.NET Full Stack Lead

Cognizant; Dover; Remote; GBP 37,000 - 69,000; Full time

Benefits offered by this job

Medical/Dental/Vision/Life Insurance

401(k) plan and contributions

Paid holidays plus Paid Time Off

Long‑term/Short‑term Disability

Paid Parental Leave

Employee Stock Purchase Plan

Stock awards/incentives

Job summary

Cognizant in the United States seeks a highly skilled .NET Full Stack Lead to guide the support, enhancement, and development of enterprise applications in a healthcare setting. You will lead technical direction while remaining hands-on with design, development, and troubleshooting across Microsoft stack and cloud-native architectures.

You will drive AI-powered solutions using Azure OpenAI, RAG, Azure AI Search, and modern API frameworks, collaborating with architects, developers, and operations

Qualifications

• Bachelor's Degree required.
• 5–10 years with .NET Framework/.NET Core, C#, Web APIs, HTML5, and CSS.
• 5–10 years with RAG (Retrieval‑Augmented Generation), Azure OpenAI (LLMs, Embeddings, GPT models), Azure Document Intelligence, and Azure AI Search.
• Hands‑on with .NET Core 3.1/5.0, Entity Framework, ADO.NET, C#/.NET, and RESTful APIs.
• Experience developing and supporting SOAP Web Services and Web APIs.
• Strong SQL Server, SQL/T‑SQL/PL‑SQL, LINQ, and relational database development.
• Experience with unit testing frameworks including NUnit, MSTest, and xUnit.
• Hands‑on with Swagger, YAML, JSON, XML/XSD, and XSLT/XPath.
• Experience using Git and SDLC best practices.
• Knowledge of NLog/Log4Net and application logging frameworks.
• Exposure to Microsoft Project and Microsoft Visio is preferred.
• Strong analytical, troubleshooting, and problem‑solving skills.
• Excellent verbal and written communication skills.

Responsibilities

• Lead end‑to‑end support and delivery of enterprise apps, APIs, and AI‑enabled solutions.
• Collaborate with stakeholders, architects, developers, infrastructure and support teams to improve reliability and performance.
• Perform root cause analysis and guide development and enhancement activities.
• Design and support cloud‑native solutions leveraging Azure OpenAI, RAG, and AI Search.
• Mentor teams and promote best practices in Agile and operations.

Education

Bachelor's Degree

Tools

ASP.NET Core

Entity Framework

C#

RESTful APIs

Azure OpenAI

Azure Document Intelligence

Azure AI Search

SOAP Web Services

WCF Web Services

SQL Server

LINQ

Git

NLog/Log4Net

Swagger

XML/XSD

XSLT/XPath

Kubernetes/OpenShift

Microsoft Project

Microsoft Visio

Job description

Job Summary

We are seeking a highly skilled .NET Full Stack Lead to lead the support, enhancement, and development of business-critical enterprise applications within a complex healthcare environment. This role requires deep expertise across the Microsoft technology stack, cloud-native architectures, APIs, and modern AI-driven solutions. The ideal candidate will provide technical leadership while remaining hands‑on in designing, developing, troubleshooting, and optimizing scalable applications that support key business operations.

The successful candidate will bring strong experience in .NET Core, C#, RESTful services, Azure technologies, SQL Server, microservices, and AI-powered solutions, along with the ability to collaborate across cross‑functional teams to ensure application stability, performance, and continuous innovation.

Please note, this role is not able to offer visa transfer or sponsorship now or in the future

About the Role

As a .NET Full Stack Lead, you will serve as a technical leader responsible for the end-to‑end support and delivery of enterprise applications, APIs, integration services, and AI-enabled solutions. You will work closely with business stakeholders, architects, developers, infrastructure teams, and support organizations to drive application reliability, performance, and modernization initiatives.

In this role, you will lead troubleshooting efforts for complex production issues, perform root cause analysis, guide development and enhancement activities, and help implement best practices across software engineering and operational support functions. You will also play a key role in designing and supporting cloud‑native solutions leveraging Azure OpenAI, Retrieval‑Augmented Generation (RAG), Azure AI Search, Azure Document Intelligence, microservices, Kubernetes/OpenShift, and modern API frameworks.

The ideal candidate combines strong full‑stack development expertise with technical leadership capabilities, a passion for solving complex problems, and the ability to mentor teams while driving high‑quality delivery in both Agile and operational support environments.

