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42 software engineer i jobs at 25 companies in Longmont, CO

1mo
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Software Engineer I
Seattle or Denver or Beaverton or Springfield or Bengaluru
$122k-$157k/yr HybridFull Time
DAT Freight & Analytics
DAT Freight & Analytics: Software platform for freight matching and logistics data analytics.
1+ YOE1+ years professional software engineering experience. Familiarity with TypeScript/Node.js/JavaScript, SQL, production systems, CI/CD, containerization, and willingness to participate in on-call rotation.
Node.js, TypeScript, React, Kafka, RabbitMQ, SQS, Docker, Kubernetes, Terraform, CloudFormation, AWS, Datadog, OpenSearch/ELK, Prometheus, Grafana, CI/CD, SQL, Java, C#, Go, REST, GraphQL
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2w
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Engineer I - Software
Boulder or Broomfield or Westminster
$65k-$110k/yr OnsiteFull Time
BAE Systems
BAE SystemsLondon Stock Exchange: BA: Provides advanced defense, aerospace, and security technology solutions.
BS in engineering or related required; experience with satellite ground systems, ground-system tools, cloud, web services, and back-end/front-end languages; eligible for Top Secret/SCI clearance.
COSMOS, ECLIPSE, OS/COMET, OASIS, AWS, Lambda, Docker, Kubernetes, Spring, Jersey, Flask, CherryPy, Ruby on Rails, JavaScript, Angular, React, JavaFX, Python, Qt, SQL, NoSQL, JPA/ORM, Java, C++, Rust, Ada
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23h
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Flight Software Engineer I
Littleton, Colorado, United States
$85k-$100k/yr OnsiteFull Time
Rocket Lab
Rocket LabNasdaq: RKLB: Operates launch vehicles and manufactures satellites for space missions.
Bachelor's degree in aerospace, computer science, electrical engineering, or equivalent; embedded software experience; C and C++; RTOS or Embedded Linux experience; U.S. citizenship required.
Real Time Operating System (RTOS), Embedded Linux, C, C++, Continuous Integration, CAN, CAN-FD, UDP, TCP, PDR, CDR
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1mo
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Software Engineer I - Ground Software
Greenwood Village or Austin or Laurel
$70k-$125k/yr HybridFull Time
York Space Systems
York Space SystemsNYSE: YSS: Designs and manufactures modular spacecraft platforms and mission solutions.
0+ YOEEarly‑career full‑stack engineer; 0–1 years experience; bachelor's (or pursuing) in CS or related; foundational React/Angular knowledge; familiarity with TypeScript, C#, REST, Git, SQL, front-end tools; ability to obtain security clearance.
React, TypeScript, C#, .NET, Docker, Kafka, REST, Yarn, Babel, Material-UI, Git, SQL, TanStack Query
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3mo
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Software Engineer I
East Lansing or Denver or Canada or India
$63k/yr HybridFull Time
Vertafore
VertaforeNYSE: ROP: Provides cloud-based software solutions for the insurance industry.
No experience required. Proficiency in coding languages/frameworks, SDLC, Agile/Scrum; knowledge of relational and NoSQL databases helpful; strong communication, analytical skills, and ability to learn quickly.
Agile, Scrum, NoSQL, Relational databases, AI
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23h
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Flight Software Engineer I
Littleton, Colorado, United States
$85k-$100k/yr OnsiteFull Time
Rocket Lab
Rocket LabNASDAQ: RKLB: Designs and builds launch vehicles and satellite systems.
Bachelor's degree in a technical field, embedded software development experience, C and C++ proficiency, RTOS or Embedded Linux experience, and U.S. citizenship required.
Real Time Operating System (RTOS), Embedded Linux, C, C++, Continuous Integration, CAN, CAN-FD, UDP, TCP
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1d
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Software Engineer I - Lab - 934
Broomfield, Colorado, United States
$88k-$110k/yr OnsiteFull Time
Quantinuum
Quantinuum: Building full-stack quantum computing hardware and software systems.
2+ YOEBachelor’s degree and 2+ years in a relevant technical field required. Must meet U.S. person and national security requirements. Hardware integration and embedded software experience valued.
Docker, Jenkins, CI/CD, LLVM
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2mo
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Software Engineer I, QA
Denver or Long Beach
$65k-$110k/yr OnsiteFull Time
True Anomaly
True Anomaly: Develops autonomous spacecraft and software for space security missions.
0+ YOE0-2 years in software QA/testing; BS in CS or related field; knowledge of SDLC, Agile; familiarity with Jira and Git; strong attention to detail and communication; US citizen eligible for DoD Secret or TS/SCI clearance
Playwright, Cypress, Selenium, API testing tools, Git, Jira, GitHub Actions, Jenkins
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2w
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Project Engineer I- Software
Westminster, Colorado, United States
$118k-$201k/yr OnsiteFull Time
BAE Systems
BAE SystemsLondon Stock Exchange: BA: Provides advanced defense, aerospace, and security technology solutions.
6+ YOEBS in Engineering plus 6+ years related experience, current Secret clearance with ability to obtain TS/SCI, experience leading software teams, agile leadership, Atlassian (Confluence,Jira).
Confluence, Jira, Jama, DOORS
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1mo
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Software Engineer I - Trust Tech
Copenhagen or Edinburgh or London or Amsterdam or Denver or Hamburg or Melbourne or Milan or New York
OnsiteFull Time
Trustpilot
TrustpilotLondon Stock Exchange: TRST: Operates an online consumer review and business insights platform.
Experience in full‑stack web development with emphasis on backend systems; strong JavaScript/TypeScript and Node.js skills; knowledge of SQL/NoSQL databases, React, and AWS or GCP.
