Web API jobs in Chicago, IL

.NET Lead Developer - Lisle, IL (In person interview)

Hybrid in Lisle, Illinois

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9d ago

Required Qualifications12+ 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 proce

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Third Party, Contract

Depends on Experience

Senior Application Security Engineer

Chicago, Illinois

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Today

Passionate about precision medicine and advancing the healthcare industry? Recent advancements in underlying technology have finally made it possible for AI to impact clinical care in a meaningful way. Tempus' proprietary platform connects an entire ecosystem of real-world evidence to deliver real-time, actionable insights to physicians, providing critical information about the right treatments for the right patients, at the right time. Tempus is seeking a Senior Application Security Engineer

Full-time

USD 130,000.00 - 180,000.00 per year

Lead Software Engineer, API Integrations

Chicago, Illinois

•

Today

We're building a relationship-oriented bank for the modern world. We need talented, passionate professionals who are dedicated to doing what's right for our clients. At CIBC, we embrace your strengths and your ambitions, so you are empowered at work. Our team members have what they need to make a meaningful impact and are truly valued for who they are and what they contribute. To learn more about CIBC, please visit CIBC.com How You'll Succeed Strategic Development & Execution: Perform and coordi

Full-time

USD 150,000.00 - 170,000.00 per year

Lead Software Engineer (Full Stack)

Chicago, Illinois

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13d ago

About Northern Trust: Northern Trust, a Fortune 500 company, is a globally recognized, award-winning financial institution that has been in continuous operation since 1889. Northern Trust is proud to provide innovative financial services and guidance to the world's most successful individuals, families, and institutions by remaining true to our enduring principles of service, expertise, and integrity. With more than 130 years of financial experience and over 22,000 partners, we serve the world's

Full-time

USD 99,600.00 - 169,200.00 per year

Lead .Net Developer

Lisle, Illinois

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Today

Position Overview We 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, ensuring long-term application performance and can work effectively in a collaborative and fast-paced environment. Responsibilities Developing Web APIs in .NET CoreWriting extensive unit tests and Web API testingRe

Full-time

USD 112,000.00 - 168,000.00 per year

SDET 3, Software Test Engineer QA - Hybrid in Oak Brook, IL

Oak Brook, Illinois

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Today

Chamberlain Group (CG) is a global leader in intelligent access and Blackstone portfolio company. Powered by our myQ technology, we make access simple and secure for millions of homeowners, businesses, and communities worldwide. Our flagship brands, LiftMaster and Chamberlain , are found in 51+ million homes, and 14 million+ people rely on the myQ app daily. This is a role within Chamberlain Group's Engineering team. The SDET Level 3 is a highly skilled senior-level engineer responsible for

Full-time

USD 76,600.00 - 144,700.00 per year

Senior Application Developer

Chicago, Illinois

•

Today

What We Need Corpay is currently looking to hire a Senior Application Developer within our ALE Solutions division. This position falls under our lodging line of business. In this role, you will be responsible for designing, developing, and maintaining software applications using the .NET framework. You will collaborate with cross-functional teams to create innovative solutions that meet the needs of our clients and enhance our product offerings. The ideal candidate will have a strong background

Full-time

USD 110,000.00 - 140,000.00 per year

Senior Full Stack .NET Developer - Remote

Remote or New York, New York

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Today

Job Role: Senior Full Stack .NET Developer Location: New York City, NY - Hybrid Duration: Long Term Project No C2C only W2 Job Summary: We are seeking an experienced Senior Full Stack .NET Developer to join our team in New York City. The ideal candidate will have strong full-stack development expertise with Angular 15+, C#/.NET, MS SQL Server, RESTful APIs, cloud platforms, and modern DevOps/CI/CD practices. Key Responsibilities: Design, develop, test, and maintain scalable full-stack web app

Contract

$DOE

Application Developer in Oklahoma City, OK

Remote or Hybrid in Oklahoma City, Oklahoma

•

Today

Location: Oklahoma City, OK Duration: 5-7 Years Requirements Knowledge of modern application development frameworks, programming languages, and secure coding practices Knowledge of software development lifecycle (SDLC) methodologies, including Agile Knowledge of business process analysis, functional design principles, documentation standards, user story development, and acceptance criteria definition Knowledge of Client business rules, including those specific to the Pension Software System Fam

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Third Party, Contract

Senior .Net Developer with AI Experience

Remote

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13d ago

We are seeking an experienced AI-First Senior Developer with strong expertise in Microsoft Azure, .NET Core, React, and TypeScript to design and develop next-generation healthcare applications. The ideal candidate will leverage AI-assisted development practices, Azure AI services, cloud-native architecture, and modern engineering principles to build scalable, secure, and compliant healthcare solutions. This role requires a combination of full-stack development expertise, cloud engineering skills

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Full-time

Depends on Experience

.Net/Azure/Angular 16 developer ((Remote - 4-5 times onsite per year)

Remote

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4d ago

Client: State of OK/Oklahoma Teachers Retirement System Job Title: Application Developer Location: 301NW 63rd Street, Oklahoma City Duration: 5-7 years Remote - but minimum is usually 2-3 times onsite per year. We do hold workshops that begin at 8-9am/CST and end at 4-5pm/CST for 3-4 consecutive days, so depending on the travels proximity to the meeting site in OKC, overnight travel may be required. Description The Teachers Retirement System of Oklahoma (TRS) is undertaking a comprehensive

