Sr. Software Engineer, Infrastructure

Team: Engineering

Location: London

Commitment: Full Time

Workplace Type: onsite

Key Responsibilities:

• Maintain and enhance AWS infrastructure instrumentation and observability tools (e.g., Grafana, alarms) to ensure system reliability.
• Oversee Circadia's CI/CD pipelines (Jenkins) to enable efficient and seamless code deployment.
• Manage and maintain a fully separated staging environment for testing and development.
• Monitor AWS infrastructure for cost efficiency, identifying and implementing improvements.
• Optimize Snowflake ETL pipelines to reduce costs while maintaining performance and reliability.
• Manage GPT pipelines in Azure to ensure performance and cost-efficiency.
• Develop and maintain data pipelines for integrating external electronic health record (EHR) system data.
• Monitor and maintain MySQL databases to guarantee optimal performance and reliability.
• Collaborate with the backend team to design and implement APIs supporting Circadia's suite of products.


• Architecture: Design, deploy, and manage AWS infrastructure solutions to support various applications and services.
• Design scalable systems for storage and processing of large amounts of medical data.
• Manage databases (e.g., MySQL, MongoDB), optimizing for performance, scalability, and cost-efficiency.
• Manage compute clusters (e.g., ECS), serving various internal and customer-facing products and services.
• Utilize Terraform to efficiently manage cloud infrastructure.
• Ensure high availability, scalability, and reliability of the cloud environment.


• Security: Collaborate with development, operations, and security teams to ensure seamless integration and delivery of applications.
• Manage cloud infrastructure roles, permissions, and access credentials.
• Oversee regular and thorough rotation of access credentials and keys.


• Reliability: Troubleshoot and resolve infrastructure-related issues promptly and effectively.
• Maintain comprehensive and actionable runbooks for dealing with incidents and infrastructure outages.
• Create detailed post-mortems in case of significant outages.
• Implement automated alerting and incident response systems to identify and resolve issues quickly.


• Documentation: Create and maintain comprehensive documentation for cloud infrastructure and processes.
• Maintain documentation at a level required for a cloud infrastructure powering a SaMD (Software as a Medical Device) product.


• Instrumentation: Develop and maintain instrumentation infrastructure to ensure system health.
• Build instrumentation systems to provide timely system health checks and alerts using Prometheus and Grafana.
• Implement and maintain automated alerting and incident response systems for quick issue identification and resolution.


• DevOps Support: Automate routine tasks and processes to improve efficiency and reduce manual intervention.
• Implement and maintain CI/CD pipelines (Jenkins, CircleCI, or similar) to manage the deployment of Circadia’s services and products (backend services, Android, iOS, React apps).
• Write clean, testable code with a commitment to maintaining high coding standards through comprehensive testing (Jest, PyTest, JUnit, etc.).

Attributes:

• Need to Haves:
• C++ - Strong understanding of multithreading, asynchronous programming, network protocols
• Advanced knowledge of Python and related frameworks (FastAPI, NumPy, Pandas, Pydantic) including multithreading and parallel design principles.
• Understanding of AWS, including knowledge of Cognito, Pinpoint, IoT, MSK and other services.
• Deep understanding of user-centered design principles, design thinking methodologies, and usability best practices.
• Proficient in using and maintaining Docker containers.
• Strong understanding of RESTful API design principles and best practices.
• Experience with TDD and testing frameworks such as Boost.Test, Google Test, etc...


• Nice to Haves:
• Experience with Azure services for managing GPT pipelines and multi-cloud infrastructure.
• Familiarity with big data technologies such as Apache Spark, Kafka, and MSK for large-scale data processing.
• Experience with boost libraries (asio, beast).
• Advanced experience in cost optimization strategies for cloud infrastructure and database performance tuning.


• Technical acumen: Advanced knowledge of all AWS systems and services. 
• Detail oriented: Responsible for mission-critical healthcare products and services. 
• Communications and Trust: Phenomenal communication skills with the ability to maintain the highest levels of confidentiality on a consistent basis.
• Organisation and Getting Stuff Done: Juggling multiple projects and timelines. Prioritising. Keen eye for detail in all tasks and projects. Exceptional at making lists and maintaining organisation.
• Growth Mindset:  Your ability to learn from mistakes, reflect on mistakes, and not make mistakes again. Being curious and asking questions and facing resilience in the face of setbacks.

Benefits

• Join an energetic, diverse team dedicated to working towards the challenge of improving and saving patient lives
• Private health insurance with Vitality Health for you and your family, including discounted gym memberships, wellness retreats, fitness devices, and lots more
• 28 days paid annual leave during each holiday year (including bank holidays)
• Fully financed learning and personal development courses to help you grow in your role
• Opportunity to attend conferences and acquire certifications, paid for by the company
• New laptop of your choice for you to work on either at home, our at Circadia’s London Bridge office
• Flexible / hybrid working to suit your personal circumstances and allow you to be productive wherever you are most comfortable working
• Participate in and help plan regular team events, lunches and dinners