Backend Engineer

The role

You will build and operate backend systems including integrations, a tool gateway, sandboxes, and the data layer. This role focuses on creating a solid harness for an agent that automates company processes.

What you will do

• Own integration quality end to end
• Build the tool gateway using Python SDK
• Run persistent, isolated, and autoscaled Linux sandboxes
• Own the multi-tenant data layer for state and persistence
• Build whatever needs building in a small team

Required qualifications

• Design distributed systems for scale and reliability
• Operate distributed systems in production
• Knowledge of sandboxing and OS-level isolation including containers and Linux internals
• Experience with OAuth, webhooks, rate limits, and third-party APIs
• Ability to design for multi-tenancy, durability, and cost per request
• Design with security and blast radius in mind
• Build with AI by default
• Proficiency in Python

Nice to have

• Worked on infrastructure, platform, or developer-tools teams
• Built sandboxing, code-execution, or multi-tenant systems
• At home in agentic engineering workflows
• Contributed to open-source infrastructure
• Founded something or been an early-stage builder

About the company

Viktor is one of the fastest-growing companies in the world building a backend harness for AGI-level models.