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Python Full-Stack Developer

00069295701

Job Description: Python Full-Stack Developer

Position Overview

We are seeking a Senior Python Developer to own end-to-end development and maintain scalable web applications across the full stack - from backend APIs and data layers to frontend interfaces and cloud deployment. This role requires strong ownership of technical decisions, the ability to mentor junior engineers and the judgment to balance pragmatic delivery with long-term maintainability.

Key Responsibilities

Core application development

  • Design, build, and maintain RESTful APIs using Python frameworks (e.g., FastAPI, Django, Flask)
  • Architect scalable, maintainable backend services and data models
  • Write clean, well-tested, production-grade code and enforce code quality through reviews
  • Optimize application performance, including query optimization and caching strategies.
  • Design and optimize relational (PostgreSQL) data models
  • Write efficient queries, manage migrations and ensure data integrity across services
  • Build and maintain CI/CD pipelines for automated testing and deployment
  • Work with containerization (Docker) and orchestration (Kubernetes) where applicable.
  • Write and maintain unit, integration, and end-to-end tests (pytest, unittest or equivalent)

Cross-functional & delivery

  • Communicate proactively with the client's technical and non-technical stakeholders on progress, risks, and design tradeoffs
  • Participate in sprint/PI planning and translate high-level or ambiguous requirements into concrete technical designs and acceptance criteria
  • Mentor junior developers on the team and review their code, particularly around AI-integration and validation logic

Required Qualifications & Skills

  • 5-8+ years of professional software development experience, with strong depth in Python (3.x)
  • Backend framework expertise -Django or FastAPI
  • Database expertise - strong SQL skills, experience with at least one relational database ( PostGres)
  • API design - REST Principles, authentication/authorization patterns (OAuth2, JWT)
  • Cloud platform experience - hands-on with AWS, Azure, or GCP (compute, storage, managed databases)
  • Version control & collaboration - Git, code review workflows or GitFlow branching strategies
  • Testing discipline - strong track record of writing maintainable, meaningful test coverage
  • CI/CD - experience building or maintaining pipelines
  • Strong communication skills - able to explain technical tradeoffs to non-technical stakeholders and write clear documentation
  • Problem-solving and debugging - comfortable diagnosing issues across the full stack, from frontend rendering to backend performance to infrastructure

Nice to Have

  • AI/LLM familiarity - exposure to integrating LLM APIs into application workflows
  • Prompt engineering - basic understanding of structuring prompts and structured/JSON output handling
  • RAG (Retrieval-Augmented Generation) - conceptual familiarity with embeddings, vector search, and grounding LLM outputs in retrieved data.
  • Containerization & Orchestration - Docker, Kubernetes
  • Microservices architecture experience.

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.

Things to know before you apply

  • Work authorization: Cognizant will only consider applicants for this position who are legally authorized to work in Canada without requiring employer sponsorship, now or at any time in the future.
  • Accommodations: 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.
  • AI in hiring: We use artificial intelligence (AI) tools to help us screen and assess applications more efficiently. Our team performs additional human review and ultimately decides who moves forward in our hiring process.
  • Open position: Unless otherwise stated, this job posting is for an open position on our team.
  • Language proficiency: 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.
  • Inclusion: 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.

Benefits that help you thrive and grow

Our benefits program is built with you in mind—so you can enjoy a fulfilling, balanced and healthy life.

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Financial wellbeing

We regularly review market data to ensure compensation reflects the value you bring. Your benefits extend beyond pay and may include financial education, a pension plan with matching contributions, etc.

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Physical and mental health

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. 

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Your career, your way

With 350,000+ roles at Cognizant, you’ll have opportunities explore new technologies, industries and locations—and build the skills you need to grow your career.

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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.

Your path to Cognizant

Here’s what you can expect from our hiring process. Please keep in mind that it may vary by role and location. Explore our FAQs to learn more.

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Step 1: Apply to the right opportunity

Find an open role that matches your skills and career goals and show us why you’re the person for the job. Don’t see the right opportunity? Consider joining our Talent Community.

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Step 2: Connect with your recruiter

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

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Step 3: Show off your skills

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

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Step 4: Decision time

Our team will then review each candidates’ potential to succeed in the role. This step may take some time because we want to find the right fit for both you and us—but you can count on us to keep you updated.

CAN Brigitte
Cognizant is great for those wanting to make the world a better place, as we create solutions with top technology partners to address complex problems for our clients.
Brigitte Roy Director of Strategy Alliances
CAN Rahul
I’m supported by motivational leaders who empower me to grow in my career through learning programs, industry conferences and internal job moves. I’m proud of the career progression I’m making here.
Rahul Sathe Principal Product Architect – Insurance
Can Amita
The moment I joined Cognizant, I felt like I belonged. I was heard and empowered to challenge ideas—and I still am to this day.
Dr. Amita Oppal Gill Service Line Sales Manager
1 (2)
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

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