Lead Developer - Full Stack

Frontier Airlines • Denver, CO

7h • $123,462 - $163,873 • Hybrid

About The Position

At Frontier, our mission is to Make Every Flight Count. That mission guides how we support our customers, our people and the operation every day. As 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. Our 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.

Frontier Airlines is currently reviewing qualified candidates for a full-time Full Stack .NET Lead Developer. The ideal candidate has 10+ years of web development experience in the Microsoft .NET technology stack, deep Microsoft Azure experience, expert CI/CD skills, and strong experience with React, React Native, and Next.js. Working knowledge of AWS is also required. You need solid back-end programming and API design experience together with modern, responsive web and mobile front-end experience. For the right candidate, Frontier Airlines’ 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 a modern cloud-first architecture where you will lead one or more areas of development and be a key player.

Requirements

• Bachelor’s degree from a four-year college or university; or equivalent combination of education and experience
• 6+ years of experience with modern front-end technologies, including React, Next.js, React Native, TypeScript, JavaScript, HTML5, CSS3/Sass, and responsive design
• 12+ years of experience within the Microsoft technology stack, including hands-on expertise with C#, .NET/.NET Core, ASP.NET Core, Web API, and Entity Framework Core
• Experience as a solution architect or technical lead, including application and cloud architecture, technology stack decisions, and proofs of concept reviewed by architects and leadership
• Expertise with React architecture and state management libraries such as Redux and Jotai, plus Next.js rendering, routing, and data-fetching patterns
• 5+ years of cloud experience, primarily with Microsoft Azure, plus working knowledge of AWS services and deployment patterns
• Experience translating designs and work-item requirements into polished, responsive web and mobile experiences using React, Next.js, React Native, TypeScript, HTML, and CSS
• Experience with design, development, testing, and deployment of software systems or applications
• Experience designing and developing REST, SOAP, and GraphQL services and applying OpenAPI, OAuth 2.0, OpenID Connect, and SSO standards
• Expert C#/.NET and strong JavaScript/TypeScript experience are required
• Experience with modern development tools including Visual Studio, Visual Studio Code, .NET CLI, Node.js, NPM, and modern front-end build tooling
• Ability to understand and handwrite CSS responsive files including media queries
• Debugging & optimizing code to enable maximum performance across devices and browsers
• Experience developing database-driven applications with SQL Server, ADO.NET, Entity Framework Core, and micro-ORMs such as Dapper
• Expertise in TDD, unit and integration testing, and CI/CD using Azure DevOps Pipelines and/or GitHub Actions, including automated quality and security checks, artifact promotion, and controlled deployments
• Expert working knowledge of object-oriented design/programming, n-tier and distributed applications, C#, .NET, ASP.NET Core, REST APIs, XML/JSON, and relational databases
• Strong object-oriented design skills
• Knowledge of the software development life cycle, DevOps, trunk-based development, and modern release practices
• Detail oriented with a meticulous focus on producing the highest quality results
• Ability to work effectively and lead in a fast-moving, multi-project team environment
• Work effectively in an Agile development process
• Clear and effective written and verbal communication as well as strong interpersonal skills
• Excellent problem-solving skills
• Ability to develop code for testability
• Capable of learning new technologies and platforms quickly and presenting solutions to the leadership team
• Ability to work individually and in a team environment
• Self-motivated and able to handle responsibilities without consistent oversight
• Knowledge of applicable data privacy and security practices and laws, PCI, and/or SOX a plus

Responsibilities

• Work within an agile team to develop, test, and maintain consumer-facing web, mobile, and API applications built with C#, .NET, ASP.NET Core, Web API, React, React Native, Next.js, SQL Server, and Microsoft Azure
• Participate 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
• Participate and lead peer reviews of solution designs and code
• Provide technical expertise and leadership across the full stack, with primary focus on .NET, Azure, React, React Native, and Next.js
• Define and uphold application and cloud architecture standards, risk management controls, and security policies
• Develop technical documents to accurately represent application design and code
• Work closely with QA to triage and fix bugs
• Participate in the evolution of best practices, standards, and policies as it relates to software development
• Write code that is simple, maintainable, reusable, and conforms to team coding style and standards
• Accurately maintain code in source control (Azure DevOps Git), appropriately documenting pull requests, reviews, merges, and releases
• Test deliverables against a user story’s acceptance criteria including the use of multiple browsers for desktop and mobile environments
• Assist, mentor, lead, and guide senior, mid-level, and junior team members
• Own and continuously improve CI/CD pipelines, automated builds, tests, security checks, deployments, and release processes across environments

Benefits

• Medical, dental and vision coverage
• 401(k) retirement savings options
• Paid holidays, vacation time and sick time
• Travel privileges on Frontier Airlines and participating partner airlines, based on current program rules and availability
• Buddy passes, based on eligibility and program rules
• Travel-related discounts and employee discounts on select products, services and vendors
• A hybrid schedule for eligible headquarters roles based in Denver, Colorado
• Business casual dress options for eligible corporate and support roles
• Employee support programs and resources, including the HOPE League, Frontier Airlines’ nonprofit organization

What This Job Offers

• Job Type: Full-time
• Career Level: Senior
• Education Level: Associate degree