In This Role, You Will

• Utilize extensive experience with .NET technologies, including ASP.NET Core 3.5/5.0 and Entity Framework 5/6.
• Develop and support solutions using Node.js, RESTful APIs, Web APIs, .NET Core SOAPCore, and WCF Web Services.
• Implement and support Retrieval‑Augmented Generation (RAG) architectures to build chatbot solutions for summarizing and retrieving information from enterprise document repositories.
• Leverage Azure OpenAI, including LLMs, embeddings, GPT models, Azure Document Intelligence, and Azure AI Search components.
• Design and implement Role‑Based Access Control (RBAC) solutions to support secure application access.
• Work with cloud platforms, microservices architectures, and containerization technologies such as Azure Red Hat OpenShift (ARO) and Kubernetes.
• Apply strong knowledge of unit testing frameworks including NUnit, MSTest, and xUnit.
• Design, develop, and support solutions utilizing relational databases such as Microsoft SQL Server and Oracle.
• Demonstrate a thorough understanding of application architecture, including web servers, application servers, databases, proxies/reverse proxies, and APIs.
• Follow and promote Test‑Driven Development (TDD) best practices.
• Perform performance tuning, troubleshooting, and debugging of complex n‑tier applications.
• Support Single Sign‑On (SSO) integrations using PingFederate or other enterprise authentication platforms.
• Utilize modern web development technologies such as Angular, JavaScript, HTML5, Bootstrap, and CSS.
• Adhere to architecture governance standards and software engineering best practices.
• Contribute throughout all phases of the software development lifecycle for large‑scale, business‑critical applications using both Waterfall and Agile methodologies.
• Understand long‑term business objectives, technology roadmaps, and the incremental value delivered throughout implementation stages.
• Translate business requirements into scalable and effective solution architecture designs.
• Apply strong analytical, problem‑solving, and technical skills to address complex business and technology challenges.
• Communicate effectively with technical and non‑technical stakeholders through strong written and verbal communication skills.
• Collaborate across teams while demonstrating exceptional interpersonal, facilitation, negotiation, and leadership capabilities.

Work Model

We strive to provide flexibility wherever possible. Based on this role’s business requirements, this is a remote position open to qualified applicants in the United States. Regardless of your working arrangement, we are here to support a healthy work-life balance through our various wellbeing programs.

Please note, this role is not able to offer visa transfer or sponsorship now or in the future

Required Qualifications

• Bachelor's Degree required.
• 5-10 years of experience with .NET Framework/.NET Core, C#, Web APIs, HTML5, and CSS.
• 5-10 years of experience with RAG (Retrieval‑Augmented Generation), Azure OpenAI (LLMs, Embeddings, GPT models), Azure Document Intelligence, and Azure AI Search.
• Hands‑on experience with .NET Core 3.1/5.0, Entity Framework, ADO.NET, C#/.NET, and RESTful APIs.
• Experience developing and supporting SOAP Web Services and Web APIs.
• Strong experience with SQL Server, SQL/T‑SQL/PL‑SQL, LINQ, and relational database development.
• Experience with unit testing frameworks including nUnit, MSTest, and xUnit.
• Hands‑on experience with Swagger, YAML, JSON, XML/XSD, and XSLT/XPath.
• Experience using Git and software development lifecycle best practices.
• Knowledge of NLog/Log4Net and application logging frameworks.
• Exposure to Microsoft Project and Microsoft Visio is preferred.
• Strong analytical, troubleshooting, and problem‑solving skills.
• Excellent verbal and written communication skills.

Salary and Other Compensation:

Applications will be accepted until November 8 th , 2026.

The annual salary for this position is between $50,000 - $92,500 depending on the experience and other qualifications of the successful candidate.

This position is also eligible for Cognizant's discretionary annual incentive program and stock awards, based on performance and subject to the terms of Cognizant's applicable plans.

Benefits

• Medical/Dental/Vision/Life Insurance
• Paid holidays plus Paid Time Off
• 401(k) plan and contributions
• Long‑term/Short‑term Disability
• Paid Parental Leave
• Employee Stock Purchase Plan

Cognizant is an equal opportunity employer. All qualified applicants will receive consideration for employment without regard to sex, gender identity, sexual orientation, race, color, religion, national origin, disability, protected Veteran status, age, or any other characteristic protected by law.