{"schemaVersion":"jobsearcher.job.v1","id":"088879e5899abc96fa34313f","url":"https://jobsearcher.com/jobs/088879e5899abc96fa34313f","canonicalUrl":"https://jobsearcher.com/jobs/088879e5899abc96fa34313f","title":"Lead Developer - Middleware Software","description":"Working at Frontier Airlines\n\nAt Frontier, our mission is to Make Every Flight Count. That mission guides how we support our customers, our people, and the operation every day.\n\nAs a Frontier employee, your work connects to more than a single role. Whether you’re supporting flights, helping customers, maintaining aircraft, leading teams or working behind the scenes, you help create a travel experience that is safe, reliable and built around value.\n\nOur work is guided by our core values: customer first, safety always, operational excellence and one team. These values shape how we make decisions, support each other and deliver for the people who count on us.\n\nSupport for work, life and travel\n\nFrontier offers benefits, programs and travel privileges designed to support eligible employees at work and beyond. Availability may vary by role, employment status, eligibility, location, schedule, applicable policies and current plan details.\n\nDepending on role and eligibility, available benefits and programs may include:\n\nMedical, dental and vision coverage\n401(k) retirement savings options\nPaid holidays, vacation time and sick time\nTravel privileges on Frontier Airlines and participating partner airlines, based on current program rules and availability\nBuddy passes, based on eligibility and program rules\nTravel-related discounts and employee discounts on select products, services and vendors\nA hybrid schedule for eligible headquarters roles based in Denver, Colorado\nBusiness casual dress options for eligible corporate and support roles\nEmployee support programs and resources, including the HOPE League, Frontier Airlines’ nonprofit organization\n\nAbout Frontier Airlines\n\nFrontier Airlines is a Denver-based airline serving destinations across the United States and select international markets. Our people support every part of the travel journey, from airport operations and flight crews to aircraft maintenance, customer support, corporate teams and more.\n\nWe’re focused on delivering meaningful value by making travel more accessible, practical and easy to personalize for our customers. Across the airline, our teams help support a safe, reliable and efficient operation while continuing to strengthen the experience for the people who choose Frontier.\n\nWhat Will You Be Doing?\n\nThe Lead Middleware Software Developer must have extensive working knowledge in software development and of software engineering practices. In addition, must have experience collaborating with architects, project managers, and product owners to help deliver high-quality software features that exceed the expectations of our customers. Also, must be equally capable of working independently in a fast-paced environment. This developer will lead projects and have a large range of control over application design, technology stack decisions, and development.\n\nFrontier Airlines is currently reviewing qualified candidates for a full-time Lead C# Middleware Software Developer. The ideal candidate is someone with 12+ years of development experience in Microsoft .NET technologies and 6+ years of experience leading and architecting enterprise-level backend solutions. For the right candidate, Frontier Airline’s development environment provides a unique opportunity to be part of a team rebuilding the entire commercial software system (Website, Mobile App, Middleware). It will be designed and implemented in an ultra-modern cloud-first architecture where you will take the lead in one or more areas of development and be a key player.\n\nEssential Functions\n\nWork within an agile team to develop, test, and maintain enterprise-level microservice APIs built on Microsoft technologies (C#, .NET Core, Web API, SQL Server, CosmosDB)\nParticipate in bi-weekly sprint planning sessions, helping to provide sub-tasks and estimates for user stories for the work to be done in the upcoming sprint\nParticipate and lead peer reviews of solution designs and code\nProvide expertise and leadership across the full stack of technologies\nAdhere to and set architecture standards, risk management, and security policies\nDevelop technical documents to accurately represent application design and code\nWork closely with QA to triage and fix bugs\nParticipate in the evolution of best practices, standards, and policies as it relates to software development\nWrite code that is simple, maintainable, reusable, and conforms to team coding style and standards\nAccurately maintain code in source control system (Microsoft DevOps GIT), appropriately documenting and commenting check-in and merge activities\nTest deliverables against a user story’s acceptance criteria including