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291 api engineer jobs at 171 companies in Loveland, CO

1w
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API Developer
Pittsburgh or Cleveland or Dallas or Birmingham or Phoenix or Denver
OnsiteFull Time
CGI
CGINYSE: GIB: Provides information technology and business consulting services.
8+ YOE8+ years Java/J2EE experience building RESTful APIs using Spring Boot and microservices; experience with DevOps, Kafka, IBM MQ, SQL/NoSQL and cloud platforms required.
Java, J2EE, Spring Boot, Microservices, REST API, Angular, XML, JSON, Swagger, Jenkins, uDeploy, GIT, Kafka, IBM MQ, SQL, No Sql, AWS, Azure, GitHub, CI/CD, React, JavaScript, HTML, CSS, JSON Web Token (JWT), UML, XPath
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2d
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API Engineer
Boulder, Colorado, United States
$80k-$110k/yr RemoteFull Time
Lynker
Lynker: Science and technology solutions for government and environmental agencies.
1+ YOEMaster's in CS or related preferred, or Bachelor's plus 1–2 years building APIs/services; proficiency with REST/JSON, schema/versioning, Git, Linux, testing, and a modern language (Python preferred).
OpenAPI, JSON Schema, GeoJSON, GeoParquet, Docker, Terraform, CloudFormation, GitHub Actions, Git, Linux, Python, R, Shiny, Rust
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1mo
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Senior Platform Engineer, AI
Denver or Long Beach
$170k-$275k/yr HybridFull Time
True Anomaly
True Anomaly: Develops autonomous spacecraft and software for space security missions.
5+ YOE5+ years software/cloud/DevOps experience; production development in Python/TypeScript/Java; experience with LLM APIs, prompt engineering, RAG, agent frameworks, API integrations; ability to obtain Top-Secret clearance and U.S. citizenship or equivalent status.
Python, TypeScript, Java, CrewAI, Pydantic AI, API, webhooks, MCP, Retrieval-Augmented Generation (RAG), AWS, Azure, GCP, AWS GovCloud, Azure Government, FedRAMP, NIST 800-53, IL4, IL5
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1mo
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Senior Software Engineer – API & Cloud Integrations (Java, AWS)
Denver or Cedar Rapids or Philadelphia
$94k-$120k/yr HybridFull Time
Transamerica
TransamericaNYSE: AEG: Provides insurance, retirement solutions, and investment products to customers.
3+ YOEBachelor’s or equivalent experience; 3+ years Core Java; experience with Spring, microservices, APIs, databases (RDBMS/NoSQL), cloud (AWS/Azure), CI/CD, and integration frameworks; strong analytical and communication skills.
Java, Core Java, Spring Framework, Spring Boot, Spring MVC, J2EE, Entity Framework, IIS, Swagger, Swagger API, OData, .NET API 2, .NET API Core, AutoMapper, MS Cosmos DB, Microsoft Cosmos DB, Apache Cassandra, Amazon DynamoDB, AWS, Azure, EC2, ECS, S3, Kinesis, Microsoft VMs, Microsoft Blob, Microsoft Data Factory, Microsoft SQL Data Warehouse, Microsoft ARM Templates, Microsoft Event Hubs, Visual Studio, Git, Bitbucket, Maven, Jenkins, Nexus, SQL Management Studio, NUnit, Ajax, MS HPC, SageMaker, Spark, API Gateways, Apache Camel, Zookeeper, Kafka, Docker, OpenShift, Kubernetes, Angular, React, Vue.js, ASP.NET MVC, HTML, JS, CSS
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1mo
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Senior Product Systems Engineer
Golden or San Francisco or Toulouse
$160k-$210k/yr OnsiteFull Time
Loft Orbital
Loft Orbital: Deploy and operate satellite missions for organizations and governments.
Strong systems engineering background across software and hardware; experience defining architecture, interfaces, and requirements; expertise with distributed systems and APIs; strong communication and documentation skills.
CONOPS, ICDs, OBSW, APIs
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1mo
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Senior Facilities Engineer
Denver or Williston
$185k-$230k/yr OnsiteFull Time
Koda Resources
Koda Resources: Acquires and develops oil and natural gas properties.
