Vantaca

Senior Backend Engineer — AI Agents Platform (All Levels)

Vantaca
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10 months ago
Redwood City, CA, USAEntry Level / Mid Level / Senior / Staff+

Responsibilities

  • Build and operate agent runtime services for tool execution, state management, orchestration, retries, idempotency, and rate limiting.
  • Design stable, versioned internal and external APIs, webhook interfaces, and integration adapters.
  • Develop schemas and data access patterns for agent memory and state, workflow history, audit trails, permissions, and multi-tenant isolation.
  • Implement and maintain OAuth, webhook, synchronization, and connector integrations with observability and failure handling.
  • Improve reliability through SLIs/SLOs, end-to-end tracing, timeouts, circuit breakers, budgets, and incident response.
  • Optimize throughput, latency, queues, caching, storage, inference costs, and tool-call costs while adding safeguards for runaway tasks.
  • Raise engineering standards through testing strategy, on-call practices, runbooks, postmortems, code quality, and mentoring.

Requirements

  • 6+ years of experience building backend systems for production SaaS, platforms, or distributed systems.
  • Strong backend fundamentals in distributed systems, concurrency, queues and workers, caching, and production operations.
  • Expertise in relational data modeling with Postgres or MySQL, including migrations, indexing, query optimization, and data correctness.
  • Proven ability to design clear, evolvable APIs and service contracts for internal services and external partners.
  • Ability to work quickly while maintaining reliability and security, take ownership of systems end-to-end, and operate effectively amid ambiguity.
  • Preferred experience building products with LLMs, including prompting, tool calling, evaluations, and latency/cost tradeoffs.
  • Preferred familiarity with agent orchestration, planning and execution loops, memory and state, sandboxed tool execution, human-in-the-loop workflows, and safety constraints.
  • Preferred familiarity with Vercel AI SDK, LangChain/LangGraph, Anthropic Agents SDK, OpenAI tool calling, and sandboxing or tool runtimes.

Benefits

  • Medical, dental, and vision coverage beginning on day one.
  • Unlimited PTO with a requirement to take at least one continuous week off each year.
  • 401(k) with company match.
  • Remote-flexible work arrangement with office attendance when needed.
  • Parental leave benefits.
  • Ongoing industry and professional development training.
  • Employee-led culture committee.

Tech Stack

Categories

Vantaca

About Vantaca

201-500 employees

Vantaca builds a cloud platform for community association and HOA management companies, combining accounting, payments, workflows, resident communications, and banking integrations with AI-driven automation. It sells subscription software and offers optional managed services for complex financial tasks such as accounting and closings. Founded in 2016 and headquartered in Wilmington, North Carolina, the privately held company focuses exclusively on the community management market across the U.S.

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