Sign up to access all features of our service.
  • Job search
  • Favorites
  • Create a CV
    New
  • Salaries
  • Subscriptions

Senior / Lead .NET Developer

Full-time

American IT Systems

Key Responsibilities

    • Design, develop, test, deploy, and maintain enterprise applications using C#, ASP.NET, ASP.NET Core, MVC, Web API, and related Microsoft technologies.
    • Modernize legacy .NET applications and services to improve performance, reliability, maintainability, and user experience.
    • Build and consume RESTful APIs and web services to support integrations with internal and external systems.
    • Develop responsive user interfaces using HTML5, CSS, Bootstrap, JavaScript, jQuery, Angular, and React where applicable.
    • Create and optimize SQL queries, stored procedures, triggers, indexes, and database objects across SQL Server and other relational databases.
    • Participate in requirements gathering, analysis, technical design, solution estimation, documentation, testing, and implementation activities.
    • Support Agile delivery practices, including sprint planning, backlog refinement, code reviews, unit testing, and release coordination.
    • Provide production support, troubleshoot application issues, analyze root causes, and implement corrective actions.
    • Collaborate with business users, product owners, QA teams, infrastructure teams, and offshore/onshore development teams.
    • Contribute to CI/CD pipelines, source control practices, build automation, and deployment processes using tools such as Azure DevOps, GitHub, and TFS.

Required Qualifications
    • 10+ years of professional software development experience, preferably with significant hands-on experience in the Microsoft technology stack.
    • Strong experience with C#, .NET Framework, ASP.NET, ASP.NET Core, MVC, Web API, ADO.NET, Entity Framework, WCF, and related technologies.
    • Experience developing and supporting N-tier, client/server, web-based, and service-oriented applications.
    • Strong database development skills with SQL Server, including query optimization, stored procedures, triggers, and performance tuning.
    • Experience with front-end development using HTML5, CSS, Bootstrap, JavaScript, jQuery, Angular, React, JSON, and AJAX.
    • Working knowledge of object-oriented programming principles, SOLID principles, design patterns, and clean coding practices.
    • Experience with source control, DevOps, and delivery tools such as Azure DevOps, GitHub, TFS, Visual Studio, VS Code, Postman, and SoapUI.
    • Ability to create technical design documents, use cases, test cases, deployment documentation, and user-facing documentation.
    • Strong analytical, troubleshooting, communication, and stakeholder-management skills.
Preferred Qualifications
    • Experience leading small development teams or coordinating work between onshore and offshore teams.
    • Experience with application modernization, legacy system remediation, technical debt reduction, and platform upgrades.
    • Experience integrating third-party services, AI-enabled services, transcript/document processing, or business workflow automation.
    • Experience in manufacturing, automotive, legal technology, industrial, or enterprise business systems environments.
    • Familiarity with Oracle, DB2, LiteDB, PostgreSQL, SharePoint, IIS, Windows Server, and cloud-oriented delivery practices.
Education and Certifications
    • Bachelor's degree in Computer Science, Information Technology, Engineering, or a related field preferred; equivalent professional experience may be considered.
    • Advanced degree or formal computer applications education is a plus.
    • Relevant Microsoft, .NET, cloud, DevOps, database, or application development certifications are preferred.
Technical Skill Areas

Category

Representative Skills

Languages and Frameworks

C#, VB.NET, ASP.NET, ASP.NET Core, MVC, .NET Framework, LINQ, Entity Framework

APIs and Services

REST, SOAP, Web API, WCF, backend services, third-party integrations

Front-End

HTML5, CSS, Bootstrap, JavaScript, jQuery, Angular, React, AJAX, JSON

Databases

SQL Server, Oracle, DB2, PostgreSQL, LiteDB, stored procedures, triggers, query optimization

DevOps and Tools

Azure DevOps, GitHub, TFS, Visual Studio, VS Code, Postman, SoapUI, SSMS

Delivery Practices

Agile, Waterfall, CI/CD, code reviews, testing, production support, technical documentation

Vacancy posted 2 days ago
Similar jobs that could be interesting for youBased on the Senior / Lead .NET Developer in Lisle, IL vacancy
  • Position OverviewWe are looking for a skilled Lead .Net Developer to contribute to our Commercial Sales Experience (CSE) product initiative.The ideal candidate is proficient in the full software development lifecycle using an Agile framework, enhancing existing web applications... 
    Suggested
    Permanent employment
    H1b
    Visa sponsorship

    International Motors

    Lisle, IL
    23 hours ago
  •  ...Coherent Solutions is seeking a senior .NET Developer to contribute to large-scale enterprise platforms, including a device-focused app and a business web platform for access management. You will collaborate with cross-functional teams to deliver scalable, reliable solutions... 
    Senior

    Jobleads-US

    Oak Brook, IL
    5 days ago
  • $50 - $65 per hour

     ...Job Description Job Description Senior .NET / Full Stack Developer Location: Oak Brook Area, IL Employment Type: 12-Month Contract with Potential...  ...the software development lifecycle. ·        Lead technical execution for larger projects or application modules... 
    Senior
    Hourly pay
    Permanent employment
    Contract work
    Local area