TypeScript, JavaScript, React, Node.js, PostgreSQL, DynamoDB, BigQuery, AWS, GCP, ECS, Lambda, SNS, SQS, CloudFormation, Docker, Terraform, Serverless Framework, Next.js, CSS Modules, GitHub Actions
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3mo
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Electronics Engineer I - SATCOM
Westminster, Colorado, United States
$82k-$98k/yr OnsiteFull Time
CesiumAstro
CesiumAstro: Develops phased array communication systems for satellites and aircraft.
BS in Electrical Engineering; experience in board-level electronics design, analysis, and test; strong EE fundamentals; knowledge of software and mechanical interfaces; proficiency with lab equipment; excellent communication.
Altium, Cadence, KiCAD, LTSpice, Oscilloscopes, Power supplies, Multimeters, Logic analyzers
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1mo
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Software Engineer I, Model and Simulation
Broomfield, Colorado, United States
$90k-$125k/yr OnsiteFull Time
Katalyst Space Technologies
Katalyst Space Technologies: Develops robotic spacecraft for in-orbit satellite servicing and maneuvering.
1+ YOE1-3 years modeling & simulation experience, 2-3 years C++ and Python, BS in a STEM field, strong OOP and distributed systems understanding, problem-solving and attention to detail.
C++, Python, Basalisk, STK, GMAT
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3d
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CIRES / NOAA NCEI Software Engineer Associate Scientist I
Boulder, Colorado, United States
$62k-$78k/yr HybridFull Time
University of Colorado Boulder
University of Colorado Boulder: Public research university offering undergraduate and graduate education programs.
Bachelor's degree in computer science, engineering, mathematics, physical sciences, or STEM field; programming proficiency and ability to independently write and maintain code. U.S. work authorization required.
Java, JavaScript, Bash, Linux, AWS, Crosschq
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2d
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2026 Intern Conversion - Software Development Engineer I
Seattle or Van Horn or Denver or Huntsville or Arlington or Los Angeles or Longmont or Reston or Florida
$101k-$155k/yr OnsiteFull Time
Blue Origin: Develops reusable rockets and systems for human spaceflight.
Completed a 2026 Blue Origin internship, enrolled in or recently graduating from college, B.S. in mechanical, aerospace, or astronautical engineering, and eligible to work under U.S. export controls.
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2mo
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Senior Systems Software Engineer - Data Path
Centennial or Mendota Heights
$160k-$200k/yr HybridFull Time
Quantum
QuantumNASDAQ: QMCO: Provides data storage and management solutions for unstructured data.
15+ YOE15+ years C/C++ systems development experience; expertise in low-latency code, concurrency, distributed systems, storage protocols, Linux I/O and performance optimization; strong communication and teamwork; able to work hybrid in Centennial, CO or Mendota Heights, MN.
C, C++, NVMe-over-Fabrics (NVMe-oF), RDMA, Linux I/O subsystem, Linux, Kubernetes, Git, Jira, SMB, NFS
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1w
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Civil Engineer I
Lakewood, Colorado, United States
$65k-$80k/yr HybridFull Time
Bowman
BowmanNASDAQ: BWMN: Provides engineering, surveying, and infrastructure management services.
Bachelor's in civil engineering required. Entry-level role; EIT preferred. Experience with land/site development, drainage and modeling tools preferred; proficiency with civil design software and Microsoft Office required.
Civil3D, AutoCAD, AES, CIVILD, WSPGW, PCSWMM, StormCAD, HEC-HMS, HEC-RAS, Microsoft Word, Microsoft Excel, Microsoft PowerPoint, Microsoft Outlook, Microsoft Projects
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1mo
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Electrical Engineer I
Lakewood, Colorado, United States
$70k-$85k/yr OnsiteFull Time
NEI Electric Power Engineering
NEI Electric Power Engineering: Engineers high-voltage electrical infrastructure and renewable energy systems.
0+ YOEBSEE or BSEET, EIT/FE preferred, 0+ years engineering experience, AutoCAD and Microsoft Office proficiency, knowledge of power system software (Aspen, PSSE, ETAP, SKM), ability to travel ~25-30%.
AutoCAD, Microsoft Excel, Microsoft Word, Aspen, PSSE, ETAP, SKM, SCADA, PLC
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3mo
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Lead Engineer I - GenAI
Denver, Colorado, United States
HybridFull Time
KPMG
KPMG: Global professional services network providing audit, tax, and advisory.
5+ YOE5+ years software development and systems architecture experience; Bachelor’s in computer science/engineering required, Master’s preferred; strong Python, ML framework, microservices, REST, Azure, and GenAI experience.
Angular, TypeScript, Python, .NET Framework, C#, SQL, T‑SQL, Azure, App Services, Functions, SQL Database, DevOps, PyTorch, TensorFlow, scikit‑learn, Azure OpenAI, LangChain, LangGraph
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2mo
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Software Engineering Manager I
Denver, Colorado, United States
$120k-$160k/yr HybridFull Time
bet365
bet365: Provides global online sports betting and digital casino games.
Proven experience leading development teams; hands-on with C#, Golang, TypeScript; familiarity with cloud (GCP/GKE), Google Spanner, Kafka, microservices, performance testing, mobile tech, and mentoring engineers.
Golang, Google Spanner, C#, SQL, GCP, Kafka, WPF, React, TypeScript, GKE, SaaS
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2d
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Engineer I
Aurora, Colorado, United States
$25/hr OnsiteFull Time
Marriott International
Marriott InternationalNASDAQ: MAR: Operates and franchises a global network of hotels and resorts.
High school diploma or GED preferred, driver's license required, and some general maintenance, painting, or hotel engineering experience preferred. Must handle physical maintenance tasks and use basic computer skills.
Lockout/Tagout, computers
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