the use of multiple browsers for desktop and mobile environments\nAssist, mentor, lead, and guide senior, mid-level, and junior team members\nEnsure continuous integration and builds are in working order\n\nQualifications\n\nBachelor’s degree from a four-year college or university; or equivalent combination of education and experience\n12+ years of experience within the Microsoft technology stack, including hands-on experience using C#, .NET framework, and .NET Core\nExperience as a Solution Architect leading development efforts, including technology stack decisions and putting together proof of concepts to be reviewed by other solution architects and the leadership team\nExperience with design, development, testing, and deployment of software systems or applications\nMicroservice design and implementation experience in an enterprise-level application is required\nHands-on experience with container technologies like Docker and K8s\nExperience developing and working with web services (REST/SOAP/GraphQL) and knowledge of industry standards such as OpenAPI, OAuth, SSO, etc.\nExperience with JavaScript/TypeScript\nExperience developing database-driven web applications with Microsoft tools and technologies including ADO.NET, Entity Framework, and micro ORMs\n5+ years’ experience with cloud technologies Azure/AWS\nExpert knowledge of API Management solutions\nExperience with test-driven development (TDD), unit testing, and continuous deployment principles in an Agile environment\n\nCloud-Native Engineering\n\n5+ years of experience designing and deploying cloud-native solutions within Azure and/or AWS.\nHands-on experience with Infrastructure as Code (Terraform, Bicep, CloudFormation).\nExperience with container orchestration platforms such as Kubernetes (AKS/EKS) and cloud-native application patterns.\nExperience implementing serverless architectures utilizing Azure Functions, AWS Lambda, Event Grid, Service Bus, EventBridge, SQS, SNS, Kafka, or equivalent technologies.\nExperience implementing observability solutions including Azure Monitor, Application Insights, Datadog, Splunk, OpenTelemetry, Grafana, or similar platforms.\n\nKnowledge, Skills and Abilities\n\nExpert working knowledge of object-oriented design/programming, n-tier web applications, XML\\JSON, ASP.NET, and relational databases\nStrong object-oriented design skills\nKnowledge of the Software Development Life Cycle\nDetail-oriented with a meticulous focus on producing the highest quality results\nAbility to work effectively and lead in a fast-moving, multi-project team environment\nWork effectively in an Agile development process\nClear and effective written and verbal communication as well as strong interpersonal skills\nExcellent problem-solving skills\nAbility to develop code for testability\nCapable of learning new technologies and platforms quickly and presenting solutions to the leadership team\nAbility to work individually and in a team environment\nSelf-motivated and able to handle responsibilities without consistent oversight\nKnowledge of applicable data privacy and security practices and laws, PCI, and/or SOX a plus\nStrong understanding of distributed systems, event-driven architectures, and cloud-native design patterns.\nKnowledge of AI application architecture, prompt engineering, Retrieval Augmented Generation (RAG), vector databases, and enterprise AI integration patterns.\nAbility to evaluate, prototype, and recommend emerging AI technologies and cloud services.\nExperience implementing secure AI solutions that comply with enterprise governance, privacy, PCI, SOX, and security requirements.\nExpert knowledge of API Management, identity management, OAuth2, OpenID Connect, SAML, Zero Trust, and enterprise integration architectures.\nStrong understanding of DevSecOps, CI/CD automation, platform engineering, and cloud security practices.\n\nEquipment Operated\n\nStandard office equipment, including personal computers, Apple computers, various and future tablets, smartphones and wearable technology, copiers, fax machine, printer, phones, and future and upcoming technology that may not yet be publicly available\n\nWork Environment\n\nRemote office environment. This requires the employee to have adequate space and internet access to conduct their job and participate in online video meetings using various video conferencing solutions.\n\nThis position may require the occasional visit to Frontier’s headquarters for team meetings and occasional visits to airport locations for on-site testing.\n\nPhysical Effort\n\nGenerally, not required.\n\nSupervision Received\n\nGeneral Direction: The incumbent normally receives little instruction on day-to-day work and receives general instructions on new assignments.\n\nSalary Range: $123,462 - $163,873. Please note: this posting will expire on or before 12.31.2026.