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Sr. Software Engineer, Runtime

Viant

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Location:
United States, Los Angeles

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Category:
IT - Software Development

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Contract Type:
Not provided

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Salary:

130000.00 - 180000.00 USD / Year
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Job Description:

Viant’s customers use the Demand Side Platform (DSP) to set up, run and monitor ad campaigns. As a Sr. Software Engineer on our Runtime team, you will work directly with Viant’s ad server, managing a high-volume, low-latency application that processes billions of unique requests a day. This role offers a great opportunity to work with state-of-the-art technology as part of bid optimization, dynamic performance optimization, as well as develop a self-diagnostic and healing architecture. In this role, you will deliver simple, elegant, scalable, extensible solutions that strike the right balance between short-term and long-term considerations. You will design, develop, maintain, and trouble software features with an eye on cost, scalability, performance, and fault-tolerance. You will participate in design discussions, code reviews and bug triage / Root Cause Analysis (RCA) sessions. Primarily supporting Viant DSP, you will collaborate with Product, other Engineering and Technical operations teams on the entire lifecycle from ideation to productization and beyond.

Job Responsibility:

  • Provide technical expertise to implement and deliver various web and other system projects
  • Organize and participate in review sessions, contributing design insights and collaborating in architectural discussions
  • Participate in system testing to ensure quality deliverables and address issues through Root Cause Analysis (RCA)
  • Design, develop, and maintain scalable, high-performance systems with an emphasis on cost, scalability, and fault tolerance
  • Contribute to the development and continuous review of existing projects while identifying opportunities for future improvements
  • Engage in all phases of the software development lifecycle, from concept to deployment
  • Work on optimizing application performance, focusing on low-latency and high-throughput requirements
  • Interface with program managers, developers, and cross-functional teams for project-based assignments

Requirements:

  • Minimum B.S. in Computer Science or related fields preferred
  • Strong foundation in computer science and OOP
  • 5+ years of professional experience in the software industry
  • Experience programming in GoLang or Java
  • Experience with MySQL, Oracle, and other database technologies
  • Experience with AWS and related cloud technologies (e.g., EC2, S3, Lambda, RDS)
  • Expertise in designing and implementing scalable, high-performance distributed systems, including the ability to develop detailed design specifications
  • Familiarity with multithreading, concurrency, and low-latency application development
  • Expert ability to effectively identify and resolve project issues in a timely manner

Nice to have:

Ad-tech experience preferred

What we offer:
  • fully paid health insurance
  • paid parental leave
  • unlimited PTO

Additional Information:

Job Posted:
December 13, 2025

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