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[Remote] Senior Software Engineer, Backend (AI Agent)

Remote · Spain Full-time

Note: The job is a remote job and is open to candidates in USA. Cresta is a company focused on enhancing customer experiences through AI technology. As a Senior Software Engineer, you will design and maintain server architectures for AI Agent solutions, ensuring reliability and performance in high-volume interactions.

Responsibilities

  • 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

Skills

  • Bachelor's degree in Computer Science or a related field
  • 5+ years of experience in backend system architecture, cloud services, or related technology fields
  • Proficient in designing and maintaining clear and robust APIs with a strong understanding of protocols including gRPC, REST
  • Previous experience working with Virtual Agent or AI Agent systems
  • 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

Benefits

  • Comprehensive medical, dental, and vision coverage with plans to fit you and your family
  • Flexible PTO to take the time you need, when you need it
  • Paid parental leave for all new parents welcoming a new child
  • Retirement savings plan to help you plan for the future
  • Remote work setup budget to help you create a productive home office
  • Monthly wellness and communication stipend to keep you connected and balanced
  • In-office meal program and commuter benefits provided for onsite employees

Company Overview

  • Cresta uses artificial intelligence to assist sales and service agents in the quality of customer service. It was founded in 2017, and is headquartered in Sunnyvale, California, USA, with a workforce of 201-500 employees. Its website is https://www.cresta.com.
  • Company H1B Sponsorship

  • Cresta has a track record of offering H1B sponsorships, with 2 in 2026, 9 in 2025, 6 in 2024, 2 in 2023, 10 in 2022, 4 in 2021, 3 in 2020. Please note that this does not guarantee sponsorship for this specific role.
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