\n\nPositions Supervised\n\nNone\n\nWorkplace Policies\n\nDisclaimer: The above statements are intended only to describe the general nature and level of work required of the referenced position; they are not intended to be an exhaustive list of all responsibilities, duties, and skills required of individuals in this position. Please be advised that duties and expectations of this position may be subject to change.\n\nFrontier Airlines, Inc. is an equal opportunity employer and, as such, is committed to providing equal employment opportunities to all qualified applicants without regard to race, color, religion, sex, national origin, age, marital status, veteran status, sexual orientation, gender identity or expression, disability status, pregnancy, genetic information, citizenship status or any other basis protected by federal, state, or local laws. This policy applies to all terms and conditions of employment, including recruiting, hiring, placement, promotion, termination, layoff, recall, transfer, leaves of absence, compensation and training.\n\nFrontier Airlines is a Zero Tolerance Drug-Free Workplace. All prospective DOT safety-sensitive employees are subject to pre-employment testing for the following drugs and their metabolites: Marijuana, Cocaine, Amphetamines, Opioids and Phencyclidine (PCP). Further, any DOT safety-sensitive job applicant who is found to have tested positive on any required drug or alcohol test at a former employer will be considered ineligible for employment with Frontier.\n\nColorado Residents: In any materials you submit, you may redact or remove age-identifying information such as age, date of birth, or dates of school attendance or graduation. You will not be penalized for redacting or removing this information.\n\nEqual Opportunity Employer\nThis employer is required to notify all applicants of their rights pursuant to federal employment laws. For further information, please review the Know Your Rights (https://www.eeoc.gov/poster) notice from the Department of Labor.","company":"Frontierairlines","rawCompany":"frontierairlines","city":"Denver","state":"CO","isRemote":false,"isActive":false,"createdAt":"2026-10-09T11:28:07.781Z","occupations":[{"code":"15-1252.00","title":"Software Developers","slug":"software-developers"},{"code":"15-1299.08","title":"Computer Systems Engineers/Architects","slug":"computer-systems-engineers-architects"},{"code":"15-1254.00","title":"Web Developers","slug":"web-developers"}],"industries":[{"code":"541511","title":"Custom Computer Programming Services","slug":"custom-computer-programming-services"},{"code":"513210","title":"Software Publishers","slug":"software-publishers"},{"code":"541512","title":"Computer Systems Design Services","slug":"computer-systems-design-services"}],"jobPosting":{"@context":"https://schema.org","@type":"JobPosting","title":"Lead Developer - Middleware Software","description":"Working at Frontier Airlines\n\nAt Frontier, our mission is to Make Every Flight Count. That mission guides how we support our customers, our people, and the operation every day.\n\nAs a Frontier employee, your work connects to more than a single role. Whether you’re supporting flights, helping customers, maintaining aircraft, leading teams or working behind the scenes, you help create a travel experience that is safe, reliable and built around value.\n\nOur work is guided by our core values: customer first, safety always, operational excellence and one team. These values shape how we make decisions, support each other and deliver for the people who count on us.\n\nSupport for work, life and travel\n\nFrontier offers benefits, programs and travel privileges designed to support eligible employees at work and beyond. Availability may vary by role, employment status, eligibility, location, schedule, applicable policies and current plan details.\n\nDepending on role and eligibility, available benefits and programs may include:\n\nMedical, dental and vision coverage\n401(k) retirement savings options\nPaid holidays, vacation time and sick time\nTravel privileges on Frontier Airlines and participating partner airlines, based on current program rules and availability\nBuddy passes, based on eligibility and program rules\nTravel-related discounts and employee discounts on select products, services and vendors\nA hybrid schedule for eligible headquarters roles based in Denver, Colorado\nBusiness casual dress options for eligible corporate and support roles\nEmployee support programs and resources, including the HOPE League, Frontier Airlines’ nonprofit organization\n\nAbout Frontier Airlines\n\nFrontier Airlines is a Denver-based airline serving destinations across the United States and select international markets. Our people support every part of the travel journey, from airport operations and flight crews to aircraft maintenance, customer support, corporate teams and more.