Senior C++ Developer Job Mississauga area,Ontario Canada,Software Development

Our client is seeking a Senior C++ Developer to lead and execute the migration of a large-scale existing C++ application to AWS while ensuring performance, stability, scalability, and security. (Hybrid, Toronto- 3 days per week)

Must Have skills

8+ years of C++ development experience

Strong expertise in modern C++ including C++11, C++14, C++17
, or later.

Experience working with large, complex C++ codebases.

Strong understanding of data structures, algorithms, multithreading, concurrency, memory management, and performance optimization
.

Hands-on AWS experience
, preferably including at least one end-to-end cloud migration or modernization project.

Experience migrating or modernizing applications to cloud environments.

Knowledge of AWS services including EC2, S3, IAM, VPC
, and cloud monitoring/logging tools such as Cloud Watch, X-Ray, or similar.

Understanding of cloud security best practices.

Strong debugging and problem-solving skills, preferably in Linux environments.

Nice to Have skills

Experience with AWS Lambda, RDS, SQS/SNS, and additional AWS-native services.

Experience with CI/CD, containerization, and cloud deployment strategies.

Exposure to cloud-native or cloud-adapted architecture patterns.

Experience mentoring junior developers or providing technical leadership.

Experience collaborating with architecture, Dev Ops, and product teams.

Responsibilities

Lead and contribute to the migration of a legacy or on-premises C++ application to AWS.

Analyze the existing C++ codebase and identify cloud-readiness gaps.

Refactor and modernize C++ code where required.

Design and implement cloud-friendly architectures, including stateless services, scalability, and fault tolerance.

Integrate C++ applications with AWS services such as EC2, S3, RDS, Lambda, SQS/SNS, and Cloud Watch.

Collaborate with Dev Ops teams on CI/CD, containerization, and deployment strategies.

Optimize application performance, memory usage, and latency in a cloud environment.

Ensure high availability, security, and monitoring of applications in AWS.

Participate in architecture reviews, technical design discussions, and code reviews.

Mentor junior developers and provide technical leadership.