, CI/CD, Linux, automation, networking, and security experience.
AWS, Azure, Google Cloud, Docker, Kubernetes, OpenShift, GitLab CI, Jenkins, Linux, Angular, React, Java, Amazon Web Services, Ansible, Puppet, Terraform, CloudFormation, GitLab, Argo CD, Prometheus, Grafana, OpenTelemetry, ELK Stack, ESXL, SAFe
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1w
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Senior Software Engineer, Radar
Broomfield or Fort Collins
$190k-$252k/yr OnsiteFull Time
Anduril Industries
Anduril Industries: Defense technology building autonomous military hardware and software.
5+ YOE5+ years software development experience; proficiency in C++; experience with Nix/NixOS, API design, reproducible builds, and software quality/security practices; Bachelor's in CS/CE or related.
C++, Python, Nix, NixOS, Lattice OS, gRPC, Protobuf, ZeroMQ, DDS, Docker, Linux
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2mo
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Embedded Software Engineer
Boulder, Colorado, United States
$93k-$133k/yr HybridFull Time
Emerson
EmersonNYSE: EMR: Engineering industrial automation and software solutions for global industries.
5+ YOEBS in engineering or related field, 5+ years embedded real-time software development experience with Linux-based systems, proficiency in C/C++, bash and Python, Git, familiarity with hardware interfaces and security standards, autonomous design skills, and legal US work authorization.
Linux, NXP PowerPC, C, C++, bash, Python, Git, Yocto, LFS, Gentoo, GDB, KernelShark, ftrace, Azure DevOps, TCP/IP, TLS, I2C, SPI, UART, oscilloscope, logic analyzer, debugger
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1mo
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Staff Software Developer
Boulder, Colorado, United States
$128k-$229k/yr OnsiteFull Time
General Atomics
General Atomics: Designs and manufactures unmanned aircraft and nuclear technology systems.
7+ YOERequires advanced software development experience (C++, Linux, multithreading, TCP/UDP sockets), 7+ years' experience (varies by degree), ability to obtain DoD security clearance, and strong communication and testing skills.
C++, TCP, UDP, Linux, GitLab, Git, Bash, Python, ZYNQ Ultrascale, Xilinx SDK, PetaLinux, SPI, I2C, UART, Ethernet, Unit Testing Tools
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2mo
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Product Security Engineer
San Francisco or Denver or New York
$180k-$258k/yr HybridFull Time
Candid Health
Candid Health: Automates medical billing and revenue cycle management for healthcare providers.
5+ YOE5+ years in software or security engineering focusing on product security; strong cloud and web security knowledge; collaboration and problem solving.
SAST, DAST, SCA, CI/CD, Cloud Platforms, Kubernetes, Python, Go, Java, JavaScript
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Senior Radar Software Engineer
Denver, Colorado, United States
OnsiteFull Time
LeoLabs
LeoLabs: Provides orbital intelligence and space domain awareness services.
7+ YOEBachelor's degree in CS/SE/EE,7+ years software engineering experience, proficiency in Python/C++ and Linux, experience with distributed systems, CI/CD and DevOps, U.S. citizenship and ability to obtain personnel security clearance.
Python, C++, Linux, CI/CD, DevOps
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Principal Software Engineer – Cloud Systems
Denver, Colorado, United States
$140k-$170k/yr OnsiteFull Time
Kongsberg Satellite Services
Kongsberg Satellite Services: Provides global satellite ground station and communication services.
10+ YOE5+ Mgmt10+ years software engineering, 5+ years technical leadership, expertise in cloud-native architectures, Kubernetes, Python/Rust, cloud migrations, CI/CD, databases, security, and ability to obtain U.S. DoD Secret clearance.
Python, Rust, Kubernetes, Docker, Microsoft Azure, Microsoft Azure Government, AWS GovCloud, OpenStack, Helm, GitLab CI/CD, Terraform, Ansible, Prometheus, Grafana, Loki, Service Mesh, REST API
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