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Senior (.NET & React)

00069576801

Senior Software Engineer (.NET & React)

About the Role

As a Senior Software Engineer, you will make an impact by designing, building, and optimizing enterprise-grade applications using C#, .NET Core, .NET Framework, React.js, and modern JavaScript. You will be a valued member of the engineering team, collaborating with product managers, architects, business stakeholders, and cross-functional teams to deliver secure, scalable, and high-performing digital solutions.

In This Role, You Will:

  • Design and develop scalable enterprise applications using C#, .NET Core, and .NET Framework to support critical business operations.
  • Build and maintain RESTful APIs and backend services that enable seamless integration between systems and front-end applications.
  • Develop modern, responsive user interfaces using React.js, JavaScript ES5/ES6, and contemporary front-end development practices.
  • Enhance application performance, reliability, and maintainability through code optimization, refactoring, and adoption of engineering best practices.
  • Partner with product managers, architects, and business stakeholders to translate requirements into robust technical solutions and deliver high-quality software in an Agile environment.

Work Model

We believe hybrid work is the way forward as we strive to provide flexibility wherever possible. Based on this role’s business requirements, this is a hybrid position in Hardfort, CT requiring 3 days attendance at a client office. Regardless of your working arrangement, we are here to support a healthy work-life balance through our various wellbeing programs.

The working arrangements for this role are accurate as of the date of posting. This may change based on the project you’re engaged in, as well as business and client requirements. Rest assured; we will always be clear about role expectations.

What You Need to Have to Be Considered

  • Extensive experience developing enterprise applications using C#, .NET Core, and .NET Framework.
  • Strong proficiency in React.js, JavaScript (ES5/ES6), and modern front-end development methodologies.
  • Experience designing and implementing RESTful APIs, microservices, and system integrations.
  • Solid understanding of software engineering principles, object-oriented design patterns, testing methodologies, and secure coding practices.
  • Experience working in Agile development environments, utilizing version control systems and CI/CD pipelines.
  • Strong analytical, troubleshooting, and problem-solving skills with the ability to diagnose and resolve complex technical issues.

These Will Help You Stand Out

  • Experience with cloud-native application development and deployment.
  • Knowledge of application monitoring, logging, and performance optimization practices.
  • Experience creating automated testing frameworks and improving test coverage across front-end and back-end solutions.
  • Familiarity with scalable architecture patterns and enterprise security standards.
  • Microsoft Certified: Azure Developer Associate or other relevant Microsoft/.NET or cloud certifications.

Benefits

Cognizant offers the following benefits for this position, subject to applicable eligibility requirements:

  • Medical, Dental, Vision, and Life Insurance
  • Paid Holidays and Paid Time Off (PTO)
  • 401(k) Plan with Company Contributions
  • Short-Term and Long-Term Disability Coverage
  • Paid Parental Leave
  • Employee Stock Purchase Plan (ESPP)

We're excited to meet people who share our mission and can make an impact in a variety of ways. Don't hesitate to apply, even if you only meet the minimum requirements listed. Think about your transferable experiences and unique skills that make you stand out as someone who can bring new and exciting things to this role.

This position does not offer visa sponsorship. Candidates must be authorized to work without sponsorship now or in the future, including OPT, CPT, or any other work authorization requiring employer sponsorship.

What we offer

  • The chance to work with impact. Here, you’re empowered to bring your biggest thinking to help our company and clients improve everyday life.
  • Ownership over your career. Stay at the top of your game through our award-winning learning and development ecosystem. And when your ambitions change or we offer new opportunities, we help you pivot by providing reskilling, on-the-job learning and guidance to find new roles that might be a better fit.
  • The opportunity to thrive on a high caliber team with heart. We celebrate each other’s experiences and perspectives and promote a sense of belonging through our affinity groups and diversity and inclusion initiatives.
  • A comprehensive total rewards package, including a competitive salary and a pension plan with matching contributions.
  • Flexible health and financial benefits to support you and your eligible dependents—from day one.
  • True work-life balance. Be at your best through paid time off, flexible work arrangements, volunteering opportunities, social events, and so much more.  

