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Leading the Connected Future of Community Management
The Role
The Senior Backend Engineer will build and operate backend systems for AI agents, focusing on reliability, API design, and data modeling, while enhancing code quality and performance in a fast-paced environment.
Summary Generated by Built In
Description
HOAi is a fast-growing startup revolutionizing the community association management industry. Our AI workforce platform integrates machine learning technology to streamline labor-heavy processes, eliminating inefficiencies and driving scalability. With rapid growth in the AI space, we are pushing boundaries to redefine industry standards.
HOAi is the leading AI solution for the community association management industry, enabling organizations to deploy AI Agents that function like experienced managers. These AI Agents go beyond traditional AI by proactively executing complex, multi-step processes with human-like reasoning—working autonomously, 24/7, across your entire operation. This transformation optimizes labor costs, enables growth without additional hires, and ensures faster, higher-quality service for residents and board members. HOAi was acquired by Vantaca in the fall of 2024. Vantaca just achieved unicorn status with a $1.25B valuation, so it's safe to say we're past the "scrappy startup phase." We're not just building a successful company – we're building the category-defining platform that will transform how an entire industry operates.
Here's the reality of our trajectory:
- Growing 100% year-over-year
- Our AI product (HOAi) went from $0 to millions in months
- Backed by Cove Hill Partners and JMI Private Equity
- 6M+ doors on our platform, displacing legacy systems
About the role
We’re building a large-scale, highly reliable platform for vertical AI agents. Our agents execute real workflows: they call tools, integrate with third-party systems, and operate over complex, evolving data. This role owns the backend systems that make agents dependable in production—agent runtime services, integrations, data modeling, observability, and platform reliability. You will work in a high-velocity environment with real ownership: you’ll design systems, ship quickly, measure outcomes, and harden the platform as it scales.
What you’ll do
- Own core backend services powering agents: build and operate the agent runtime services (tool execution, state management, orchestration, retries, idempotency, rate limiting).
- Design robust APIs and contracts: develop stable, well-versioned APIs (internal + external), including webhook/event interfaces and integration adapters.
- Model complex domain data: design schemas and data access patterns that support agent memory/state, workflow history, audit trails, permissions, and multi-tenant isolation.
- Integrations at scale: implement and maintain high-quality integrations (OAuth, webhooks, sync engines, connectors) with strong observability and failure handling.
- Reliability engineering: define and improve SLIs/SLOs, implement end-to-end tracing, build safety rails (timeouts, circuit breakers, budgets), and run incident response.
- Platform performance and cost control: optimize throughput/latency, queue backlogs, caching, storage, and inference/tool-call costs; build guardrails for runaway tasks.
- Raise engineering standards: drive code quality, testing strategy, on-call hygiene, runbooks, postmortems, and mentoring.
What we’re looking for
- Experience: 6+ years building backend systems for production SaaS, platforms, or distributed systems.
- Backend depth: strong fundamentals in distributed systems, concurrency, queues/workers, caching, and production operations.
- Data modeling strength: excellent relational modeling (Postgres/MySQL), migrations, indexing, query optimization, and data correctness.
- API design excellence: proven ability to design clear, evolvable APIs and contracts across services and external partners.
- High pace + high quality: you thrive in fast-moving environments without sacrificing reliability or security.
- Curiosity and ownership: you enjoy ambiguous problems, learn quickly, and take systems end-to-end (build → ship → operate).
Nice to have
- LLM experience: building product with LLMs (prompting, tool calling, evals, latency/cost tradeoffs).
- Agent architecture familiarity: orchestration patterns, planning/execution loops, memory/state, sandboxed tool execution, human-in-the-loop, safety constraints.
- Framework familiarity: Vercel AI SDK, LangChain/LangGraph, Anthropic Agents SDK, OpenAI tool calling, sandboxing/tool runtimes.
The HOAi Way
- Shoot for Impossible and Make it Happen: Sets audacious goals that others might see as unreachable and breaks them into actionable steps. Relentlessly perseveres through obstacles with resourcefulness and determination, turning ambitious vision into tangible results.
- Radical Candor Leads to Humble Excellence: Gives and receives direct, honest feedback with genuine care for others' growth. Stays open-minded on the path to continuous improvement, recognizing that the best outcomes come from carrying no ego.
- Hire and Develop the Best Talent: Actively seeks exceptional people who raise the bar and invests deeply in their growth. Creates opportunities for team members to stretch their capabilities, providing coaching and support that helps them reach their full potential.
Why You Should Join Our Team
- Our eNPS is +68! (Google it, that is great).
- Benefits: Medical, Dental, and Vision kick in day one.
- Unlimited PTO (with a requirement for employees to take a minimum of one continuous week per year).
- 401K with Company Match.
- Remote Flexible - come to the office when needed.
- Great parental leave benefits.
- Named on Inc 5000 list of America’s Fastest Growing Private Companies.
- Named on Inc 5000 Vet 100 Private Companies list multiple years in a row.
- Winner of Coastal Entrepreneur Award, Technology Category.
- Active employee-led Culture Committee.
- Ongoing industry and professional development trainings available to all employees.
- Multiple leaders on the executive committee recognized as 40 under 40 recipients for contributions to business and community.
- We’re playing offense to win! Our product market fit and our world-class employees make us the leader in our space. We’re building something cool and people like it here.
We receive many resumes for our open positions and each one is reviewed by a human being on our recruiting team. We will compare your background with the qualifications and requirements for the position. If you are selected for an interview you will receive an e-mail from someone on our recruiting team with an @vantaca.com email address. It may take some time for us to review all of the applications so give us some time to respond. We appreciate your interest in this role.
Skills Required
- 6+ years building backend systems for production SaaS, platforms, or distributed systems
- Strong fundamentals in distributed systems, concurrency, queues/workers, caching, and production operations
- Excellent relational modeling (Postgres/MySQL), migrations, indexing, query optimization, and data correctness
- Proven ability to design clear, evolvable APIs and contracts across services and external partners
- Ability to thrive in fast-moving environments without sacrificing reliability or security
- Enjoy ambiguous problems, learn quickly, and take systems end-to-end (build -> ship -> operate)
Vantaca Compensation & Benefits Highlights
The following summarizes recurring compensation and benefits themes identified from responses generated by popular LLMs to common candidate questions about Vantaca and has not been reviewed or approved by Vantaca.
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Healthcare Strength — Day-one medical, dental, and vision coverage is repeatedly presented as available immediately upon starting, reducing gaps during onboarding. This timing is typically viewed as a meaningful baseline benefit for new hires.
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Leave & Time Off Breadth — Unlimited PTO is described as available, with an added expectation to take at least one continuous week off annually. This suggests an emphasis on flexibility and encouraging real time away rather than only nominal policy coverage.
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Retirement Support — A 401(k) plan with a company match is referenced across multiple postings, indicating some employer contribution toward retirement savings. Even without the exact match formula disclosed, the presence of a match signals a competitive core benefit.
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The Company
What We Do
Vantaca is the leading community management software that empowers owners, operators, community management teams, and association boards to elevate business performance. More than just accounting and management software, Vantaca is a next-gen business operating system that drives revenue, boosts efficiency, enhances flexibility, and strengthens control. Built on a modern, cloud-based architecture, its single-platform design adapts seamlessly to 100% of business processes, delivers proactive insights through advanced reporting, and integrates with your preferred software and banking partners. Exclusively focused on community management, Vantaca is the trusted technology leader, serving as a proven partner for innovation and operational excellence in the community association management industry. Call to schedule a demo at 1-855-582-6822 or visit www.vantaca.com for more information.
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