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Contract, Third Party

$55 - $60

.Net Backend Developer with Azure

Remote

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4d ago

Role: .Net Backend Developer Location: East Hartford, CT (REMOTE) Relevant Experience: 9+ Years Senior .NET Backend Developer with Azure Cloud experience to join a core development team. The ideal candidate will have a minimum of 9 years of hands-on experience developing enterprise applications using Microsoft .NET technologies and modern cloud platforms. This role requires strong backend development expertise, experience with Angular, Azure services, CI/CD pipelines, and relational databases. W

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Third Party, Contract

Depends on Experience

Senior .NET Backend Developer - REMOTE

Remote

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2d ago

Sensiple Inc is a New Jersey corporation with over two decades of expertise in technology-driven solutions specialising in Customer Experience, Contact Center Solutions, Digital Transformation, Cloud Computing & Independent Testing. With an expert team that has enriched experience in executing & developing sustainable IT strategies in Healthcare, Technology, Retail, Logistics, Education, Telecommunications, Government and Media, we help our diverse customers to envision the future. By developing

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Contract

Depends on Experience

Lead Software Developer in Test (C#)

Remote or Hybrid in Cleveland, Ohio

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Today

Our Fortune 100 client is hiring for a Lead Software Developer in Test to assist the project team with driving quality-centric practices into their software development processes and will also be responsible for working closely with the project teams to guide their use of test automation assets and consult on the creation and use of new test automation. The role is open to fully remote but candidates but must be willing to work ET hours within the United States. Day-to-Day Responsibilities: - S

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Contract

DOE

Platform Architect

Remote

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2d ago

Role/ Title: Slack Architect / Platform Architect/ Collaboration Architect Location: Remote (USA) Duration: Long Term Contract Work Model: REMOTE Job Description: As a Slack Architect / Platform Architect/ Collaboration Architect you will support the design and evolution of collaboration platform solutions that operate at scale across office and home environments. Working under the guidance of senior architects, you will help translate requirements into clear designs, evaluate technology options

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Full-time

Depends on Experience

Collaboration Platform Engineer

Remote

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4d ago

Role/ Title: Slack Engineer/ Collaboration Platform Engineer Location: Remote (USA) Duration: Long Term Contract Work Mode: Remote Job Description: As a Slack Engineer/ Collaboration Platform Engineer, you will build and operate the integrations, bots, and workflow automation that make Slack work at enterprise scale. You will use the Slack platform APIs to automate administration and governance, connect Slack to systems such as ServiceNow, and remove repetitive operational toil. In this role yo

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Full-time

Depends on Experience

IT Developer

Remote

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6d ago

Job Title: IT Developer Remote Type: Contract Responsibilities Design, develop, configure, and customize Microsoft Dynamics 365 Customer Engagement applications.Develop Power Apps (Model-Driven and Canvas Apps), Power Automate flows, and Power Platform solutions.Build and maintain custom plugins, workflows, integrations, and APIs.Develop solutions using .NET, JavaScript, Power Fx, Dataverse, and Dynamics 365 Web API.Integrate Dynamics 365 with enterprise systems using Azure services, APIs, and c

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Contract

Depends on Experience

Senior /Staff Software Engineer

Remote

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25d ago

IntroductionRECRUITERS/AGENCY/CANDIDATES DO NOT APPLY. 10 PLUS YEARS EXPERIENCE AS sENIOR/STAFF SOFTWARE ENGINEER IS A MUST. This Senior /Staff Software Engineer position is a key role within our team, responsible for driving initiatives from inception to delivery. The ideal candidate will take ownership of complex projects, work autonomously with minimal supervision, and collaborate effectively with stakeholders. ResponsibilitiesAutonomously drive initiatives from inception to deliveryOwn compl

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Contract

Depends on Experience

Alfresco Developer

Remote

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4d ago

DirectClient: Texas Education Agency(TEA) Solicitation Number: 70127057 Title: Alfresco Developer Location: 1701 North Congress Avenue, Austin, Texas 78701 Duration: 9/1/2026 to 8/31/2027 with possible extension Last date for submission: August 20, 2026 (12.00 PM-CST) Important Note: The working position is Telework. Texas local candidates only. DESCRIPTION OF SERVICES: Development and enhancement of applications supporting Texas 1,247 school districts. Work across multiple agency stakeholders

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Contract, Third Party

Depends on Experience

Sr.Net with SSIS & SSRS exp

Remote or Hybrid

•

2d ago

Remote Please apply only if you have hands exp with - " SSIS & SSRS " Seeking a developer with strong foundation in the .NET framework and hands on expertise in C#,ASP.NET, ADO.NET, WebAPI, MVC, Javascript, CSS and PHP. Advance SQL Skills including SSAS,SSIS and SSRS, experience in sql stored procedures,query optimization,views, user define functions,indexing. ESP Scheduling tools, powershell scripting is a plus. Experience in pharmacy benefit management domain as well as exposure to Azure,Devop

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Contract

Web API jobs in Chicago, IL, USA