    Addison Group

    Oak Brook, IL
    19 days ago
  •  ...Senior Software DeveloperLocation: Lisle, IL (onsite)Duration: Long termResponsibilities...  ...primary responsibility of the Senior Software Developer includes designing, coding, testing, and...  ...procedures, etc.)Expertise in C# and.NET, .Net Core., C, C++Experience with Azure... 
    Suggested

    Software Technology Inc

    Lisle, IL
    2 days ago
  •  ...Job Description AECOM is seeking an experienced Senior Technical Lead to join our Environmental Remediation practice in the Lisle...  ...Illinois EPA TACO regulations and remediation objectives. Develop remediation strategies and evaluate remedial technologies for... 
    Senior
    Full time
    For subcontractor
    Work at office
    Local area
    Worldwide
    Flexible hours

    AECOM

    Lisle, IL
    5 days ago
  • $31 - $34.5 per hour

     ...represent TurboTax locally, serving as a fixture and public face of TurboTax in the community. \n Engage with new prospects, nurture leads, and convert prospects into long-term clients through proactive outreach. \n Lead and participate with the support of TurboTax in... 
    Senior
    Local area

    Intuit

    Downers Grove, IL
    6 days ago
  •  ...Role : .NET Full Stack Developer Location : Lisle, IL ( HYBRID ) Position Type : Contract Job Description: We are seeking an experienced .NET Full Stack Developer to support our Commercial Sales Experience (CSE) product initiative. The ideal candidate will... 
    Contract work

    Apptad Inc

    Lisle, IL
    2 days ago
  •  ...enterprise backend development utilizing C#, ASP.NET, and .NET Core. Proficiency in...  ...Responsibilities Architect and develop scalable full-stack web applications...  ...Founded in 1999, Resourcesoft, Inc. is a leading Technology Consulting and Professional Services... 

    RESOURCESOFT, INC.

    Lisle, IL
    2 days ago
  • $109k - $149.88k

     ...Happen at Mondelēz International?Join our Mission to Lead the Future of Snacking. Make It With Pride.Senior Technical Oven Lead will be strongly linked to...  ...improvements and cost savings opportunities. You will develop project objectives, technical approach, project plans... 
    Senior
    Full time
    Work at office
    Relocation package

    Mondelēz International

    Naperville, IL
    23 hours ago
  •  ...Job PostingThe candidate has a history with all of the below:2+ Years in .NET DevelopmentSomeone willing to work onsite 100% in Wheaton, ILSomeone with work authorization status of USC or GC (not GC EAD)Of the following list, the candidate has a history with 2+ items:C#ASP... 

    RIT Solutions

    Wheaton, IL
    2 days ago
  • $90 - $120 per hour

    Senior Audit Associate / Lead AuditorBased in Westmont, IL, we are a top-rated public accounting and business advisory firm providing audit, accounting...  ...risk assessments, evaluate internal controls, and develop audit proceduresExecute audit testing, review workpapers,... 
    Senior

    CyberCoders

    Westmont, IL
    2 days ago
  •  ...Duly Health and Care is seeking a Senior Human Resources Business Partner - Providers to lead onboarding, integration, and development for physicians and advanced practice providers. You will guide them from day one through ramp to full productivity and shareholder eligibility... 
    Senior

    Duly Health and Care

    Downers Grove, IL
    2 days ago
  •  ...Position:.NET Developer Location: Westchester, IL Duration: 12 Months 100% Onsite role need only locals .Net/MVC consultants to work on the buyer services project. 5 to 8 years of relevant Application Development experience. Technology (must): C#, ASP .NET MVC,... 
    Local area

    Georgia IT Inc

    Westchester, IL
    3 days ago
  •  ...quality solutions. Technologies ASP.NET Core (.NET 6/8/10), C# REST APIs Entity...  ...Grafana, DataDog What You\'ll Do Develop high-quality code in accordance with coding...  ...platform; Communicate daily with tech leads and engineers; Job Requirements ~5+ years... 
    Remote work
    Worldwide
    Flexible hours

    Coherent Solutions

    Oak Brook, IL
    23 hours ago
  •  ...apply technology - on the people leading, supporting and optimizing...  ...Journal (2016).Job DescriptionC# developer with WPF and/or...  ...WPF will be given preference.• Senior developer with WPF/ Silverlight...  ...and support Web and Windows .NET applications for internal systems... 
    Temporary work
    Work at office

    USM Systems

    Naperville, IL
    1 day ago
  • $110k - $130k

     ...Senior Account ManagerZayo provides mission-critical bandwidth to the world's most impactful...  ...services. The successful candidate will develop customer relationships and drive sales of...  ...in a market to drive on and near net sales. Understand local competitive dynamics... 
    Senior
    Work experience placement
    Work at office
    Local area
    Remote work

    Zayo Group

    Downers Grove, IL
    2 days ago
  • $90k - $115k

     ....NET Developer - Manufacturing Industry - Chicago Suburbs (Bilingual Spanish Required)A well-established, family-owned manufacturer in the...  ...Server, and JavaScript/jQuery, working closely with the team lead as legacy desktop tools continue moving to the web. This is a... 

