Software Engineer, Backend (AI Agent) Jobs

Cresta

Location:
Canada, Toronto

Category:
IT - Software Development

Contract Type:
Not provided

Salary:

Not provided

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Job Description:

At Cresta, the AI Agent team is on a mission to create state-of-the-art AI Agents that solve practical problems for our customers. We are focused on leveraging the latest technologies in Large Language Models (LLMs) and AI Agent systems, while ensuring that the solutions we develop are cost-effective, secure, and reliable. This role will involve hands-on work on cutting-edge projects, requiring innovative and passionate software engineers who can bring research into practical, scalable applications. As a Software Engineer, your goal will be to ensure that our AI Agents are backed by the most reliable and scalable server solutions. This includes designing and maintaining the server architecture that handles real-world, high-volume interactions and ensures high availability and performance. While we’re focused on server optimization and data management rather than pure research, you’ll be working with some of the most advanced technologies in the cloud and server space. This is a unique opportunity to shape the future of AI at Cresta by solving complex problems and bringing breakthrough AI advancements into production environments.

Job Responsibility:

Design, develop, and maintain scalable and robust backend architectures for Cresta’s AI Agent solutions and proprietary models
Collaborate with cross-functional teams including frontend engineers, machine learning engineers to ensure seamless integration of AI Agents into Cresta’s customer solutions
Lead initiatives to enhance system scalability and reliability in production environments, focusing on backend services that support AI functionalities
Drive efforts to optimize server response times, process large volumes of data efficiently, and maintain high system availability
Innovate and implement security measures, cost-reduction strategies, and performance improvements in backend systems supporting AI Agents

Requirements:

Bachelor’s degree in Computer Science or a related field
2+ years of experience in backend system architecture, cloud services, or related technology fields
Knowledge in designing and maintaining clear and robust APIs with a strong understanding of protocols including gRPC, REST
Experience in high-performance database schema design and query optimization, including knowledge of SQL and NoSQL databases
Experience in containerized application deployment using Kubernetes and Docker in microservices architectures
Experience with cloud environments such as AWS, Azure, or Google Cloud, with a strong understanding of cloud security and compliance standards

Nice to have:

Bonus: experience working with Virtual Agent or AI Agent systems

What we offer:

We offer Cresta employees a variety of medical, dental, and vision plans, designed to fit you and your family’s needs
Paid parental leave to support you and your family
Monthly Health & Wellness allowance
Work from home office stipend to help you succeed in a remote environment
Lunch reimbursement for in-office employees
PTO: 3 weeks in Canada

Additional Information:

Job Posted:
December 07, 2025

Employment Type:

Fulltime

Work Type:

Remote work

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Software Engineer, Backend (AI Agent)