22 sr api developer jobs at 17 companies in Fort Collins, 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
2w
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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
3w
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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
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
2w
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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
1mo
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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
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
4d
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Software Engineering Manager
Lafayette, Colorado, United States
$150k-$226k/yr OnsiteFull Time
5+ YOEBachelor's degree and 5 years of relevant experience, or advanced degree and 3 years. Requires software engineering process and project leadership; regulated software, testing, AI tools, APIs, DevOps, and SRE experience preferred.
GitHub Copilot, Claude, OpenAI, large language models, APIs, SDKs, DevOps, IEC 62304
4d
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Software Engineering Manager
Lafayette, Colorado, United States
$150k-$226k/yr OnsiteFull Time
5+ YOEBachelor's degree and 5 years of relevant experience or advanced degree and 3 years required. Requires software engineering leadership, regulated-environment experience, and expertise in testing, quality, and AI-assisted development.
GitHub Copilot, Claude, OpenAI, large language models, APIs, SDKs, DevOps, site reliability engineering, IEC 62304
2mo
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D365 F&O Technical Solution Architect
Denver or Los Angeles or Washington or Troy or New York or Houston or Chicago or Grand Rapids or Owings Mills or Richmond or Raleigh or Boston or San Jose or San Francisco or Austin or Kalamazoo or Spokane or Fort Worth or Atlanta or Orlando or Dallas or Wilmington or Phoenix or San Antonio or Milwaukee or Madison or McLean or Woodbridge or Stamford or Miami or Philadelphia or Charlotte or West Palm Beach or Costa Mesa or St. Louis or Fort Lauderdale or Seattle or Rosemont or Pittsburgh or Tulsa or Cincinnati or Cleveland or Columbus or Akron or Cherry Hill or Tampa or Minneapolis or Anchorage or Salt Lake City or Jacksonville or Boulder or Nashville or Oak Brook or Las Vegas or Indianapolis or San Diego
$158k-$197k/yr OnsiteFull Time
6+ YOE6+ years technical D365 experience leading projects and teams; proficiency with X++, .NET/C#, SSRS, RESTful APIs, SQL, JSON, ADO/Visual Studio/LCS and D365 F&O implementation technologies; strong analytical and communication skills.
X++, .NET/C#, SSRS, RESTful API Web Services, SQL, JSON, ADO, Visual Studio, LCS, ADO Pipelines, Build Runs (Software Deployable Packages), D365 F&O, Microsoft Dynamics 365, Microsoft Dynamics Finance & Operations, Microsoft Dynamics Business Central, Business Central, Sales Cloud, Service Cloud, Marketing Cloud, Microsoft Finance and Supply Chain Management, Dynamics 365 CRM
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