403 api engineer jobs at 213 companies in Boulder, CO
🚀PromotedHiringCafe
Founding Backend / Infra Engineer
Cupertino, CA, US
$160k-$300k/yrOn-SiteFull Time
HiringCafe: Building a 100× better job search engine to take on Indeed and LinkedIn.
Own the crawlers, pipelines, and infrastructure powering a real-time job search engine. Strong Node.js and Python fundamentals; bonus points for security and reverse-engineering chops.
Colorado Access: Provides managed care and health insurance for Medicaid members.
4+ YOEBachelor's in CS or related required; 4+ years backend experience (Python, Node.js, Java, or .NET); HL7 FHIR and X12 EDI experience; strong REST API, security (OAuth2, JWT, mTLS), SQL, and HIPAA knowledge; experience with cloud and CI/CD.
Python, Flask, FastAPI, Django, Node.js, Java, .NET, OpenAPI/Swagger, Postman, X12 EDI, HL7 FHIR, HL7 v2, CDA, EHRs, Docker, Kubernetes, GitHub Actions, Azure DevOps, Jenkins, ELK, Datadog, Prometheus, Grafana, AWS, Azure, GCP, SQL Server, Snowflake, Data Vault 2.0, pytest, JUnit, Pact, k6, Locust, OAuth2, JWT, mTLS, RBAC/ABAC, Microsoft Word, Microsoft Excel, Microsoft PowerPoint, Microsoft Outlook, Microsoft SharePoint
Hopkins or Atlanta or Chicago or Charlotte or Englewood or Brookfield or Irving
$120k-$141k/yrHybridFull Time
U.S. BankNYSE: USB: Provider of personal, business, and institutional financial services.
5+ YOEBachelor's degree or equivalent and 5+ years relevant experience. Experience with mainframe/Hogan development (COBOL, JCL, CICS), APIs, system design, testing, security, and cross-team collaboration; Scrum familiarity.
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.
Senior Software Engineer – API & Cloud Integrations (Java, AWS)
Denver or Cedar Rapids or Philadelphia
$94k-$120k/yrHybridFull Time
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
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.
Tetra TechNASDAQ: TTEK: Global provider of high-end consulting and engineering services.
3+ YOEBS engineering, FE required, willingness to attain PE, 3+ years experience, valid driver's license, knowledge of ASME/API/CFR195, and experience with pipeline/facility hydraulic modeling.
QuantumNASDAQ: QMCO: Provides data storage and management solutions for unstructured data.
5+ YOE5+ years experience applying automation, data engineering, or AI/ML to operations; production deployment experience; integration with ERP and enterprise systems; strong Python, API, and data pipeline skills; supply chain/manufacturing domain knowledge.
Python, APIs, data pipelines, automation tools, ERP, AI/ML
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.
CACINYSE: CACI: Provides information technology and professional services to government clients.
5+ YOEU.S. citizen with bachelor\u0002s degree in STEM and 5+ years software engineering experience; ability to obtain DoD clearance; experience with distributed systems, APIs, CI/CD, and AI-assisted development tools.
Lisle or St. Louis or Charlotte or Indianapolis or Greenwood Village
HybridFull Time
Farnsworth Group: A national architectural, engineering, and surveying firm providing multidisciplinary project services and client-focused solutions.
5+ YOEBS in engineering (ABET), 5-15 years oil/gas engineering experience, 3+ years project management, knowledge of DOT/API/ANSI/ASME standards, Microsoft Word/Excel/PowerPoint/Project proficiency, valid driver’s license, willing to travel.
Microsoft Word, Microsoft Excel, Microsoft PowerPoint, Microsoft Project
Tempe or San Francisco or Seattle or Portland or Denver or Holladay or Austin or United States or Canada
$70k-$96k/yrRemoteFull Time
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.
Principal Systems Engineer (TS/SCI with CI Polygraph)
Aurora, Colorado, United States
$225k-$300k/yrOnsiteFull Time
DeNOVO Solutions: Provides defense and intelligence technology, software engineering, and cybersecurity services.
15+ YOE15–20 years' related experience; TS/SCI with CI Poly; BS in engineering or related field; MBSE/SysML; API design; cloud/hybrid integration; governance; security/compliance.
MBSE/SysML, JIRA, Confluence, System modeling, API design, Configuration management, Enterprise architecture frameworks, Cloud/hybrid integration
Xcel EnergyNASDAQ: XEL: Provides electricity and natural gas services to multi-state customers.
0+ YOEABET-accredited Bachelor's in Engineering required; 0–5+ years experience depending on level; EIT/FE preferred/required; PE may be required; familiarity with API RP 1173.
CableLabs: Research and development for the broadband and cable industry.
5+ YOE5+ years of professional software development; proficient in Python; strong SQL and relational DB design; Git and CI/CD; REST APIs; testing with pytest; good communication.
GEI Consultants: Provides multi-disciplinary engineering and environmental consulting services.
4+ YOEDevelop AI solutions using pretrained models and Copilot; deploy, integrate AI into workflows; Azure and Python skills; 4+ years software engineering; GenAI LLMs knowledge.
Python, PySpark, SQL, Azure AI Platform, Databricks, TensorFlow, PyTorch, Power BI, Copilot Studio, Azure Functions, API connections
BPLondon Stock Exchange: BP: BP explores, refines, and distributes global energy products.
10+ YOEBachelor's in Mechanical/Chemical Engineering, 10+ years in natural gas processing or related field, ASME/API experience, PFD/P&ID proficiency, root-cause analysis, PE preferred.
The Woodlands or Peachtree Corners or Savannah or Tampa or Englewood
OnsiteFull Time
Pond & Company: Architecture, engineering, and construction management for infrastructure projects.
10+ YOEBachelor's in Electrical Engineering or Technology, PE license (or in progress), 10+ years electrical experience, knowledge of IEEE/API/NFPA, experience with fueling/oil & gas/energy projects, AutoCAD/ETAP/SKM proficiency, client interfacing and mentorship experience.