Top Senior .NET Developer Jobs

Leads a team of software engineers delivering scalable, resilient applications for healthcare payments. Responsibilities include end-to-end product delivery, architecture and system design, technical mentorship, .NET/C# development, SQL optimization, testing, operational stability, and SDLC execution. The role also drives responsible use of AI-assisted engineering tools, automation, security, agile practices, vendor evaluations, and cross-functional roadmap planning within a financial services environment.

Leads design, development, testing, troubleshooting, and operational stability for .NET full-stack applications supporting loan servicing platforms. Builds secure APIs, web applications, and database solutions using C#, ASP.NET, JavaScript, SQL Server, and related technologies. Reviews code, drives responsible AI-assisted engineering practices, automates recurring remediation, optimizes relational databases, and evaluates vendor and architectural solutions. Requires experience with ACBS, CLS APIs, Servicing Portal capabilities, commercial lending workflows, and regulated financial-services environments.

Leads software engineering efforts within an agile team, designing, developing, testing, debugging, and operating secure, scalable applications. Builds full-stack solutions using C#/.NET, Java, React, Angular, APIs, relational and NoSQL databases, CI/CD, and cloud technologies. Guides architecture evaluations, automation, operational stability, software quality, and adoption of approved AI-assisted development tools. Coaches engineers on responsible AI use, secure coding, testing, and validation practices while contributing to technical communities and team culture.

Develop and maintain PLM and digital engineering applications using C# and .NET. Lead software design, requirements gathering, SDLC planning, coding, testing, code reviews, and technical problem-solving. Collaborate with engineers, business analysts, architects, administrators, and business representatives to deliver application solutions. Improve development quality through automated testing, peer reviews, and development standards while mentoring and guiding team members.

Build modern .NET worker services, APIs, T-SQL solutions, and web interfaces replacing legacy COBOL batch systems. Review and validate AI-generated code, implement logging and restartability patterns, support parallel validation and production cutovers, troubleshoot system differences, and improve engineering standards. The role requires production ownership, strong SQL and full-stack development skills, and collaboration with QA and legacy-system specialists.

Develop and enhance .NET applications within the Concorde framework for DEA law-enforcement missions. Responsibilities include Agile software development, legacy application support, DevSecOps practices, database-backed web development, application integration, production delivery, and work across classified and unclassified environments. The role requires extensive ASP.NET, C#, MVC, .NET Core, JavaScript, SQL, XML, and relational database experience, along with an active Secret clearance and U.S. citizenship.

Develop and enhance .NET applications supporting DEA agents and law enforcement users. Responsibilities include Agile development, legacy application support, DevSecOps, classified and unclassified environment development, software packaging, production delivery, and technical demonstrations. The role requires extensive ASP.NET, C#, MVC, .NET Core, database, JavaScript, and XML experience, plus an active Secret clearance and U.S. citizenship.

Develop and maintain .NET applications, APIs, web services, integrations, automation scripts, and database-driven solutions. Build secure data exchange workflows across enterprise systems, Microsoft 365, SharePoint, Azure, and external APIs. Troubleshoot and optimize applications, document technical solutions, collaborate with stakeholders, and support deployments and user adoption.

Design and develop .NET web components for enterprise pension administration applications. Build test utilities and automated regression coverage, maintain test harnesses and environments, author test plans and requirements, validate data with SQL, and participate in defect triage and release readiness. Collaborate with technical leadership, QA, and stakeholders on documentation, requirements analysis, functional and non-functional testing, performance testing, and weekly status reporting.

Leads the design, development, and implementation of full-stack applications using C#, .NET, Angular, Azure, and SQL Server. Collaborates with cross-functional teams, ensures application security, performance, and scalability, applies Git-based version control practices, mentors developers, and stays current with emerging technologies.

Design, develop, test, and support scalable full-stack applications and cloud-native microservices using .NET, Angular, AWS, SQL, and NoSQL technologies. Build APIs, data integrations, ETL pipelines, and CI/CD solutions while improving system performance, reliability, and scalability. Collaborate with product, architecture, and engineering teams, participate in design and code reviews, troubleshoot applications, document technical solutions, and apply modern DevOps and AI-assisted development practices.

Develop and maintain C#/.NET application functionality and reusable automation across web applications, APIs, databases, and business workflows. Build browser, API, integration, and end-to-end automated tests; perform SQL-based validation and reconciliation; integrate testing into CI/CD pipelines; investigate failures; and collaborate with product, business analysis, DevOps, and engineering teams.

