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# Senior Python Engineer

- **Company:** Cognizant Technology Solutions Corporation
- **Location:** Washington, DC, United States
- **Experience:** Expert
- **Salary:** $125,000.0
- **Contract:** Permanent contract
- **Skills:** Application Programming Interfaces (APIs), Agile Methodology, Artificial Intelligence, Business Logic, Application Performance Management, Application Services, Audit Trail, User Authentication, Automation of Tests, Unit Testing, Microsoft Azure, Cloud Engineering, Configuration Management, Software Quality, Code Review, Databases, Data Dictionary, Software Design Patterns, DevOps, HP Systems Insight Manager, Python (Programming Language), Key Management, PostgreSQL, Object-Oriented Software Development, Performance Tuning, Software Architecture, Query Optimization, Regression Testing, Release Management, Standard Sql, Swagger, Runbook, Service-Oriented Architecture, Software Engineering, Software Systems, SQL Stored Procedures, SQL Databases, System Integration Testing, Management of Software Versions, Openapi, Data Logging, Data Processing, Enterprise Software Applications, Sql Optimization, Caching, Reliability of Systems, Generative AI, Indexer, AI Coding Agents, Backend, Fastapi, Pytest, Integration Tests, Information Technology, Deployment Automation, Modeling and Simulation, Data Management, Virtual Agents, Software Coding, Restful APIs, Api Management, Microservices
- **Published:** October 23, 2026
- **Apply:** https://www.dcjobsite.com/job.asp?id=3466365214&tx=DT11404UHV&pt=1&aff=0B19D771-A501-4A5E-8338-2A822B784D54&utm_source=Job%20Feed&utm_medium=textkernel&utm_campaign=DE&utm_term=0B19D771-A501-4A5E-8338-2A822B784D54

## About the Role

* Bachelor's degree in Computer Science, Engineering, Information Technology, Mathematics, or a related discipline, or equivalent experience.
 * Minimum 8 years of professional Python development experience delivering enterprise-grade backend applications and services.
 * Strong expertise in:
 * Python
 * Object-Oriented Programming
 * Modular Architecture
 * Software Design Patterns
 * Dependency Management
 * PEP 8 Coding Standards
 * Hands-on experience developing REST APIs using:
 * FastAPI
 * OpenAPI/Swagger
 * API Authentication
 * Request Validation
 * Versioning Strategies
 * Strong experience with:
 * SQL
 * PostgreSQL
 * Data Modeling
 * Query Optimization
 * Indexing
 * Transaction Management
 * Experience with:
 * Pydantic
 * PyTest
 * Importlib
 * Caching Frameworks
 * Configuration Management
 * Proven ability to translate complex formulas, scientific calculations, and business logic into deterministic software components.
 * Experience building automated testing frameworks and test automation solutions.
 * Knowledge of secure software development principles and production support best practices.
 * Strong analytical, documentation, troubleshooting, and problem-solving skills.

Preferred Qualifications

 * Experience with Microsoft Azure, including:
 * Azure App Services
 * Azure DevOps
 * CI/CD Pipelines
 * Application Monitoring
 * Secrets Management
 * Experience working with containerized platforms and cloud-native architectures.
 * Familiarity with:
 * Building Science
 * Energy Efficiency Modeling
 * Water Efficiency Programs
 * Sustainability Standards
 * Carbon Accounting
 * Embodied Carbon Calculations
 * Experience implementing AI-assisted software development and engineering automation initiatives.
 * Exposure to sustainability technologies, environmental analytics, or green building certification programs.
 * Experience working within globally distributed Agile development teams.

Technical Expertise

## Description

Cognizant is seeking a highly skilled Senior Python Backend Engineer to support the development of the EDGE V4 Calculation Engine . This role will focus on designing, developing, enhancing, and maintaining scalable Python-based calculation services, APIs, and supporting platforms that deliver accurate, explainable, and high-performance sustainability calculations.

The successful candidate will work closely with product owners, architects, building science specialists, quality engineering teams, and DevOps professionals to translate complex business rules, formulas, and scientific models into reliable, maintainable, and production-ready software solutions., This position is onsite in Washington, DC . Team members are expected to work from the designated office location and collaborate closely with cross-functional teams throughout the product development lifecycle., Backend Development & Calculation Services

 * Design, develop, enhance, and maintain modular Python services and REST APIs supporting the EDGE V4 Calculation Engine.
 * Translate validated formulas, business rules, assumptions, and dependency flows into accurate, maintainable, and testable software components.
 * Develop calculation capabilities supporting:
 * Energy Modeling
 * Water Efficiency
 * Materials Analysis
 * Embodied Carbon Calculations
 * Baseline Standards
 * Scenario Simulations
 * Explainability Functions
 * Anomaly Management
 * Cost Calculations
 * Build reusable libraries, frameworks, and utilities that enable scalable and consistent development practices.

API & Platform Engineering

 * Design and develop secure RESTful APIs using Python and FastAPI.
 * Implement robust API contracts, structured request/response models, authentication mechanisms, and error-handling frameworks.
 * Develop reusable data models and validation frameworks using Pydantic and related technologies.
 * Integrate backend services with enterprise applications and external platforms through scalable interfaces.

Database & Data Management

 * Design and optimize PostgreSQL databases supporting high-volume calculations and data processing.
 * Develop efficient SQL queries, stored procedures, and data models.
 * Implement indexing, transaction management, caching, and performance optimization strategies.
 * Maintain version-controlled datasets and configuration-driven business logic.

Performance Optimization & Scalability

 * Improve application performance through:
 * Query Optimization
 * Caching Strategies
 * Asynchronous Processing
 * Scalable Service Architectures
 * Design solutions capable of supporting global user populations and high-volume calculation workloads.
 * Monitor and enhance overall system reliability, responsiveness, and throughput.

Testing & Quality Engineering

 * Develop and maintain:
 * Unit Tests
 * Integration Tests
 * Regression Tests
 * API Tests
 * Utilize PyTest and related frameworks to ensure code quality and application reliability.
 * Support system integration testing and user acceptance testing activities.
 * Perform defect analysis, troubleshooting, and root cause investigations.

Documentation & Technical Governance

 * Create and maintain:
 * Technical Documentation
 * API Specifications
 * Calculation Traceability Documentation
 * Data Dictionaries
 * Deployment Guides
 * Operational Runbooks
 * Ensure solutions meet documentation, auditability, and maintainability standards.
 * Participate in architecture reviews, code reviews, and technical design discussions.

DevOps & Production Support

 * Contribute to CI/CD pipelines and deployment automation processes.
 * Implement logging, monitoring, alerting, auditability, and operational support processes.
 * Support release planning, deployment activities, production issue resolution, and post-deployment support.
 * Manage application configurations, secrets management, and operational readiness.

AI & Engineering Productivity

 * Identify opportunities to improve engineering productivity using:
 * Artificial Intelligence
 * Generative AI
 * Intelligent Agents
 * Automation Tools
 * Developer Productivity Solutions
 * Develop practical automation solutions that improve code quality, accelerate testing, reduce manual effort, and enhance team effectiveness.
 * Support innovation initiatives that leverage emerging technologies to improve software delivery outcomes., * Python Development
 * FastAPI
 * REST API Design
 * PostgreSQL
 * SQL Optimization
 * Pydantic
 * PyTest
 * Azure Cloud Services
 * Azure DevOps
 * CI/CD Pipelines
 * Application Performance Optimization
 * Software Architecture
 * Automated Testing
 * Engineering Automation
 * Generative AI
 * Microservices Development
 * Sustainability Calculations
 * Production Support & Operations