Vantaca

Senior Backend Engineer — Payments (All Levels)

Redwood City, USA · Senior

Sponsorship not specifiedDetected 190 days ago

Distributed SystemsAPI DevelopmentMachine LearningAgentic AIIncident ResponseComplianceAccountingValuationMentoring

About the role

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.
HOAi was acquired by Vantaca in the fall of 2024.
Security and compliance-minded engineering: secrets management, least privilege, encryption, PCI-adjacent controls, and robust access/audit trails.

Build core payment services: authorization/capture, refunds, voids, disputes/chargebacks, payouts, and settlement flows.
Design a robust ledger: implement double-entry (or equivalent) accounting primitives, reconciliation pipelines, and audit-ready data models.
Integrate with payment providers: build and maintain integrations with PSPs, gateways, processors, and risk/fraud services; handle webhooks and event streams.
High-scale reliability: implement idempotency, retries, exactly-once/at-least-once semantics where appropriate, backpressure, and safe concurrency.
Observability and operations: build metrics/tracing/logging for payment lifecycles; run incident response; improve SLIs/SLOs and on-call hygiene.
Performance and cost: optimize throughput and latency across workflows; tune queues, databases, and caching for peak traffic.
implement double-entry (or equivalent) accounting primitives, reconciliation pipelines, and audit-ready data models.
build and maintain integrations with PSPs, gateways, processors, and risk/fraud services; handle webhooks and event streams.
implement idempotency, retries, exactly-once/at-least-once semantics where appropriate, backpressure, and safe concurrency.
build metrics/tracing/logging for payment lifecycles; run incident response; improve SLIs/SLOs and on-call hygiene.

Proven ability to operate high-availability services: monitoring, alerting, incident response, and postmortems.
Comfort working in a high-velocity environment while maintaining a correctness-first mindset.

Experience designing distributed systems with queues/workers, event-driven patterns, and failure handling.

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).
Great parental leave benefits.
Relentlessly perseveres through obstacles with resourcefulness and determination, turning ambitious vision into tangible results.
Remote Flexible - come to the office when needed.

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.
This transformation optimizes labor costs, enables growth without additional hires, and ensures faster, higher-quality service for residents and board members.
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.

This listing is sourced directly from Vantaca's careers page and normalized into a canonical job model.