About us
Cognizant (Nasdaq: CTSH) is an AI Builder and technology services provider, building the bridge between AI investment and enterprise value by building full-stack AI solutions for our clients. Our deep industry, process and engineering expertise enables us to build an organization’s unique context into technology systems that amplify human potential, realize tangible returns and keep global enterprises ahead in a fast-changing world. See how at www.cognizant.com or @cognizant.

Other employment-related information
Cognizant is an equal opportunity employer. Your application and candidacy will not be considered based on race, color, sex, religion, creed, sexual orientation, gender identity, national origin, disability, genetic information, pregnancy, veteran status or any other characteristic protected by federal, provincial or local laws.

If you have a disability that requires reasonable accommodation to search for a job opening or submit an application, please email [email protected] with your request and contact information.

Language requirements vary depending on roles, but we ask that all candidates have basic English proficiency for company-wide communications purposes. For roles based in Quebec, professional English proficiency is required, as you’ll deliver services to and collaborate with stakeholders outside the province who may not speak French.

Your path to Cognizant

Wondering what to expect after you apply? Here’s a peek at our recruitment process—and keep in mind that not all candidates advance through every step and the process may vary depending on your role and location.

Your Application Midnight Blue RGB

Step 1: Application

Find an open role that aligns with your skills and career goals and show us why you’re the person for the job. Consider joining our Talent Community if you don’t find the right opportunity.

Phone Call Midnight Blue RGB

Step 2: Recruiter call

If one of our recruiters sees a fit, they’ll set up a short introductory call to learn more about you and how your experiences and skills align with the role.

Step 3: Interview(s)

If you and our team would like to continue the process, you’ll meet with one of our hiring managers. Some roles may also require technical assessments and/or client interviews.

Step 4: Final decision

Our hiring team will then review each candidates’ potential to succeed in the role. This process may take some time because we want to get it right—but you can count on us to keep you updated.

Benefits that help you thrive and grow

Our teams achieve incredible things when they feel fully supported. That’s why our benefits program is built around the diverse needs of our people—so they can enjoy a fulfilling, balanced and healthy life.

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Financial wellbeing

Financial wellbeing

We regularly review market data to ensure compensation is competitive and reflects the value you bring. Your benefits extend beyond pay and may include retirement plans, financial education, discount programs, etc.

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Physical and mental wellbeing

Physical and mental wellbeing

We empower you to prioritize your wellbeing through paid time off, flexible working where possible, healthcare plans, counselling, our Mental Health Allyship program and more. 

Your Career, Your Way
Your career, your way

Your career, your way

With 90% of our associates building skills through GenAI training, job shadowing, industry certifications and more, you have everything you need to build a full career.

Professionals
Real-world impact

Real-world impact

Think about the biggest brands you rely on. Chances are, they rely on us to help strengthen their business. Here, you’ll turn bold ideas into solutions that improve lives everywhere.

02.2026 Superlearner Debashish
"Cognizant has one of the best learning ecosystems you can ask for. From sponsored certifications to training platforms to mentorship, we have all that we need to grow.”
Debashish Mishra SAP MM Developer
Laura Reynaud
"Cognizant offers me more than a job; it offers a community. We support each other, collaborate across borders and celebrate wins together. If you’re looking for a culture that values flexibility, diversity and growth, this is the place to be."
Laura Reynaud Lead Counsel
Lucas Hoffman
“I’ve had the chance to work on impactful projects and shadow colleagues, all while getting involved in internal initiatives. The world is your oyster at Cognizant—you just need to take advantage of it!”
Lucas Hoffman Consultant
Sujatha’S Journey Main
“When I first joined, I was quiet and hesitant to share my thoughts. The leadership programs and the mentoring I’ve received have helped me find my voice and grow as a leader.”
Sujatha Gopalakrishnan Portfolio Delivery Lead
Paulo Miguel Epili Main
"Nobody here says ‘that’s not my job.’ People just help. That’s the entrepreneurial culture that makes me stay at Cognizant.”
Paulo Miguel Epili Sr. Process Executive

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