    Strategic Employment

    Lockport, IL
    2 days ago
  •  ...firm that provides you the autonomy to own your schedule and career through structured programs You want to grow professionally and develop your client service and technical accounting skills to build a career with endless opportunities What you will do: Be a trusted... 
    Senior

    CPS

    Lisle, IL
    23 hours ago
  •  ...Senior Project ManagerAt Koch, employees are empowered to do what they do best to make life better. Learn how our business philosophy helps employees unleash their potential while creating value for themselves and the company.Additionally, everyone has individual work... 
    Senior

    Koch Industries

    Lisle, IL
    2 days ago
  • $120k - $130k

     ..., the organization requires a senior technical leader who can translate...  ...high-performing solutions.The Lead Software Engineer is...  ...and engineering standardsMentor developers and raise the technical bar across...  ...experience)Deep expertise in modern .NET technologies (.NET 6/7/8, ASP.... 
    Full time

    Roadrunner Freight

    Downers Grove, IL
    3 days ago
  •  ...A consulting firm in Downers Grove, IL is seeking a Senior Accountant consultant. Responsibilities include partnering with accountants, preparing journal entries, and reconciling financial reports. Candidates must have hands-on experience with Infor M3, along with strong... 
    Senior
    Remote work

    Korn Ferry

    Downers Grove, IL
    1 day ago
  •  ...Senior .NET Job Description – CSE We are looking for a skilled .NET developer to contribute to our Commercial Sales Experience (CSE) product initiative. The ideal candidate is proficient in the full software development lifecycle using an Agile framework, enhancing... 

    Commserve Technologies

    Lisle, IL
    23 hours ago
  •  ...Net Application Developer Sonoma Consulting is one of the fastest growing national IT Consulting and Executive Search company in the United States, which was founded in 2011 by Mark McGee, the President and CEO. Sonoma Consulting has two business divisions - IT Consulting... 
    Local area

    Sonoma Consulting

    Oak Brook, IL
    23 hours ago
  • Position OverviewInternational Corporation is a leading North American truck manufacturer with a...  ...of scalable applications using .NET (C#) and/or Java, ensuring high-quality,...  ...smart as the people who drive them. We also develop Fleetrite® aftermarket parts. In everything... 
    Permanent employment
    H1b
    Visa sponsorship

    International Motors

    Lisle, IL
    4 days ago
  •  ...have an exciting opportunity for a Senior Product Engineer - Palantir / AI Lead (FDE) Platform to help accelerate that...  ...and development tools (.Net, C#, SQL, Python, Java, JS/React, etc...  ...the people who drive them. We also develop Fleetrite® aftermarket parts. In everything... 
    Senior
    Permanent employment
    H1b
    Work at office
    Remote work
    Visa sponsorship
    Monday to Thursday

    International Motors

    Lisle, IL
    3 days ago
  •  ...Senior Internal Controls Analyst Downers Grove, Illinois, United States About the Job Senior Internal Controls Analyst Our ideal candidate will work closely with Management to create/update process documentation, update the Risk and Control Matrix in Audit Board... 
    Senior
    Work experience placement

    Delfos

    Downers Grove, IL
    1 day ago
  • Molina Healthcare in Downers Grove, IL is looking for an executive leader to oversee network operations and contracting activities. This role requires negotiating complex contracts critical to effective healthcare delivery and fostering relationships with providers. ...
    Senior

    Jobleads-US

    Downers Grove, IL
    2 days ago
  •  ...Senior Lifestyle is seeking an on-site executive to lead day-to-day operations of our senior living community in Lisle, Illinois. You will be the primary contact for staff, residents, families, and partners, ensuring exceptional hospitality, resident satisfaction, and... 
    Senior

    Senior Lifestyle

    Lisle, IL
    2 days ago
  •  ...As the Lead   R&D Product Developer , the candidate will lead R&D projects within their area of expertise. They will work closely with a team of scientists and researchers to innovate, develop new products or processes, and improve existing ones. Their role will involve... 
    Temporary work

    The Fresh Factory

    Downers Grove, IL
    more than 2 months ago
  •  ...Senior LLM Engineer Location(s) Austin, Texas | Fremont, California | Lisle, Illinois Eligible for remote Yes Company Molex Career...  ...& Analytics Job Number 192106 As a Koch company, Molex is a leading supplier of connectors and interconnect components, driving innovation... 
    Senior
    Remote work

    Koch Industries

    Lisle, IL
    9 hours ago

Do you want to receive more vacancies?

Subscribe and receive similar vacancies to Senior / Lead .NET Developer. Be the first to apply!