Senior Fastapi Developer Jobs in Stamford, CT (NOW HIRING)

About the role
As a Senior Python Developer, you will make an impact by designing and building scalable Python applications, REST APIs, and data-driven solutions. You will be a valued member of the technology delivery team and work collaboratively with engineers, architects, product partners, and client stakeholders to deliver reliable, secure, and maintainable solutions.
Cognizant will only consider applicants for this position who are legally authorized to work in the United States without requiring Visa transfer or sponsorship now or at any time in the future.
In this role, you will:
Design, develop, test, and maintain scalable Python applications using object-oriented and/or functional programming practices.
Build and consume REST APIs using frameworks such as Flask, FastAPI, or Django.
Apply API design principles, including authentication and authorization using OAuth or JSON Web Tokens, API versioning, error handling, and documentation.
Develop event-driven and asynchronous solutions using Google Cloud Pub/Sub.
Create efficient SQL queries and data solutions using BigQuery or comparable large-scale SQL databases.
Work with relational and/or NoSQL databases, optimizing queries for application performance and scalability.
Participate in code reviews, troubleshoot technical issues, and use Git-based version control to support high-quality software delivery.
Collaborate with cross-functional teams to translate business and technical requirements into effective solutions.
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 requiring 3 days per week in a client or Cognizant office in New York, New York. 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
6 to 8 years of software development experience, with strong proficiency in Python.
Experience applying object-oriented and/or functional programming concepts to production applications.
Proven experience designing, developing, and consuming REST APIs.
Hands-on experience with Flask, FastAPI, Django, or a comparable Python web framework.
Strong knowledge of API design principles, including OAuth, JSON Web Tokens, authorization, authentication, and versioning.
Experience with SQL databases and writing efficient queries.
Proficiency with Git or another distributed version control system.
Strong problem-solving, communication, collaboration, and attention-to-detail skills.
These will help you stand out
Experience developing event-driven or asynchronous solutions using Google Cloud Pub/Sub.
Experience using BigQuery or a comparable platform for large-scale data analytics and querying.
Familiarity with both relational and NoSQL databases.
Experience improving API reliability, scalability, security, or performance.
Ability to communicate technical decisions clearly to engineering and nontechnical stakeholders.
Bachelor's degree in Computer Science, Information Technology, Engineering, or a related field, or equivalent professional experience.
Note: Certain roles may require candidates to attend in-person interviews at Cognizant offices or client locations, depending on project requirements.
Applications will be accepted until September 11th, 2026.
Salary and Other Compensation:
The annual salary for this position is between $65,447 to $117,000 depending on experience and other qualifications of the successful candidate.
This position is also eligible for Cognizant's discretionary annual incentive program, based on performance and subject to the terms of Cognizant's applicable plans.
Benefits: Cognizant offers the following benefits for this position, subject to applicable eligibility requirements:
• 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
Disclaimer: The salary, other compensation, and benefits information is accurate as of the date of this posting. Cognizant reserves the right to modify this information at any time, subject to applicable law.
About Cognizant:
Cognizant (Nasdaq: CTSH) is an AI Builder and technology services provider, bridging the gap 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, drive tangible outcomes and keep global enterprises ahead in a fast-changing world. See how at cognizant.ai or @cognizant.
Additional employment information
Compensation information is accurate as of the date of this posting. Cognizant reserves the right to modify this information at any time, subject to applicable law.
Applicants may be required to attend interviews in person or by video conference. In addition, candidates may be required to present their current state or government issued ID during each interview.
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, state 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] for roles based in the Americas or [email protected] for roles based in India.