Sr. Full Stack Engineer

WHAT YOU’LL DOViant is looking for a Senior Software Engineer to join the Potens team and help evolve Magnus and Goliath, two internal platforms that power workflow orchestration and large-scale data exploration.

This is a hands-on, full-stack engineering role combining the modernization of mature production systems with the development of new AI-powered capabilities. You’ll work across Java and Go backend services, browser-based JavaScript applications, data platforms, and emerging AI technologies.

A key part of the role will be expanding how users and authorized AI agents interact with our platforms from creating and managing workflows to exploring Big Query data, generating and executing SQL, and securely accessing platform capabilities through AI tools.

We’re looking for an engineer who enjoys solving complex production problems, working across the stack, and owning software from design through deployment and ongoing support.

Magnus is a visual workflow orchestration platform supporting Big Query, Cloud Storage, MySQL, REST APIs, email, FTP, conditional routing, parallel execution, Go and JavaScript scripting, YAML workflow definitions, debugging, audit history, and access controls.

Goliath is a lightweight, high-performance Big Query development interface for writing and executing SQL, browsing datasets and tables, visualizing results, and managing cost and quota allocation without requiring direct access to the GCP Console.

As these platforms evolve, you’ll help expand their AI capabilities, including enabling users and authorized AI agents to:

Create, understand, and modify Magnus workflows

Discover, execute, and monitor workflows through MCPExplore Big Query datasets and schemas through Goliath Generate, execute, and interpret SQL using AISecurely access platform capabilities through permission-aware AI toolsTHE DAY-TO-DAYMaintain and modernize Magnus Java applications, REST APIs, and Goliath’s JavaScript/jQuery frontend

Develop and support backend capabilities using Java and GoBuild production AI features and integrations using LLMs, tool calling, guardrails, evaluation, and MCPIntegrate with Big Query, MySQL, GCP services, and internal APIsDiagnose and resolve application, workflow, database, performance, and production issues

Build automated tests and deliver reliable, production-quality software

Own projects end to end, from technical proposal and implementation through deployment and production support

Participate in code reviews and contribute to sound engineering practices across the teamGREAT TO HAVEMCP server/client development and AI agent or tool-calling architectures

Go development in production environmentsGCP and Big Query Docker , Kubernetes, or GKEMySQL performance optimizationCI/CD pipelines, including Git Hub Actions Python development

Java 8, Tomcat, JSP, Code Mirror, or Chart.js Incremental modernization of mature applications while maintaining production stabilityLIFE AT VIANTInvesting in our employee’s professional growth is important to us, but so is investing in their well-being. That’s why Viant was voted one of the best places to work and some of our favorite employee benefits include fully paid health insurance, paid parental leave and unlimited PTO and more.

Base compensation range: $ - $In accordance with California law, the range provided is Viant’s reasonable estimate of the compensation for this role.  Final title and compensation for the position will be based on several factors including work experience and education.#LI-TD1

About Viant Viant Technology (NASDAQ: DSP) is an exclusively buy-side, AI-powered advertising platform purpose-built for CTV. Viant uniquely combines proprietary content intelligence, household-level identity resolution, and…