\n\nWe’re focused on delivering meaningful value by making travel more accessible, practical and easy to personalize for our customers. Across the airline, our teams help support a safe, reliable and efficient operation while continuing to strengthen the experience for the people who choose Frontier.\n\nWhat Will You Be Doing?\n\nThe Lead Middleware Software Developer must have extensive working knowledge in software development and of software engineering practices. In addition, must have experience collaborating with architects, project managers, and product owners to help deliver high-quality software features that exceed the expectations of our customers. Also, must be equally capable of working independently in a fast-paced environment. This developer will lead projects and have a large range of control over application design, technology stack decisions, and development.\n\nFrontier Airlines is currently reviewing qualified candidates for a full-time Lead C# Middleware Software Developer. The ideal candidate is someone with 12+ years of development experience in Microsoft .NET technologies and 6+ years of experience leading and architecting enterprise-level backend solutions. For the right candidate, Frontier Airline’s development environment provides a unique opportunity to be part of a team rebuilding the entire commercial software system (Website, Mobile App, Middleware). It will be designed and implemented in an ultra-modern cloud-first architecture where you will take the lead in one or more areas of development and be a key player.\n\nEssential Functions\n\nWork within an agile team to develop, test, and maintain enterprise-level microservice APIs built on Microsoft technologies (C#, .NET Core, Web API, SQL Server, CosmosDB)\nParticipate in bi-weekly sprint planning sessions, helping to provide sub-tasks and estimates for user stories for the work to be done in the upcoming sprint\nParticipate and lead peer reviews of solution designs and code\nProvide expertise and leadership across the full stack of technologies\nAdhere to and set architecture standards, risk management, and security policies\nDevelop technical documents to accurately represent application design and code\nWork closely with QA to triage and fix bugs\nParticipate in the evolution of best practices, standards, and policies as it relates to software development\nWrite code that is simple, maintainable, reusable, and conforms to team coding style and standards\nAccurately maintain code in source control system (Microsoft DevOps GIT), appropriately documenting and commenting check-in and merge activities\nTest deliverables against a user story’s acceptance criteria including the use of multiple browsers for desktop and mobile environments\nAssist, mentor, lead, and guide senior, mid-level, and junior team members\nEnsure continuous integration and builds are in working order\n\nQualifications\n\nBachelor’s degree from a four-year college or university; or equivalent combination of education and experience\n12+ years of experience within the Microsoft technology stack, including hands-on experience using C#, .NET framework, and .NET Core\nExperience as a Solution Architect leading development efforts, including technology stack decisions and putting together proof of concepts to be reviewed by other solution architects and the leadership team\nExperience with design, development, testing, and deployment of software systems or applications\nMicroservice design and implementation experience in an enterprise-level application is required\nHands-on experience with container technologies like Docker and K8s\nExperience developing and working with web services (REST/SOAP/GraphQL) and knowledge of industry standards such as OpenAPI, OAuth, SSO, etc.\nExperience with JavaScript/TypeScript\nExperience developing database-driven web applications with Microsoft tools and technologies including ADO.NET, Entity Framework, and micro ORMs\n5+ years’ experience with cloud technologies Azure/AWS\nExpert knowledge of API Management solutions\nExperience with test-driven development (TDD), unit testing, and continuous deployment principles in an Agile environment\n\nCloud-Native Engineering\n\n5+ years of experience designing and deploying cloud-native solutions within Azure and/or AWS.\nHands-on experience with Infrastructure as Code (Terraform, Bicep, CloudFormation).\nExperience with container orchestration platforms such as Kubernetes (AKS/EKS) and cloud-native application patterns.\nExperience implementing serverless architectures utilizing Azure Functions, AWS Lambda, Event Grid, Service Bus, EventBridge, SQS, SNS, Kafka, or equivalent technologies.\nExperience implementing observability solutions including Azure Monitor, Application Insights, Datadog, Splunk, OpenTelemetry, Grafana, or similar platforms.