10+ YOEBachelor's in engineering, 10+ years facilities engineering in oil & gas, experience leading capital projects, proficiency with AFT, HYSYS, Piper, Pipesim, AutoCAD, valid driver's license, familiarity with API/ASME/NFPA and PHA/MOC.
AFT, HYSYS, Piper, Pipesim, AutoCAD
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3w
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Forward Deployed Engineer
New York City or Denver
$204k-$240k/yr OnsiteFull Time
Legora: AI workspace for legal document research and drafting.
Experienced generalist engineer with backend, APIs, auth (SAML/OIDC), and integration experience; customer-facing technical delivery skills and strong communication.
SAML, OIDC, REST, iManage, NetDocuments, Microsoft SharePoint
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1mo
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Pipe Stress Engineer (41488)
Tempe or San Francisco or Seattle or Portland or Denver or Holladay or Austin or United States or Canada
$70k-$96k/yr RemoteFull Time
Jacobs
JacobsNYSE: J: Global provider of professional engineering and technical services.
2+ YOEBachelor's in Mechanical Engineering, ≥2 years engineering experience, knowledge of pipe stress analysis and support design, familiarity with ASME/ANSI/API, strong communication and analytical skills.
AutoPIPE, Caesar II, Navisworks, AutoCAD
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2mo
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Agentic AI Software Engineer
King of Prussia or Aurora
$82k-$172k/yr OnsiteFull Time
CACI
CACINYSE: CACI: Provides information technology and professional services to government clients.
5+ YOE5+ years software engineering with Python; BS in CS or related field; TS/SCI clearance with CI polygraph; experience building microservices and REST APIs.
Python, Git, GitLab, GitHub, Jira, Confluence, RESTful APIs, Microservices, CI/CD
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2w
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R&D Engineer SW Quality 3
Broomfield, Colorado, United States
$91k-$146k/yr OnsiteFull Time
Broadcom
BroadcomNASDAQ: AVGO: Designs and sells semiconductors and infrastructure software to enterprises.
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
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1mo
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Sr Automation Engineer – New Glenn
Seattle or Denver or Los Angeles or Florida
$182k-$277k/yr OnsiteFull Time
Blue Origin: Develops reusable rockets and systems for human spaceflight.
8+ YOEBachelor's in engineering/computer science or equivalent, 8+ years software/automation/data/engineering experience, experience designing automation tools, familiarity with React, TypeScript, Kubernetes, Databricks, SQL, Python, REST APIs, and AWS.
React, TypeScript, Kubernetes, Databricks, SQL, Python, REST APIs, AWS, Git, SVN, Gitlab CI
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3w
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Quality Assurance Engineer
Denver, Colorado, United States
$110k-$125k/yr RemoteFull Time
Trilon Group
Trilon Group: Providing engineering and design services for community infrastructure.
4+ YOE4+ years QA experience, strong test automation skills for API/backend/UI, proficiency in Python or JavaScript, CI/CD and REST testing, experience evaluating AI/LLM outputs and RAG pipelines, strong communication and analytical skills.
Python, JavaScript, CI/CD, API, REST, LLM, Retrieval-Augmented Generation (RAG)
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2w
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Network Automation Engineer II
Dublin or Fremont or Denver
$73k-$115k/yr OnsiteFull Time
Astreya
Astreya: Provides managed IT services and digital workplace solutions for enterprises.
3+ YOE3+ years in automation/data engineering or DevOps, strong Python, API and SQL experience, ETL and orchestration knowledge, data quality and large-dataset handling, independent problem solving.
Python, PHP, Hack, Bash, GraphQL, REST, Thrift, SQL, Hive/Presto, Airflow, cron
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4d
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Controls Engineer II
Fort Collins or Cambridge
OnsiteFull Time
Generac
GeneracNYSE: GNRC: Manufactures backup power generators and energy technology solutions.
2+ YOEBachelor of Science in Engineering, 2+ years power generation and PLC/industrial controls experience, ability to travel internationally, valid driver’s license and passport, lift 50 lbs, strong troubleshooting and communication skills.
