Lead & Senior Developers - Healthcare

Mariner

About The Position

We are seeking experienced Lead and Senior Developers to help design, build, and deliver enterprise, cloud-based applications within a complex digital environment. These roles require strong hands-on expertise in .NET/C#, API development, system integration, scalable design, and secure engineering practices. The ideal candidates will bring experience building integration-heavy solutions across multiple systems, preferably in Azure-based environments. They will be comfortable working in Agile delivery teams, contributing to technical direction, and delivering high-quality, maintainable solutions. This opportunity is open to both full-time salaried employees and independent contractors.

Requirements

Strong hands-on experience building enterprise applications in cloud-based environments, preferably Azure.
Deep expertise in .NET/C#, API development, system integration, and RESTful services.
Strong understanding of scalable architecture, microservices patterns, API-first design, and secure coding practices.
Solid understanding of software design patterns, performance optimization, and automated testing.
Experience with CI/CD pipelines using Azure DevOps, GitHub, or similar tools.
Ability to mentor developers, lead code reviews, guide technical decisions, and support development standards.
Comfortable working in Agile delivery environments.
Ability to collaborate effectively with architects, Business Analysts, developers, and delivery stakeholders.

Nice To Haves

Experience with FHIR/HL7 interoperability and exposure to React or Angular.
Working knowledge of Azure services, with Azure API Management experience.
Experience integrating with or extending Power Platform solutions, including Power Apps and Power Automate.
Familiarity with event-driven architectures, data platforms, or AI/ML integration
Experience working in regulated environments, such as healthcare or public sector.

Responsibilities

Design, build, and support enterprise applications and integration-heavy solutions in cloud-based environments
Develop and maintain backend services, APIs, and system integrations using .NET/C# and modern development frameworks.
Contribute to scalable system design, API-first development, microservices patterns, and secure application architecture.
Develop and integrate solutions involving healthcare interoperability standards such as FHIR/HL7
Work with Azure-based services, including Azure API Management, to support secure and scalable application integration.
Support CI/CD pipelines, automated testing, DevOps, and DevSecOps considerations.
Collaborate with architects, Business Analysts, delivery leads, and technical team members to support solution design, sprint delivery, estimation, and backlog refinement.
Participate in code reviews, technical design discussions, troubleshooting, and quality assurance activities.
Integrate with or extend Power Platform solutions, including Power Apps and Power Automate, where appropriate.
Mentor developers, guide code quality, support architecture alignment, and help define coding standards, as required.