\n\nKnowledge, Skills and Abilities\n\nExpert working knowledge of object-oriented design/programming, n-tier web applications, XML\\JSON, ASP.NET, and relational databases\nStrong object-oriented design skills\nKnowledge of the Software Development Life Cycle\nDetail-oriented with a meticulous focus on producing the highest quality results\nAbility to work effectively and lead in a fast-moving, multi-project team environment\nWork effectively in an Agile development process\nClear and effective written and verbal communication as well as strong interpersonal skills\nExcellent problem-solving skills\nAbility to develop code for testability\nCapable of learning new technologies and platforms quickly and presenting solutions to the leadership team\nAbility to work individually and in a team environment\nSelf-motivated and able to handle responsibilities without consistent oversight\nKnowledge of applicable data privacy and security practices and laws, PCI, and/or SOX a plus\nStrong understanding of distributed systems, event-driven architectures, and cloud-native design patterns.\nKnowledge of AI application architecture, prompt engineering, Retrieval Augmented Generation (RAG), vector databases, and enterprise AI integration patterns.\nAbility to evaluate, prototype, and recommend emerging AI technologies and cloud services.\nExperience implementing secure AI solutions that comply with enterprise governance, privacy, PCI, SOX, and security requirements.\nExpert knowledge of API Management, identity management, OAuth2, OpenID Connect, SAML, Zero Trust, and enterprise integration architectures.\nStrong understanding of DevSecOps, CI/CD automation, platform engineering, and cloud security practices.\n\nEquipment Operated\n\nStandard office equipment, including personal computers, Apple computers, various and future tablets, smartphones and wearable technology, copiers, fax machine, printer, phones, and future and upcoming technology that may not yet be publicly available\n\nWork Environment\n\nRemote office environment. This requires the employee to have adequate space and internet access to conduct their job and participate in online video meetings using various video conferencing solutions.\n\nThis position may require the occasional visit to Frontier’s headquarters for team meetings and occasional visits to airport locations for on-site testing.\n\nPhysical Effort\n\nGenerally, not required.\n\nSupervision Received\n\nGeneral Direction: The incumbent normally receives little instruction on day-to-day work and receives general instructions on new assignments.\n\nSalary Range: $123,462 - $163,873. Please note: this posting will expire on or before 12.31.2026.\n\nPositions Supervised\n\nNone\n\nWorkplace Policies\n\nDisclaimer: The above statements are intended only to describe the general nature and level of work required of the referenced position; they are not intended to be an exhaustive list of all responsibilities, duties, and skills required of individuals in this position. Please be advised that duties and expectations of this position may be subject to change.\n\nFrontier Airlines, Inc. is an equal opportunity employer and, as such, is committed to providing equal employment opportunities to all qualified applicants without regard to race, color, religion, sex, national origin, age, marital status, veteran status, sexual orientation, gender identity or expression, disability status, pregnancy, genetic information, citizenship status or any other basis protected by federal, state, or local laws. This policy applies to all terms and conditions of employment, including recruiting, hiring, placement, promotion, termination, layoff, recall, transfer, leaves of absence, compensation and training.\n\nFrontier Airlines is a Zero Tolerance Drug-Free Workplace. All prospective DOT safety-sensitive employees are subject to pre-employment testing for the following drugs and their metabolites: Marijuana, Cocaine, Amphetamines, Opioids and Phencyclidine (PCP). Further, any DOT safety-sensitive job applicant who is found to have tested positive on any required drug or alcohol test at a former employer will be considered ineligible for employment with Frontier.\n\nColorado Residents: In any materials you submit, you may redact or remove age-identifying information such as age, date of birth, or dates of school attendance or graduation. You will not be penalized for redacting or removing this information.\n\nEqual Opportunity Employer\nThis employer is required to notify all applicants of their rights pursuant to federal employment laws. For further information, please review the Know Your Rights (https://www.eeoc.gov/poster) notice from the Department of Labor.","datePosted":"2026-10-09T11:28:07.781Z","dateModified":"2026-10-09T11:28:07.781Z","hiringOrganization":{"@type":"Organization","name":"Frontierairlines","sameAs":"https://jobsearcher.com"},"jobLocation":{"@type":"Place","address":{"@type":"PostalAddress","addressLocality":"Denver","addressRegion":"CO","addressCountry":"US"}},"identifier":{"@type":"PropertyValue","name":"JobSearcher","value":"088879e5899abc96fa34313f"},"url":"https://jobsearcher.com/jobs/088879e5899abc96fa34313f"}}