32 sr security software engineer jobs at 17 companies in Windsor, CO
3mo
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Sr Software Engineer, Ground Software
Centennial or Louisville
$157k-$215k/yr OnsiteFull Time
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
6d
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Senior Software Engineer, Radar
Broomfield or Fort Collins
$190k-$252k/yr OnsiteFull Time
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
1mo
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Embedded Software Engineer
Boulder, Colorado, United States
$93k-$133k/yr HybridFull Time
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
1mo
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Staff Software Developer
Boulder, Colorado, United States
$128k-$229k/yr OnsiteFull Time
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
1mo
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Senior Cybersecurity Systems Software Engineer
Colorado Springs or Durham or Spring or Fort Collins or Andover
$170k-$323k/yr HybridFull Time
10+ YOEBachelor’s degree in CS/Engineering/Info Systems, 10+ years cybersecurity engineering and software development, experience with security architectures, standards and certifications, strong communication and executive influence skills.
Post-Quantum Cryptography (PQC), EU Cyber Resilience Act (EU CRA), 802.1AR Device Identities, NIST SP 800-53, DISA SRG/STIG, Common Criteria, Agentic AI, FIPS, TLS, SSH, Cryptography
2mo
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Staff / Sr Staff Numerical Algorithm Software Engineer
Boulder, Colorado, United States
$98k-$146k/yr OnsiteFull Time
2+ YOEBachelor’s or Master’s in technical field; 2+ years in numerical algorithms for signal/image processing; Python and C++ expertise; Linux development; Agile; DoD security clearance preferred.
Python, C++, Linux, CI/CD, Docker, Kubernetes
4d
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Senior Software Engineer
United States or Westminster or Herndon
$128k-$216k/yr RemoteFull Time
6+ YOEU.S. citizen with active Top Secret security clearance or CBP/DHS suitability, bachelor\u0002s degree or equivalent experience, 6+ years development experience with strongly-typed and scripting languages, agile experience, and ability to lead technical efforts.
Java, Rust, Python, JavaScript, TypeScript, Jira, Confluence, git, Apache Flink, Apache Kafka, React, Next, Leaflet, Map Libre, Redux, AWS, Azure, Google Cloud, OpenStack, Kubernetes, Docker, Jenkins, ArgoCD, Harness, GitLab CI, GitHub Actions, PostgreSQL, Apache Iceberg
1mo
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Senior/Staff Software Engineer
Boulder or New York City
$155k-$200k/yr HybridFull Time
Deep expertise designing and evolving distributed scalable systems, strong focus on performance/security/compliance, IaC and scripting experience (Terraform/CloudFormation, Python/Bash/Go), and leadership/mentorship skills.
Java, Kafka, Redpanda, AWS, Databricks, Datadog, ONNX, Terraform, CloudFormation, Python, Bash, Go
3w
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Software Engineer
Loveland, Colorado, United States
$111k-$185k/yr OnsiteFull Time
5+ YOEBS/MS in EE/CE/CS,5+ years software development in C#/C++,experience with RF and PNA/VNA preferred,ability to obtain US DOD security clearance,eligible U.S. person,10-25% travel,strong communication and problem-solving skills.
C#, C++, PNA, VNA, Confluence, Jira, BitBucket, signal generator, signal analyzer
1mo
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Software Development Engineer, AI Platform
Boulder, Colorado, United States
$130k-$196k/yr HybridFull Time
5+ YOE5+ years backend engineering experience; Kubernetes and CRD experience; knowledge of network rules/istio/iptables; familiarity with agent sandboxes (LangChain, AWS AgentCore, Google ADK); distributed systems, security fundamentals, testing, monitoring, and strong communication.
Kubernetes, Custom Resource Definitions (CRDs), Istio, iptables, LangChain, AWS AgentCore, Google ADK
1w
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Senior System Software Engineer - CPU SoC Boot Firmware
Santa Clara or Boulder
$152k-$288k/yr OnsiteFull Time
5+ YOEBS/MS in EE/CS/CE or equivalent,5+ years embedded/software experience,proficiency in C and Python,Linux kernel expertise,ARM/bootloader experience,and knowledge of safety/security standards.
C, Python, Linux kernel, Codex
4d
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Software Engineer - Level 3 or 4 (Mathematician)
Boulder, Colorado, United States
$114k-$171k/yr OnsiteFull Time
5+ YOERequires experience in modern C++ and Python, strong math and state-estimation background, active U.S. security clearance, and experience with Linux; 5+ years experience typical for hire.
Linux, C++, Python, Plotly, JavaScript, SQL
4d
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Cybersecurity Software Engineer - Level 3 or 4
Boulder, Colorado, United States
$114k-$213k/yr OnsiteFull Time
5+ YOERequires DoD 8570 IAT Level II+ certification, active U.S. Secret clearance, 5+ years related experience (Level 3) or 8+ years (Level 4), cybersecurity and DevSecOps experience, familiarity with NIST/RMF and cloud security.
Tenable Security Center, Nessus, Splunk, LogRhythm, Linux, HBSS, ACAS, Python, C++
1w
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Senior System Software Engineer - CPU SoC Boot Firmware
Santa Clara or Boulder
$152k-$288k/yr OnsiteFull Time
5+ YOE5+ years embedded/OS experience, strong C and Python skills, Linux kernel and ARM expertise, experience with boot/firmware development, OS/kernel programming, and safety/security standards.
C, Python, Linux kernel, ARM, Codex
2mo
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Staff Engineer, Ground Systems
Arvada, Colorado, United States
OnsiteFull Time
8+ YOE8+ years building or operating aerospace/satellite/mission-critical software, strong systems and software breadth, experience with satellite ground systems/mission operations, effective cross-team communication, and active U.S. security clearance.
2mo
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Principal Application Security Architect - 861
Broomfield, Colorado, United States
$184k-$230k/yr OnsiteFull Time
10+ YOEBachelor's degree; 10+ years in app security; 5+ years software engineering; US person; security and compliance expertise.
SAST, DAST, CI/CD, OWASP Top 10, AWS, Azure, GCP, Python, Java, JavaScript, Go, Jenkins, Git
2w
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Sr. DevOps (8-12 yrs)
Westminster, Colorado, United States
$125k-$145k/yr OnsiteFull Time
8+ YOE8+ years DevOps experience, AWS/Azure/GCP expertise, infrastructure as code, CI/CD, monitoring (Prometheus/Grafana/ELK), Python/bash, Security+ required, Top Secret clearance and U.S. citizenship required.
Prometheus, Grafana, ELK Stack, Python, bash, AWS, Azure, Google Cloud Platform, Git, Kubernetes
2d
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Senior Digital Engineer
Wheat Ridge, Colorado, United States
$105k-$131k/yr OnsiteFull Time
5+ YOEBachelor's or equivalent,5+ years software engineering,3+ years web application experience,AWS,Terraform,CI/CD,AI-assisted development,Git; strong architecture, security, and healthcare/regulatory experience preferred.
Claude Code, GitHub Copilot, ChatGPT, Cursor, AWS, Terraform, Docker, Kubernetes, CloudFront, Route 53, Lambda, ECS, EKS, S3, RDS, GitHub Actions, Azure DevOps, Jenkins, React, TypeScript, JavaScript, HTML5, CSS3, Tailwind CSS, Python, .NET Core, REST APIs, GraphQL, Git
1d
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Director of Product Management, Cloud Security
Broomfield, Colorado, United States
HybridFull Time
Substantial enterprise software product management experience, including leading product managers; deep cybersecurity expertise; ownership of strategy through measured releases; strong engineering collaboration, writing, and executive presentation skills.
SIEM