8 hours ago
London, United KingdomSenior
Responsibilities
- Develop secure, maintainable Python backend features for the Digital Onboarding Service in a serverless and containerized architecture.
- Design, build, and maintain RESTful APIs and microservices using FastAPI, Flask, or similar frameworks.
- Build cloud-native solutions using AWS services including Lambda, ECS Fargate, API Gateway, DynamoDB, S3, Secrets Manager, and CloudWatch.
- Implement integrations with internal systems and third-party APIs using REST, webhooks, and event-driven patterns.
- Apply clean architecture, SOLID principles, object-oriented design, repository, factory, strategy, and dependency-injection patterns.
- Implement resilient systems with retries, error handling, circuit breakers, dead-letter queues, and asynchronous messaging.
- Contribute to automated testing, performance optimization, monitoring, system reliability, CI/CD delivery, documentation, and knowledge sharing.
- Collaborate with technical architects, engineers, product managers, designers, client stakeholders, and DevOps teams.
Requirements
- Professional software engineering experience with strong commercial Python experience.
- Hands-on experience with FastAPI, Flask, or similar backend frameworks and extensive experience building RESTful APIs, microservices, and backend services.
- Strong AWS experience, including ECS Fargate, Lambda, API Gateway, DynamoDB, S3, SNS, SQS, EventBridge, Step Functions, IAM, Secrets Manager, and CloudWatch.
- Experience with serverless architecture, containerized applications, Docker, and AWS ECS/Fargate.
- Experience integrating third-party APIs, enterprise platforms, and external services.
- Strong understanding of software design patterns, object-oriented programming, clean code, and distributed-system design.
- Experience implementing API security using OAuth2, JWT, OpenID Connect, API keys, and secure authentication and authorization mechanisms.
- Experience with relational and NoSQL databases such as PostgreSQL, MySQL, Aurora, or DynamoDB.
- Infrastructure-as-Code experience with Terraform, AWS CDK, or CloudFormation is highly desirable.
- Understanding of deployment processes, monitoring, logging, environment management, data protection, access control, and secure software development practices.
- Experience in secure or regulated environments such as healthcare, finance, or government is beneficial.
- Experience working in Agile/Scrum delivery environments.
- Nice-to-have experience with React, Next.js, automated testing, WebSockets, event-driven or real-time data patterns, AWS Cognito, OpenAPI/Swagger, API lifecycle management, GitHub Actions, Azure DevOps, Jenkins, or AWS CodePipeline.
Tech Stack
Categories
About Cognizant
Cognizant (Nasdaq: CTSH) is an AI Builder and technology services provider, bridging the gap between AI investment and enterprise value. We build full-stack AI solutions powered by deep industry, process and engineering expertise — embedding an organization's unique context into technology systems that amplify human potential and drive tangible outcomes. From strategy to deployment, we help global enterprises move from AI ambition to AI impact and stay ahead in a fast-changing world. See how at cognizant.ai | Follow us @cognizant