33 sr api developer jobs at 21 companies in Windsor, CO
2w
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Senior Full-Stack Lead Developer
Broomfield, Colorado, United States
$89k-$125k/yr HybridFull Time
5+ YOE5+ years C# application development, Web API and Agile experience; SQL Server, HTML/CSS/JavaScript; experience leading developers, BS/MS in CS or related field; strong communication and leadership.
C#, .NET, Web API, Angular, WPF, Microsoft SQL Server, HTML, CSS, JavaScript, Git
1mo
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Staff Software Engineer
Broomfield, Colorado, United States
$145k-$185k/yr HybridFull Time
10+ YOE10+ years full‑stack software engineering experience; deep Ruby on Rails and Vue.js expertise; API and MySQL proficiency; proven technical leadership and mentoring; experience with AI-assisted development tools.
Ruby on Rails, ActiveRecord, Vue.js, MySQL, GitHub Copilot, Cursor, Claude Code, Go (Golang), Node.js, Anthropic, OpenAI, AWS, OpenSearch, Redis, Kafka, Docker, CI/CD
1w
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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
3w
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R&D Software Engineer
Boulder, Colorado, United States
$110k-$150k/yr OnsiteFull Time
5+ YOERequires a STEM bachelor's degree, 5+ years of professional C# programming, software application design, manufacturing experience preferred, and familiarity with databases, development frameworks, and equipment interfaces.
C#, WPF, ADO.NET, Entity Framework, WCF, Microsoft SQL Server, TSQL, MVVM, Windows Services, MVC, JavaScript, Web API, Git, GitHub, Microsoft Visual Studio, Visual Studio Code, C++, Python, SCADA, RS232, RS488
1w
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Staff Linux Software Engineer (Multiple Locations)
San Diego or Boulder
$135k-$202k/yr OnsiteFull Time
2+ YOEExperience developing Linux system software and drivers in C/C++; strong understanding of Linux internals, multi-threading, API design, SoC architecture; proficiency with git and debugging tools.
Linux, C, C++, Java, Python, git, KVM, Docker, SR‑IOV, gtest, PCIe, UML
3w
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Senior Fullstack Engineer
Boulder, Colorado, United States
$135k-$160k/yr HybridFull Time
7+ YOE7+ years software engineering experience, strong C#/.NET and SQL Server expertise, JavaScript familiarity, distributed systems and API design, technical leadership and mentoring.
C#/.NET, SQL Server, JavaScript
1mo
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Senior Software Engineer - Java/Kotlin
Boulder, Colorado, United States
$131k-$167k/yr OnsiteFull Time
5+ YOEBachelor's in CS/CE/SE or equivalent and 5+ years experience; mastered Java/Kotlin with Spring; experience designing software systems, microservices, REST APIs, databases, Docker/Kubernetes; strong communication and leadership skills.
Java, Kotlin, Spring Framework, Spring Boot, Spring Cloud, Spring Security, WebFlux, Microservices, RESTful API, Relational Databases, NoSQL, Docker, Kubernetes, Lit, Angular, Svelte, React, Vue, Agile
2w
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Data Engineer
Boulder, Colorado, United States
OnsiteFull Time
5+ YOE5+ years data engineering experience, strong SQL and PostgreSQL skills, ETL/ELT and API integration experience, SnapLogic, AWS, Git, Python, Linux/MacOS scripting, bachelor's degree in a related field.
SQL, PostgreSQL, SnapLogic, GIT, AWS, python, Linux, MacOS, REST API
1mo
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Senior Storage Systems Engineer
Fort Collins, Colorado, United States
$160k-$303k/yr OnsiteFull Time
6+ YOE6+ years systems or storage development experience; expertise in Linux, C/C++, Go/Python/Bash, storage filesystems, networking, hardware, APIs, containerization, debugging, and system integration.
systemd, RHEL, Rocky, C, C++, Go, Python, Bash, RAID, ZFS, XFS, ext4, Pacemaker, Corosync, TCP/IP, Ethernet, IB, RDMA, RoCE, SAS, SCSI, NVMe, HBAs, REST, HTTPS, gRPC, Redfish, Swordfish, Docker, Podman, KVM, VMware
1mo
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Senior Storage Systems Engineer
Fort Collins, Colorado, United States
$160k-$303k/yr OnsiteFull Time
6+ YOE6+ years systems/storage development experience; Linux (systemd, RHEL/Rocky) expertise; programming in C/C++, Go, Python, Bash; storage, networking, hardware, APIs, containerization, virtualization skills.
Linux, systemd, RHEL, Rocky, C/C++, Go, Python, Bash, RAID, ZFS, XFS, ext4, Pacemaker, Corosync, TCP/IP, Ethernet, IB, RDMA, RoCE, SAS, SCSI, NVMe, HBAs, REST/HTTPS, gRPC, Redfish, Swordfish, Docker, Podman, KVM, VMware
2w
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Senior Security Automation & SOAR Engineer
New York or Boulder or Princeton
$140k-$155k/yr OnsiteFull Time
5+ YOE5+ years designing and implementing SOAR automation, strong incident response experience, Python and YARA proficiency, REST API and integrations, SIEM/SOAR/EDR platform expertise, AWS and IaC experience, data analysis with Pandas/SQL/Elasticsearch.