Modbus, DNP3, CAN 2.0A/B, J1939 CANbus, IEC 61131, Python, REST API, Codesys, ClearSCADA, PLC
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2mo
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3D CAD Automation Engineer
Golden or Shawnee or Vernon Hills or Fort Lauderdale or Trussville
$80k-$100k/yr RemoteFull Time
Parkson
Parkson: Provides equipment and solutions for water and wastewater treatment.
Experience automating Autodesk Inventor using Inventor API/iLogic; proficiency with VBA/VB.NET or C#; strong parametric modeling and drawings; bachelor’s in engineering or related field or equivalent
Autodesk Inventor API, iLogic, VBA, VB.NET, C#
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2w
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Lead Systems Engineer (data)
Atlanta or Denver or Chicago or Washington
RemoteFull Time
Bravo17
Bravo17: A federal digital services firm that helps agencies improve digital products and services through strategy, design, and engineering.
7+ YOE7+ years in data engineering or analysis with AI/ML and cloud experience, strong data architecture and leadership skills, ability to communicate with federal stakeholders and obtain Secret clearance.
REST API, microservices, AI, machine learning, cloud computing, data warehouse
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1mo
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Gen AI Infrastructure Engineer
Woodbridge or New York City or Atlanta or Boston or Chicago or Dallas or Delaware or Denver or Garden City or Cayman Islands or Greenwich or Houston or Los Angeles or Miami or Naples or Nevada or Palm Beach or San Diego or San Francisco or Seattle or Stuart or Washington
$160k-$200k/yr HybridFull Time
Bessemer Trust
Bessemer Trust: Wealth management and family office services for affluent clients.
7+ YOE7+ years in DevOps/platform/cloud infrastructure engineering; strong AWS (IAM, CloudFormation, Lambda, API Gateway, VPC, CloudWatch, SSM, Secrets Manager, ECR); AWS CDK/CloudFormation/Terraform; CI/CD (Bitbucket/GitHub Actions, OIDC); container and datastore operations; security fundamentals.
AWS Bedrock, AgentCore, Lambda, API Gateway, AWS CDK, CloudFormation, Terraform, Bitbucket Pipelines, GitHub Actions, OIDC, IAM, VPC, CloudWatch, SSM, Secrets Manager, ECR, Neo4j, Neptune, Redis, Milvus, VectorDB
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6d
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Staff Engineer, Revenue Cycle
Denver or Dallas or Salt Lake City or Atlanta or Miami or Seattle or Boston or Portland or Austin or Durham or Tampa or Scottsdale
$165k-$180k/yr RemoteFull Time
SonderMind
SonderMind: Mental health platform connecting patients with licensed professionals.
8+ YOE8+ years building web services or full-stack applications; strong hands-on experience with Ruby/Rails, TypeScript/Node, Python, APIs, PostgreSQL, and MongoDB; mentoring and technical leadership experience; familiarity with LLM/AI toolchains preferred.
Ruby/Rails, TypeScript/Node, Python, MongoDB, PostgreSQL, RESTful, gRPC, Gemini, ChatGPT, Claude, GitHub Copilot, Langchain, Langgraph, LLMs
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2mo
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Principal Engineer, Mission Software
Arvada or Los Angeles or San Francisco or Seattle or Washington
HybridFull Time
Quindar
Quindar: Cloud-native software for automated satellite mission operations.
8+ YOE3+ MgmtLead complex software and systems engineering in aerospace/defense; architecture focus; leadership; government programs; security clearance readiness.
Programming, Software Architecture, Distributed Systems, APIs, Operator tooling, Mission-critical applications
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2mo
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Engineer I - Systems - Digital Ecosystem
Broomfield, Colorado, United States
$65k-$110k/yr HybridFull Time
BAE Systems
BAE SystemsLondon Stock Exchange: BA: Provides advanced defense, aerospace, and security technology solutions.
BS in engineering or related field required, entry-level; must be a U.S. person and able to obtain Top Secret/SCI; interest/experience in MBSE, SysML/UML, AI, scripting (Python/Java/JavaScript), data integration, and strong communication skills.
MBSE, SysML, UML, Python, Java, JavaScript, APIs
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