Build, modernize, and maintain cloud-native .NET websites and applications. Design and develop full-stack solutions across application layers, troubleshoot software issues, and ensure compatibility, usability, web standards, and quality delivery. Collaborate with developers, end users, and cross-functional teams to define and implement IT solutions, while contributing to governance, change management, and application modernization.

Design, develop, and modernize scalable enterprise applications using .NET/C# backend services and React/TypeScript frontends. Build secure REST APIs, micro-frontends, and cloud-native solutions; apply clean architecture, testing, CI/CD, and observability practices. Collaborate with architects, product owners, DevOps, QA, and platform teams. Provide technical leadership, mentor engineers, document designs, address scalability and technology risks, and support reliable production deployments in a regulated financial-services environment.

Design, develop, and modernize scalable enterprise applications using .NET, C#, React, and TypeScript. Build secure REST APIs, microservices, and micro-frontends; implement clean architecture, testing, CI/CD, observability, and cloud-native practices. Collaborate with architects, product owners, DevOps, and QA teams, mentor engineers, support production systems, resolve incidents, and address scalability, technology risk, and regulatory requirements.

Develops, tests, debugs, maintains, and enhances complex financial software applications using .NET technologies. Translates technical and functional specifications into technical designs, resolves architectural issues involving scalability, performance, reliability, usability, and security, and contributes to development standards and strategic technical planning. The role is performed onsite Monday through Friday in Lincoln, Nebraska.

Lead development of .NET applications supporting complex financial processes for a state agency. Responsibilities include hands-on software development, systems analysis, requirements translation, QA oversight, troubleshooting, process documentation, business transformation support, roadmap definition, and development standards. The role requires collaboration with architects and distributed teams in a fully onsite environment, with occasional Saturday or on-call coverage.

Designs, develops, tests, deploys, and supports scalable software products and platform capabilities using C# and modern .NET. Builds APIs, backend services, frontend components, integrations, and AI-enabled application features in Azure. Owns capabilities through production support, modernization, monitoring, and continuous improvement. Contributes to architecture, code reviews, CI/CD, security, reliability, and technical planning while collaborating with global Product, Engineering, Architecture, Security, and Platform teams. Mentors engineers and supports maintainable, production-grade applications.

Designs, develops, tests, deploys, and manages .NET full-stack applications supporting FBI IT infrastructure. Responsibilities include integrating third-party components, enhancing existing code, automating operations and maintenance, large-scale data processing, statistical modeling, advanced analytics, and full software development lifecycle participation. The role also conducts architecture reviews, milestone reviews, resource estimation, process improvement, quality assurance, and team mentoring.

Owns the full lifecycle of critical banking applications and services, including architecture, development, testing, deployment, modernization, production support, and retirement. Designs secure, resilient solutions using C#/.NET, APIs, databases, cloud platforms, containers, and DevOps tooling. Leads technical analysis, code and design reviews, incident response, resiliency improvements, regulatory compliance, and cross-team coordination. Mentors engineers and evaluates AI-assisted development tools while maintaining security, quality, and operational standards.

Develops, deploys, tests, monitors, and maintains full-stack applications and enterprise systems. Resolves business and system issues, improves system performance, implements technology strategies, and ensures compliance with cybersecurity and risk-management practices. The role requires C#, .NET, JavaScript or TypeScript, SQL Server, SSIS, SSRS, Entity Framework Core, authentication, authorization, and software testing experience. It also provides technical guidance and training to junior engineers.

Leads application development and systems analysis initiatives, partnering with management and technology teams to deliver system enhancements and process improvements. Designs applications aligned with architecture standards, establishes coding and testing practices, resolves complex technical and business problems, and advises mid-level developers and analysts. The role also manages project priorities, assesses risk, ensures regulatory compliance, and supports successful implementation of new products and applications.

Lead design and delivery of scalable full‑stack, cloud‑native applications. Drive architecture, AI‑assisted tooling, DevOps and observability practices, implement microservices/APIs, mentor engineers, and publish documentation and runbooks to ensure reliability and operational excellence.

The Senior Full Stack Engineer will modernize legacy systems to microservices, maintain .NET applications, optimize SQL databases, and develop frontend interfaces.

Maintain and modernize a stable .NET/SQL Server platform while leading migration from monoliths to cloud-native microservices. Design APIs and event-driven patterns, containerize deployments, optimize backend .NET apps and SQL performance, and build responsive frontends integrated with microservices. Collaborate across cross-functional teams to ensure scalable, highly available systems.