Python, YARA, REST API, Splunk, Elastic, Sentinel, Phantom, XSOAR, Swimlane, CrowdStrike, SentinelOne, Microsoft Defender, AWS, Terraform, CloudFormation, Pulumi, Pandas, SQL, Elasticsearch, Google SecOps platform, Agentic AI, Large Language Models, Okta, Microsoft Entra ID, SailPoint, Proofpoint, Mimecast, Git, GitLab, Bitbucket, Docker, Podman, containerd, Jenkins, GitLab CI, Azure DevOps, ThreatConnect, Anomali, MISP
2w
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R&D Engineer SW Quality 3
Broomfield, Colorado, United States
$91k-$146k/yr OnsiteFull Time
8+ YOEBachelor's in engineering, 8+ years software testing experience, strong automation (Python), Linux/Windows/VMware skills, networking and SAN knowledge, JIRA and REST API experience.
Python, Linux, Windows, VMware, JIRA, REST API, Claude Code, Gemini AI
2mo
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Principal Solutions Engineer
Westminster or Saint Paul or United States
$143k-$202k/yr HybridFull Time
10+ YOE10+ years in civil construction or infrastructure technology, experience with CDE platforms (Trimble Connect/Autodesk Construction Cloud), API integration and solution design, strong stakeholder influence and communication, technical degree background preferred.
Trimble Connect, Trimble Unity, Autodesk Construction Cloud, Autodesk, Bentley, ESRI, IFC
3mo
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Principal Integration and Test Engineer
Boulder, Colorado, United States
$160k-$180k/yr OnsiteFull Time
3+ YOEDesign, develop, and execute CI/CD tests; verify system functionality; collaborate in Agile team; DoD Secret clearance.
Jira, Confluence, GitLab CI/CD, Docker, APIs
1w
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Solutions Engineer
Denver or Dallas or Boulder or Little Rock or Colorado Springs
$209k-$275k/yr RemoteFull Time
5+ YOE5+ years in service provider networks with optical/transport and routing expertise; knowledge of Cisco platforms, networking protocols, automation, and strong communication skills.
NCS1k, NCS2k, IOS XR, BGP, EVPN, OSPF, IS-IS, MPLS-LDP, SR-MPLS, SRv6, AWS, GCP, Azure, Terraform, Splunk, APIs
2w
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Associate Principal Software Engineer
Louisville or Covington
$159k-$254k/yr OnsiteFull Time
10+ YOE10+ years embedded/medical device software experience, BS/MS in related discipline, strong software architecture, cybersecurity, systems thinking, and cross-functional influence skills.
C, C++, RTOS, embedded Linux, Bluetooth, BLE, Wi-Fi, Ethernet, APIs, CI/CD, static analysis, simulator, hardware-in-the-loop, software-in-the-loop, IEC 62304
2mo
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Integration Product Manager & Developer Advocate
Westminster or Lake Oswego
$145k-$199k/yr OnsiteFull Time
7+ YOE7+ years in product management, DevRel, software engineering, or technical program management; proficiency with SQL, REST APIs, and SDLC; domain expertise in construction financial workflows; hands-on Trimble Vista/Spectrum experience; strong communication.
SQL, REST APIs, Trimble Vista, Trimble Spectrum, Procore
4w
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Practice Customer Engineer, Applied AI, Google Public Sector
Reston or Boulder or Sunnyvale or Washington D.C.
$152k-$222k/yr OnsiteFull Time
10+ YOEBachelor's or equivalent,10+ years designing cloud-native architectures, Conversational AI and STT/TTS experience, EMR/ML APIs familiarity, ability to obtain Secret clearance, strong communication and presentation skills.
Google Cloud, Conversational AI, Speech-to-Text, Text-to-Speech, STT/TTS, ML APIs, Java, C++, Python, vibe coding, Large language models (LLMs), retrieval-augmented generation (RAG), agent tooling, eval frameworks, CRM, telephony platforms, modern AI frameworks
3w
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Senior Spacecraft Systems Engineer – Software
Westminster, Colorado, United States
$134k-$161k/yr OnsiteFull Time
5+ YOEBachelor's degree in engineering, 5+ years systems/software/embedded experience, experience decomposing requirements and creating verification plans, embedded systems and interface experience.
Python, C++, C, Java, Bash, Git, IDEs, debuggers, CI/CD platforms, Linux, Windows, Unix, TCP/IP, UDP, Serial, USB, Ethernet, APIs, requirements tools, issue tracking systems, automated test tools
1mo
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MuleSoft Architect
Charleston or Las Vegas or Orlando or Annapolis or Portland or Boston or Huntsville or Dayton or Atlanta or Colorado Springs or Jericho or Dover or Albuquerque or Frankfort or Denver or New York City or Groton or Salt Lake City or Fort Leavenworth or Jersey City or Omaha or Bismarck or Sacramento or New Orleans or Indianapolis or Helena or Des Moines or Jackson or Hanover or Austin or Boise or Chattanooga or Tucson or Fayetteville or Chicago or St. Louis or Lansing or Pittsburgh or Philadelphia or Augusta or Oklahoma City or Brooklyn Park or Pringle or McLean or Newport or Cheyenne or Martinsburg or Cleveland or Little Rock or Madison or Albany or Seattle or Washington
$99k-$225k/yr OnsiteFull Time
7+ YOE7+ years in data integration or API development, MuleSoft and Salesforce integration experience, familiarity with API-led architecture and integration governance, experience using AI tools for MuleSoft, ability to obtain Public Trust; HS diploma/GED required; Bachelor's preferred.
MuleSoft, Salesforce, Pega, Appian